// Generated tests - do not edit by hand
// Use: run `python3 SLS_Tests/yaml_to_rust_tests.py SLS_Tests/cases.yaml tests/lexer_tests_generated.rs`

use sls; // crate under test

const INT64_MIN: i128 = i64::MIN as i128;
const UINT64_MAX: i128 = u64::MAX as i128;

#[test]
fn test_empty_statement() {
    let src = "";
    let mut lexer = sls::lexer::Lexer::new(src);
    let mut got = vec![];
    loop {
        let t = lexer.next_token();
        if t.ttype == sls::lexer::TokenType::Eof { break; }
        got.push(t);
    }

    assert!(got.is_empty());
}

#[test]
fn test_integer_default_decimal_0() {
    let src = "0";
    let mut lexer = sls::lexer::Lexer::new(src);
    let mut got = vec![];
    loop {
        let t = lexer.next_token();
        if t.ttype == sls::lexer::TokenType::Eof { break; }
        got.push(t);
    }

    assert_eq!(got.len(), 1usize, "token count mismatch");
    assert_eq!(got[0].ttype, sls::lexer::TokenType::Int);
        assert!(got[0].numeric.is_some(), "expected numeric value");
        assert_eq!(got[0].numeric.unwrap(), 0);
}

#[test]
fn test_integer_default_decimal_1() {
    let src = "-1";
    let mut lexer = sls::lexer::Lexer::new(src);
    let mut got = vec![];
    loop {
        let t = lexer.next_token();
        if t.ttype == sls::lexer::TokenType::Eof { break; }
        got.push(t);
    }

    assert_eq!(got.len(), 1usize, "token count mismatch");
    assert_eq!(got[0].ttype, sls::lexer::TokenType::Int);
        assert!(got[0].numeric.is_some(), "expected numeric value");
        assert_eq!(got[0].numeric.unwrap(), -1);
}

#[test]
fn test_integer_default_decimal_42() {
    let src = "42";
    let mut lexer = sls::lexer::Lexer::new(src);
    let mut got = vec![];
    loop {
        let t = lexer.next_token();
        if t.ttype == sls::lexer::TokenType::Eof { break; }
        got.push(t);
    }

    assert_eq!(got.len(), 1usize, "token count mismatch");
    assert_eq!(got[0].ttype, sls::lexer::TokenType::Int);
        assert!(got[0].numeric.is_some(), "expected numeric value");
        assert_eq!(got[0].numeric.unwrap(), 42);
}

#[test]
fn test_integer_default_decimal_leading_zeros() {
    let src = "00042";
    let mut lexer = sls::lexer::Lexer::new(src);
    let mut got = vec![];
    loop {
        let t = lexer.next_token();
        if t.ttype == sls::lexer::TokenType::Eof { break; }
        got.push(t);
    }

    assert_eq!(got.len(), 1usize, "token count mismatch");
    assert_eq!(got[0].ttype, sls::lexer::TokenType::Int);
        assert!(got[0].numeric.is_some(), "expected numeric value");
        assert_eq!(got[0].numeric.unwrap(), 42);
}

#[test]
fn test_integer_default_hex_0xff() {
    let src = "0xFF";
    let mut lexer = sls::lexer::Lexer::new(src);
    let mut got = vec![];
    loop {
        let t = lexer.next_token();
        if t.ttype == sls::lexer::TokenType::Eof { break; }
        got.push(t);
    }

    assert_eq!(got.len(), 1usize, "token count mismatch");
    assert_eq!(got[0].ttype, sls::lexer::TokenType::Int);
        assert!(got[0].numeric.is_some(), "expected numeric value");
        assert_eq!(got[0].numeric.unwrap(), 255);
}

#[test]
fn test_integer_default_hex_0xdeadbeef() {
    let src = "0xdeadbeef";
    let mut lexer = sls::lexer::Lexer::new(src);
    let mut got = vec![];
    loop {
        let t = lexer.next_token();
        if t.ttype == sls::lexer::TokenType::Eof { break; }
        got.push(t);
    }

    assert_eq!(got.len(), 1usize, "token count mismatch");
    assert_eq!(got[0].ttype, sls::lexer::TokenType::Int);
        assert!(got[0].numeric.is_some(), "expected numeric value");
        assert_eq!(got[0].numeric.unwrap(), 3735928559);
}

#[test]
fn test_integer_default_hex_max() {
    let src = "0x7FFFFFFFFFFFFFFF";
    let mut lexer = sls::lexer::Lexer::new(src);
    let mut got = vec![];
    loop {
        let t = lexer.next_token();
        if t.ttype == sls::lexer::TokenType::Eof { break; }
        got.push(t);
    }

    assert_eq!(got.len(), 1usize, "token count mismatch");
    assert_eq!(got[0].ttype, sls::lexer::TokenType::Int);
        assert!(got[0].numeric.is_some(), "expected numeric value");
        assert_eq!(got[0].numeric.unwrap(), 9223372036854775807);
}

#[test]
fn test_integer_default_binary_0b1010() {
    let src = "0b1010";
    let mut lexer = sls::lexer::Lexer::new(src);
    let mut got = vec![];
    loop {
        let t = lexer.next_token();
        if t.ttype == sls::lexer::TokenType::Eof { break; }
        got.push(t);
    }

    assert_eq!(got.len(), 1usize, "token count mismatch");
    assert_eq!(got[0].ttype, sls::lexer::TokenType::Int);
        assert!(got[0].numeric.is_some(), "expected numeric value");
        assert_eq!(got[0].numeric.unwrap(), 10);
}

#[test]
fn test_integer_default_binary_all_ones() {
    let src = "0b1111111111111111";
    let mut lexer = sls::lexer::Lexer::new(src);
    let mut got = vec![];
    loop {
        let t = lexer.next_token();
        if t.ttype == sls::lexer::TokenType::Eof { break; }
        got.push(t);
    }

    assert_eq!(got.len(), 1usize, "token count mismatch");
    assert_eq!(got[0].ttype, sls::lexer::TokenType::Int);
        assert!(got[0].numeric.is_some(), "expected numeric value");
        assert_eq!(got[0].numeric.unwrap(), 65535);
}

#[test]
fn test_integer_default_octal_0o755() {
    let src = "0o755";
    let mut lexer = sls::lexer::Lexer::new(src);
    let mut got = vec![];
    loop {
        let t = lexer.next_token();
        if t.ttype == sls::lexer::TokenType::Eof { break; }
        got.push(t);
    }

    assert_eq!(got.len(), 1usize, "token count mismatch");
    assert_eq!(got[0].ttype, sls::lexer::TokenType::Int);
        assert!(got[0].numeric.is_some(), "expected numeric value");
        assert_eq!(got[0].numeric.unwrap(), 493);
}

#[test]
fn test_integer_default_octal_max_three_digits() {
    let src = "0o777";
    let mut lexer = sls::lexer::Lexer::new(src);
    let mut got = vec![];
    loop {
        let t = lexer.next_token();
        if t.ttype == sls::lexer::TokenType::Eof { break; }
        got.push(t);
    }

    assert_eq!(got.len(), 1usize, "token count mismatch");
    assert_eq!(got[0].ttype, sls::lexer::TokenType::Int);
        assert!(got[0].numeric.is_some(), "expected numeric value");
        assert_eq!(got[0].numeric.unwrap(), 511);
}

#[test]
fn test_integer_default_decimal_max_i64() {
    let src = "9223372036854775807";
    let mut lexer = sls::lexer::Lexer::new(src);
    let mut got = vec![];
    loop {
        let t = lexer.next_token();
        if t.ttype == sls::lexer::TokenType::Eof { break; }
        got.push(t);
    }

    assert_eq!(got.len(), 1usize, "token count mismatch");
    assert_eq!(got[0].ttype, sls::lexer::TokenType::Int);
        assert!(got[0].numeric.is_some(), "expected numeric value");
        assert_eq!(got[0].numeric.unwrap(), 9223372036854775807);
}

#[test]
fn test_integer_default_decimal_min_i64() {
    let src = "-9223372036854775808";
    let mut lexer = sls::lexer::Lexer::new(src);
    let mut got = vec![];
    loop {
        let t = lexer.next_token();
        if t.ttype == sls::lexer::TokenType::Eof { break; }
        got.push(t);
    }

    assert_eq!(got.len(), 1usize, "token count mismatch");
    assert_eq!(got[0].ttype, sls::lexer::TokenType::Int);
        assert!(got[0].numeric.is_some(), "expected numeric value");
        assert_eq!(got[0].numeric.unwrap(), INT64_MIN);
}

#[test]
fn test_integer_default_decimal_with_underscore() {
    let src = "1_000_000";
    let mut lexer = sls::lexer::Lexer::new(src);
    let mut got = vec![];
    loop {
        let t = lexer.next_token();
        if t.ttype == sls::lexer::TokenType::Eof { break; }
        got.push(t);
    }

    assert_eq!(got.len(), 1usize, "token count mismatch");
    assert_eq!(got[0].ttype, sls::lexer::TokenType::Int);
        assert!(got[0].numeric.is_some(), "expected numeric value");
        assert_eq!(got[0].numeric.unwrap(), 1000000);
}

#[test]
fn test_integer_default_underscore_end() {
    let src = "42_";
    let mut lexer = sls::lexer::Lexer::new(src);
    let mut got = vec![];
    loop {
        let t = lexer.next_token();
        if t.ttype == sls::lexer::TokenType::Eof { break; }
        got.push(t);
    }

    assert_eq!(got.len(), 1usize, "token count mismatch");
    assert_eq!(got[0].ttype, sls::lexer::TokenType::Int);
        assert!(got[0].numeric.is_some(), "expected numeric value");
        assert_eq!(got[0].numeric.unwrap(), 42);
}

#[test]
fn test_integer_default_underscore_double() {
    let src = "4__2";
    let mut lexer = sls::lexer::Lexer::new(src);
    let mut got = vec![];
    loop {
        let t = lexer.next_token();
        if t.ttype == sls::lexer::TokenType::Eof { break; }
        got.push(t);
    }

    assert_eq!(got.len(), 1usize, "token count mismatch");
    assert_eq!(got[0].ttype, sls::lexer::TokenType::Int);
        assert!(got[0].numeric.is_some(), "expected numeric value");
        assert_eq!(got[0].numeric.unwrap(), 42);
}

#[test]
fn test_integer_default_whitespace() {
    let src = "  42  ";
    let mut lexer = sls::lexer::Lexer::new(src);
    let mut got = vec![];
    loop {
        let t = lexer.next_token();
        if t.ttype == sls::lexer::TokenType::Eof { break; }
        got.push(t);
    }

    assert_eq!(got.len(), 1usize, "token count mismatch");
    assert_eq!(got[0].ttype, sls::lexer::TokenType::Int);
        assert!(got[0].numeric.is_some(), "expected numeric value");
        assert_eq!(got[0].numeric.unwrap(), 42);
}

#[test]
fn test_integer_default_hex_zero() {
    let src = "0x0";
    let mut lexer = sls::lexer::Lexer::new(src);
    let mut got = vec![];
    loop {
        let t = lexer.next_token();
        if t.ttype == sls::lexer::TokenType::Eof { break; }
        got.push(t);
    }

    assert_eq!(got.len(), 1usize, "token count mismatch");
    assert_eq!(got[0].ttype, sls::lexer::TokenType::Int);
        assert!(got[0].numeric.is_some(), "expected numeric value");
        assert_eq!(got[0].numeric.unwrap(), 0);
}

#[test]
fn test_integer_default_binary_zero() {
    let src = "0b0";
    let mut lexer = sls::lexer::Lexer::new(src);
    let mut got = vec![];
    loop {
        let t = lexer.next_token();
        if t.ttype == sls::lexer::TokenType::Eof { break; }
        got.push(t);
    }

    assert_eq!(got.len(), 1usize, "token count mismatch");
    assert_eq!(got[0].ttype, sls::lexer::TokenType::Int);
        assert!(got[0].numeric.is_some(), "expected numeric value");
        assert_eq!(got[0].numeric.unwrap(), 0);
}

#[test]
fn test_integer_default_octal_zero() {
    let src = "0o0";
    let mut lexer = sls::lexer::Lexer::new(src);
    let mut got = vec![];
    loop {
        let t = lexer.next_token();
        if t.ttype == sls::lexer::TokenType::Eof { break; }
        got.push(t);
    }

    assert_eq!(got.len(), 1usize, "token count mismatch");
    assert_eq!(got[0].ttype, sls::lexer::TokenType::Int);
        assert!(got[0].numeric.is_some(), "expected numeric value");
        assert_eq!(got[0].numeric.unwrap(), 0);
}

#[test]
fn test_integer_default_decimal_with_commas_invalid() {
    let src = "1,000,000";
    let mut lexer = sls::lexer::Lexer::new(src);
    let mut got = vec![];
    loop {
        let t = lexer.next_token();
        if t.ttype == sls::lexer::TokenType::Eof { break; }
        got.push(t);
    }

    assert_eq!(got.len(), 1usize, "token count mismatch");
    assert_eq!(got[0].ttype, sls::lexer::TokenType::Illegal);
}

#[test]
fn test_integer_default_invalid_characters() {
    let src = "12a3";
    let mut lexer = sls::lexer::Lexer::new(src);
    let mut got = vec![];
    loop {
        let t = lexer.next_token();
        if t.ttype == sls::lexer::TokenType::Eof { break; }
        got.push(t);
    }

    assert_eq!(got.len(), 1usize, "token count mismatch");
    assert_eq!(got[0].ttype, sls::lexer::TokenType::Illegal);
}

#[test]
fn test_integer_default_invalid_prefix() {
    let src = "0b2";
    let mut lexer = sls::lexer::Lexer::new(src);
    let mut got = vec![];
    loop {
        let t = lexer.next_token();
        if t.ttype == sls::lexer::TokenType::Eof { break; }
        got.push(t);
    }

    assert_eq!(got.len(), 1usize, "token count mismatch");
    assert_eq!(got[0].ttype, sls::lexer::TokenType::Illegal);
}

#[test]
fn test_integer_i8_decimal_positive() {
    let src = "42:i8";
    let mut lexer = sls::lexer::Lexer::new(src);
    let mut got = vec![];
    loop {
        let t = lexer.next_token();
        if t.ttype == sls::lexer::TokenType::Eof { break; }
        got.push(t);
    }

    assert_eq!(got.len(), 1usize, "token count mismatch");
    assert_eq!(got[0].ttype, sls::lexer::TokenType::Int);
        assert!(got[0].numeric.is_some(), "expected numeric value");
        assert_eq!(got[0].numeric.unwrap(), 42);
}

#[test]
fn test_integer_i8_zero() {
    let src = "0:i8";
    let mut lexer = sls::lexer::Lexer::new(src);
    let mut got = vec![];
    loop {
        let t = lexer.next_token();
        if t.ttype == sls::lexer::TokenType::Eof { break; }
        got.push(t);
    }

    assert_eq!(got.len(), 1usize, "token count mismatch");
    assert_eq!(got[0].ttype, sls::lexer::TokenType::Int);
        assert!(got[0].numeric.is_some(), "expected numeric value");
        assert_eq!(got[0].numeric.unwrap(), 0);
}

#[test]
fn test_integer_i8_decimal_negative() {
    let src = "-100:i8";
    let mut lexer = sls::lexer::Lexer::new(src);
    let mut got = vec![];
    loop {
        let t = lexer.next_token();
        if t.ttype == sls::lexer::TokenType::Eof { break; }
        got.push(t);
    }

    assert_eq!(got.len(), 1usize, "token count mismatch");
    assert_eq!(got[0].ttype, sls::lexer::TokenType::Int);
        assert!(got[0].numeric.is_some(), "expected numeric value");
        assert_eq!(got[0].numeric.unwrap(), -100);
}

#[test]
fn test_integer_i8_hex() {
    let src = "0x7F:i8";
    let mut lexer = sls::lexer::Lexer::new(src);
    let mut got = vec![];
    loop {
        let t = lexer.next_token();
        if t.ttype == sls::lexer::TokenType::Eof { break; }
        got.push(t);
    }

    assert_eq!(got.len(), 1usize, "token count mismatch");
    assert_eq!(got[0].ttype, sls::lexer::TokenType::Int);
        assert!(got[0].numeric.is_some(), "expected numeric value");
        assert_eq!(got[0].numeric.unwrap(), 127);
}

#[test]
fn test_integer_i8_binary() {
    let src = "0b1111:i8";
    let mut lexer = sls::lexer::Lexer::new(src);
    let mut got = vec![];
    loop {
        let t = lexer.next_token();
        if t.ttype == sls::lexer::TokenType::Eof { break; }
        got.push(t);
    }

    assert_eq!(got.len(), 1usize, "token count mismatch");
    assert_eq!(got[0].ttype, sls::lexer::TokenType::Int);
        assert!(got[0].numeric.is_some(), "expected numeric value");
        assert_eq!(got[0].numeric.unwrap(), 15);
}

#[test]
fn test_integer_i8_octal() {
    let src = "0o77:i8";
    let mut lexer = sls::lexer::Lexer::new(src);
    let mut got = vec![];
    loop {
        let t = lexer.next_token();
        if t.ttype == sls::lexer::TokenType::Eof { break; }
        got.push(t);
    }

    assert_eq!(got.len(), 1usize, "token count mismatch");
    assert_eq!(got[0].ttype, sls::lexer::TokenType::Int);
        assert!(got[0].numeric.is_some(), "expected numeric value");
        assert_eq!(got[0].numeric.unwrap(), 63);
}

#[test]
fn test_integer_i8_max_value() {
    let src = "127:i8";
    let mut lexer = sls::lexer::Lexer::new(src);
    let mut got = vec![];
    loop {
        let t = lexer.next_token();
        if t.ttype == sls::lexer::TokenType::Eof { break; }
        got.push(t);
    }

    assert_eq!(got.len(), 1usize, "token count mismatch");
    assert_eq!(got[0].ttype, sls::lexer::TokenType::Int);
        assert!(got[0].numeric.is_some(), "expected numeric value");
        assert_eq!(got[0].numeric.unwrap(), 127);
}

#[test]
fn test_integer_i8_min_value() {
    let src = "-128:i8";
    let mut lexer = sls::lexer::Lexer::new(src);
    let mut got = vec![];
    loop {
        let t = lexer.next_token();
        if t.ttype == sls::lexer::TokenType::Eof { break; }
        got.push(t);
    }

    assert_eq!(got.len(), 1usize, "token count mismatch");
    assert_eq!(got[0].ttype, sls::lexer::TokenType::Int);
        assert!(got[0].numeric.is_some(), "expected numeric value");
        assert_eq!(got[0].numeric.unwrap(), -128);
}

#[test]
fn test_integer_i8_overflow() {
    let src = "128:i8";
    let mut lexer = sls::lexer::Lexer::new(src);
    let mut got = vec![];
    loop {
        let t = lexer.next_token();
        if t.ttype == sls::lexer::TokenType::Eof { break; }
        got.push(t);
    }

    assert_eq!(got.len(), 1usize, "token count mismatch");
    assert_eq!(got[0].ttype, sls::lexer::TokenType::Illegal);
}

#[test]
fn test_integer_i8_underflow() {
    let src = "-129:i8";
    let mut lexer = sls::lexer::Lexer::new(src);
    let mut got = vec![];
    loop {
        let t = lexer.next_token();
        if t.ttype == sls::lexer::TokenType::Eof { break; }
        got.push(t);
    }

    assert_eq!(got.len(), 1usize, "token count mismatch");
    assert_eq!(got[0].ttype, sls::lexer::TokenType::Illegal);
}

#[test]
fn test_integer_i16_decimal_positive() {
    let src = "42:i16";
    let mut lexer = sls::lexer::Lexer::new(src);
    let mut got = vec![];
    loop {
        let t = lexer.next_token();
        if t.ttype == sls::lexer::TokenType::Eof { break; }
        got.push(t);
    }

    assert_eq!(got.len(), 1usize, "token count mismatch");
    assert_eq!(got[0].ttype, sls::lexer::TokenType::Int);
        assert!(got[0].numeric.is_some(), "expected numeric value");
        assert_eq!(got[0].numeric.unwrap(), 42);
}

#[test]
fn test_integer_i16_zero() {
    let src = "0:i16";
    let mut lexer = sls::lexer::Lexer::new(src);
    let mut got = vec![];
    loop {
        let t = lexer.next_token();
        if t.ttype == sls::lexer::TokenType::Eof { break; }
        got.push(t);
    }

    assert_eq!(got.len(), 1usize, "token count mismatch");
    assert_eq!(got[0].ttype, sls::lexer::TokenType::Int);
        assert!(got[0].numeric.is_some(), "expected numeric value");
        assert_eq!(got[0].numeric.unwrap(), 0);
}

#[test]
fn test_integer_i16_decimal_negative() {
    let src = "-100:i16";
    let mut lexer = sls::lexer::Lexer::new(src);
    let mut got = vec![];
    loop {
        let t = lexer.next_token();
        if t.ttype == sls::lexer::TokenType::Eof { break; }
        got.push(t);
    }

    assert_eq!(got.len(), 1usize, "token count mismatch");
    assert_eq!(got[0].ttype, sls::lexer::TokenType::Int);
        assert!(got[0].numeric.is_some(), "expected numeric value");
        assert_eq!(got[0].numeric.unwrap(), -100);
}

#[test]
fn test_integer_i16_hex() {
    let src = "0xFF:i16";
    let mut lexer = sls::lexer::Lexer::new(src);
    let mut got = vec![];
    loop {
        let t = lexer.next_token();
        if t.ttype == sls::lexer::TokenType::Eof { break; }
        got.push(t);
    }

    assert_eq!(got.len(), 1usize, "token count mismatch");
    assert_eq!(got[0].ttype, sls::lexer::TokenType::Int);
        assert!(got[0].numeric.is_some(), "expected numeric value");
        assert_eq!(got[0].numeric.unwrap(), 255);
}

#[test]
fn test_integer_i16_binary() {
    let src = "0b1111:i16";
    let mut lexer = sls::lexer::Lexer::new(src);
    let mut got = vec![];
    loop {
        let t = lexer.next_token();
        if t.ttype == sls::lexer::TokenType::Eof { break; }
        got.push(t);
    }

    assert_eq!(got.len(), 1usize, "token count mismatch");
    assert_eq!(got[0].ttype, sls::lexer::TokenType::Int);
        assert!(got[0].numeric.is_some(), "expected numeric value");
        assert_eq!(got[0].numeric.unwrap(), 15);
}

#[test]
fn test_integer_i16_octal() {
    let src = "0o77:i16";
    let mut lexer = sls::lexer::Lexer::new(src);
    let mut got = vec![];
    loop {
        let t = lexer.next_token();
        if t.ttype == sls::lexer::TokenType::Eof { break; }
        got.push(t);
    }

    assert_eq!(got.len(), 1usize, "token count mismatch");
    assert_eq!(got[0].ttype, sls::lexer::TokenType::Int);
        assert!(got[0].numeric.is_some(), "expected numeric value");
        assert_eq!(got[0].numeric.unwrap(), 63);
}

#[test]
fn test_integer_i16_max_value() {
    let src = "32767:i16";
    let mut lexer = sls::lexer::Lexer::new(src);
    let mut got = vec![];
    loop {
        let t = lexer.next_token();
        if t.ttype == sls::lexer::TokenType::Eof { break; }
        got.push(t);
    }

    assert_eq!(got.len(), 1usize, "token count mismatch");
    assert_eq!(got[0].ttype, sls::lexer::TokenType::Int);
        assert!(got[0].numeric.is_some(), "expected numeric value");
        assert_eq!(got[0].numeric.unwrap(), 32767);
}

#[test]
fn test_integer_i16_min_value() {
    let src = "-32768:i16";
    let mut lexer = sls::lexer::Lexer::new(src);
    let mut got = vec![];
    loop {
        let t = lexer.next_token();
        if t.ttype == sls::lexer::TokenType::Eof { break; }
        got.push(t);
    }

    assert_eq!(got.len(), 1usize, "token count mismatch");
    assert_eq!(got[0].ttype, sls::lexer::TokenType::Int);
        assert!(got[0].numeric.is_some(), "expected numeric value");
        assert_eq!(got[0].numeric.unwrap(), -32768);
}

#[test]
fn test_integer_i16_overflow() {
    let src = "32768:i16";
    let mut lexer = sls::lexer::Lexer::new(src);
    let mut got = vec![];
    loop {
        let t = lexer.next_token();
        if t.ttype == sls::lexer::TokenType::Eof { break; }
        got.push(t);
    }

    assert_eq!(got.len(), 1usize, "token count mismatch");
    assert_eq!(got[0].ttype, sls::lexer::TokenType::Illegal);
}

#[test]
fn test_integer_i16_underflow() {
    let src = "-32769:i16";
    let mut lexer = sls::lexer::Lexer::new(src);
    let mut got = vec![];
    loop {
        let t = lexer.next_token();
        if t.ttype == sls::lexer::TokenType::Eof { break; }
        got.push(t);
    }

    assert_eq!(got.len(), 1usize, "token count mismatch");
    assert_eq!(got[0].ttype, sls::lexer::TokenType::Illegal);
}

#[test]
fn test_integer_i32_decimal_positive() {
    let src = "42:i32";
    let mut lexer = sls::lexer::Lexer::new(src);
    let mut got = vec![];
    loop {
        let t = lexer.next_token();
        if t.ttype == sls::lexer::TokenType::Eof { break; }
        got.push(t);
    }

    assert_eq!(got.len(), 1usize, "token count mismatch");
    assert_eq!(got[0].ttype, sls::lexer::TokenType::Int);
        assert!(got[0].numeric.is_some(), "expected numeric value");
        assert_eq!(got[0].numeric.unwrap(), 42);
}

#[test]
fn test_integer_i32_zero() {
    let src = "0:i32";
    let mut lexer = sls::lexer::Lexer::new(src);
    let mut got = vec![];
    loop {
        let t = lexer.next_token();
        if t.ttype == sls::lexer::TokenType::Eof { break; }
        got.push(t);
    }

    assert_eq!(got.len(), 1usize, "token count mismatch");
    assert_eq!(got[0].ttype, sls::lexer::TokenType::Int);
        assert!(got[0].numeric.is_some(), "expected numeric value");
        assert_eq!(got[0].numeric.unwrap(), 0);
}

#[test]
fn test_integer_i32_decimal_negative() {
    let src = "-100:i32";
    let mut lexer = sls::lexer::Lexer::new(src);
    let mut got = vec![];
    loop {
        let t = lexer.next_token();
        if t.ttype == sls::lexer::TokenType::Eof { break; }
        got.push(t);
    }

    assert_eq!(got.len(), 1usize, "token count mismatch");
    assert_eq!(got[0].ttype, sls::lexer::TokenType::Int);
        assert!(got[0].numeric.is_some(), "expected numeric value");
        assert_eq!(got[0].numeric.unwrap(), -100);
}

#[test]
fn test_integer_i32_hex() {
    let src = "0xFF:i32";
    let mut lexer = sls::lexer::Lexer::new(src);
    let mut got = vec![];
    loop {
        let t = lexer.next_token();
        if t.ttype == sls::lexer::TokenType::Eof { break; }
        got.push(t);
    }

    assert_eq!(got.len(), 1usize, "token count mismatch");
    assert_eq!(got[0].ttype, sls::lexer::TokenType::Int);
        assert!(got[0].numeric.is_some(), "expected numeric value");
        assert_eq!(got[0].numeric.unwrap(), 255);
}

#[test]
fn test_integer_i32_binary() {
    let src = "0b1111:i32";
    let mut lexer = sls::lexer::Lexer::new(src);
    let mut got = vec![];
    loop {
        let t = lexer.next_token();
        if t.ttype == sls::lexer::TokenType::Eof { break; }
        got.push(t);
    }

    assert_eq!(got.len(), 1usize, "token count mismatch");
    assert_eq!(got[0].ttype, sls::lexer::TokenType::Int);
        assert!(got[0].numeric.is_some(), "expected numeric value");
        assert_eq!(got[0].numeric.unwrap(), 15);
}

#[test]
fn test_integer_i32_octal() {
    let src = "0o77:i32";
    let mut lexer = sls::lexer::Lexer::new(src);
    let mut got = vec![];
    loop {
        let t = lexer.next_token();
        if t.ttype == sls::lexer::TokenType::Eof { break; }
        got.push(t);
    }

    assert_eq!(got.len(), 1usize, "token count mismatch");
    assert_eq!(got[0].ttype, sls::lexer::TokenType::Int);
        assert!(got[0].numeric.is_some(), "expected numeric value");
        assert_eq!(got[0].numeric.unwrap(), 63);
}

#[test]
fn test_integer_i32_max_value() {
    let src = "2147483647:i32";
    let mut lexer = sls::lexer::Lexer::new(src);
    let mut got = vec![];
    loop {
        let t = lexer.next_token();
        if t.ttype == sls::lexer::TokenType::Eof { break; }
        got.push(t);
    }

    assert_eq!(got.len(), 1usize, "token count mismatch");
    assert_eq!(got[0].ttype, sls::lexer::TokenType::Int);
        assert!(got[0].numeric.is_some(), "expected numeric value");
        assert_eq!(got[0].numeric.unwrap(), 2147483647);
}

#[test]
fn test_integer_i32_min_value() {
    let src = "-2147483648:i32";
    let mut lexer = sls::lexer::Lexer::new(src);
    let mut got = vec![];
    loop {
        let t = lexer.next_token();
        if t.ttype == sls::lexer::TokenType::Eof { break; }
        got.push(t);
    }

    assert_eq!(got.len(), 1usize, "token count mismatch");
    assert_eq!(got[0].ttype, sls::lexer::TokenType::Int);
        assert!(got[0].numeric.is_some(), "expected numeric value");
        assert_eq!(got[0].numeric.unwrap(), -2147483648);
}

#[test]
fn test_integer_i32_overflow() {
    let src = "2147483648:i32";
    let mut lexer = sls::lexer::Lexer::new(src);
    let mut got = vec![];
    loop {
        let t = lexer.next_token();
        if t.ttype == sls::lexer::TokenType::Eof { break; }
        got.push(t);
    }

    assert_eq!(got.len(), 1usize, "token count mismatch");
    assert_eq!(got[0].ttype, sls::lexer::TokenType::Illegal);
}

#[test]
fn test_integer_i32_underflow() {
    let src = "-2147483649:i32";
    let mut lexer = sls::lexer::Lexer::new(src);
    let mut got = vec![];
    loop {
        let t = lexer.next_token();
        if t.ttype == sls::lexer::TokenType::Eof { break; }
        got.push(t);
    }

    assert_eq!(got.len(), 1usize, "token count mismatch");
    assert_eq!(got[0].ttype, sls::lexer::TokenType::Illegal);
}

#[test]
fn test_integer_i32_with_underscores() {
    let src = "1_000_000:i32";
    let mut lexer = sls::lexer::Lexer::new(src);
    let mut got = vec![];
    loop {
        let t = lexer.next_token();
        if t.ttype == sls::lexer::TokenType::Eof { break; }
        got.push(t);
    }

    assert_eq!(got.len(), 1usize, "token count mismatch");
    assert_eq!(got[0].ttype, sls::lexer::TokenType::Int);
        assert!(got[0].numeric.is_some(), "expected numeric value");
        assert_eq!(got[0].numeric.unwrap(), 1000000);
}

#[test]
fn test_integer_i64_decimal_positive() {
    let src = "42:i64";
    let mut lexer = sls::lexer::Lexer::new(src);
    let mut got = vec![];
    loop {
        let t = lexer.next_token();
        if t.ttype == sls::lexer::TokenType::Eof { break; }
        got.push(t);
    }

    assert_eq!(got.len(), 1usize, "token count mismatch");
    assert_eq!(got[0].ttype, sls::lexer::TokenType::Int);
        assert!(got[0].numeric.is_some(), "expected numeric value");
        assert_eq!(got[0].numeric.unwrap(), 42);
}

#[test]
fn test_integer_i64_zero() {
    let src = "0:i64";
    let mut lexer = sls::lexer::Lexer::new(src);
    let mut got = vec![];
    loop {
        let t = lexer.next_token();
        if t.ttype == sls::lexer::TokenType::Eof { break; }
        got.push(t);
    }

    assert_eq!(got.len(), 1usize, "token count mismatch");
    assert_eq!(got[0].ttype, sls::lexer::TokenType::Int);
        assert!(got[0].numeric.is_some(), "expected numeric value");
        assert_eq!(got[0].numeric.unwrap(), 0);
}

#[test]
fn test_integer_i64_decimal_negative() {
    let src = "-100:i64";
    let mut lexer = sls::lexer::Lexer::new(src);
    let mut got = vec![];
    loop {
        let t = lexer.next_token();
        if t.ttype == sls::lexer::TokenType::Eof { break; }
        got.push(t);
    }

    assert_eq!(got.len(), 1usize, "token count mismatch");
    assert_eq!(got[0].ttype, sls::lexer::TokenType::Int);
        assert!(got[0].numeric.is_some(), "expected numeric value");
        assert_eq!(got[0].numeric.unwrap(), -100);
}

#[test]
fn test_integer_i64_hex() {
    let src = "0xFF:i64";
    let mut lexer = sls::lexer::Lexer::new(src);
    let mut got = vec![];
    loop {
        let t = lexer.next_token();
        if t.ttype == sls::lexer::TokenType::Eof { break; }
        got.push(t);
    }

    assert_eq!(got.len(), 1usize, "token count mismatch");
    assert_eq!(got[0].ttype, sls::lexer::TokenType::Int);
        assert!(got[0].numeric.is_some(), "expected numeric value");
        assert_eq!(got[0].numeric.unwrap(), 255);
}

#[test]
fn test_integer_i64_binary() {
    let src = "0b1111:i64";
    let mut lexer = sls::lexer::Lexer::new(src);
    let mut got = vec![];
    loop {
        let t = lexer.next_token();
        if t.ttype == sls::lexer::TokenType::Eof { break; }
        got.push(t);
    }

    assert_eq!(got.len(), 1usize, "token count mismatch");
    assert_eq!(got[0].ttype, sls::lexer::TokenType::Int);
        assert!(got[0].numeric.is_some(), "expected numeric value");
        assert_eq!(got[0].numeric.unwrap(), 15);
}

#[test]
fn test_integer_i64_octal() {
    let src = "0o77:i64";
    let mut lexer = sls::lexer::Lexer::new(src);
    let mut got = vec![];
    loop {
        let t = lexer.next_token();
        if t.ttype == sls::lexer::TokenType::Eof { break; }
        got.push(t);
    }

    assert_eq!(got.len(), 1usize, "token count mismatch");
    assert_eq!(got[0].ttype, sls::lexer::TokenType::Int);
        assert!(got[0].numeric.is_some(), "expected numeric value");
        assert_eq!(got[0].numeric.unwrap(), 63);
}

#[test]
fn test_integer_i64_max_value() {
    let src = "9223372036854775807:i64";
    let mut lexer = sls::lexer::Lexer::new(src);
    let mut got = vec![];
    loop {
        let t = lexer.next_token();
        if t.ttype == sls::lexer::TokenType::Eof { break; }
        got.push(t);
    }

    assert_eq!(got.len(), 1usize, "token count mismatch");
    assert_eq!(got[0].ttype, sls::lexer::TokenType::Int);
        assert!(got[0].numeric.is_some(), "expected numeric value");
        assert_eq!(got[0].numeric.unwrap(), 9223372036854775807);
}

#[test]
fn test_integer_i64_min_value() {
    let src = "-9223372036854775808:i64";
    let mut lexer = sls::lexer::Lexer::new(src);
    let mut got = vec![];
    loop {
        let t = lexer.next_token();
        if t.ttype == sls::lexer::TokenType::Eof { break; }
        got.push(t);
    }

    assert_eq!(got.len(), 1usize, "token count mismatch");
    assert_eq!(got[0].ttype, sls::lexer::TokenType::Int);
        assert!(got[0].numeric.is_some(), "expected numeric value");
        assert_eq!(got[0].numeric.unwrap(), INT64_MIN);
}

#[test]
fn test_integer_i64_overflow() {
    let src = "9223372036854775808:i64";
    let mut lexer = sls::lexer::Lexer::new(src);
    let mut got = vec![];
    loop {
        let t = lexer.next_token();
        if t.ttype == sls::lexer::TokenType::Eof { break; }
        got.push(t);
    }

    assert_eq!(got.len(), 1usize, "token count mismatch");
    assert_eq!(got[0].ttype, sls::lexer::TokenType::Illegal);
}

#[test]
fn test_integer_i64_underflow() {
    let src = "-9223372036854775809:i64";
    let mut lexer = sls::lexer::Lexer::new(src);
    let mut got = vec![];
    loop {
        let t = lexer.next_token();
        if t.ttype == sls::lexer::TokenType::Eof { break; }
        got.push(t);
    }

    assert_eq!(got.len(), 1usize, "token count mismatch");
    assert_eq!(got[0].ttype, sls::lexer::TokenType::Illegal);
}

#[test]
fn test_integer_i64_with_underscores() {
    let src = "1_000_000:i64";
    let mut lexer = sls::lexer::Lexer::new(src);
    let mut got = vec![];
    loop {
        let t = lexer.next_token();
        if t.ttype == sls::lexer::TokenType::Eof { break; }
        got.push(t);
    }

    assert_eq!(got.len(), 1usize, "token count mismatch");
    assert_eq!(got[0].ttype, sls::lexer::TokenType::Int);
        assert!(got[0].numeric.is_some(), "expected numeric value");
        assert_eq!(got[0].numeric.unwrap(), 1000000);
}

#[test]
fn test_integer_u8_decimal_positive() {
    let src = "42:u8";
    let mut lexer = sls::lexer::Lexer::new(src);
    let mut got = vec![];
    loop {
        let t = lexer.next_token();
        if t.ttype == sls::lexer::TokenType::Eof { break; }
        got.push(t);
    }

    assert_eq!(got.len(), 1usize, "token count mismatch");
    assert_eq!(got[0].ttype, sls::lexer::TokenType::Int);
        assert!(got[0].numeric.is_some(), "expected numeric value");
        assert_eq!(got[0].numeric.unwrap(), 42);
}

#[test]
fn test_integer_u8_zero() {
    let src = "0:u8";
    let mut lexer = sls::lexer::Lexer::new(src);
    let mut got = vec![];
    loop {
        let t = lexer.next_token();
        if t.ttype == sls::lexer::TokenType::Eof { break; }
        got.push(t);
    }

    assert_eq!(got.len(), 1usize, "token count mismatch");
    assert_eq!(got[0].ttype, sls::lexer::TokenType::Int);
        assert!(got[0].numeric.is_some(), "expected numeric value");
        assert_eq!(got[0].numeric.unwrap(), 0);
}

#[test]
fn test_integer_u8_hex() {
    let src = "0xFF:u8";
    let mut lexer = sls::lexer::Lexer::new(src);
    let mut got = vec![];
    loop {
        let t = lexer.next_token();
        if t.ttype == sls::lexer::TokenType::Eof { break; }
        got.push(t);
    }

    assert_eq!(got.len(), 1usize, "token count mismatch");
    assert_eq!(got[0].ttype, sls::lexer::TokenType::Int);
        assert!(got[0].numeric.is_some(), "expected numeric value");
        assert_eq!(got[0].numeric.unwrap(), 255);
}

#[test]
fn test_integer_u8_binary() {
    let src = "0b1111:u8";
    let mut lexer = sls::lexer::Lexer::new(src);
    let mut got = vec![];
    loop {
        let t = lexer.next_token();
        if t.ttype == sls::lexer::TokenType::Eof { break; }
        got.push(t);
    }

    assert_eq!(got.len(), 1usize, "token count mismatch");
    assert_eq!(got[0].ttype, sls::lexer::TokenType::Int);
        assert!(got[0].numeric.is_some(), "expected numeric value");
        assert_eq!(got[0].numeric.unwrap(), 15);
}

#[test]
fn test_integer_u8_octal() {
    let src = "0o77:u8";
    let mut lexer = sls::lexer::Lexer::new(src);
    let mut got = vec![];
    loop {
        let t = lexer.next_token();
        if t.ttype == sls::lexer::TokenType::Eof { break; }
        got.push(t);
    }

    assert_eq!(got.len(), 1usize, "token count mismatch");
    assert_eq!(got[0].ttype, sls::lexer::TokenType::Int);
        assert!(got[0].numeric.is_some(), "expected numeric value");
        assert_eq!(got[0].numeric.unwrap(), 63);
}

#[test]
fn test_integer_u8_max_value() {
    let src = "255:u8";
    let mut lexer = sls::lexer::Lexer::new(src);
    let mut got = vec![];
    loop {
        let t = lexer.next_token();
        if t.ttype == sls::lexer::TokenType::Eof { break; }
        got.push(t);
    }

    assert_eq!(got.len(), 1usize, "token count mismatch");
    assert_eq!(got[0].ttype, sls::lexer::TokenType::Int);
        assert!(got[0].numeric.is_some(), "expected numeric value");
        assert_eq!(got[0].numeric.unwrap(), 255);
}

#[test]
fn test_integer_u8_min_value() {
    let src = "0:u8";
    let mut lexer = sls::lexer::Lexer::new(src);
    let mut got = vec![];
    loop {
        let t = lexer.next_token();
        if t.ttype == sls::lexer::TokenType::Eof { break; }
        got.push(t);
    }

    assert_eq!(got.len(), 1usize, "token count mismatch");
    assert_eq!(got[0].ttype, sls::lexer::TokenType::Int);
        assert!(got[0].numeric.is_some(), "expected numeric value");
        assert_eq!(got[0].numeric.unwrap(), 0);
}

#[test]
fn test_integer_u8_overflow() {
    let src = "256:u8";
    let mut lexer = sls::lexer::Lexer::new(src);
    let mut got = vec![];
    loop {
        let t = lexer.next_token();
        if t.ttype == sls::lexer::TokenType::Eof { break; }
        got.push(t);
    }

    assert_eq!(got.len(), 1usize, "token count mismatch");
    assert_eq!(got[0].ttype, sls::lexer::TokenType::Illegal);
}

#[test]
fn test_integer_u8_underflow() {
    let src = "-1:u8";
    let mut lexer = sls::lexer::Lexer::new(src);
    let mut got = vec![];
    loop {
        let t = lexer.next_token();
        if t.ttype == sls::lexer::TokenType::Eof { break; }
        got.push(t);
    }

    assert_eq!(got.len(), 1usize, "token count mismatch");
    assert_eq!(got[0].ttype, sls::lexer::TokenType::Illegal);
}

#[test]
fn test_integer_u16_decimal_positive() {
    let src = "42:u16";
    let mut lexer = sls::lexer::Lexer::new(src);
    let mut got = vec![];
    loop {
        let t = lexer.next_token();
        if t.ttype == sls::lexer::TokenType::Eof { break; }
        got.push(t);
    }

    assert_eq!(got.len(), 1usize, "token count mismatch");
    assert_eq!(got[0].ttype, sls::lexer::TokenType::Int);
        assert!(got[0].numeric.is_some(), "expected numeric value");
        assert_eq!(got[0].numeric.unwrap(), 42);
}

#[test]
fn test_integer_u16_zero() {
    let src = "0:u16";
    let mut lexer = sls::lexer::Lexer::new(src);
    let mut got = vec![];
    loop {
        let t = lexer.next_token();
        if t.ttype == sls::lexer::TokenType::Eof { break; }
        got.push(t);
    }

    assert_eq!(got.len(), 1usize, "token count mismatch");
    assert_eq!(got[0].ttype, sls::lexer::TokenType::Int);
        assert!(got[0].numeric.is_some(), "expected numeric value");
        assert_eq!(got[0].numeric.unwrap(), 0);
}

#[test]
fn test_integer_u16_hex() {
    let src = "0xFF:u16";
    let mut lexer = sls::lexer::Lexer::new(src);
    let mut got = vec![];
    loop {
        let t = lexer.next_token();
        if t.ttype == sls::lexer::TokenType::Eof { break; }
        got.push(t);
    }

    assert_eq!(got.len(), 1usize, "token count mismatch");
    assert_eq!(got[0].ttype, sls::lexer::TokenType::Int);
        assert!(got[0].numeric.is_some(), "expected numeric value");
        assert_eq!(got[0].numeric.unwrap(), 255);
}

#[test]
fn test_integer_u16_binary() {
    let src = "0b1111:u16";
    let mut lexer = sls::lexer::Lexer::new(src);
    let mut got = vec![];
    loop {
        let t = lexer.next_token();
        if t.ttype == sls::lexer::TokenType::Eof { break; }
        got.push(t);
    }

    assert_eq!(got.len(), 1usize, "token count mismatch");
    assert_eq!(got[0].ttype, sls::lexer::TokenType::Int);
        assert!(got[0].numeric.is_some(), "expected numeric value");
        assert_eq!(got[0].numeric.unwrap(), 15);
}

#[test]
fn test_integer_u16_octal() {
    let src = "0o77:u16";
    let mut lexer = sls::lexer::Lexer::new(src);
    let mut got = vec![];
    loop {
        let t = lexer.next_token();
        if t.ttype == sls::lexer::TokenType::Eof { break; }
        got.push(t);
    }

    assert_eq!(got.len(), 1usize, "token count mismatch");
    assert_eq!(got[0].ttype, sls::lexer::TokenType::Int);
        assert!(got[0].numeric.is_some(), "expected numeric value");
        assert_eq!(got[0].numeric.unwrap(), 63);
}

#[test]
fn test_integer_u16_max_value() {
    let src = "65535:u16";
    let mut lexer = sls::lexer::Lexer::new(src);
    let mut got = vec![];
    loop {
        let t = lexer.next_token();
        if t.ttype == sls::lexer::TokenType::Eof { break; }
        got.push(t);
    }

    assert_eq!(got.len(), 1usize, "token count mismatch");
    assert_eq!(got[0].ttype, sls::lexer::TokenType::Int);
        assert!(got[0].numeric.is_some(), "expected numeric value");
        assert_eq!(got[0].numeric.unwrap(), 65535);
}

#[test]
fn test_integer_u16_min_value() {
    let src = "0:u16";
    let mut lexer = sls::lexer::Lexer::new(src);
    let mut got = vec![];
    loop {
        let t = lexer.next_token();
        if t.ttype == sls::lexer::TokenType::Eof { break; }
        got.push(t);
    }

    assert_eq!(got.len(), 1usize, "token count mismatch");
    assert_eq!(got[0].ttype, sls::lexer::TokenType::Int);
        assert!(got[0].numeric.is_some(), "expected numeric value");
        assert_eq!(got[0].numeric.unwrap(), 0);
}

#[test]
fn test_integer_u16_overflow() {
    let src = "65536:u16";
    let mut lexer = sls::lexer::Lexer::new(src);
    let mut got = vec![];
    loop {
        let t = lexer.next_token();
        if t.ttype == sls::lexer::TokenType::Eof { break; }
        got.push(t);
    }

    assert_eq!(got.len(), 1usize, "token count mismatch");
    assert_eq!(got[0].ttype, sls::lexer::TokenType::Illegal);
}

#[test]
fn test_integer_u16_underflow() {
    let src = "-1:u16";
    let mut lexer = sls::lexer::Lexer::new(src);
    let mut got = vec![];
    loop {
        let t = lexer.next_token();
        if t.ttype == sls::lexer::TokenType::Eof { break; }
        got.push(t);
    }

    assert_eq!(got.len(), 1usize, "token count mismatch");
    assert_eq!(got[0].ttype, sls::lexer::TokenType::Illegal);
}

#[test]
fn test_integer_u32_decimal_positive() {
    let src = "42:u32";
    let mut lexer = sls::lexer::Lexer::new(src);
    let mut got = vec![];
    loop {
        let t = lexer.next_token();
        if t.ttype == sls::lexer::TokenType::Eof { break; }
        got.push(t);
    }

    assert_eq!(got.len(), 1usize, "token count mismatch");
    assert_eq!(got[0].ttype, sls::lexer::TokenType::Int);
        assert!(got[0].numeric.is_some(), "expected numeric value");
        assert_eq!(got[0].numeric.unwrap(), 42);
}

#[test]
fn test_integer_u32_zero() {
    let src = "0:u32";
    let mut lexer = sls::lexer::Lexer::new(src);
    let mut got = vec![];
    loop {
        let t = lexer.next_token();
        if t.ttype == sls::lexer::TokenType::Eof { break; }
        got.push(t);
    }

    assert_eq!(got.len(), 1usize, "token count mismatch");
    assert_eq!(got[0].ttype, sls::lexer::TokenType::Int);
        assert!(got[0].numeric.is_some(), "expected numeric value");
        assert_eq!(got[0].numeric.unwrap(), 0);
}

#[test]
fn test_integer_u32_hex() {
    let src = "0xFF:u32";
    let mut lexer = sls::lexer::Lexer::new(src);
    let mut got = vec![];
    loop {
        let t = lexer.next_token();
        if t.ttype == sls::lexer::TokenType::Eof { break; }
        got.push(t);
    }

    assert_eq!(got.len(), 1usize, "token count mismatch");
    assert_eq!(got[0].ttype, sls::lexer::TokenType::Int);
        assert!(got[0].numeric.is_some(), "expected numeric value");
        assert_eq!(got[0].numeric.unwrap(), 255);
}

#[test]
fn test_integer_u32_binary() {
    let src = "0b1111:u32";
    let mut lexer = sls::lexer::Lexer::new(src);
    let mut got = vec![];
    loop {
        let t = lexer.next_token();
        if t.ttype == sls::lexer::TokenType::Eof { break; }
        got.push(t);
    }

    assert_eq!(got.len(), 1usize, "token count mismatch");
    assert_eq!(got[0].ttype, sls::lexer::TokenType::Int);
        assert!(got[0].numeric.is_some(), "expected numeric value");
        assert_eq!(got[0].numeric.unwrap(), 15);
}

#[test]
fn test_integer_u32_octal() {
    let src = "0o77:u32";
    let mut lexer = sls::lexer::Lexer::new(src);
    let mut got = vec![];
    loop {
        let t = lexer.next_token();
        if t.ttype == sls::lexer::TokenType::Eof { break; }
        got.push(t);
    }

    assert_eq!(got.len(), 1usize, "token count mismatch");
    assert_eq!(got[0].ttype, sls::lexer::TokenType::Int);
        assert!(got[0].numeric.is_some(), "expected numeric value");
        assert_eq!(got[0].numeric.unwrap(), 63);
}

#[test]
fn test_integer_u32_max_value() {
    let src = "4294967295:u32";
    let mut lexer = sls::lexer::Lexer::new(src);
    let mut got = vec![];
    loop {
        let t = lexer.next_token();
        if t.ttype == sls::lexer::TokenType::Eof { break; }
        got.push(t);
    }

    assert_eq!(got.len(), 1usize, "token count mismatch");
    assert_eq!(got[0].ttype, sls::lexer::TokenType::Int);
        assert!(got[0].numeric.is_some(), "expected numeric value");
        assert_eq!(got[0].numeric.unwrap(), 4294967295);
}

#[test]
fn test_integer_u32_min_value() {
    let src = "0:u32";
    let mut lexer = sls::lexer::Lexer::new(src);
    let mut got = vec![];
    loop {
        let t = lexer.next_token();
        if t.ttype == sls::lexer::TokenType::Eof { break; }
        got.push(t);
    }

    assert_eq!(got.len(), 1usize, "token count mismatch");
    assert_eq!(got[0].ttype, sls::lexer::TokenType::Int);
        assert!(got[0].numeric.is_some(), "expected numeric value");
        assert_eq!(got[0].numeric.unwrap(), 0);
}

#[test]
fn test_integer_u32_overflow() {
    let src = "4294967296:u32";
    let mut lexer = sls::lexer::Lexer::new(src);
    let mut got = vec![];
    loop {
        let t = lexer.next_token();
        if t.ttype == sls::lexer::TokenType::Eof { break; }
        got.push(t);
    }

    assert_eq!(got.len(), 1usize, "token count mismatch");
    assert_eq!(got[0].ttype, sls::lexer::TokenType::Illegal);
}

#[test]
fn test_integer_u32_underflow() {
    let src = "-1:u32";
    let mut lexer = sls::lexer::Lexer::new(src);
    let mut got = vec![];
    loop {
        let t = lexer.next_token();
        if t.ttype == sls::lexer::TokenType::Eof { break; }
        got.push(t);
    }

    assert_eq!(got.len(), 1usize, "token count mismatch");
    assert_eq!(got[0].ttype, sls::lexer::TokenType::Illegal);
}

#[test]
fn test_integer_u32_with_underscores() {
    let src = "1_000_000:u32";
    let mut lexer = sls::lexer::Lexer::new(src);
    let mut got = vec![];
    loop {
        let t = lexer.next_token();
        if t.ttype == sls::lexer::TokenType::Eof { break; }
        got.push(t);
    }

    assert_eq!(got.len(), 1usize, "token count mismatch");
    assert_eq!(got[0].ttype, sls::lexer::TokenType::Int);
        assert!(got[0].numeric.is_some(), "expected numeric value");
        assert_eq!(got[0].numeric.unwrap(), 1000000);
}

#[test]
fn test_integer_u64_decimal_positive() {
    let src = "42:u64";
    let mut lexer = sls::lexer::Lexer::new(src);
    let mut got = vec![];
    loop {
        let t = lexer.next_token();
        if t.ttype == sls::lexer::TokenType::Eof { break; }
        got.push(t);
    }

    assert_eq!(got.len(), 1usize, "token count mismatch");
    assert_eq!(got[0].ttype, sls::lexer::TokenType::Int);
        assert!(got[0].numeric.is_some(), "expected numeric value");
        assert_eq!(got[0].numeric.unwrap(), 42);
}

#[test]
fn test_integer_u64_zero() {
    let src = "0:u64";
    let mut lexer = sls::lexer::Lexer::new(src);
    let mut got = vec![];
    loop {
        let t = lexer.next_token();
        if t.ttype == sls::lexer::TokenType::Eof { break; }
        got.push(t);
    }

    assert_eq!(got.len(), 1usize, "token count mismatch");
    assert_eq!(got[0].ttype, sls::lexer::TokenType::Int);
        assert!(got[0].numeric.is_some(), "expected numeric value");
        assert_eq!(got[0].numeric.unwrap(), 0);
}

#[test]
fn test_integer_u64_hex() {
    let src = "0xFF:u64";
    let mut lexer = sls::lexer::Lexer::new(src);
    let mut got = vec![];
    loop {
        let t = lexer.next_token();
        if t.ttype == sls::lexer::TokenType::Eof { break; }
        got.push(t);
    }

    assert_eq!(got.len(), 1usize, "token count mismatch");
    assert_eq!(got[0].ttype, sls::lexer::TokenType::Int);
        assert!(got[0].numeric.is_some(), "expected numeric value");
        assert_eq!(got[0].numeric.unwrap(), 255);
}

#[test]
fn test_integer_u64_binary() {
    let src = "0b1111:u64";
    let mut lexer = sls::lexer::Lexer::new(src);
    let mut got = vec![];
    loop {
        let t = lexer.next_token();
        if t.ttype == sls::lexer::TokenType::Eof { break; }
        got.push(t);
    }

    assert_eq!(got.len(), 1usize, "token count mismatch");
    assert_eq!(got[0].ttype, sls::lexer::TokenType::Int);
        assert!(got[0].numeric.is_some(), "expected numeric value");
        assert_eq!(got[0].numeric.unwrap(), 15);
}

#[test]
fn test_integer_u64_octal() {
    let src = "0o77:u64";
    let mut lexer = sls::lexer::Lexer::new(src);
    let mut got = vec![];
    loop {
        let t = lexer.next_token();
        if t.ttype == sls::lexer::TokenType::Eof { break; }
        got.push(t);
    }

    assert_eq!(got.len(), 1usize, "token count mismatch");
    assert_eq!(got[0].ttype, sls::lexer::TokenType::Int);
        assert!(got[0].numeric.is_some(), "expected numeric value");
        assert_eq!(got[0].numeric.unwrap(), 63);
}

#[test]
fn test_integer_u64_max_value() {
    let src = "18446744073709551615:u64";
    let mut lexer = sls::lexer::Lexer::new(src);
    let mut got = vec![];
    loop {
        let t = lexer.next_token();
        if t.ttype == sls::lexer::TokenType::Eof { break; }
        got.push(t);
    }

    assert_eq!(got.len(), 1usize, "token count mismatch");
    assert_eq!(got[0].ttype, sls::lexer::TokenType::Int);
        assert!(got[0].numeric.is_some(), "expected numeric value");
        assert_eq!(got[0].numeric.unwrap(), UINT64_MAX);
}

#[test]
fn test_integer_u64_min_value() {
    let src = "0:u64";
    let mut lexer = sls::lexer::Lexer::new(src);
    let mut got = vec![];
    loop {
        let t = lexer.next_token();
        if t.ttype == sls::lexer::TokenType::Eof { break; }
        got.push(t);
    }

    assert_eq!(got.len(), 1usize, "token count mismatch");
    assert_eq!(got[0].ttype, sls::lexer::TokenType::Int);
        assert!(got[0].numeric.is_some(), "expected numeric value");
        assert_eq!(got[0].numeric.unwrap(), 0);
}

#[test]
fn test_integer_u64_overflow() {
    let src = "18446744073709551616:u64";
    let mut lexer = sls::lexer::Lexer::new(src);
    let mut got = vec![];
    loop {
        let t = lexer.next_token();
        if t.ttype == sls::lexer::TokenType::Eof { break; }
        got.push(t);
    }

    assert_eq!(got.len(), 1usize, "token count mismatch");
    assert_eq!(got[0].ttype, sls::lexer::TokenType::Illegal);
}

#[test]
fn test_integer_u64_underflow() {
    let src = "-1:u64";
    let mut lexer = sls::lexer::Lexer::new(src);
    let mut got = vec![];
    loop {
        let t = lexer.next_token();
        if t.ttype == sls::lexer::TokenType::Eof { break; }
        got.push(t);
    }

    assert_eq!(got.len(), 1usize, "token count mismatch");
    assert_eq!(got[0].ttype, sls::lexer::TokenType::Illegal);
}

#[test]
fn test_integer_u64_with_underscores() {
    let src = "1_000_000:u64";
    let mut lexer = sls::lexer::Lexer::new(src);
    let mut got = vec![];
    loop {
        let t = lexer.next_token();
        if t.ttype == sls::lexer::TokenType::Eof { break; }
        got.push(t);
    }

    assert_eq!(got.len(), 1usize, "token count mismatch");
    assert_eq!(got[0].ttype, sls::lexer::TokenType::Int);
        assert!(got[0].numeric.is_some(), "expected numeric value");
        assert_eq!(got[0].numeric.unwrap(), 1000000);
}

#[test]
fn test_integer_i8_hex_max() {
    let src = "0x7F:i8";
    let mut lexer = sls::lexer::Lexer::new(src);
    let mut got = vec![];
    loop {
        let t = lexer.next_token();
        if t.ttype == sls::lexer::TokenType::Eof { break; }
        got.push(t);
    }

    assert_eq!(got.len(), 1usize, "token count mismatch");
    assert_eq!(got[0].ttype, sls::lexer::TokenType::Int);
        assert!(got[0].numeric.is_some(), "expected numeric value");
        assert_eq!(got[0].numeric.unwrap(), 127);
}

#[test]
fn test_integer_i8_binary_max() {
    let src = "0b01111111:i8";
    let mut lexer = sls::lexer::Lexer::new(src);
    let mut got = vec![];
    loop {
        let t = lexer.next_token();
        if t.ttype == sls::lexer::TokenType::Eof { break; }
        got.push(t);
    }

    assert_eq!(got.len(), 1usize, "token count mismatch");
    assert_eq!(got[0].ttype, sls::lexer::TokenType::Int);
        assert!(got[0].numeric.is_some(), "expected numeric value");
        assert_eq!(got[0].numeric.unwrap(), 127);
}

#[test]
fn test_integer_i8_octal_max() {
    let src = "0o177:i8";
    let mut lexer = sls::lexer::Lexer::new(src);
    let mut got = vec![];
    loop {
        let t = lexer.next_token();
        if t.ttype == sls::lexer::TokenType::Eof { break; }
        got.push(t);
    }

    assert_eq!(got.len(), 1usize, "token count mismatch");
    assert_eq!(got[0].ttype, sls::lexer::TokenType::Int);
        assert!(got[0].numeric.is_some(), "expected numeric value");
        assert_eq!(got[0].numeric.unwrap(), 127);
}

#[test]
fn test_integer_i8_negative_hex() {
    let src = "-0x80:i8";
    let mut lexer = sls::lexer::Lexer::new(src);
    let mut got = vec![];
    loop {
        let t = lexer.next_token();
        if t.ttype == sls::lexer::TokenType::Eof { break; }
        got.push(t);
    }

    assert_eq!(got.len(), 1usize, "token count mismatch");
    assert_eq!(got[0].ttype, sls::lexer::TokenType::Int);
        assert!(got[0].numeric.is_some(), "expected numeric value");
        assert_eq!(got[0].numeric.unwrap(), -128);
}

#[test]
fn test_integer_u8_hex_max() {
    let src = "0xFF:u8";
    let mut lexer = sls::lexer::Lexer::new(src);
    let mut got = vec![];
    loop {
        let t = lexer.next_token();
        if t.ttype == sls::lexer::TokenType::Eof { break; }
        got.push(t);
    }

    assert_eq!(got.len(), 1usize, "token count mismatch");
    assert_eq!(got[0].ttype, sls::lexer::TokenType::Int);
        assert!(got[0].numeric.is_some(), "expected numeric value");
        assert_eq!(got[0].numeric.unwrap(), 255);
}

#[test]
fn test_integer_u8_binary_max() {
    let src = "0b11111111:u8";
    let mut lexer = sls::lexer::Lexer::new(src);
    let mut got = vec![];
    loop {
        let t = lexer.next_token();
        if t.ttype == sls::lexer::TokenType::Eof { break; }
        got.push(t);
    }

    assert_eq!(got.len(), 1usize, "token count mismatch");
    assert_eq!(got[0].ttype, sls::lexer::TokenType::Int);
        assert!(got[0].numeric.is_some(), "expected numeric value");
        assert_eq!(got[0].numeric.unwrap(), 255);
}

#[test]
fn test_integer_u8_octal_max() {
    let src = "0o377:u8";
    let mut lexer = sls::lexer::Lexer::new(src);
    let mut got = vec![];
    loop {
        let t = lexer.next_token();
        if t.ttype == sls::lexer::TokenType::Eof { break; }
        got.push(t);
    }

    assert_eq!(got.len(), 1usize, "token count mismatch");
    assert_eq!(got[0].ttype, sls::lexer::TokenType::Int);
        assert!(got[0].numeric.is_some(), "expected numeric value");
        assert_eq!(got[0].numeric.unwrap(), 255);
}

#[test]
fn test_integer_i16_hex_sample() {
    let src = "0x1234:i16";
    let mut lexer = sls::lexer::Lexer::new(src);
    let mut got = vec![];
    loop {
        let t = lexer.next_token();
        if t.ttype == sls::lexer::TokenType::Eof { break; }
        got.push(t);
    }

    assert_eq!(got.len(), 1usize, "token count mismatch");
    assert_eq!(got[0].ttype, sls::lexer::TokenType::Int);
        assert!(got[0].numeric.is_some(), "expected numeric value");
        assert_eq!(got[0].numeric.unwrap(), 4660);
}

#[test]
fn test_integer_i16_binary_sample() {
    let src = "0b1111111100000000:i16";
    let mut lexer = sls::lexer::Lexer::new(src);
    let mut got = vec![];
    loop {
        let t = lexer.next_token();
        if t.ttype == sls::lexer::TokenType::Eof { break; }
        got.push(t);
    }

    assert_eq!(got.len(), 1usize, "token count mismatch");
    assert_eq!(got[0].ttype, sls::lexer::TokenType::Int);
        assert!(got[0].numeric.is_some(), "expected numeric value");
        assert_eq!(got[0].numeric.unwrap(), -256);
}

#[test]
fn test_integer_i16_octal_sample() {
    let src = "0o1234:i16";
    let mut lexer = sls::lexer::Lexer::new(src);
    let mut got = vec![];
    loop {
        let t = lexer.next_token();
        if t.ttype == sls::lexer::TokenType::Eof { break; }
        got.push(t);
    }

    assert_eq!(got.len(), 1usize, "token count mismatch");
    assert_eq!(got[0].ttype, sls::lexer::TokenType::Int);
        assert!(got[0].numeric.is_some(), "expected numeric value");
        assert_eq!(got[0].numeric.unwrap(), 668);
}

#[test]
fn test_integer_u16_hex_max() {
    let src = "0xFFFF:u16";
    let mut lexer = sls::lexer::Lexer::new(src);
    let mut got = vec![];
    loop {
        let t = lexer.next_token();
        if t.ttype == sls::lexer::TokenType::Eof { break; }
        got.push(t);
    }

    assert_eq!(got.len(), 1usize, "token count mismatch");
    assert_eq!(got[0].ttype, sls::lexer::TokenType::Int);
        assert!(got[0].numeric.is_some(), "expected numeric value");
        assert_eq!(got[0].numeric.unwrap(), 65535);
}

#[test]
fn test_integer_u16_binary_max() {
    let src = "0b1111111111111111:u16";
    let mut lexer = sls::lexer::Lexer::new(src);
    let mut got = vec![];
    loop {
        let t = lexer.next_token();
        if t.ttype == sls::lexer::TokenType::Eof { break; }
        got.push(t);
    }

    assert_eq!(got.len(), 1usize, "token count mismatch");
    assert_eq!(got[0].ttype, sls::lexer::TokenType::Int);
        assert!(got[0].numeric.is_some(), "expected numeric value");
        assert_eq!(got[0].numeric.unwrap(), 65535);
}

#[test]
fn test_integer_u16_octal_max() {
    let src = "0o177777:u16";
    let mut lexer = sls::lexer::Lexer::new(src);
    let mut got = vec![];
    loop {
        let t = lexer.next_token();
        if t.ttype == sls::lexer::TokenType::Eof { break; }
        got.push(t);
    }

    assert_eq!(got.len(), 1usize, "token count mismatch");
    assert_eq!(got[0].ttype, sls::lexer::TokenType::Int);
        assert!(got[0].numeric.is_some(), "expected numeric value");
        assert_eq!(got[0].numeric.unwrap(), 65535);
}

#[test]
fn test_integer_u16_decimal_mid() {
    let src = "50000:u16";
    let mut lexer = sls::lexer::Lexer::new(src);
    let mut got = vec![];
    loop {
        let t = lexer.next_token();
        if t.ttype == sls::lexer::TokenType::Eof { break; }
        got.push(t);
    }

    assert_eq!(got.len(), 1usize, "token count mismatch");
    assert_eq!(got[0].ttype, sls::lexer::TokenType::Int);
        assert!(got[0].numeric.is_some(), "expected numeric value");
        assert_eq!(got[0].numeric.unwrap(), 50000);
}

#[test]
fn test_integer_i32_hex_sample() {
    let src = "0xABCD:i32";
    let mut lexer = sls::lexer::Lexer::new(src);
    let mut got = vec![];
    loop {
        let t = lexer.next_token();
        if t.ttype == sls::lexer::TokenType::Eof { break; }
        got.push(t);
    }

    assert_eq!(got.len(), 1usize, "token count mismatch");
    assert_eq!(got[0].ttype, sls::lexer::TokenType::Int);
        assert!(got[0].numeric.is_some(), "expected numeric value");
        assert_eq!(got[0].numeric.unwrap(), 43981);
}

#[test]
fn test_integer_i32_binary_sample() {
    let src = "0b11110000:i32";
    let mut lexer = sls::lexer::Lexer::new(src);
    let mut got = vec![];
    loop {
        let t = lexer.next_token();
        if t.ttype == sls::lexer::TokenType::Eof { break; }
        got.push(t);
    }

    assert_eq!(got.len(), 1usize, "token count mismatch");
    assert_eq!(got[0].ttype, sls::lexer::TokenType::Int);
        assert!(got[0].numeric.is_some(), "expected numeric value");
        assert_eq!(got[0].numeric.unwrap(), 240);
}

#[test]
fn test_integer_u32_hex_max() {
    let src = "0xFFFFFFFF:u32";
    let mut lexer = sls::lexer::Lexer::new(src);
    let mut got = vec![];
    loop {
        let t = lexer.next_token();
        if t.ttype == sls::lexer::TokenType::Eof { break; }
        got.push(t);
    }

    assert_eq!(got.len(), 1usize, "token count mismatch");
    assert_eq!(got[0].ttype, sls::lexer::TokenType::Int);
        assert!(got[0].numeric.is_some(), "expected numeric value");
        assert_eq!(got[0].numeric.unwrap(), 4294967295);
}

#[test]
fn test_integer_u32_binary_sample() {
    let src = "0b11111111000000001111111100000000:u32";
    let mut lexer = sls::lexer::Lexer::new(src);
    let mut got = vec![];
    loop {
        let t = lexer.next_token();
        if t.ttype == sls::lexer::TokenType::Eof { break; }
        got.push(t);
    }

    assert_eq!(got.len(), 1usize, "token count mismatch");
    assert_eq!(got[0].ttype, sls::lexer::TokenType::Int);
        assert!(got[0].numeric.is_some(), "expected numeric value");
        assert_eq!(got[0].numeric.unwrap(), 4278255360);
}

#[test]
fn test_integer_u32_octal_max() {
    let src = "0o37777777777:u32";
    let mut lexer = sls::lexer::Lexer::new(src);
    let mut got = vec![];
    loop {
        let t = lexer.next_token();
        if t.ttype == sls::lexer::TokenType::Eof { break; }
        got.push(t);
    }

    assert_eq!(got.len(), 1usize, "token count mismatch");
    assert_eq!(got[0].ttype, sls::lexer::TokenType::Int);
        assert!(got[0].numeric.is_some(), "expected numeric value");
        assert_eq!(got[0].numeric.unwrap(), 4294967295);
}

#[test]
fn test_integer_u32_decimal_mid() {
    let src = "1000000:u32";
    let mut lexer = sls::lexer::Lexer::new(src);
    let mut got = vec![];
    loop {
        let t = lexer.next_token();
        if t.ttype == sls::lexer::TokenType::Eof { break; }
        got.push(t);
    }

    assert_eq!(got.len(), 1usize, "token count mismatch");
    assert_eq!(got[0].ttype, sls::lexer::TokenType::Int);
        assert!(got[0].numeric.is_some(), "expected numeric value");
        assert_eq!(got[0].numeric.unwrap(), 1000000);
}

#[test]
fn test_integer_i64_decimal_positive_42() {
    let src = "42:i64";
    let mut lexer = sls::lexer::Lexer::new(src);
    let mut got = vec![];
    loop {
        let t = lexer.next_token();
        if t.ttype == sls::lexer::TokenType::Eof { break; }
        got.push(t);
    }

    assert_eq!(got.len(), 1usize, "token count mismatch");
    assert_eq!(got[0].ttype, sls::lexer::TokenType::Int);
        assert!(got[0].numeric.is_some(), "expected numeric value");
        assert_eq!(got[0].numeric.unwrap(), 42);
}

#[test]
fn test_integer_i64_hex_0xff() {
    let src = "0xFF:i64";
    let mut lexer = sls::lexer::Lexer::new(src);
    let mut got = vec![];
    loop {
        let t = lexer.next_token();
        if t.ttype == sls::lexer::TokenType::Eof { break; }
        got.push(t);
    }

    assert_eq!(got.len(), 1usize, "token count mismatch");
    assert_eq!(got[0].ttype, sls::lexer::TokenType::Int);
        assert!(got[0].numeric.is_some(), "expected numeric value");
        assert_eq!(got[0].numeric.unwrap(), 255);
}

#[test]
fn test_integer_i64_binary_0b1010() {
    let src = "0b1010:i64";
    let mut lexer = sls::lexer::Lexer::new(src);
    let mut got = vec![];
    loop {
        let t = lexer.next_token();
        if t.ttype == sls::lexer::TokenType::Eof { break; }
        got.push(t);
    }

    assert_eq!(got.len(), 1usize, "token count mismatch");
    assert_eq!(got[0].ttype, sls::lexer::TokenType::Int);
        assert!(got[0].numeric.is_some(), "expected numeric value");
        assert_eq!(got[0].numeric.unwrap(), 10);
}

#[test]
fn test_integer_i64_octal_0o755() {
    let src = "0o755:i64";
    let mut lexer = sls::lexer::Lexer::new(src);
    let mut got = vec![];
    loop {
        let t = lexer.next_token();
        if t.ttype == sls::lexer::TokenType::Eof { break; }
        got.push(t);
    }

    assert_eq!(got.len(), 1usize, "token count mismatch");
    assert_eq!(got[0].ttype, sls::lexer::TokenType::Int);
        assert!(got[0].numeric.is_some(), "expected numeric value");
        assert_eq!(got[0].numeric.unwrap(), 493);
}

#[test]
fn test_integer_u64_hex_max() {
    let src = "0xFFFFFFFFFFFFFFFF:u64";
    let mut lexer = sls::lexer::Lexer::new(src);
    let mut got = vec![];
    loop {
        let t = lexer.next_token();
        if t.ttype == sls::lexer::TokenType::Eof { break; }
        got.push(t);
    }

    assert_eq!(got.len(), 1usize, "token count mismatch");
    assert_eq!(got[0].ttype, sls::lexer::TokenType::Int);
        assert!(got[0].numeric.is_some(), "expected numeric value");
        assert_eq!(got[0].numeric.unwrap(), UINT64_MAX);
}

#[test]
fn test_integer_u64_binary_sample() {
    let src = "0b1010101010101010:u64";
    let mut lexer = sls::lexer::Lexer::new(src);
    let mut got = vec![];
    loop {
        let t = lexer.next_token();
        if t.ttype == sls::lexer::TokenType::Eof { break; }
        got.push(t);
    }

    assert_eq!(got.len(), 1usize, "token count mismatch");
    assert_eq!(got[0].ttype, sls::lexer::TokenType::Int);
        assert!(got[0].numeric.is_some(), "expected numeric value");
        assert_eq!(got[0].numeric.unwrap(), 43690);
}

#[test]
fn test_integer_u64_octal_sample() {
    let src = "0o7777:u64";
    let mut lexer = sls::lexer::Lexer::new(src);
    let mut got = vec![];
    loop {
        let t = lexer.next_token();
        if t.ttype == sls::lexer::TokenType::Eof { break; }
        got.push(t);
    }

    assert_eq!(got.len(), 1usize, "token count mismatch");
    assert_eq!(got[0].ttype, sls::lexer::TokenType::Int);
        assert!(got[0].numeric.is_some(), "expected numeric value");
        assert_eq!(got[0].numeric.unwrap(), 4095);
}

#[test]
fn test_integer_u64_decimal() {
    let src = "42:u64";
    let mut lexer = sls::lexer::Lexer::new(src);
    let mut got = vec![];
    loop {
        let t = lexer.next_token();
        if t.ttype == sls::lexer::TokenType::Eof { break; }
        got.push(t);
    }

    assert_eq!(got.len(), 1usize, "token count mismatch");
    assert_eq!(got[0].ttype, sls::lexer::TokenType::Int);
        assert!(got[0].numeric.is_some(), "expected numeric value");
        assert_eq!(got[0].numeric.unwrap(), 42);
}

#[test]
fn test_integer_hex_with_underscores() {
    let src = "0xDEAD_BEEF:i64";
    let mut lexer = sls::lexer::Lexer::new(src);
    let mut got = vec![];
    loop {
        let t = lexer.next_token();
        if t.ttype == sls::lexer::TokenType::Eof { break; }
        got.push(t);
    }

    assert_eq!(got.len(), 1usize, "token count mismatch");
    assert_eq!(got[0].ttype, sls::lexer::TokenType::Int);
        assert!(got[0].numeric.is_some(), "expected numeric value");
        assert_eq!(got[0].numeric.unwrap(), 3735928559);
}

#[test]
fn test_integer_binary_with_underscores() {
    let src = "0b1111_0000_1010_0101:i32";
    let mut lexer = sls::lexer::Lexer::new(src);
    let mut got = vec![];
    loop {
        let t = lexer.next_token();
        if t.ttype == sls::lexer::TokenType::Eof { break; }
        got.push(t);
    }

    assert_eq!(got.len(), 1usize, "token count mismatch");
    assert_eq!(got[0].ttype, sls::lexer::TokenType::Int);
        assert!(got[0].numeric.is_some(), "expected numeric value");
        assert_eq!(got[0].numeric.unwrap(), 61605);
}

#[test]
fn test_integer_octal_with_underscores() {
    let src = "0o7_7_7:i16";
    let mut lexer = sls::lexer::Lexer::new(src);
    let mut got = vec![];
    loop {
        let t = lexer.next_token();
        if t.ttype == sls::lexer::TokenType::Eof { break; }
        got.push(t);
    }

    assert_eq!(got.len(), 1usize, "token count mismatch");
    assert_eq!(got[0].ttype, sls::lexer::TokenType::Int);
        assert!(got[0].numeric.is_some(), "expected numeric value");
        assert_eq!(got[0].numeric.unwrap(), 511);
}

#[test]
fn test_float_default_simple() {
    let src = "3.14";
    let mut lexer = sls::lexer::Lexer::new(src);
    let mut got = vec![];
    loop {
        let t = lexer.next_token();
        if t.ttype == sls::lexer::TokenType::Eof { break; }
        got.push(t);
    }

    assert_eq!(got.len(), 1usize, "token count mismatch");
    assert_eq!(got[0].ttype, sls::lexer::TokenType::Float);
        assert!(got[0].float.is_some(), "expected float value");
        assert!((got[0].float.unwrap() - 3.14).abs() < 1e-12);
}

#[test]
fn test_float_default_zero() {
    let src = "0.0";
    let mut lexer = sls::lexer::Lexer::new(src);
    let mut got = vec![];
    loop {
        let t = lexer.next_token();
        if t.ttype == sls::lexer::TokenType::Eof { break; }
        got.push(t);
    }

    assert_eq!(got.len(), 1usize, "token count mismatch");
    assert_eq!(got[0].ttype, sls::lexer::TokenType::Float);
        assert!(got[0].float.is_some(), "expected float value");
        assert!((got[0].float.unwrap() - 0.0).abs() < 1e-12);
}

#[test]
fn test_float_default_negative() {
    let src = "-2.5";
    let mut lexer = sls::lexer::Lexer::new(src);
    let mut got = vec![];
    loop {
        let t = lexer.next_token();
        if t.ttype == sls::lexer::TokenType::Eof { break; }
        got.push(t);
    }

    assert_eq!(got.len(), 1usize, "token count mismatch");
    assert_eq!(got[0].ttype, sls::lexer::TokenType::Float);
        assert!(got[0].float.is_some(), "expected float value");
        assert!((got[0].float.unwrap() - -2.5).abs() < 1e-12);
}

#[test]
fn test_float_default_one() {
    let src = "1.0";
    let mut lexer = sls::lexer::Lexer::new(src);
    let mut got = vec![];
    loop {
        let t = lexer.next_token();
        if t.ttype == sls::lexer::TokenType::Eof { break; }
        got.push(t);
    }

    assert_eq!(got.len(), 1usize, "token count mismatch");
    assert_eq!(got[0].ttype, sls::lexer::TokenType::Float);
        assert!(got[0].float.is_some(), "expected float value");
        assert!((got[0].float.unwrap() - 1.0).abs() < 1e-12);
}

#[test]
fn test_float_f32_simple() {
    let src = "3.14:f32";
    let mut lexer = sls::lexer::Lexer::new(src);
    let mut got = vec![];
    loop {
        let t = lexer.next_token();
        if t.ttype == sls::lexer::TokenType::Eof { break; }
        got.push(t);
    }

    assert_eq!(got.len(), 1usize, "token count mismatch");
    assert_eq!(got[0].ttype, sls::lexer::TokenType::Float);
        assert!(got[0].float.is_some(), "expected float value");
        assert!((got[0].float.unwrap() - 3.14).abs() < 1e-12);
}

#[test]
fn test_float_f64_simple() {
    let src = "2.718:f64";
    let mut lexer = sls::lexer::Lexer::new(src);
    let mut got = vec![];
    loop {
        let t = lexer.next_token();
        if t.ttype == sls::lexer::TokenType::Eof { break; }
        got.push(t);
    }

    assert_eq!(got.len(), 1usize, "token count mismatch");
    assert_eq!(got[0].ttype, sls::lexer::TokenType::Float);
        assert!(got[0].float.is_some(), "expected float value");
        assert!((got[0].float.unwrap() - 2.718).abs() < 1e-12);
}

#[test]
fn test_float_default_leading_zeros() {
    let src = "00042.5";
    let mut lexer = sls::lexer::Lexer::new(src);
    let mut got = vec![];
    loop {
        let t = lexer.next_token();
        if t.ttype == sls::lexer::TokenType::Eof { break; }
        got.push(t);
    }

    assert_eq!(got.len(), 1usize, "token count mismatch");
    assert_eq!(got[0].ttype, sls::lexer::TokenType::Float);
        assert!(got[0].float.is_some(), "expected float value");
        assert!((got[0].float.unwrap() - 42.5).abs() < 1e-12);
}

#[test]
fn test_float_default_leading_zero_decimal() {
    let src = "0.5";
    let mut lexer = sls::lexer::Lexer::new(src);
    let mut got = vec![];
    loop {
        let t = lexer.next_token();
        if t.ttype == sls::lexer::TokenType::Eof { break; }
        got.push(t);
    }

    assert_eq!(got.len(), 1usize, "token count mismatch");
    assert_eq!(got[0].ttype, sls::lexer::TokenType::Float);
        assert!(got[0].float.is_some(), "expected float value");
        assert!((got[0].float.unwrap() - 0.5).abs() < 1e-12);
}

#[test]
fn test_float_default_trailing_zeros() {
    let src = "3.1400";
    let mut lexer = sls::lexer::Lexer::new(src);
    let mut got = vec![];
    loop {
        let t = lexer.next_token();
        if t.ttype == sls::lexer::TokenType::Eof { break; }
        got.push(t);
    }

    assert_eq!(got.len(), 1usize, "token count mismatch");
    assert_eq!(got[0].ttype, sls::lexer::TokenType::Float);
        assert!(got[0].float.is_some(), "expected float value");
        assert!((got[0].float.unwrap() - 3.14).abs() < 1e-12);
}

#[test]
fn test_float_default_no_leading_digit() {
    let src = ".5";
    let mut lexer = sls::lexer::Lexer::new(src);
    let mut got = vec![];
    loop {
        let t = lexer.next_token();
        if t.ttype == sls::lexer::TokenType::Eof { break; }
        got.push(t);
    }

    assert_eq!(got.len(), 1usize, "token count mismatch");
    assert_eq!(got[0].ttype, sls::lexer::TokenType::Float);
        assert!(got[0].float.is_some(), "expected float value");
        assert!((got[0].float.unwrap() - 0.5).abs() < 1e-12);
}

#[test]
fn test_float_default_no_leading_digit_negative() {
    let src = "-.25";
    let mut lexer = sls::lexer::Lexer::new(src);
    let mut got = vec![];
    loop {
        let t = lexer.next_token();
        if t.ttype == sls::lexer::TokenType::Eof { break; }
        got.push(t);
    }

    assert_eq!(got.len(), 1usize, "token count mismatch");
    assert_eq!(got[0].ttype, sls::lexer::TokenType::Float);
        assert!(got[0].float.is_some(), "expected float value");
        assert!((got[0].float.unwrap() - -0.25).abs() < 1e-12);
}

#[test]
fn test_float_default_no_trailing_digits() {
    let src = "42.";
    let mut lexer = sls::lexer::Lexer::new(src);
    let mut got = vec![];
    loop {
        let t = lexer.next_token();
        if t.ttype == sls::lexer::TokenType::Eof { break; }
        got.push(t);
    }

    assert_eq!(got.len(), 1usize, "token count mismatch");
    assert_eq!(got[0].ttype, sls::lexer::TokenType::Float);
        assert!(got[0].float.is_some(), "expected float value");
        assert!((got[0].float.unwrap() - 42.0).abs() < 1e-12);
}

#[test]
fn test_float_default_no_trailing_digits_negative() {
    let src = "-7.";
    let mut lexer = sls::lexer::Lexer::new(src);
    let mut got = vec![];
    loop {
        let t = lexer.next_token();
        if t.ttype == sls::lexer::TokenType::Eof { break; }
        got.push(t);
    }

    assert_eq!(got.len(), 1usize, "token count mismatch");
    assert_eq!(got[0].ttype, sls::lexer::TokenType::Float);
        assert!(got[0].float.is_some(), "expected float value");
        assert!((got[0].float.unwrap() - -7.0).abs() < 1e-12);
}

#[test]
fn test_float_default_very_small() {
    let src = "0.000001";
    let mut lexer = sls::lexer::Lexer::new(src);
    let mut got = vec![];
    loop {
        let t = lexer.next_token();
        if t.ttype == sls::lexer::TokenType::Eof { break; }
        got.push(t);
    }

    assert_eq!(got.len(), 1usize, "token count mismatch");
    assert_eq!(got[0].ttype, sls::lexer::TokenType::Float);
        assert!(got[0].float.is_some(), "expected float value");
        assert!((got[0].float.unwrap() - 1e-06).abs() < 1e-12);
}

#[test]
fn test_float_default_very_large() {
    let src = "1000000.0";
    let mut lexer = sls::lexer::Lexer::new(src);
    let mut got = vec![];
    loop {
        let t = lexer.next_token();
        if t.ttype == sls::lexer::TokenType::Eof { break; }
        got.push(t);
    }

    assert_eq!(got.len(), 1usize, "token count mismatch");
    assert_eq!(got[0].ttype, sls::lexer::TokenType::Float);
        assert!(got[0].float.is_some(), "expected float value");
        assert!((got[0].float.unwrap() - 1000000.0).abs() < 1e-12);
}

#[test]
fn test_float_default_underscore_integer_part() {
    let src = "1_000_000.5";
    let mut lexer = sls::lexer::Lexer::new(src);
    let mut got = vec![];
    loop {
        let t = lexer.next_token();
        if t.ttype == sls::lexer::TokenType::Eof { break; }
        got.push(t);
    }

    assert_eq!(got.len(), 1usize, "token count mismatch");
    assert_eq!(got[0].ttype, sls::lexer::TokenType::Float);
        assert!(got[0].float.is_some(), "expected float value");
        assert!((got[0].float.unwrap() - 1000000.5).abs() < 1e-12);
}

#[test]
fn test_float_default_underscore_decimal_part() {
    let src = "3.141_592_653";
    let mut lexer = sls::lexer::Lexer::new(src);
    let mut got = vec![];
    loop {
        let t = lexer.next_token();
        if t.ttype == sls::lexer::TokenType::Eof { break; }
        got.push(t);
    }

    assert_eq!(got.len(), 1usize, "token count mismatch");
    assert_eq!(got[0].ttype, sls::lexer::TokenType::Float);
        assert!(got[0].float.is_some(), "expected float value");
        assert!((got[0].float.unwrap() - 3.141592653).abs() < 1e-12);
}

#[test]
fn test_float_default_underscore_both_parts() {
    let src = "1_234.567_89";
    let mut lexer = sls::lexer::Lexer::new(src);
    let mut got = vec![];
    loop {
        let t = lexer.next_token();
        if t.ttype == sls::lexer::TokenType::Eof { break; }
        got.push(t);
    }

    assert_eq!(got.len(), 1usize, "token count mismatch");
    assert_eq!(got[0].ttype, sls::lexer::TokenType::Float);
        assert!(got[0].float.is_some(), "expected float value");
        assert!((got[0].float.unwrap() - 1234.56789).abs() < 1e-12);
}

#[test]
fn test_float_default_underscore_trailing() {
    let src = "42.5_";
    let mut lexer = sls::lexer::Lexer::new(src);
    let mut got = vec![];
    loop {
        let t = lexer.next_token();
        if t.ttype == sls::lexer::TokenType::Eof { break; }
        got.push(t);
    }

    assert_eq!(got.len(), 1usize, "token count mismatch");
    assert_eq!(got[0].ttype, sls::lexer::TokenType::Float);
        assert!(got[0].float.is_some(), "expected float value");
        assert!((got[0].float.unwrap() - 42.5).abs() < 1e-12);
}

#[test]
fn test_float_default_underscore_double() {
    let src = "4__2.5";
    let mut lexer = sls::lexer::Lexer::new(src);
    let mut got = vec![];
    loop {
        let t = lexer.next_token();
        if t.ttype == sls::lexer::TokenType::Eof { break; }
        got.push(t);
    }

    assert_eq!(got.len(), 1usize, "token count mismatch");
    assert_eq!(got[0].ttype, sls::lexer::TokenType::Float);
        assert!(got[0].float.is_some(), "expected float value");
        assert!((got[0].float.unwrap() - 42.5).abs() < 1e-12);
}

#[test]
fn test_float_f32_with_underscores() {
    let src = "1_234.567_89:f32";
    let mut lexer = sls::lexer::Lexer::new(src);
    let mut got = vec![];
    loop {
        let t = lexer.next_token();
        if t.ttype == sls::lexer::TokenType::Eof { break; }
        got.push(t);
    }

    assert_eq!(got.len(), 1usize, "token count mismatch");
    assert_eq!(got[0].ttype, sls::lexer::TokenType::Float);
        assert!(got[0].float.is_some(), "expected float value");
        assert!((got[0].float.unwrap() - 1234.56789).abs() < 1e-12);
}

#[test]
fn test_float_f32_precision_limit() {
    let src = "1.2345678:f32";
    let mut lexer = sls::lexer::Lexer::new(src);
    let mut got = vec![];
    loop {
        let t = lexer.next_token();
        if t.ttype == sls::lexer::TokenType::Eof { break; }
        got.push(t);
    }

    assert_eq!(got.len(), 1usize, "token count mismatch");
    assert_eq!(got[0].ttype, sls::lexer::TokenType::Float);
        assert!(got[0].float.is_some(), "expected float value");
        assert!((got[0].float.unwrap() - 1.2345678).abs() < 1e-12);
}

#[test]
fn test_float_f32_high_precision() {
    let src = "3.141592653589793:f32";
    let mut lexer = sls::lexer::Lexer::new(src);
    let mut got = vec![];
    loop {
        let t = lexer.next_token();
        if t.ttype == sls::lexer::TokenType::Eof { break; }
        got.push(t);
    }

    assert_eq!(got.len(), 1usize, "token count mismatch");
    assert_eq!(got[0].ttype, sls::lexer::TokenType::Float);
        assert!(got[0].float.is_some(), "expected float value");
        assert!((got[0].float.unwrap() - 3.141592653589793).abs() < 1e-12);
}

#[test]
fn test_float_f64_precision_limit() {
    let src = "1.234567890123456:f64";
    let mut lexer = sls::lexer::Lexer::new(src);
    let mut got = vec![];
    loop {
        let t = lexer.next_token();
        if t.ttype == sls::lexer::TokenType::Eof { break; }
        got.push(t);
    }

    assert_eq!(got.len(), 1usize, "token count mismatch");
    assert_eq!(got[0].ttype, sls::lexer::TokenType::Float);
        assert!(got[0].float.is_some(), "expected float value");
        assert!((got[0].float.unwrap() - 1.234567890123456).abs() < 1e-12);
}

#[test]
fn test_float_f64_high_precision() {
    let src = "3.141592653589793238:f64";
    let mut lexer = sls::lexer::Lexer::new(src);
    let mut got = vec![];
    loop {
        let t = lexer.next_token();
        if t.ttype == sls::lexer::TokenType::Eof { break; }
        got.push(t);
    }

    assert_eq!(got.len(), 1usize, "token count mismatch");
    assert_eq!(got[0].ttype, sls::lexer::TokenType::Float);
        assert!(got[0].float.is_some(), "expected float value");
        assert!((got[0].float.unwrap() - 3.141592653589793).abs() < 1e-12);
}

#[test]
fn test_float_f64_close_numbers_1() {
    let src = "1.0000000000000001:f64";
    let mut lexer = sls::lexer::Lexer::new(src);
    let mut got = vec![];
    loop {
        let t = lexer.next_token();
        if t.ttype == sls::lexer::TokenType::Eof { break; }
        got.push(t);
    }

    assert_eq!(got.len(), 1usize, "token count mismatch");
    assert_eq!(got[0].ttype, sls::lexer::TokenType::Float);
        assert!(got[0].float.is_some(), "expected float value");
        assert!((got[0].float.unwrap() - 1.0).abs() < 1e-12);
}

#[test]
fn test_float_f64_close_numbers_2() {
    let src = "1.0000000000000002:f64";
    let mut lexer = sls::lexer::Lexer::new(src);
    let mut got = vec![];
    loop {
        let t = lexer.next_token();
        if t.ttype == sls::lexer::TokenType::Eof { break; }
        got.push(t);
    }

    assert_eq!(got.len(), 1usize, "token count mismatch");
    assert_eq!(got[0].ttype, sls::lexer::TokenType::Float);
        assert!(got[0].float.is_some(), "expected float value");
        assert!((got[0].float.unwrap() - 1.0000000000000002).abs() < 1e-12);
}

#[test]
fn test_float_invalid_multiple_decimal_points() {
    let src = "3.14.159";
    let mut lexer = sls::lexer::Lexer::new(src);
    let mut got = vec![];
    loop {
        let t = lexer.next_token();
        if t.ttype == sls::lexer::TokenType::Eof { break; }
        got.push(t);
    }

    assert_eq!(got.len(), 1usize, "token count mismatch");
    assert_eq!(got[0].ttype, sls::lexer::TokenType::Illegal);
}

#[test]
fn test_float_invalid_characters() {
    let src = "3.1a4";
    let mut lexer = sls::lexer::Lexer::new(src);
    let mut got = vec![];
    loop {
        let t = lexer.next_token();
        if t.ttype == sls::lexer::TokenType::Eof { break; }
        got.push(t);
    }

    assert_eq!(got.len(), 1usize, "token count mismatch");
    assert_eq!(got[0].ttype, sls::lexer::TokenType::Illegal);
}

#[test]
fn test_float_invalid_type_annotation() {
    let src = "3.14:i32";
    let mut lexer = sls::lexer::Lexer::new(src);
    let mut got = vec![];
    loop {
        let t = lexer.next_token();
        if t.ttype == sls::lexer::TokenType::Eof { break; }
        got.push(t);
    }

    assert_eq!(got.len(), 1usize, "token count mismatch");
    assert_eq!(got[0].ttype, sls::lexer::TokenType::Illegal);
}

#[test]
fn test_float_invalid_type_name() {
    let src = "3.14:f16";
    let mut lexer = sls::lexer::Lexer::new(src);
    let mut got = vec![];
    loop {
        let t = lexer.next_token();
        if t.ttype == sls::lexer::TokenType::Eof { break; }
        got.push(t);
    }

    assert_eq!(got.len(), 1usize, "token count mismatch");
    assert_eq!(got[0].ttype, sls::lexer::TokenType::Illegal);
}

#[test]
fn test_float_invalid_comma_separator() {
    let src = "1,234.56";
    let mut lexer = sls::lexer::Lexer::new(src);
    let mut got = vec![];
    loop {
        let t = lexer.next_token();
        if t.ttype == sls::lexer::TokenType::Eof { break; }
        got.push(t);
    }

    assert_eq!(got.len(), 1usize, "token count mismatch");
    assert_eq!(got[0].ttype, sls::lexer::TokenType::Illegal);
}

#[test]
fn test_float_default_leading_whitespace() {
    let src = "  3.14";
    let mut lexer = sls::lexer::Lexer::new(src);
    let mut got = vec![];
    loop {
        let t = lexer.next_token();
        if t.ttype == sls::lexer::TokenType::Eof { break; }
        got.push(t);
    }

    assert_eq!(got.len(), 1usize, "token count mismatch");
    assert_eq!(got[0].ttype, sls::lexer::TokenType::Float);
        assert!(got[0].float.is_some(), "expected float value");
        assert!((got[0].float.unwrap() - 3.14).abs() < 1e-12);
}

#[test]
fn test_float_default_trailing_whitespace() {
    let src = "3.14  ";
    let mut lexer = sls::lexer::Lexer::new(src);
    let mut got = vec![];
    loop {
        let t = lexer.next_token();
        if t.ttype == sls::lexer::TokenType::Eof { break; }
        got.push(t);
    }

    assert_eq!(got.len(), 1usize, "token count mismatch");
    assert_eq!(got[0].ttype, sls::lexer::TokenType::Float);
        assert!(got[0].float.is_some(), "expected float value");
        assert!((got[0].float.unwrap() - 3.14).abs() < 1e-12);
}

#[test]
fn test_float_default_both_whitespace() {
    let src = "  3.14  ";
    let mut lexer = sls::lexer::Lexer::new(src);
    let mut got = vec![];
    loop {
        let t = lexer.next_token();
        if t.ttype == sls::lexer::TokenType::Eof { break; }
        got.push(t);
    }

    assert_eq!(got.len(), 1usize, "token count mismatch");
    assert_eq!(got[0].ttype, sls::lexer::TokenType::Float);
        assert!(got[0].float.is_some(), "expected float value");
        assert!((got[0].float.unwrap() - 3.14).abs() < 1e-12);
}

#[test]
fn test_float_f32_with_whitespace() {
    let src = "  2.718:f32  ";
    let mut lexer = sls::lexer::Lexer::new(src);
    let mut got = vec![];
    loop {
        let t = lexer.next_token();
        if t.ttype == sls::lexer::TokenType::Eof { break; }
        got.push(t);
    }

    assert_eq!(got.len(), 1usize, "token count mismatch");
    assert_eq!(got[0].ttype, sls::lexer::TokenType::Float);
        assert!(got[0].float.is_some(), "expected float value");
        assert!((got[0].float.unwrap() - 2.718).abs() < 1e-12);
}

#[test]
fn test_float_default_pi_approximate() {
    let src = "3.141592653589793";
    let mut lexer = sls::lexer::Lexer::new(src);
    let mut got = vec![];
    loop {
        let t = lexer.next_token();
        if t.ttype == sls::lexer::TokenType::Eof { break; }
        got.push(t);
    }

    assert_eq!(got.len(), 1usize, "token count mismatch");
    assert_eq!(got[0].ttype, sls::lexer::TokenType::Float);
        assert!(got[0].float.is_some(), "expected float value");
        assert!((got[0].float.unwrap() - 3.141592653589793).abs() < 1e-12);
}

#[test]
fn test_float_f32_pi_approximate() {
    let src = "3.1415927:f32";
    let mut lexer = sls::lexer::Lexer::new(src);
    let mut got = vec![];
    loop {
        let t = lexer.next_token();
        if t.ttype == sls::lexer::TokenType::Eof { break; }
        got.push(t);
    }

    assert_eq!(got.len(), 1usize, "token count mismatch");
    assert_eq!(got[0].ttype, sls::lexer::TokenType::Float);
        assert!(got[0].float.is_some(), "expected float value");
        assert!((got[0].float.unwrap() - 3.1415927).abs() < 1e-12);
}

#[test]
fn test_float_default_euler_approximate() {
    let src = "2.718281828459045";
    let mut lexer = sls::lexer::Lexer::new(src);
    let mut got = vec![];
    loop {
        let t = lexer.next_token();
        if t.ttype == sls::lexer::TokenType::Eof { break; }
        got.push(t);
    }

    assert_eq!(got.len(), 1usize, "token count mismatch");
    assert_eq!(got[0].ttype, sls::lexer::TokenType::Float);
        assert!(got[0].float.is_some(), "expected float value");
        assert!((got[0].float.unwrap() - 2.718281828459045).abs() < 1e-12);
}

#[test]
fn test_float_f32_euler_approximate() {
    let src = "2.7182817:f32";
    let mut lexer = sls::lexer::Lexer::new(src);
    let mut got = vec![];
    loop {
        let t = lexer.next_token();
        if t.ttype == sls::lexer::TokenType::Eof { break; }
        got.push(t);
    }

    assert_eq!(got.len(), 1usize, "token count mismatch");
    assert_eq!(got[0].ttype, sls::lexer::TokenType::Float);
        assert!(got[0].float.is_some(), "expected float value");
        assert!((got[0].float.unwrap() - 2.7182817).abs() < 1e-12);
}

#[test]
fn test_float_default_golden_ratio() {
    let src = "1.618033988749895";
    let mut lexer = sls::lexer::Lexer::new(src);
    let mut got = vec![];
    loop {
        let t = lexer.next_token();
        if t.ttype == sls::lexer::TokenType::Eof { break; }
        got.push(t);
    }

    assert_eq!(got.len(), 1usize, "token count mismatch");
    assert_eq!(got[0].ttype, sls::lexer::TokenType::Float);
        assert!(got[0].float.is_some(), "expected float value");
        assert!((got[0].float.unwrap() - 1.618033988749895).abs() < 1e-12);
}

#[test]
fn test_float_default_sqrt2() {
    let src = "1.4142135623730951";
    let mut lexer = sls::lexer::Lexer::new(src);
    let mut got = vec![];
    loop {
        let t = lexer.next_token();
        if t.ttype == sls::lexer::TokenType::Eof { break; }
        got.push(t);
    }

    assert_eq!(got.len(), 1usize, "token count mismatch");
    assert_eq!(got[0].ttype, sls::lexer::TokenType::Float);
        assert!(got[0].float.is_some(), "expected float value");
        assert!((got[0].float.unwrap() - 1.4142135623730951).abs() < 1e-12);
}

#[test]
fn test_float_default_positive_zero() {
    let src = "0.0";
    let mut lexer = sls::lexer::Lexer::new(src);
    let mut got = vec![];
    loop {
        let t = lexer.next_token();
        if t.ttype == sls::lexer::TokenType::Eof { break; }
        got.push(t);
    }

    assert_eq!(got.len(), 1usize, "token count mismatch");
    assert_eq!(got[0].ttype, sls::lexer::TokenType::Float);
        assert!(got[0].float.is_some(), "expected float value");
        assert!((got[0].float.unwrap() - 0.0).abs() < 1e-12);
}

#[test]
fn test_float_default_negative_zero() {
    let src = "-0.0";
    let mut lexer = sls::lexer::Lexer::new(src);
    let mut got = vec![];
    loop {
        let t = lexer.next_token();
        if t.ttype == sls::lexer::TokenType::Eof { break; }
        got.push(t);
    }

    assert_eq!(got.len(), 1usize, "token count mismatch");
    assert_eq!(got[0].ttype, sls::lexer::TokenType::Float);
        assert!(got[0].float.is_some(), "expected float value");
        assert!((got[0].float.unwrap() - -0.0).abs() < 1e-12);
}

#[test]
fn test_float_f32_positive_zero() {
    let src = "0.0:f32";
    let mut lexer = sls::lexer::Lexer::new(src);
    let mut got = vec![];
    loop {
        let t = lexer.next_token();
        if t.ttype == sls::lexer::TokenType::Eof { break; }
        got.push(t);
    }

    assert_eq!(got.len(), 1usize, "token count mismatch");
    assert_eq!(got[0].ttype, sls::lexer::TokenType::Float);
        assert!(got[0].float.is_some(), "expected float value");
        assert!((got[0].float.unwrap() - 0.0).abs() < 1e-12);
}

#[test]
fn test_float_f32_negative_zero() {
    let src = "-0.0:f32";
    let mut lexer = sls::lexer::Lexer::new(src);
    let mut got = vec![];
    loop {
        let t = lexer.next_token();
        if t.ttype == sls::lexer::TokenType::Eof { break; }
        got.push(t);
    }

    assert_eq!(got.len(), 1usize, "token count mismatch");
    assert_eq!(got[0].ttype, sls::lexer::TokenType::Float);
        assert!(got[0].float.is_some(), "expected float value");
        assert!((got[0].float.unwrap() - -0.0).abs() < 1e-12);
}

#[test]
fn test_char_simple_letter_uppercase_a() {
    let src = "'A'";
    let mut lexer = sls::lexer::Lexer::new(src);
    let mut got = vec![];
    loop {
        let t = lexer.next_token();
        if t.ttype == sls::lexer::TokenType::Eof { break; }
        got.push(t);
    }

    assert_eq!(got.len(), 1usize, "token count mismatch");
    assert_eq!(got[0].ttype, sls::lexer::TokenType::Int);
        assert!(got[0].numeric.is_some(), "expected numeric char code");
        assert_eq!(got[0].numeric.unwrap(), 65);
}

#[test]
fn test_char_simple_letter_lowercase_a() {
    let src = "'a'";
    let mut lexer = sls::lexer::Lexer::new(src);
    let mut got = vec![];
    loop {
        let t = lexer.next_token();
        if t.ttype == sls::lexer::TokenType::Eof { break; }
        got.push(t);
    }

    assert_eq!(got.len(), 1usize, "token count mismatch");
    assert_eq!(got[0].ttype, sls::lexer::TokenType::Int);
        assert!(got[0].numeric.is_some(), "expected numeric char code");
        assert_eq!(got[0].numeric.unwrap(), 97);
}

#[test]
fn test_char_simple_letter_uppercase_z() {
    let src = "'Z'";
    let mut lexer = sls::lexer::Lexer::new(src);
    let mut got = vec![];
    loop {
        let t = lexer.next_token();
        if t.ttype == sls::lexer::TokenType::Eof { break; }
        got.push(t);
    }

    assert_eq!(got.len(), 1usize, "token count mismatch");
    assert_eq!(got[0].ttype, sls::lexer::TokenType::Int);
        assert!(got[0].numeric.is_some(), "expected numeric char code");
        assert_eq!(got[0].numeric.unwrap(), 90);
}

#[test]
fn test_char_simple_letter_lowercase_z() {
    let src = "'z'";
    let mut lexer = sls::lexer::Lexer::new(src);
    let mut got = vec![];
    loop {
        let t = lexer.next_token();
        if t.ttype == sls::lexer::TokenType::Eof { break; }
        got.push(t);
    }

    assert_eq!(got.len(), 1usize, "token count mismatch");
    assert_eq!(got[0].ttype, sls::lexer::TokenType::Int);
        assert!(got[0].numeric.is_some(), "expected numeric char code");
        assert_eq!(got[0].numeric.unwrap(), 122);
}

#[test]
fn test_char_digit_0() {
    let src = "'0'";
    let mut lexer = sls::lexer::Lexer::new(src);
    let mut got = vec![];
    loop {
        let t = lexer.next_token();
        if t.ttype == sls::lexer::TokenType::Eof { break; }
        got.push(t);
    }

    assert_eq!(got.len(), 1usize, "token count mismatch");
    assert_eq!(got[0].ttype, sls::lexer::TokenType::Int);
        assert!(got[0].numeric.is_some(), "expected numeric char code");
        assert_eq!(got[0].numeric.unwrap(), 48);
}

#[test]
fn test_char_digit_5() {
    let src = "'5'";
    let mut lexer = sls::lexer::Lexer::new(src);
    let mut got = vec![];
    loop {
        let t = lexer.next_token();
        if t.ttype == sls::lexer::TokenType::Eof { break; }
        got.push(t);
    }

    assert_eq!(got.len(), 1usize, "token count mismatch");
    assert_eq!(got[0].ttype, sls::lexer::TokenType::Int);
        assert!(got[0].numeric.is_some(), "expected numeric char code");
        assert_eq!(got[0].numeric.unwrap(), 53);
}

#[test]
fn test_char_digit_9() {
    let src = "'9'";
    let mut lexer = sls::lexer::Lexer::new(src);
    let mut got = vec![];
    loop {
        let t = lexer.next_token();
        if t.ttype == sls::lexer::TokenType::Eof { break; }
        got.push(t);
    }

    assert_eq!(got.len(), 1usize, "token count mismatch");
    assert_eq!(got[0].ttype, sls::lexer::TokenType::Int);
        assert!(got[0].numeric.is_some(), "expected numeric char code");
        assert_eq!(got[0].numeric.unwrap(), 57);
}

#[test]
fn test_char_space() {
    let src = "' '";
    let mut lexer = sls::lexer::Lexer::new(src);
    let mut got = vec![];
    loop {
        let t = lexer.next_token();
        if t.ttype == sls::lexer::TokenType::Eof { break; }
        got.push(t);
    }

    assert_eq!(got.len(), 1usize, "token count mismatch");
    assert_eq!(got[0].ttype, sls::lexer::TokenType::Int);
        assert!(got[0].numeric.is_some(), "expected numeric char code");
        assert_eq!(got[0].numeric.unwrap(), 32);
}

#[test]
fn test_char_exclamation() {
    let src = "'!'";
    let mut lexer = sls::lexer::Lexer::new(src);
    let mut got = vec![];
    loop {
        let t = lexer.next_token();
        if t.ttype == sls::lexer::TokenType::Eof { break; }
        got.push(t);
    }

    assert_eq!(got.len(), 1usize, "token count mismatch");
    assert_eq!(got[0].ttype, sls::lexer::TokenType::Int);
        assert!(got[0].numeric.is_some(), "expected numeric char code");
        assert_eq!(got[0].numeric.unwrap(), 33);
}

#[test]
fn test_char_question_mark() {
    let src = "'?'";
    let mut lexer = sls::lexer::Lexer::new(src);
    let mut got = vec![];
    loop {
        let t = lexer.next_token();
        if t.ttype == sls::lexer::TokenType::Eof { break; }
        got.push(t);
    }

    assert_eq!(got.len(), 1usize, "token count mismatch");
    assert_eq!(got[0].ttype, sls::lexer::TokenType::Int);
        assert!(got[0].numeric.is_some(), "expected numeric char code");
        assert_eq!(got[0].numeric.unwrap(), 63);
}

#[test]
fn test_char_period() {
    let src = "'.'";
    let mut lexer = sls::lexer::Lexer::new(src);
    let mut got = vec![];
    loop {
        let t = lexer.next_token();
        if t.ttype == sls::lexer::TokenType::Eof { break; }
        got.push(t);
    }

    assert_eq!(got.len(), 1usize, "token count mismatch");
    assert_eq!(got[0].ttype, sls::lexer::TokenType::Int);
        assert!(got[0].numeric.is_some(), "expected numeric char code");
        assert_eq!(got[0].numeric.unwrap(), 46);
}

#[test]
fn test_char_comma() {
    let src = "','";
    let mut lexer = sls::lexer::Lexer::new(src);
    let mut got = vec![];
    loop {
        let t = lexer.next_token();
        if t.ttype == sls::lexer::TokenType::Eof { break; }
        got.push(t);
    }

    assert_eq!(got.len(), 1usize, "token count mismatch");
    assert_eq!(got[0].ttype, sls::lexer::TokenType::Int);
        assert!(got[0].numeric.is_some(), "expected numeric char code");
        assert_eq!(got[0].numeric.unwrap(), 44);
}

#[test]
fn test_char_semicolon() {
    let src = "';'";
    let mut lexer = sls::lexer::Lexer::new(src);
    let mut got = vec![];
    loop {
        let t = lexer.next_token();
        if t.ttype == sls::lexer::TokenType::Eof { break; }
        got.push(t);
    }

    assert_eq!(got.len(), 1usize, "token count mismatch");
    assert_eq!(got[0].ttype, sls::lexer::TokenType::Int);
        assert!(got[0].numeric.is_some(), "expected numeric char code");
        assert_eq!(got[0].numeric.unwrap(), 59);
}

#[test]
fn test_char_colon() {
    let src = "':'";
    let mut lexer = sls::lexer::Lexer::new(src);
    let mut got = vec![];
    loop {
        let t = lexer.next_token();
        if t.ttype == sls::lexer::TokenType::Eof { break; }
        got.push(t);
    }

    assert_eq!(got.len(), 1usize, "token count mismatch");
    assert_eq!(got[0].ttype, sls::lexer::TokenType::Int);
        assert!(got[0].numeric.is_some(), "expected numeric char code");
        assert_eq!(got[0].numeric.unwrap(), 58);
}

#[test]
fn test_char_plus() {
    let src = "'+'";
    let mut lexer = sls::lexer::Lexer::new(src);
    let mut got = vec![];
    loop {
        let t = lexer.next_token();
        if t.ttype == sls::lexer::TokenType::Eof { break; }
        got.push(t);
    }

    assert_eq!(got.len(), 1usize, "token count mismatch");
    assert_eq!(got[0].ttype, sls::lexer::TokenType::Int);
        assert!(got[0].numeric.is_some(), "expected numeric char code");
        assert_eq!(got[0].numeric.unwrap(), 43);
}

#[test]
fn test_char_minus() {
    let src = "'-'";
    let mut lexer = sls::lexer::Lexer::new(src);
    let mut got = vec![];
    loop {
        let t = lexer.next_token();
        if t.ttype == sls::lexer::TokenType::Eof { break; }
        got.push(t);
    }

    assert_eq!(got.len(), 1usize, "token count mismatch");
    assert_eq!(got[0].ttype, sls::lexer::TokenType::Int);
        assert!(got[0].numeric.is_some(), "expected numeric char code");
        assert_eq!(got[0].numeric.unwrap(), 45);
}

#[test]
fn test_char_asterisk() {
    let src = "'*'";
    let mut lexer = sls::lexer::Lexer::new(src);
    let mut got = vec![];
    loop {
        let t = lexer.next_token();
        if t.ttype == sls::lexer::TokenType::Eof { break; }
        got.push(t);
    }

    assert_eq!(got.len(), 1usize, "token count mismatch");
    assert_eq!(got[0].ttype, sls::lexer::TokenType::Int);
        assert!(got[0].numeric.is_some(), "expected numeric char code");
        assert_eq!(got[0].numeric.unwrap(), 42);
}

#[test]
fn test_char_slash() {
    let src = "'/'";
    let mut lexer = sls::lexer::Lexer::new(src);
    let mut got = vec![];
    loop {
        let t = lexer.next_token();
        if t.ttype == sls::lexer::TokenType::Eof { break; }
        got.push(t);
    }

    assert_eq!(got.len(), 1usize, "token count mismatch");
    assert_eq!(got[0].ttype, sls::lexer::TokenType::Int);
        assert!(got[0].numeric.is_some(), "expected numeric char code");
        assert_eq!(got[0].numeric.unwrap(), 47);
}

#[test]
fn test_char_equals() {
    let src = "'='";
    let mut lexer = sls::lexer::Lexer::new(src);
    let mut got = vec![];
    loop {
        let t = lexer.next_token();
        if t.ttype == sls::lexer::TokenType::Eof { break; }
        got.push(t);
    }

    assert_eq!(got.len(), 1usize, "token count mismatch");
    assert_eq!(got[0].ttype, sls::lexer::TokenType::Int);
        assert!(got[0].numeric.is_some(), "expected numeric char code");
        assert_eq!(got[0].numeric.unwrap(), 61);
}

#[test]
fn test_char_less_than() {
    let src = "'<'";
    let mut lexer = sls::lexer::Lexer::new(src);
    let mut got = vec![];
    loop {
        let t = lexer.next_token();
        if t.ttype == sls::lexer::TokenType::Eof { break; }
        got.push(t);
    }

    assert_eq!(got.len(), 1usize, "token count mismatch");
    assert_eq!(got[0].ttype, sls::lexer::TokenType::Int);
        assert!(got[0].numeric.is_some(), "expected numeric char code");
        assert_eq!(got[0].numeric.unwrap(), 60);
}

#[test]
fn test_char_greater_than() {
    let src = "'>'";
    let mut lexer = sls::lexer::Lexer::new(src);
    let mut got = vec![];
    loop {
        let t = lexer.next_token();
        if t.ttype == sls::lexer::TokenType::Eof { break; }
        got.push(t);
    }

    assert_eq!(got.len(), 1usize, "token count mismatch");
    assert_eq!(got[0].ttype, sls::lexer::TokenType::Int);
        assert!(got[0].numeric.is_some(), "expected numeric char code");
        assert_eq!(got[0].numeric.unwrap(), 62);
}

#[test]
fn test_char_left_paren() {
    let src = "'('";
    let mut lexer = sls::lexer::Lexer::new(src);
    let mut got = vec![];
    loop {
        let t = lexer.next_token();
        if t.ttype == sls::lexer::TokenType::Eof { break; }
        got.push(t);
    }

    assert_eq!(got.len(), 1usize, "token count mismatch");
    assert_eq!(got[0].ttype, sls::lexer::TokenType::Int);
        assert!(got[0].numeric.is_some(), "expected numeric char code");
        assert_eq!(got[0].numeric.unwrap(), 40);
}

#[test]
fn test_char_right_paren() {
    let src = "')'";
    let mut lexer = sls::lexer::Lexer::new(src);
    let mut got = vec![];
    loop {
        let t = lexer.next_token();
        if t.ttype == sls::lexer::TokenType::Eof { break; }
        got.push(t);
    }

    assert_eq!(got.len(), 1usize, "token count mismatch");
    assert_eq!(got[0].ttype, sls::lexer::TokenType::Int);
        assert!(got[0].numeric.is_some(), "expected numeric char code");
        assert_eq!(got[0].numeric.unwrap(), 41);
}

#[test]
fn test_char_left_bracket() {
    let src = "'['";
    let mut lexer = sls::lexer::Lexer::new(src);
    let mut got = vec![];
    loop {
        let t = lexer.next_token();
        if t.ttype == sls::lexer::TokenType::Eof { break; }
        got.push(t);
    }

    assert_eq!(got.len(), 1usize, "token count mismatch");
    assert_eq!(got[0].ttype, sls::lexer::TokenType::Int);
        assert!(got[0].numeric.is_some(), "expected numeric char code");
        assert_eq!(got[0].numeric.unwrap(), 91);
}

#[test]
fn test_char_right_bracket() {
    let src = "']'";
    let mut lexer = sls::lexer::Lexer::new(src);
    let mut got = vec![];
    loop {
        let t = lexer.next_token();
        if t.ttype == sls::lexer::TokenType::Eof { break; }
        got.push(t);
    }

    assert_eq!(got.len(), 1usize, "token count mismatch");
    assert_eq!(got[0].ttype, sls::lexer::TokenType::Int);
        assert!(got[0].numeric.is_some(), "expected numeric char code");
        assert_eq!(got[0].numeric.unwrap(), 93);
}

#[test]
fn test_char_left_brace() {
    let src = "'{'";
    let mut lexer = sls::lexer::Lexer::new(src);
    let mut got = vec![];
    loop {
        let t = lexer.next_token();
        if t.ttype == sls::lexer::TokenType::Eof { break; }
        got.push(t);
    }

    assert_eq!(got.len(), 1usize, "token count mismatch");
    assert_eq!(got[0].ttype, sls::lexer::TokenType::Int);
        assert!(got[0].numeric.is_some(), "expected numeric char code");
        assert_eq!(got[0].numeric.unwrap(), 123);
}

#[test]
fn test_char_right_brace() {
    let src = "'}'";
    let mut lexer = sls::lexer::Lexer::new(src);
    let mut got = vec![];
    loop {
        let t = lexer.next_token();
        if t.ttype == sls::lexer::TokenType::Eof { break; }
        got.push(t);
    }

    assert_eq!(got.len(), 1usize, "token count mismatch");
    assert_eq!(got[0].ttype, sls::lexer::TokenType::Int);
        assert!(got[0].numeric.is_some(), "expected numeric char code");
        assert_eq!(got[0].numeric.unwrap(), 125);
}

#[test]
fn test_char_escape_single_quote() {
    let src = "'\\\\''";
    let mut lexer = sls::lexer::Lexer::new(src);
    let mut got = vec![];
    loop {
        let t = lexer.next_token();
        if t.ttype == sls::lexer::TokenType::Eof { break; }
        got.push(t);
    }

    assert_eq!(got.len(), 1usize, "token count mismatch");
    assert_eq!(got[0].ttype, sls::lexer::TokenType::Int);
        assert!(got[0].numeric.is_some(), "expected numeric char code");
        assert_eq!(got[0].numeric.unwrap(), 39);
}

#[test]
fn test_char_escape_newline() {
    let src = "'\\\\n'";
    let mut lexer = sls::lexer::Lexer::new(src);
    let mut got = vec![];
    loop {
        let t = lexer.next_token();
        if t.ttype == sls::lexer::TokenType::Eof { break; }
        got.push(t);
    }

    assert_eq!(got.len(), 1usize, "token count mismatch");
    assert_eq!(got[0].ttype, sls::lexer::TokenType::Int);
        assert!(got[0].numeric.is_some(), "expected numeric char code");
        assert_eq!(got[0].numeric.unwrap(), 10);
}

#[test]
fn test_char_escape_null_character() {
    let src = "'\\\\0'";
    let mut lexer = sls::lexer::Lexer::new(src);
    let mut got = vec![];
    loop {
        let t = lexer.next_token();
        if t.ttype == sls::lexer::TokenType::Eof { break; }
        got.push(t);
    }

    assert_eq!(got.len(), 1usize, "token count mismatch");
    assert_eq!(got[0].ttype, sls::lexer::TokenType::Int);
        assert!(got[0].numeric.is_some(), "expected numeric char code");
        assert_eq!(got[0].numeric.unwrap(), 0);
}

#[test]
fn test_char_escape_backslash() {
    let src = "'\\\\\\\\'";
    let mut lexer = sls::lexer::Lexer::new(src);
    let mut got = vec![];
    loop {
        let t = lexer.next_token();
        if t.ttype == sls::lexer::TokenType::Eof { break; }
        got.push(t);
    }

    assert_eq!(got.len(), 1usize, "token count mismatch");
    assert_eq!(got[0].ttype, sls::lexer::TokenType::Int);
        assert!(got[0].numeric.is_some(), "expected numeric char code");
        assert_eq!(got[0].numeric.unwrap(), 92);
}

#[test]
fn test_char_escape_tab() {
    let src = "'\\\\t'";
    let mut lexer = sls::lexer::Lexer::new(src);
    let mut got = vec![];
    loop {
        let t = lexer.next_token();
        if t.ttype == sls::lexer::TokenType::Eof { break; }
        got.push(t);
    }

    assert_eq!(got.len(), 1usize, "token count mismatch");
    assert_eq!(got[0].ttype, sls::lexer::TokenType::Int);
        assert!(got[0].numeric.is_some(), "expected numeric char code");
        assert_eq!(got[0].numeric.unwrap(), 9);
}

#[test]
fn test_char_escape_carriage_return() {
    let src = "'\\\\r'";
    let mut lexer = sls::lexer::Lexer::new(src);
    let mut got = vec![];
    loop {
        let t = lexer.next_token();
        if t.ttype == sls::lexer::TokenType::Eof { break; }
        got.push(t);
    }

    assert_eq!(got.len(), 1usize, "token count mismatch");
    assert_eq!(got[0].ttype, sls::lexer::TokenType::Int);
        assert!(got[0].numeric.is_some(), "expected numeric char code");
        assert_eq!(got[0].numeric.unwrap(), 13);
}

#[test]
fn test_char_with_leading_whitespace() {
    let src = "  'A'";
    let mut lexer = sls::lexer::Lexer::new(src);
    let mut got = vec![];
    loop {
        let t = lexer.next_token();
        if t.ttype == sls::lexer::TokenType::Eof { break; }
        got.push(t);
    }

    assert_eq!(got.len(), 1usize, "token count mismatch");
    assert_eq!(got[0].ttype, sls::lexer::TokenType::Int);
        assert!(got[0].numeric.is_some(), "expected numeric char code");
        assert_eq!(got[0].numeric.unwrap(), 65);
}

#[test]
fn test_char_with_trailing_whitespace() {
    let src = "'A'  ";
    let mut lexer = sls::lexer::Lexer::new(src);
    let mut got = vec![];
    loop {
        let t = lexer.next_token();
        if t.ttype == sls::lexer::TokenType::Eof { break; }
        got.push(t);
    }

    assert_eq!(got.len(), 1usize, "token count mismatch");
    assert_eq!(got[0].ttype, sls::lexer::TokenType::Int);
        assert!(got[0].numeric.is_some(), "expected numeric char code");
        assert_eq!(got[0].numeric.unwrap(), 65);
}

#[test]
fn test_char_with_both_whitespace() {
    let src = "  'A'  ";
    let mut lexer = sls::lexer::Lexer::new(src);
    let mut got = vec![];
    loop {
        let t = lexer.next_token();
        if t.ttype == sls::lexer::TokenType::Eof { break; }
        got.push(t);
    }

    assert_eq!(got.len(), 1usize, "token count mismatch");
    assert_eq!(got[0].ttype, sls::lexer::TokenType::Int);
        assert!(got[0].numeric.is_some(), "expected numeric char code");
        assert_eq!(got[0].numeric.unwrap(), 65);
}

#[test]
fn test_char_tab_before() {
    let src = "\\t'B'";
    let mut lexer = sls::lexer::Lexer::new(src);
    let mut got = vec![];
    loop {
        let t = lexer.next_token();
        if t.ttype == sls::lexer::TokenType::Eof { break; }
        got.push(t);
    }

    assert_eq!(got.len(), 1usize, "token count mismatch");
    assert_eq!(got[0].ttype, sls::lexer::TokenType::Int);
        assert!(got[0].numeric.is_some(), "expected numeric char code");
        assert_eq!(got[0].numeric.unwrap(), 66);
}

#[test]
fn test_char_newline_before() {
    let src = "\\n'C'";
    let mut lexer = sls::lexer::Lexer::new(src);
    let mut got = vec![];
    loop {
        let t = lexer.next_token();
        if t.ttype == sls::lexer::TokenType::Eof { break; }
        got.push(t);
    }

    assert_eq!(got.len(), 1usize, "token count mismatch");
    assert_eq!(got[0].ttype, sls::lexer::TokenType::Int);
        assert!(got[0].numeric.is_some(), "expected numeric char code");
        assert_eq!(got[0].numeric.unwrap(), 67);
}

#[test]
fn test_char_empty_literal() {
    let src = "''";
    let mut lexer = sls::lexer::Lexer::new(src);
    let mut got = vec![];
    loop {
        let t = lexer.next_token();
        if t.ttype == sls::lexer::TokenType::Eof { break; }
        got.push(t);
    }

    assert_eq!(got.len(), 1usize, "token count mismatch");
    assert_eq!(got[0].ttype, sls::lexer::TokenType::Illegal);
}

#[test]
fn test_char_multiple_characters() {
    let src = "'AB'";
    let mut lexer = sls::lexer::Lexer::new(src);
    let mut got = vec![];
    loop {
        let t = lexer.next_token();
        if t.ttype == sls::lexer::TokenType::Eof { break; }
        got.push(t);
    }

    assert_eq!(got.len(), 1usize, "token count mismatch");
    assert_eq!(got[0].ttype, sls::lexer::TokenType::Illegal);
}

#[test]
fn test_char_unclosed_quote() {
    let src = "'A";
    let mut lexer = sls::lexer::Lexer::new(src);
    let mut got = vec![];
    loop {
        let t = lexer.next_token();
        if t.ttype == sls::lexer::TokenType::Eof { break; }
        got.push(t);
    }

    assert_eq!(got.len(), 1usize, "token count mismatch");
    assert_eq!(got[0].ttype, sls::lexer::TokenType::Illegal);
}

#[test]
fn test_char_unescaped_newline() {
    let src = "'\\n'";
    let mut lexer = sls::lexer::Lexer::new(src);
    let mut got = vec![];
    loop {
        let t = lexer.next_token();
        if t.ttype == sls::lexer::TokenType::Eof { break; }
        got.push(t);
    }

    assert_eq!(got.len(), 1usize, "token count mismatch");
    assert_eq!(got[0].ttype, sls::lexer::TokenType::Illegal);
}

#[test]
fn test_char_invalid_escape() {
    let src = "'\\\\q'";
    let mut lexer = sls::lexer::Lexer::new(src);
    let mut got = vec![];
    loop {
        let t = lexer.next_token();
        if t.ttype == sls::lexer::TokenType::Eof { break; }
        got.push(t);
    }

    assert_eq!(got.len(), 1usize, "token count mismatch");
    assert_eq!(got[0].ttype, sls::lexer::TokenType::Illegal);
}

#[test]
fn test_identifier_simple_lowercase() {
    let src = "hello";
    let mut lexer = sls::lexer::Lexer::new(src);
    let mut got = vec![];
    loop {
        let t = lexer.next_token();
        if t.ttype == sls::lexer::TokenType::Eof { break; }
        got.push(t);
    }

    assert_eq!(got.len(), 1usize, "token count mismatch");
    assert_eq!(got[0].ttype, sls::lexer::TokenType::Ident);
        assert_eq!(got[0].lexeme, "hello");
}

#[test]
fn test_identifier_simple_uppercase() {
    let src = "HELLO";
    let mut lexer = sls::lexer::Lexer::new(src);
    let mut got = vec![];
    loop {
        let t = lexer.next_token();
        if t.ttype == sls::lexer::TokenType::Eof { break; }
        got.push(t);
    }

    assert_eq!(got.len(), 1usize, "token count mismatch");
    assert_eq!(got[0].ttype, sls::lexer::TokenType::Ident);
        assert_eq!(got[0].lexeme, "HELLO");
}

#[test]
fn test_identifier_mixed_case() {
    let src = "HelloWorld";
    let mut lexer = sls::lexer::Lexer::new(src);
    let mut got = vec![];
    loop {
        let t = lexer.next_token();
        if t.ttype == sls::lexer::TokenType::Eof { break; }
        got.push(t);
    }

    assert_eq!(got.len(), 1usize, "token count mismatch");
    assert_eq!(got[0].ttype, sls::lexer::TokenType::Ident);
        assert_eq!(got[0].lexeme, "HelloWorld");
}

#[test]
fn test_identifier_single_letter() {
    let src = "x";
    let mut lexer = sls::lexer::Lexer::new(src);
    let mut got = vec![];
    loop {
        let t = lexer.next_token();
        if t.ttype == sls::lexer::TokenType::Eof { break; }
        got.push(t);
    }

    assert_eq!(got.len(), 1usize, "token count mismatch");
    assert_eq!(got[0].ttype, sls::lexer::TokenType::Ident);
        assert_eq!(got[0].lexeme, "x");
}

#[test]
fn test_identifier_single_letter_upper() {
    let src = "X";
    let mut lexer = sls::lexer::Lexer::new(src);
    let mut got = vec![];
    loop {
        let t = lexer.next_token();
        if t.ttype == sls::lexer::TokenType::Eof { break; }
        got.push(t);
    }

    assert_eq!(got.len(), 1usize, "token count mismatch");
    assert_eq!(got[0].ttype, sls::lexer::TokenType::Ident);
        assert_eq!(got[0].lexeme, "X");
}

#[test]
fn test_identifier_with_numbers() {
    let src = "var123";
    let mut lexer = sls::lexer::Lexer::new(src);
    let mut got = vec![];
    loop {
        let t = lexer.next_token();
        if t.ttype == sls::lexer::TokenType::Eof { break; }
        got.push(t);
    }

    assert_eq!(got.len(), 1usize, "token count mismatch");
    assert_eq!(got[0].ttype, sls::lexer::TokenType::Ident);
        assert_eq!(got[0].lexeme, "var123");
}

#[test]
fn test_identifier_numbers_end() {
    let src = "myVar2";
    let mut lexer = sls::lexer::Lexer::new(src);
    let mut got = vec![];
    loop {
        let t = lexer.next_token();
        if t.ttype == sls::lexer::TokenType::Eof { break; }
        got.push(t);
    }

    assert_eq!(got.len(), 1usize, "token count mismatch");
    assert_eq!(got[0].ttype, sls::lexer::TokenType::Ident);
        assert_eq!(got[0].lexeme, "myVar2");
}

#[test]
fn test_identifier_mixed_numbers() {
    let src = "a1b2c3";
    let mut lexer = sls::lexer::Lexer::new(src);
    let mut got = vec![];
    loop {
        let t = lexer.next_token();
        if t.ttype == sls::lexer::TokenType::Eof { break; }
        got.push(t);
    }

    assert_eq!(got.len(), 1usize, "token count mismatch");
    assert_eq!(got[0].ttype, sls::lexer::TokenType::Ident);
        assert_eq!(got[0].lexeme, "a1b2c3");
}

#[test]
fn test_identifier_with_underscore() {
    let src = "hello_world";
    let mut lexer = sls::lexer::Lexer::new(src);
    let mut got = vec![];
    loop {
        let t = lexer.next_token();
        if t.ttype == sls::lexer::TokenType::Eof { break; }
        got.push(t);
    }

    assert_eq!(got.len(), 1usize, "token count mismatch");
    assert_eq!(got[0].ttype, sls::lexer::TokenType::Ident);
        assert_eq!(got[0].lexeme, "hello_world");
}

#[test]
fn test_identifier_leading_underscore() {
    let src = "_private";
    let mut lexer = sls::lexer::Lexer::new(src);
    let mut got = vec![];
    loop {
        let t = lexer.next_token();
        if t.ttype == sls::lexer::TokenType::Eof { break; }
        got.push(t);
    }

    assert_eq!(got.len(), 1usize, "token count mismatch");
    assert_eq!(got[0].ttype, sls::lexer::TokenType::Ident);
        assert_eq!(got[0].lexeme, "_private");
}

#[test]
fn test_identifier_multiple_underscores() {
    let src = "my_long_var_name";
    let mut lexer = sls::lexer::Lexer::new(src);
    let mut got = vec![];
    loop {
        let t = lexer.next_token();
        if t.ttype == sls::lexer::TokenType::Eof { break; }
        got.push(t);
    }

    assert_eq!(got.len(), 1usize, "token count mismatch");
    assert_eq!(got[0].ttype, sls::lexer::TokenType::Ident);
        assert_eq!(got[0].lexeme, "my_long_var_name");
}

#[test]
fn test_identifier_double_underscore() {
    let src = "my__var";
    let mut lexer = sls::lexer::Lexer::new(src);
    let mut got = vec![];
    loop {
        let t = lexer.next_token();
        if t.ttype == sls::lexer::TokenType::Eof { break; }
        got.push(t);
    }

    assert_eq!(got.len(), 1usize, "token count mismatch");
    assert_eq!(got[0].ttype, sls::lexer::TokenType::Ident);
        assert_eq!(got[0].lexeme, "my__var");
}

#[test]
fn test_identifier_trailing_underscore() {
    let src = "var_";
    let mut lexer = sls::lexer::Lexer::new(src);
    let mut got = vec![];
    loop {
        let t = lexer.next_token();
        if t.ttype == sls::lexer::TokenType::Eof { break; }
        got.push(t);
    }

    assert_eq!(got.len(), 1usize, "token count mismatch");
    assert_eq!(got[0].ttype, sls::lexer::TokenType::Ident);
        assert_eq!(got[0].lexeme, "var_");
}

#[test]
fn test_identifier_only_underscores() {
    let src = "___";
    let mut lexer = sls::lexer::Lexer::new(src);
    let mut got = vec![];
    loop {
        let t = lexer.next_token();
        if t.ttype == sls::lexer::TokenType::Eof { break; }
        got.push(t);
    }

    assert_eq!(got.len(), 1usize, "token count mismatch");
    assert_eq!(got[0].ttype, sls::lexer::TokenType::Ident);
        assert_eq!(got[0].lexeme, "___");
}

#[test]
fn test_identifier_snake_case() {
    let src = "my_variable_name";
    let mut lexer = sls::lexer::Lexer::new(src);
    let mut got = vec![];
    loop {
        let t = lexer.next_token();
        if t.ttype == sls::lexer::TokenType::Eof { break; }
        got.push(t);
    }

    assert_eq!(got.len(), 1usize, "token count mismatch");
    assert_eq!(got[0].ttype, sls::lexer::TokenType::Ident);
        assert_eq!(got[0].lexeme, "my_variable_name");
}

#[test]
fn test_identifier_camel_case() {
    let src = "myVariableName";
    let mut lexer = sls::lexer::Lexer::new(src);
    let mut got = vec![];
    loop {
        let t = lexer.next_token();
        if t.ttype == sls::lexer::TokenType::Eof { break; }
        got.push(t);
    }

    assert_eq!(got.len(), 1usize, "token count mismatch");
    assert_eq!(got[0].ttype, sls::lexer::TokenType::Ident);
        assert_eq!(got[0].lexeme, "myVariableName");
}

#[test]
fn test_identifier_pascal_case() {
    let src = "MyClassName";
    let mut lexer = sls::lexer::Lexer::new(src);
    let mut got = vec![];
    loop {
        let t = lexer.next_token();
        if t.ttype == sls::lexer::TokenType::Eof { break; }
        got.push(t);
    }

    assert_eq!(got.len(), 1usize, "token count mismatch");
    assert_eq!(got[0].ttype, sls::lexer::TokenType::Ident);
        assert_eq!(got[0].lexeme, "MyClassName");
}

#[test]
fn test_identifier_all_caps() {
    let src = "MY_CONSTANT";
    let mut lexer = sls::lexer::Lexer::new(src);
    let mut got = vec![];
    loop {
        let t = lexer.next_token();
        if t.ttype == sls::lexer::TokenType::Eof { break; }
        got.push(t);
    }

    assert_eq!(got.len(), 1usize, "token count mismatch");
    assert_eq!(got[0].ttype, sls::lexer::TokenType::Ident);
        assert_eq!(got[0].lexeme, "MY_CONSTANT");
}

#[test]
fn test_identifier_with_dash() {
    let src = "my-var";
    let mut lexer = sls::lexer::Lexer::new(src);
    let mut got = vec![];
    loop {
        let t = lexer.next_token();
        if t.ttype == sls::lexer::TokenType::Eof { break; }
        got.push(t);
    }

    assert_eq!(got.len(), 1usize, "token count mismatch");
    assert_eq!(got[0].ttype, sls::lexer::TokenType::Ident);
        assert_eq!(got[0].lexeme, "my-var");
}

#[test]
fn test_identifier_literal_simple() {
    let src = "::hello";
    let mut lexer = sls::lexer::Lexer::new(src);
    let mut got = vec![];
    loop {
        let t = lexer.next_token();
        if t.ttype == sls::lexer::TokenType::Eof { break; }
        got.push(t);
    }

    assert_eq!(got.len(), 1usize, "token count mismatch");
    assert_eq!(got[0].ttype, sls::lexer::TokenType::Ident);
        assert_eq!(got[0].lexeme, "hello");
}

#[test]
fn test_identifier_literal_uppercase() {
    let src = "::Point";
    let mut lexer = sls::lexer::Lexer::new(src);
    let mut got = vec![];
    loop {
        let t = lexer.next_token();
        if t.ttype == sls::lexer::TokenType::Eof { break; }
        got.push(t);
    }

    assert_eq!(got.len(), 1usize, "token count mismatch");
    assert_eq!(got[0].ttype, sls::lexer::TokenType::Ident);
        assert_eq!(got[0].lexeme, "Point");
}

#[test]
fn test_identifier_literal_snake_case() {
    let src = "::my_var";
    let mut lexer = sls::lexer::Lexer::new(src);
    let mut got = vec![];
    loop {
        let t = lexer.next_token();
        if t.ttype == sls::lexer::TokenType::Eof { break; }
        got.push(t);
    }

    assert_eq!(got.len(), 1usize, "token count mismatch");
    assert_eq!(got[0].ttype, sls::lexer::TokenType::Ident);
        assert_eq!(got[0].lexeme, "my_var");
}

#[test]
fn test_identifier_literal_type_i64() {
    let src = "::i64";
    let mut lexer = sls::lexer::Lexer::new(src);
    let mut got = vec![];
    loop {
        let t = lexer.next_token();
        if t.ttype == sls::lexer::TokenType::Eof { break; }
        got.push(t);
    }

    assert_eq!(got.len(), 1usize, "token count mismatch");
    assert_eq!(got[0].ttype, sls::lexer::TokenType::Ident);
        assert_eq!(got[0].lexeme, "i64");
}

#[test]
fn test_identifier_literal_type_string() {
    let src = "::String";
    let mut lexer = sls::lexer::Lexer::new(src);
    let mut got = vec![];
    loop {
        let t = lexer.next_token();
        if t.ttype == sls::lexer::TokenType::Eof { break; }
        got.push(t);
    }

    assert_eq!(got.len(), 1usize, "token count mismatch");
    assert_eq!(got[0].ttype, sls::lexer::TokenType::Ident);
        assert_eq!(got[0].lexeme, "String");
}

#[test]
fn test_identifier_literal_type_point() {
    let src = "::Point";
    let mut lexer = sls::lexer::Lexer::new(src);
    let mut got = vec![];
    loop {
        let t = lexer.next_token();
        if t.ttype == sls::lexer::TokenType::Eof { break; }
        got.push(t);
    }

    assert_eq!(got.len(), 1usize, "token count mismatch");
    assert_eq!(got[0].ttype, sls::lexer::TokenType::Ident);
        assert_eq!(got[0].lexeme, "Point");
}

#[test]
fn test_identifier_literal_trait_addable() {
    let src = "::Addable";
    let mut lexer = sls::lexer::Lexer::new(src);
    let mut got = vec![];
    loop {
        let t = lexer.next_token();
        if t.ttype == sls::lexer::TokenType::Eof { break; }
        got.push(t);
    }

    assert_eq!(got.len(), 1usize, "token count mismatch");
    assert_eq!(got[0].ttype, sls::lexer::TokenType::Ident);
        assert_eq!(got[0].lexeme, "Addable");
}

#[test]
fn test_identifier_literal_trait_drawable() {
    let src = "::Drawable";
    let mut lexer = sls::lexer::Lexer::new(src);
    let mut got = vec![];
    loop {
        let t = lexer.next_token();
        if t.ttype == sls::lexer::TokenType::Eof { break; }
        got.push(t);
    }

    assert_eq!(got.len(), 1usize, "token count mismatch");
    assert_eq!(got[0].ttype, sls::lexer::TokenType::Ident);
        assert_eq!(got[0].lexeme, "Drawable");
}

#[test]
fn test_identifier_literal_field_x() {
    let src = "::x";
    let mut lexer = sls::lexer::Lexer::new(src);
    let mut got = vec![];
    loop {
        let t = lexer.next_token();
        if t.ttype == sls::lexer::TokenType::Eof { break; }
        got.push(t);
    }

    assert_eq!(got.len(), 1usize, "token count mismatch");
    assert_eq!(got[0].ttype, sls::lexer::TokenType::Ident);
        assert_eq!(got[0].lexeme, "x");
}

#[test]
fn test_identifier_literal_field_width() {
    let src = "::width";
    let mut lexer = sls::lexer::Lexer::new(src);
    let mut got = vec![];
    loop {
        let t = lexer.next_token();
        if t.ttype == sls::lexer::TokenType::Eof { break; }
        got.push(t);
    }

    assert_eq!(got.len(), 1usize, "token count mismatch");
    assert_eq!(got[0].ttype, sls::lexer::TokenType::Ident);
        assert_eq!(got[0].lexeme, "width");
}

#[test]
fn test_identifier_literal_with_underscore() {
    let src = "::_private";
    let mut lexer = sls::lexer::Lexer::new(src);
    let mut got = vec![];
    loop {
        let t = lexer.next_token();
        if t.ttype == sls::lexer::TokenType::Eof { break; }
        got.push(t);
    }

    assert_eq!(got.len(), 1usize, "token count mismatch");
    assert_eq!(got[0].ttype, sls::lexer::TokenType::Ident);
        assert_eq!(got[0].lexeme, "_private");
}

#[test]
fn test_identifier_literal_multiple_underscores() {
    let src = "::my_long_name";
    let mut lexer = sls::lexer::Lexer::new(src);
    let mut got = vec![];
    loop {
        let t = lexer.next_token();
        if t.ttype == sls::lexer::TokenType::Eof { break; }
        got.push(t);
    }

    assert_eq!(got.len(), 1usize, "token count mismatch");
    assert_eq!(got[0].ttype, sls::lexer::TokenType::Ident);
        assert_eq!(got[0].lexeme, "my_long_name");
}

#[test]
fn test_identifier_literal_with_numbers() {
    let src = "::var123";
    let mut lexer = sls::lexer::Lexer::new(src);
    let mut got = vec![];
    loop {
        let t = lexer.next_token();
        if t.ttype == sls::lexer::TokenType::Eof { break; }
        got.push(t);
    }

    assert_eq!(got.len(), 1usize, "token count mismatch");
    assert_eq!(got[0].ttype, sls::lexer::TokenType::Ident);
        assert_eq!(got[0].lexeme, "var123");
}

#[test]
fn test_identifier_leading_whitespace() {
    let src = "  hello";
    let mut lexer = sls::lexer::Lexer::new(src);
    let mut got = vec![];
    loop {
        let t = lexer.next_token();
        if t.ttype == sls::lexer::TokenType::Eof { break; }
        got.push(t);
    }

    assert_eq!(got.len(), 1usize, "token count mismatch");
    assert_eq!(got[0].ttype, sls::lexer::TokenType::Ident);
        assert_eq!(got[0].lexeme, "hello");
}

#[test]
fn test_identifier_trailing_whitespace() {
    let src = "hello  ";
    let mut lexer = sls::lexer::Lexer::new(src);
    let mut got = vec![];
    loop {
        let t = lexer.next_token();
        if t.ttype == sls::lexer::TokenType::Eof { break; }
        got.push(t);
    }

    assert_eq!(got.len(), 1usize, "token count mismatch");
    assert_eq!(got[0].ttype, sls::lexer::TokenType::Ident);
        assert_eq!(got[0].lexeme, "hello");
}

#[test]
fn test_identifier_both_whitespace() {
    let src = "  hello  ";
    let mut lexer = sls::lexer::Lexer::new(src);
    let mut got = vec![];
    loop {
        let t = lexer.next_token();
        if t.ttype == sls::lexer::TokenType::Eof { break; }
        got.push(t);
    }

    assert_eq!(got.len(), 1usize, "token count mismatch");
    assert_eq!(got[0].ttype, sls::lexer::TokenType::Ident);
        assert_eq!(got[0].lexeme, "hello");
}

#[test]
fn test_identifier_tab_before() {
    let src = "\\thello";
    let mut lexer = sls::lexer::Lexer::new(src);
    let mut got = vec![];
    loop {
        let t = lexer.next_token();
        if t.ttype == sls::lexer::TokenType::Eof { break; }
        got.push(t);
    }

    assert_eq!(got.len(), 1usize, "token count mismatch");
    assert_eq!(got[0].ttype, sls::lexer::TokenType::Ident);
        assert_eq!(got[0].lexeme, "hello");
}

#[test]
fn test_identifier_literal_leading_whitespace() {
    let src = "  ::hello";
    let mut lexer = sls::lexer::Lexer::new(src);
    let mut got = vec![];
    loop {
        let t = lexer.next_token();
        if t.ttype == sls::lexer::TokenType::Eof { break; }
        got.push(t);
    }

    assert_eq!(got.len(), 1usize, "token count mismatch");
    assert_eq!(got[0].ttype, sls::lexer::TokenType::Ident);
        assert_eq!(got[0].lexeme, "hello");
}

#[test]
fn test_identifier_literal_trailing_whitespace() {
    let src = "::hello  ";
    let mut lexer = sls::lexer::Lexer::new(src);
    let mut got = vec![];
    loop {
        let t = lexer.next_token();
        if t.ttype == sls::lexer::TokenType::Eof { break; }
        got.push(t);
    }

    assert_eq!(got.len(), 1usize, "token count mismatch");
    assert_eq!(got[0].ttype, sls::lexer::TokenType::Ident);
        assert_eq!(got[0].lexeme, "hello");
}

#[test]
fn test_identifier_literal_both_whitespace() {
    let src = "  ::hello  ";
    let mut lexer = sls::lexer::Lexer::new(src);
    let mut got = vec![];
    loop {
        let t = lexer.next_token();
        if t.ttype == sls::lexer::TokenType::Eof { break; }
        got.push(t);
    }

    assert_eq!(got.len(), 1usize, "token count mismatch");
    assert_eq!(got[0].ttype, sls::lexer::TokenType::Ident);
        assert_eq!(got[0].lexeme, "hello");
}

#[test]
fn test_identifier_moderate_length() {
    let src = "thisIsAReasonablyLongVariableName";
    let mut lexer = sls::lexer::Lexer::new(src);
    let mut got = vec![];
    loop {
        let t = lexer.next_token();
        if t.ttype == sls::lexer::TokenType::Eof { break; }
        got.push(t);
    }

    assert_eq!(got.len(), 1usize, "token count mismatch");
    assert_eq!(got[0].ttype, sls::lexer::TokenType::Ident);
        assert_eq!(got[0].lexeme, "thisIsAReasonablyLongVariableName");
}

#[test]
fn test_identifier_very_long() {
    let src = "this_is_a_very_long_identifier_name_that_someone_might_use_for_some_reason";
    let mut lexer = sls::lexer::Lexer::new(src);
    let mut got = vec![];
    loop {
        let t = lexer.next_token();
        if t.ttype == sls::lexer::TokenType::Eof { break; }
        got.push(t);
    }

    assert_eq!(got.len(), 1usize, "token count mismatch");
    assert_eq!(got[0].ttype, sls::lexer::TokenType::Ident);
        assert_eq!(got[0].lexeme, "this_is_a_very_long_identifier_name_that_someone_might_use_for_some_reason");
}

#[test]
fn test_identifier_long_with_numbers() {
    let src = "variable_with_many_numbers_123_456_789_000";
    let mut lexer = sls::lexer::Lexer::new(src);
    let mut got = vec![];
    loop {
        let t = lexer.next_token();
        if t.ttype == sls::lexer::TokenType::Eof { break; }
        got.push(t);
    }

    assert_eq!(got.len(), 1usize, "token count mismatch");
    assert_eq!(got[0].ttype, sls::lexer::TokenType::Ident);
        assert_eq!(got[0].lexeme, "variable_with_many_numbers_123_456_789_000");
}

#[test]
fn test_identifier_starting_with_number() {
    let src = "123abc";
    let mut lexer = sls::lexer::Lexer::new(src);
    let mut got = vec![];
    loop {
        let t = lexer.next_token();
        if t.ttype == sls::lexer::TokenType::Eof { break; }
        got.push(t);
    }

    assert_eq!(got.len(), 1usize, "token count mismatch");
    assert_eq!(got[0].ttype, sls::lexer::TokenType::Illegal);
}

#[test]
fn test_identifier_with_octothorpe() {
    let src = "my#var";
    let mut lexer = sls::lexer::Lexer::new(src);
    let mut got = vec![];
    loop {
        let t = lexer.next_token();
        if t.ttype == sls::lexer::TokenType::Eof { break; }
        got.push(t);
    }

    assert_eq!(got.len(), 1usize, "token count mismatch");
    assert_eq!(got[0].ttype, sls::lexer::TokenType::Ident);
        assert_eq!(got[0].lexeme, "my");
}

#[test]
fn test_identifier_with_colon() {
    let src = "my:var";
    let mut lexer = sls::lexer::Lexer::new(src);
    let mut got = vec![];
    loop {
        let t = lexer.next_token();
        if t.ttype == sls::lexer::TokenType::Eof { break; }
        got.push(t);
    }

    assert_eq!(got.len(), 1usize, "token count mismatch");
    assert_eq!(got[0].ttype, sls::lexer::TokenType::Illegal);
}

#[test]
fn test_identifier_double_colon_inside() {
    let src = "my::var";
    let mut lexer = sls::lexer::Lexer::new(src);
    let mut got = vec![];
    loop {
        let t = lexer.next_token();
        if t.ttype == sls::lexer::TokenType::Eof { break; }
        got.push(t);
    }

    assert_eq!(got.len(), 1usize, "token count mismatch");
    assert_eq!(got[0].ttype, sls::lexer::TokenType::Illegal);
}

#[test]
fn test_identifier_only_numbers() {
    let src = "123";
    let mut lexer = sls::lexer::Lexer::new(src);
    let mut got = vec![];
    loop {
        let t = lexer.next_token();
        if t.ttype == sls::lexer::TokenType::Eof { break; }
        got.push(t);
    }

    assert_eq!(got.len(), 1usize, "token count mismatch");
    assert_eq!(got[0].ttype, sls::lexer::TokenType::Int);
        assert!(got[0].numeric.is_some(), "expected numeric value");
        assert_eq!(got[0].numeric.unwrap(), 123);
}

#[test]
fn test_identifier_literal_empty() {
    let src = "::";
    let mut lexer = sls::lexer::Lexer::new(src);
    let mut got = vec![];
    loop {
        let t = lexer.next_token();
        if t.ttype == sls::lexer::TokenType::Eof { break; }
        got.push(t);
    }

    assert_eq!(got.len(), 1usize, "token count mismatch");
    assert_eq!(got[0].ttype, sls::lexer::TokenType::Illegal);
}

#[test]
fn test_identifier_case_lower() {
    let src = "variable";
    let mut lexer = sls::lexer::Lexer::new(src);
    let mut got = vec![];
    loop {
        let t = lexer.next_token();
        if t.ttype == sls::lexer::TokenType::Eof { break; }
        got.push(t);
    }

    assert_eq!(got.len(), 1usize, "token count mismatch");
    assert_eq!(got[0].ttype, sls::lexer::TokenType::Ident);
        assert_eq!(got[0].lexeme, "variable");
}

#[test]
fn test_identifier_case_upper() {
    let src = "VARIABLE";
    let mut lexer = sls::lexer::Lexer::new(src);
    let mut got = vec![];
    loop {
        let t = lexer.next_token();
        if t.ttype == sls::lexer::TokenType::Eof { break; }
        got.push(t);
    }

    assert_eq!(got.len(), 1usize, "token count mismatch");
    assert_eq!(got[0].ttype, sls::lexer::TokenType::Ident);
        assert_eq!(got[0].lexeme, "VARIABLE");
}

#[test]
fn test_identifier_case_mixed() {
    let src = "Variable";
    let mut lexer = sls::lexer::Lexer::new(src);
    let mut got = vec![];
    loop {
        let t = lexer.next_token();
        if t.ttype == sls::lexer::TokenType::Eof { break; }
        got.push(t);
    }

    assert_eq!(got.len(), 1usize, "token count mismatch");
    assert_eq!(got[0].ttype, sls::lexer::TokenType::Ident);
        assert_eq!(got[0].lexeme, "Variable");
}

#[test]
fn test_identifier_case_camel() {
    let src = "variableName";
    let mut lexer = sls::lexer::Lexer::new(src);
    let mut got = vec![];
    loop {
        let t = lexer.next_token();
        if t.ttype == sls::lexer::TokenType::Eof { break; }
        got.push(t);
    }

    assert_eq!(got.len(), 1usize, "token count mismatch");
    assert_eq!(got[0].ttype, sls::lexer::TokenType::Ident);
        assert_eq!(got[0].lexeme, "variableName");
}

#[test]
fn test_identifier_case_pascal() {
    let src = "VariableName";
    let mut lexer = sls::lexer::Lexer::new(src);
    let mut got = vec![];
    loop {
        let t = lexer.next_token();
        if t.ttype == sls::lexer::TokenType::Eof { break; }
        got.push(t);
    }

    assert_eq!(got.len(), 1usize, "token count mismatch");
    assert_eq!(got[0].ttype, sls::lexer::TokenType::Ident);
        assert_eq!(got[0].lexeme, "VariableName");
}

#[test]
fn test_identifier_reserved_word_if() {
    let src = "if";
    let mut lexer = sls::lexer::Lexer::new(src);
    let mut got = vec![];
    loop {
        let t = lexer.next_token();
        if t.ttype == sls::lexer::TokenType::Eof { break; }
        got.push(t);
    }

    assert_eq!(got.len(), 1usize, "token count mismatch");
    assert_eq!(got[0].ttype, sls::lexer::TokenType::Ident);
        assert_eq!(got[0].lexeme, "if");
}

#[test]
fn test_identifier_reserved_word_while() {
    let src = "while";
    let mut lexer = sls::lexer::Lexer::new(src);
    let mut got = vec![];
    loop {
        let t = lexer.next_token();
        if t.ttype == sls::lexer::TokenType::Eof { break; }
        got.push(t);
    }

    assert_eq!(got.len(), 1usize, "token count mismatch");
    assert_eq!(got[0].ttype, sls::lexer::TokenType::Ident);
        assert_eq!(got[0].lexeme, "while");
}

#[test]
fn test_identifier_reserved_word_for() {
    let src = "for";
    let mut lexer = sls::lexer::Lexer::new(src);
    let mut got = vec![];
    loop {
        let t = lexer.next_token();
        if t.ttype == sls::lexer::TokenType::Eof { break; }
        got.push(t);
    }

    assert_eq!(got.len(), 1usize, "token count mismatch");
    assert_eq!(got[0].ttype, sls::lexer::TokenType::Ident);
        assert_eq!(got[0].lexeme, "for");
}

#[test]
fn test_identifier_reserved_word_match() {
    let src = "match";
    let mut lexer = sls::lexer::Lexer::new(src);
    let mut got = vec![];
    loop {
        let t = lexer.next_token();
        if t.ttype == sls::lexer::TokenType::Eof { break; }
        got.push(t);
    }

    assert_eq!(got.len(), 1usize, "token count mismatch");
    assert_eq!(got[0].ttype, sls::lexer::TokenType::Ident);
        assert_eq!(got[0].lexeme, "match");
}

#[test]
fn test_identifier_reserved_word_break() {
    let src = "break";
    let mut lexer = sls::lexer::Lexer::new(src);
    let mut got = vec![];
    loop {
        let t = lexer.next_token();
        if t.ttype == sls::lexer::TokenType::Eof { break; }
        got.push(t);
    }

    assert_eq!(got.len(), 1usize, "token count mismatch");
    assert_eq!(got[0].ttype, sls::lexer::TokenType::Ident);
        assert_eq!(got[0].lexeme, "break");
}

#[test]
fn test_identifier_reserved_word_continue() {
    let src = "continue";
    let mut lexer = sls::lexer::Lexer::new(src);
    let mut got = vec![];
    loop {
        let t = lexer.next_token();
        if t.ttype == sls::lexer::TokenType::Eof { break; }
        got.push(t);
    }

    assert_eq!(got.len(), 1usize, "token count mismatch");
    assert_eq!(got[0].ttype, sls::lexer::TokenType::Ident);
        assert_eq!(got[0].lexeme, "continue");
}

#[test]
fn test_identifier_reserved_word_fn() {
    let src = "fn";
    let mut lexer = sls::lexer::Lexer::new(src);
    let mut got = vec![];
    loop {
        let t = lexer.next_token();
        if t.ttype == sls::lexer::TokenType::Eof { break; }
        got.push(t);
    }

    assert_eq!(got.len(), 1usize, "token count mismatch");
    assert_eq!(got[0].ttype, sls::lexer::TokenType::Ident);
        assert_eq!(got[0].lexeme, "fn");
}

#[test]
fn test_identifier_reserved_word_struct() {
    let src = "struct";
    let mut lexer = sls::lexer::Lexer::new(src);
    let mut got = vec![];
    loop {
        let t = lexer.next_token();
        if t.ttype == sls::lexer::TokenType::Eof { break; }
        got.push(t);
    }

    assert_eq!(got.len(), 1usize, "token count mismatch");
    assert_eq!(got[0].ttype, sls::lexer::TokenType::Ident);
        assert_eq!(got[0].lexeme, "struct");
}

#[test]
fn test_identifier_reserved_word_union() {
    let src = "union";
    let mut lexer = sls::lexer::Lexer::new(src);
    let mut got = vec![];
    loop {
        let t = lexer.next_token();
        if t.ttype == sls::lexer::TokenType::Eof { break; }
        got.push(t);
    }

    assert_eq!(got.len(), 1usize, "token count mismatch");
    assert_eq!(got[0].ttype, sls::lexer::TokenType::Ident);
        assert_eq!(got[0].lexeme, "union");
}

#[test]
fn test_identifier_reserved_word_enum() {
    let src = "enum";
    let mut lexer = sls::lexer::Lexer::new(src);
    let mut got = vec![];
    loop {
        let t = lexer.next_token();
        if t.ttype == sls::lexer::TokenType::Eof { break; }
        got.push(t);
    }

    assert_eq!(got.len(), 1usize, "token count mismatch");
    assert_eq!(got[0].ttype, sls::lexer::TokenType::Ident);
        assert_eq!(got[0].lexeme, "enum");
}

#[test]
fn test_identifier_reserved_word_trait() {
    let src = "trait";
    let mut lexer = sls::lexer::Lexer::new(src);
    let mut got = vec![];
    loop {
        let t = lexer.next_token();
        if t.ttype == sls::lexer::TokenType::Eof { break; }
        got.push(t);
    }

    assert_eq!(got.len(), 1usize, "token count mismatch");
    assert_eq!(got[0].ttype, sls::lexer::TokenType::Ident);
        assert_eq!(got[0].lexeme, "trait");
}

#[test]
fn test_identifier_reserved_word_impl() {
    let src = "impl";
    let mut lexer = sls::lexer::Lexer::new(src);
    let mut got = vec![];
    loop {
        let t = lexer.next_token();
        if t.ttype == sls::lexer::TokenType::Eof { break; }
        got.push(t);
    }

    assert_eq!(got.len(), 1usize, "token count mismatch");
    assert_eq!(got[0].ttype, sls::lexer::TokenType::Ident);
        assert_eq!(got[0].lexeme, "impl");
}

#[test]
fn test_identifier_reserved_word_inher() {
    let src = "inher";
    let mut lexer = sls::lexer::Lexer::new(src);
    let mut got = vec![];
    loop {
        let t = lexer.next_token();
        if t.ttype == sls::lexer::TokenType::Eof { break; }
        got.push(t);
    }

    assert_eq!(got.len(), 1usize, "token count mismatch");
    assert_eq!(got[0].ttype, sls::lexer::TokenType::Ident);
        assert_eq!(got[0].lexeme, "inher");
}

#[test]
fn test_identifier_reserved_word_dup() {
    let src = "dup";
    let mut lexer = sls::lexer::Lexer::new(src);
    let mut got = vec![];
    loop {
        let t = lexer.next_token();
        if t.ttype == sls::lexer::TokenType::Eof { break; }
        got.push(t);
    }

    assert_eq!(got.len(), 1usize, "token count mismatch");
    assert_eq!(got[0].ttype, sls::lexer::TokenType::Ident);
        assert_eq!(got[0].lexeme, "dup");
}

#[test]
fn test_identifier_reserved_word_drop() {
    let src = "drop";
    let mut lexer = sls::lexer::Lexer::new(src);
    let mut got = vec![];
    loop {
        let t = lexer.next_token();
        if t.ttype == sls::lexer::TokenType::Eof { break; }
        got.push(t);
    }

    assert_eq!(got.len(), 1usize, "token count mismatch");
    assert_eq!(got[0].ttype, sls::lexer::TokenType::Ident);
        assert_eq!(got[0].lexeme, "drop");
}

#[test]
fn test_identifier_reserved_word_swap() {
    let src = "swap";
    let mut lexer = sls::lexer::Lexer::new(src);
    let mut got = vec![];
    loop {
        let t = lexer.next_token();
        if t.ttype == sls::lexer::TokenType::Eof { break; }
        got.push(t);
    }

    assert_eq!(got.len(), 1usize, "token count mismatch");
    assert_eq!(got[0].ttype, sls::lexer::TokenType::Ident);
        assert_eq!(got[0].lexeme, "swap");
}

#[test]
fn test_identifier_reserved_word_over() {
    let src = "over";
    let mut lexer = sls::lexer::Lexer::new(src);
    let mut got = vec![];
    loop {
        let t = lexer.next_token();
        if t.ttype == sls::lexer::TokenType::Eof { break; }
        got.push(t);
    }

    assert_eq!(got.len(), 1usize, "token count mismatch");
    assert_eq!(got[0].ttype, sls::lexer::TokenType::Ident);
        assert_eq!(got[0].lexeme, "over");
}

#[test]
fn test_identifier_reserved_word_rot() {
    let src = "rot";
    let mut lexer = sls::lexer::Lexer::new(src);
    let mut got = vec![];
    loop {
        let t = lexer.next_token();
        if t.ttype == sls::lexer::TokenType::Eof { break; }
        got.push(t);
    }

    assert_eq!(got.len(), 1usize, "token count mismatch");
    assert_eq!(got[0].ttype, sls::lexer::TokenType::Ident);
        assert_eq!(got[0].lexeme, "rot");
}

#[test]
fn test_identifier_reserved_word_pick() {
    let src = "pick";
    let mut lexer = sls::lexer::Lexer::new(src);
    let mut got = vec![];
    loop {
        let t = lexer.next_token();
        if t.ttype == sls::lexer::TokenType::Eof { break; }
        got.push(t);
    }

    assert_eq!(got.len(), 1usize, "token count mismatch");
    assert_eq!(got[0].ttype, sls::lexer::TokenType::Ident);
        assert_eq!(got[0].lexeme, "pick");
}

#[test]
fn test_identifier_reserved_word_roll() {
    let src = "roll";
    let mut lexer = sls::lexer::Lexer::new(src);
    let mut got = vec![];
    loop {
        let t = lexer.next_token();
        if t.ttype == sls::lexer::TokenType::Eof { break; }
        got.push(t);
    }

    assert_eq!(got.len(), 1usize, "token count mismatch");
    assert_eq!(got[0].ttype, sls::lexer::TokenType::Ident);
        assert_eq!(got[0].lexeme, "roll");
}

#[test]
fn test_identifier_reserved_word_depth() {
    let src = "depth";
    let mut lexer = sls::lexer::Lexer::new(src);
    let mut got = vec![];
    loop {
        let t = lexer.next_token();
        if t.ttype == sls::lexer::TokenType::Eof { break; }
        got.push(t);
    }

    assert_eq!(got.len(), 1usize, "token count mismatch");
    assert_eq!(got[0].ttype, sls::lexer::TokenType::Ident);
        assert_eq!(got[0].lexeme, "depth");
}

#[test]
fn test_bool_true() {
    let src = "true";
    let mut lexer = sls::lexer::Lexer::new(src);
    let mut got = vec![];
    loop {
        let t = lexer.next_token();
        if t.ttype == sls::lexer::TokenType::Eof { break; }
        got.push(t);
    }

    assert_eq!(got.len(), 1usize, "token count mismatch");
    assert_eq!(got[0].ttype, sls::lexer::TokenType::Ident);
        assert_eq!(got[0].lexeme, "true");
}

#[test]
fn test_bool_false() {
    let src = "false";
    let mut lexer = sls::lexer::Lexer::new(src);
    let mut got = vec![];
    loop {
        let t = lexer.next_token();
        if t.ttype == sls::lexer::TokenType::Eof { break; }
        got.push(t);
    }

    assert_eq!(got.len(), 1usize, "token count mismatch");
    assert_eq!(got[0].ttype, sls::lexer::TokenType::Ident);
        assert_eq!(got[0].lexeme, "false");
}

#[test]
fn test_bool_true_leading_whitespace() {
    let src = "  true";
    let mut lexer = sls::lexer::Lexer::new(src);
    let mut got = vec![];
    loop {
        let t = lexer.next_token();
        if t.ttype == sls::lexer::TokenType::Eof { break; }
        got.push(t);
    }

    assert_eq!(got.len(), 1usize, "token count mismatch");
    assert_eq!(got[0].ttype, sls::lexer::TokenType::Ident);
        assert_eq!(got[0].lexeme, "true");
}

#[test]
fn test_bool_true_trailing_whitespace() {
    let src = "true  ";
    let mut lexer = sls::lexer::Lexer::new(src);
    let mut got = vec![];
    loop {
        let t = lexer.next_token();
        if t.ttype == sls::lexer::TokenType::Eof { break; }
        got.push(t);
    }

    assert_eq!(got.len(), 1usize, "token count mismatch");
    assert_eq!(got[0].ttype, sls::lexer::TokenType::Ident);
        assert_eq!(got[0].lexeme, "true");
}

#[test]
fn test_bool_true_both_whitespace() {
    let src = "  true  ";
    let mut lexer = sls::lexer::Lexer::new(src);
    let mut got = vec![];
    loop {
        let t = lexer.next_token();
        if t.ttype == sls::lexer::TokenType::Eof { break; }
        got.push(t);
    }

    assert_eq!(got.len(), 1usize, "token count mismatch");
    assert_eq!(got[0].ttype, sls::lexer::TokenType::Ident);
        assert_eq!(got[0].lexeme, "true");
}

#[test]
fn test_bool_true_tab_before() {
    let src = "\\ttrue";
    let mut lexer = sls::lexer::Lexer::new(src);
    let mut got = vec![];
    loop {
        let t = lexer.next_token();
        if t.ttype == sls::lexer::TokenType::Eof { break; }
        got.push(t);
    }

    assert_eq!(got.len(), 1usize, "token count mismatch");
    assert_eq!(got[0].ttype, sls::lexer::TokenType::Ident);
        assert_eq!(got[0].lexeme, "true");
}

#[test]
fn test_bool_false_leading_whitespace() {
    let src = "  false";
    let mut lexer = sls::lexer::Lexer::new(src);
    let mut got = vec![];
    loop {
        let t = lexer.next_token();
        if t.ttype == sls::lexer::TokenType::Eof { break; }
        got.push(t);
    }

    assert_eq!(got.len(), 1usize, "token count mismatch");
    assert_eq!(got[0].ttype, sls::lexer::TokenType::Ident);
        assert_eq!(got[0].lexeme, "false");
}

#[test]
fn test_bool_false_trailing_whitespace() {
    let src = "false  ";
    let mut lexer = sls::lexer::Lexer::new(src);
    let mut got = vec![];
    loop {
        let t = lexer.next_token();
        if t.ttype == sls::lexer::TokenType::Eof { break; }
        got.push(t);
    }

    assert_eq!(got.len(), 1usize, "token count mismatch");
    assert_eq!(got[0].ttype, sls::lexer::TokenType::Ident);
        assert_eq!(got[0].lexeme, "false");
}

#[test]
fn test_bool_false_both_whitespace() {
    let src = "  false  ";
    let mut lexer = sls::lexer::Lexer::new(src);
    let mut got = vec![];
    loop {
        let t = lexer.next_token();
        if t.ttype == sls::lexer::TokenType::Eof { break; }
        got.push(t);
    }

    assert_eq!(got.len(), 1usize, "token count mismatch");
    assert_eq!(got[0].ttype, sls::lexer::TokenType::Ident);
        assert_eq!(got[0].lexeme, "false");
}

#[test]
fn test_bool_false_tab_before() {
    let src = "\\tfalse";
    let mut lexer = sls::lexer::Lexer::new(src);
    let mut got = vec![];
    loop {
        let t = lexer.next_token();
        if t.ttype == sls::lexer::TokenType::Eof { break; }
        got.push(t);
    }

    assert_eq!(got.len(), 1usize, "token count mismatch");
    assert_eq!(got[0].ttype, sls::lexer::TokenType::Ident);
        assert_eq!(got[0].lexeme, "false");
}

#[test]
fn test_bool_true_capitalized() {
    let src = "True";
    let mut lexer = sls::lexer::Lexer::new(src);
    let mut got = vec![];
    loop {
        let t = lexer.next_token();
        if t.ttype == sls::lexer::TokenType::Eof { break; }
        got.push(t);
    }

    assert_eq!(got.len(), 1usize, "token count mismatch");
    assert_eq!(got[0].ttype, sls::lexer::TokenType::Ident);
        assert_eq!(got[0].lexeme, "True");
}

#[test]
fn test_bool_false_capitalized() {
    let src = "False";
    let mut lexer = sls::lexer::Lexer::new(src);
    let mut got = vec![];
    loop {
        let t = lexer.next_token();
        if t.ttype == sls::lexer::TokenType::Eof { break; }
        got.push(t);
    }

    assert_eq!(got.len(), 1usize, "token count mismatch");
    assert_eq!(got[0].ttype, sls::lexer::TokenType::Ident);
        assert_eq!(got[0].lexeme, "False");
}

#[test]
fn test_bool_true_all_caps() {
    let src = "TRUE";
    let mut lexer = sls::lexer::Lexer::new(src);
    let mut got = vec![];
    loop {
        let t = lexer.next_token();
        if t.ttype == sls::lexer::TokenType::Eof { break; }
        got.push(t);
    }

    assert_eq!(got.len(), 1usize, "token count mismatch");
    assert_eq!(got[0].ttype, sls::lexer::TokenType::Ident);
        assert_eq!(got[0].lexeme, "TRUE");
}

#[test]
fn test_bool_false_all_caps() {
    let src = "FALSE";
    let mut lexer = sls::lexer::Lexer::new(src);
    let mut got = vec![];
    loop {
        let t = lexer.next_token();
        if t.ttype == sls::lexer::TokenType::Eof { break; }
        got.push(t);
    }

    assert_eq!(got.len(), 1usize, "token count mismatch");
    assert_eq!(got[0].ttype, sls::lexer::TokenType::Ident);
        assert_eq!(got[0].lexeme, "FALSE");
}

#[test]
fn test_bool_true_mixed_case() {
    let src = "tRuE";
    let mut lexer = sls::lexer::Lexer::new(src);
    let mut got = vec![];
    loop {
        let t = lexer.next_token();
        if t.ttype == sls::lexer::TokenType::Eof { break; }
        got.push(t);
    }

    assert_eq!(got.len(), 1usize, "token count mismatch");
    assert_eq!(got[0].ttype, sls::lexer::TokenType::Ident);
        assert_eq!(got[0].lexeme, "tRuE");
}

#[test]
fn test_bool_false_mixed_case() {
    let src = "fAlSe";
    let mut lexer = sls::lexer::Lexer::new(src);
    let mut got = vec![];
    loop {
        let t = lexer.next_token();
        if t.ttype == sls::lexer::TokenType::Eof { break; }
        got.push(t);
    }

    assert_eq!(got.len(), 1usize, "token count mismatch");
    assert_eq!(got[0].ttype, sls::lexer::TokenType::Ident);
        assert_eq!(got[0].lexeme, "fAlSe");
}

#[test]
fn test_bool_numeric_1() {
    let src = "1";
    let mut lexer = sls::lexer::Lexer::new(src);
    let mut got = vec![];
    loop {
        let t = lexer.next_token();
        if t.ttype == sls::lexer::TokenType::Eof { break; }
        got.push(t);
    }

    assert_eq!(got.len(), 1usize, "token count mismatch");
    assert_eq!(got[0].ttype, sls::lexer::TokenType::Int);
        assert!(got[0].numeric.is_some(), "expected numeric value");
        assert_eq!(got[0].numeric.unwrap(), 1);
}

#[test]
fn test_bool_numeric_0() {
    let src = "0";
    let mut lexer = sls::lexer::Lexer::new(src);
    let mut got = vec![];
    loop {
        let t = lexer.next_token();
        if t.ttype == sls::lexer::TokenType::Eof { break; }
        got.push(t);
    }

    assert_eq!(got.len(), 1usize, "token count mismatch");
    assert_eq!(got[0].ttype, sls::lexer::TokenType::Int);
        assert!(got[0].numeric.is_some(), "expected numeric value");
        assert_eq!(got[0].numeric.unwrap(), 0);
}

#[test]
fn test_bool_yes() {
    let src = "yes";
    let mut lexer = sls::lexer::Lexer::new(src);
    let mut got = vec![];
    loop {
        let t = lexer.next_token();
        if t.ttype == sls::lexer::TokenType::Eof { break; }
        got.push(t);
    }

    assert_eq!(got.len(), 1usize, "token count mismatch");
    assert_eq!(got[0].ttype, sls::lexer::TokenType::Ident);
        assert_eq!(got[0].lexeme, "yes");
}

#[test]
fn test_bool_no() {
    let src = "no";
    let mut lexer = sls::lexer::Lexer::new(src);
    let mut got = vec![];
    loop {
        let t = lexer.next_token();
        if t.ttype == sls::lexer::TokenType::Eof { break; }
        got.push(t);
    }

    assert_eq!(got.len(), 1usize, "token count mismatch");
    assert_eq!(got[0].ttype, sls::lexer::TokenType::Ident);
        assert_eq!(got[0].lexeme, "no");
}

#[test]
fn test_bool_typo_ture() {
    let src = "ture";
    let mut lexer = sls::lexer::Lexer::new(src);
    let mut got = vec![];
    loop {
        let t = lexer.next_token();
        if t.ttype == sls::lexer::TokenType::Eof { break; }
        got.push(t);
    }

    assert_eq!(got.len(), 1usize, "token count mismatch");
    assert_eq!(got[0].ttype, sls::lexer::TokenType::Ident);
        assert_eq!(got[0].lexeme, "ture");
}

#[test]
fn test_bool_typo_flase() {
    let src = "flase";
    let mut lexer = sls::lexer::Lexer::new(src);
    let mut got = vec![];
    loop {
        let t = lexer.next_token();
        if t.ttype == sls::lexer::TokenType::Eof { break; }
        got.push(t);
    }

    assert_eq!(got.len(), 1usize, "token count mismatch");
    assert_eq!(got[0].ttype, sls::lexer::TokenType::Ident);
        assert_eq!(got[0].lexeme, "flase");
}

#[test]
fn test_bool_multiple_true_false() {
    let src = "true false";
    let mut lexer = sls::lexer::Lexer::new(src);
    let mut got = vec![];
    loop {
        let t = lexer.next_token();
        if t.ttype == sls::lexer::TokenType::Eof { break; }
        got.push(t);
    }

    assert_eq!(got.len(), 2usize, "token count mismatch");
    assert_eq!(got[0].ttype, sls::lexer::TokenType::Ident);
        assert_eq!(got[0].lexeme, "true");
    assert_eq!(got[1].ttype, sls::lexer::TokenType::Ident);
        assert_eq!(got[1].lexeme, "false");
}

#[test]
fn test_bool_multiple_same() {
    let src = "true true";
    let mut lexer = sls::lexer::Lexer::new(src);
    let mut got = vec![];
    loop {
        let t = lexer.next_token();
        if t.ttype == sls::lexer::TokenType::Eof { break; }
        got.push(t);
    }

    assert_eq!(got.len(), 2usize, "token count mismatch");
    assert_eq!(got[0].ttype, sls::lexer::TokenType::Ident);
        assert_eq!(got[0].lexeme, "true");
    assert_eq!(got[1].ttype, sls::lexer::TokenType::Ident);
        assert_eq!(got[1].lexeme, "true");
}

#[test]
fn test_bool_three_values() {
    let src = "true false true";
    let mut lexer = sls::lexer::Lexer::new(src);
    let mut got = vec![];
    loop {
        let t = lexer.next_token();
        if t.ttype == sls::lexer::TokenType::Eof { break; }
        got.push(t);
    }

    assert_eq!(got.len(), 3usize, "token count mismatch");
    assert_eq!(got[0].ttype, sls::lexer::TokenType::Ident);
        assert_eq!(got[0].lexeme, "true");
    assert_eq!(got[1].ttype, sls::lexer::TokenType::Ident);
        assert_eq!(got[1].lexeme, "false");
    assert_eq!(got[2].ttype, sls::lexer::TokenType::Ident);
        assert_eq!(got[2].lexeme, "true");
}

#[test]
fn test_tokenstring_empty() {
    let src = "{ }";
    let mut lexer = sls::lexer::Lexer::new(src);
    let mut got = vec![];
    loop {
        let t = lexer.next_token();
        if t.ttype == sls::lexer::TokenType::Eof { break; }
        got.push(t);
    }

    assert_eq!(got.len(), 1usize, "token count mismatch");
    // token_string check not implemented; received token: {:#?}
        // TODO: implement nested expectations
        // for now just assert we got an Ident or similar
        assert!(!got[0].lexeme.is_empty());
}

#[test]
fn test_tokenstring_single_integer() {
    let src = "{ 42 }";
    let mut lexer = sls::lexer::Lexer::new(src);
    let mut got = vec![];
    loop {
        let t = lexer.next_token();
        if t.ttype == sls::lexer::TokenType::Eof { break; }
        got.push(t);
    }

    assert_eq!(got.len(), 1usize, "token count mismatch");
    // token_string check not implemented; received token: {:#?}
        // TODO: implement nested expectations
        // for now just assert we got an Ident or similar
        assert!(!got[0].lexeme.is_empty());
}

#[test]
fn test_tokenstring_single_identifier() {
    let src = "{ dup }";
    let mut lexer = sls::lexer::Lexer::new(src);
    let mut got = vec![];
    loop {
        let t = lexer.next_token();
        if t.ttype == sls::lexer::TokenType::Eof { break; }
        got.push(t);
    }

    assert_eq!(got.len(), 1usize, "token count mismatch");
    // token_string check not implemented; received token: {:#?}
        // TODO: implement nested expectations
        // for now just assert we got an Ident or similar
        assert!(!got[0].lexeme.is_empty());
}

#[test]
fn test_tokenstring_two_integers() {
    let src = "{ 2 3 }";
    let mut lexer = sls::lexer::Lexer::new(src);
    let mut got = vec![];
    loop {
        let t = lexer.next_token();
        if t.ttype == sls::lexer::TokenType::Eof { break; }
        got.push(t);
    }

    assert_eq!(got.len(), 1usize, "token count mismatch");
    // token_string check not implemented; received token: {:#?}
        // TODO: implement nested expectations
        // for now just assert we got an Ident or similar
        assert!(!got[0].lexeme.is_empty());
}

#[test]
fn test_tokenstring_simple_expression() {
    let src = "{ 2 3 + }";
    let mut lexer = sls::lexer::Lexer::new(src);
    let mut got = vec![];
    loop {
        let t = lexer.next_token();
        if t.ttype == sls::lexer::TokenType::Eof { break; }
        got.push(t);
    }

    assert_eq!(got.len(), 1usize, "token count mismatch");
    // token_string check not implemented; received token: {:#?}
        // TODO: implement nested expectations
        // for now just assert we got an Ident or similar
        assert!(!got[0].lexeme.is_empty());
}

#[test]
fn test_tokenstring_stack_ops() {
    let src = "{ dup * }";
    let mut lexer = sls::lexer::Lexer::new(src);
    let mut got = vec![];
    loop {
        let t = lexer.next_token();
        if t.ttype == sls::lexer::TokenType::Eof { break; }
        got.push(t);
    }

    assert_eq!(got.len(), 1usize, "token count mismatch");
    // token_string check not implemented; received token: {:#?}
        // TODO: implement nested expectations
        // for now just assert we got an Ident or similar
        assert!(!got[0].lexeme.is_empty());
}

#[test]
fn test_tokenstring_integer_literals() {
    let src = "{ 0 42 -10 1000 }";
    let mut lexer = sls::lexer::Lexer::new(src);
    let mut got = vec![];
    loop {
        let t = lexer.next_token();
        if t.ttype == sls::lexer::TokenType::Eof { break; }
        got.push(t);
    }

    assert_eq!(got.len(), 1usize, "token count mismatch");
    // token_string check not implemented; received token: {:#?}
        // TODO: implement nested expectations
        // for now just assert we got an Ident or similar
        assert!(!got[0].lexeme.is_empty());
}

#[test]
fn test_tokenstring_float_literals() {
    let src = "{ 3.14 -2.5 0.0 }";
    let mut lexer = sls::lexer::Lexer::new(src);
    let mut got = vec![];
    loop {
        let t = lexer.next_token();
        if t.ttype == sls::lexer::TokenType::Eof { break; }
        got.push(t);
    }

    assert_eq!(got.len(), 1usize, "token count mismatch");
    // token_string check not implemented; received token: {:#?}
        // TODO: implement nested expectations
        // for now just assert we got an Ident or similar
        assert!(!got[0].lexeme.is_empty());
}

#[test]
fn test_tokenstring_char_literal() {
    let src = "{ 'A' }";
    let mut lexer = sls::lexer::Lexer::new(src);
    let mut got = vec![];
    loop {
        let t = lexer.next_token();
        if t.ttype == sls::lexer::TokenType::Eof { break; }
        got.push(t);
    }

    assert_eq!(got.len(), 1usize, "token count mismatch");
    // token_string check not implemented; received token: {:#?}
        // TODO: implement nested expectations
        // for now just assert we got an Ident or similar
        assert!(!got[0].lexeme.is_empty());
}

#[test]
fn test_tokenstring_boolean_literals() {
    let src = "{ true false }";
    let mut lexer = sls::lexer::Lexer::new(src);
    let mut got = vec![];
    loop {
        let t = lexer.next_token();
        if t.ttype == sls::lexer::TokenType::Eof { break; }
        got.push(t);
    }

    assert_eq!(got.len(), 1usize, "token count mismatch");
    // token_string check not implemented; received token: {:#?}
        // TODO: implement nested expectations
        // for now just assert we got an Ident or similar
        assert!(!got[0].lexeme.is_empty());
}

#[test]
fn test_tokenstring_multiple_identifiers() {
    let src = "{ dup swap over }";
    let mut lexer = sls::lexer::Lexer::new(src);
    let mut got = vec![];
    loop {
        let t = lexer.next_token();
        if t.ttype == sls::lexer::TokenType::Eof { break; }
        got.push(t);
    }

    assert_eq!(got.len(), 1usize, "token count mismatch");
    // token_string check not implemented; received token: {:#?}
        // TODO: implement nested expectations
        // for now just assert we got an Ident or similar
        assert!(!got[0].lexeme.is_empty());
}

#[test]
fn test_tokenstring_identifier_literals() {
    let src = "{ ::x ::y }";
    let mut lexer = sls::lexer::Lexer::new(src);
    let mut got = vec![];
    loop {
        let t = lexer.next_token();
        if t.ttype == sls::lexer::TokenType::Eof { break; }
        got.push(t);
    }

    assert_eq!(got.len(), 1usize, "token count mismatch");
    // token_string check not implemented; received token: {:#?}
        // TODO: implement nested expectations
        // for now just assert we got an Ident or similar
        assert!(!got[0].lexeme.is_empty());
}

#[test]
fn test_tokenstring_mixed_identifiers() {
    let src = "{ ::Point get x swap }";
    let mut lexer = sls::lexer::Lexer::new(src);
    let mut got = vec![];
    loop {
        let t = lexer.next_token();
        if t.ttype == sls::lexer::TokenType::Eof { break; }
        got.push(t);
    }

    assert_eq!(got.len(), 1usize, "token count mismatch");
    // token_string check not implemented; received token: {:#?}
        // TODO: implement nested expectations
        // for now just assert we got an Ident or similar
        assert!(!got[0].lexeme.is_empty());
}

#[test]
fn test_tokenstring_nested_single() {
    let src = "{ { 2 3 + } }";
    let mut lexer = sls::lexer::Lexer::new(src);
    let mut got = vec![];
    loop {
        let t = lexer.next_token();
        if t.ttype == sls::lexer::TokenType::Eof { break; }
        got.push(t);
    }

    assert_eq!(got.len(), 1usize, "token count mismatch");
    // token_string check not implemented; received token: {:#?}
        // TODO: implement nested expectations
        // for now just assert we got an Ident or similar
        assert!(!got[0].lexeme.is_empty());
}

#[test]
fn test_tokenstring_nested_with_others() {
    let src = "{ x { dup * } }";
    let mut lexer = sls::lexer::Lexer::new(src);
    let mut got = vec![];
    loop {
        let t = lexer.next_token();
        if t.ttype == sls::lexer::TokenType::Eof { break; }
        got.push(t);
    }

    assert_eq!(got.len(), 1usize, "token count mismatch");
    // token_string check not implemented; received token: {:#?}
        // TODO: implement nested expectations
        // for now just assert we got an Ident or similar
        assert!(!got[0].lexeme.is_empty());
}

#[test]
fn test_tokenstring_multiple_nested() {
    let src = "{ { 2 3 + } { 4 5 * } }";
    let mut lexer = sls::lexer::Lexer::new(src);
    let mut got = vec![];
    loop {
        let t = lexer.next_token();
        if t.ttype == sls::lexer::TokenType::Eof { break; }
        got.push(t);
    }

    assert_eq!(got.len(), 1usize, "token count mismatch");
    // token_string check not implemented; received token: {:#?}
        // TODO: implement nested expectations
        // for now just assert we got an Ident or similar
        assert!(!got[0].lexeme.is_empty());
}

#[test]
fn test_tokenstring_double_nested() {
    let src = "{ { { 42 } } }";
    let mut lexer = sls::lexer::Lexer::new(src);
    let mut got = vec![];
    loop {
        let t = lexer.next_token();
        if t.ttype == sls::lexer::TokenType::Eof { break; }
        got.push(t);
    }

    assert_eq!(got.len(), 1usize, "token count mismatch");
    // token_string check not implemented; received token: {:#?}
        // TODO: implement nested expectations
        // for now just assert we got an Ident or similar
        assert!(!got[0].lexeme.is_empty());
}

#[test]
fn test_tokenstring_complex_nesting() {
    let src = "{ 1 { 2 { 3 } 4 } 5 }";
    let mut lexer = sls::lexer::Lexer::new(src);
    let mut got = vec![];
    loop {
        let t = lexer.next_token();
        if t.ttype == sls::lexer::TokenType::Eof { break; }
        got.push(t);
    }

    assert_eq!(got.len(), 1usize, "token count mismatch");
    // token_string check not implemented; received token: {:#?}
        // TODO: implement nested expectations
        // for now just assert we got an Ident or similar
        assert!(!got[0].lexeme.is_empty());
}

#[test]
fn test_tokenstring_no_whitespace() {
    let src = "{2 3 +}";
    let mut lexer = sls::lexer::Lexer::new(src);
    let mut got = vec![];
    loop {
        let t = lexer.next_token();
        if t.ttype == sls::lexer::TokenType::Eof { break; }
        got.push(t);
    }

    assert_eq!(got.len(), 1usize, "token count mismatch");
    // token_string check not implemented; received token: {:#?}
        // TODO: implement nested expectations
        // for now just assert we got an Ident or similar
        assert!(!got[0].lexeme.is_empty());
}

#[test]
fn test_tokenstring_extra_whitespace() {
    let src = "{   2    3     +   }";
    let mut lexer = sls::lexer::Lexer::new(src);
    let mut got = vec![];
    loop {
        let t = lexer.next_token();
        if t.ttype == sls::lexer::TokenType::Eof { break; }
        got.push(t);
    }

    assert_eq!(got.len(), 1usize, "token count mismatch");
    // token_string check not implemented; received token: {:#?}
        // TODO: implement nested expectations
        // for now just assert we got an Ident or similar
        assert!(!got[0].lexeme.is_empty());
}

#[test]
fn test_tokenstring_leading_whitespace_outside() {
    let src = "   { 2 3 + }";
    let mut lexer = sls::lexer::Lexer::new(src);
    let mut got = vec![];
    loop {
        let t = lexer.next_token();
        if t.ttype == sls::lexer::TokenType::Eof { break; }
        got.push(t);
    }

    assert_eq!(got.len(), 1usize, "token count mismatch");
    // token_string check not implemented; received token: {:#?}
        // TODO: implement nested expectations
        // for now just assert we got an Ident or similar
        assert!(!got[0].lexeme.is_empty());
}

#[test]
fn test_tokenstring_trailing_whitespace_outside() {
    let src = "{ 2 3 + }   ";
    let mut lexer = sls::lexer::Lexer::new(src);
    let mut got = vec![];
    loop {
        let t = lexer.next_token();
        if t.ttype == sls::lexer::TokenType::Eof { break; }
        got.push(t);
    }

    assert_eq!(got.len(), 1usize, "token count mismatch");
    // token_string check not implemented; received token: {:#?}
        // TODO: implement nested expectations
        // for now just assert we got an Ident or similar
        assert!(!got[0].lexeme.is_empty());
}

#[test]
fn test_tokenstring_with_tabs() {
    let src = "{\\t2\\t3\\t+\\t}";
    let mut lexer = sls::lexer::Lexer::new(src);
    let mut got = vec![];
    loop {
        let t = lexer.next_token();
        if t.ttype == sls::lexer::TokenType::Eof { break; }
        got.push(t);
    }

    assert_eq!(got.len(), 1usize, "token count mismatch");
    // token_string check not implemented; received token: {:#?}
        // TODO: implement nested expectations
        // for now just assert we got an Ident or similar
        assert!(!got[0].lexeme.is_empty());
}

#[test]
fn test_tokenstring_multiline_simple() {
    let src = "{\\n    2 3 +\\n}";
    let mut lexer = sls::lexer::Lexer::new(src);
    let mut got = vec![];
    loop {
        let t = lexer.next_token();
        if t.ttype == sls::lexer::TokenType::Eof { break; }
        got.push(t);
    }

    assert_eq!(got.len(), 1usize, "token count mismatch");
    // token_string check not implemented; received token: {:#?}
        // TODO: implement nested expectations
        // for now just assert we got an Ident or similar
        assert!(!got[0].lexeme.is_empty());
}

#[test]
fn test_tokenstring_multiline_multiple() {
    let src = "{\\n    dup\\n    *\\n    2\\n    +\\n}";
    let mut lexer = sls::lexer::Lexer::new(src);
    let mut got = vec![];
    loop {
        let t = lexer.next_token();
        if t.ttype == sls::lexer::TokenType::Eof { break; }
        got.push(t);
    }

    assert_eq!(got.len(), 1usize, "token count mismatch");
    // token_string check not implemented; received token: {:#?}
        // TODO: implement nested expectations
        // for now just assert we got an Ident or similar
        assert!(!got[0].lexeme.is_empty());
}

#[test]
fn test_tokenstring_mixed_line_breaks() {
    let src = "{ 1 2\\n3 4\\n\\n5 6 }";
    let mut lexer = sls::lexer::Lexer::new(src);
    let mut got = vec![];
    loop {
        let t = lexer.next_token();
        if t.ttype == sls::lexer::TokenType::Eof { break; }
        got.push(t);
    }

    assert_eq!(got.len(), 1usize, "token count mismatch");
    // token_string check not implemented; received token: {:#?}
        // TODO: implement nested expectations
        // for now just assert we got an Ident or similar
        assert!(!got[0].lexeme.is_empty());
}

#[test]
fn test_tokenstring_indented_multiline() {
    let src = "{\\n    dup 0 >\\n        { }\\n        { 0 swap - }\\n    if\\n}";
    let mut lexer = sls::lexer::Lexer::new(src);
    let mut got = vec![];
    loop {
        let t = lexer.next_token();
        if t.ttype == sls::lexer::TokenType::Eof { break; }
        got.push(t);
    }

    assert_eq!(got.len(), 1usize, "token count mismatch");
    // token_string check not implemented; received token: {:#?}
        // TODO: implement nested expectations
        // for now just assert we got an Ident or similar
        assert!(!got[0].lexeme.is_empty());
}

#[test]
fn test_tokenstring_comment_end_of_line() {
    let src = "{ 2 3 + // add them\\n}";
    let mut lexer = sls::lexer::Lexer::new(src);
    let mut got = vec![];
    loop {
        let t = lexer.next_token();
        if t.ttype == sls::lexer::TokenType::Eof { break; }
        got.push(t);
    }

    assert_eq!(got.len(), 1usize, "token count mismatch");
    // token_string check not implemented; received token: {:#?}
        // TODO: implement nested expectations
        // for now just assert we got an Ident or similar
        assert!(!got[0].lexeme.is_empty());
}

#[test]
fn test_tokenstring_multiple_comments() {
    let src = "{ 2 // first\\n3 // second\\n+ // add\\n}";
    let mut lexer = sls::lexer::Lexer::new(src);
    let mut got = vec![];
    loop {
        let t = lexer.next_token();
        if t.ttype == sls::lexer::TokenType::Eof { break; }
        got.push(t);
    }

    assert_eq!(got.len(), 1usize, "token count mismatch");
    // token_string check not implemented; received token: {:#?}
        // TODO: implement nested expectations
        // for now just assert we got an Ident or similar
        assert!(!got[0].lexeme.is_empty());
}

#[test]
fn test_tokenstring_comment_own_line() {
    let src = "{\\n    // This is a comment\\n    2 3 +\\n}";
    let mut lexer = sls::lexer::Lexer::new(src);
    let mut got = vec![];
    loop {
        let t = lexer.next_token();
        if t.ttype == sls::lexer::TokenType::Eof { break; }
        got.push(t);
    }

    assert_eq!(got.len(), 1usize, "token count mismatch");
    // token_string check not implemented; received token: {:#?}
        // TODO: implement nested expectations
        // for now just assert we got an Ident or similar
        assert!(!got[0].lexeme.is_empty());
}

#[test]
fn test_tokenstring_comment_at_start() {
    let src = "{ // comment\\n2 3 + }";
    let mut lexer = sls::lexer::Lexer::new(src);
    let mut got = vec![];
    loop {
        let t = lexer.next_token();
        if t.ttype == sls::lexer::TokenType::Eof { break; }
        got.push(t);
    }

    assert_eq!(got.len(), 1usize, "token count mismatch");
    // token_string check not implemented; received token: {:#?}
        // TODO: implement nested expectations
        // for now just assert we got an Ident or similar
        assert!(!got[0].lexeme.is_empty());
}

#[test]
fn test_tokenstring_multiple_comment_lines() {
    let src = "{\\n    // First comment\\n    // Second comment\\n    2 3 +\\n}";
    let mut lexer = sls::lexer::Lexer::new(src);
    let mut got = vec![];
    loop {
        let t = lexer.next_token();
        if t.ttype == sls::lexer::TokenType::Eof { break; }
        got.push(t);
    }

    assert_eq!(got.len(), 1usize, "token count mismatch");
    // token_string check not implemented; received token: {:#?}
        // TODO: implement nested expectations
        // for now just assert we got an Ident or similar
        assert!(!got[0].lexeme.is_empty());
}

#[test]
fn test_tokenstring_comments_nested() {
    let src = "{ { 2 3 + // inner comment\\n} // outer comment\\n}";
    let mut lexer = sls::lexer::Lexer::new(src);
    let mut got = vec![];
    loop {
        let t = lexer.next_token();
        if t.ttype == sls::lexer::TokenType::Eof { break; }
        got.push(t);
    }

    assert_eq!(got.len(), 1usize, "token count mismatch");
    // token_string check not implemented; received token: {:#?}
        // TODO: implement nested expectations
        // for now just assert we got an Ident or similar
        assert!(!got[0].lexeme.is_empty());
}

#[test]
fn test_tokenstring_unclosed() {
    let src = "{ 2 3 +";
    let mut lexer = sls::lexer::Lexer::new(src);
    let mut got = vec![];
    loop {
        let t = lexer.next_token();
        if t.ttype == sls::lexer::TokenType::Eof { break; }
        got.push(t);
    }

    assert_eq!(got.len(), 1usize, "token count mismatch");
    assert_eq!(got[0].ttype, sls::lexer::TokenType::Illegal);
}

#[test]
fn test_tokenstring_unclosed_nested() {
    let src = "{ { 2 3 + }";
    let mut lexer = sls::lexer::Lexer::new(src);
    let mut got = vec![];
    loop {
        let t = lexer.next_token();
        if t.ttype == sls::lexer::TokenType::Eof { break; }
        got.push(t);
    }

    assert_eq!(got.len(), 1usize, "token count mismatch");
    assert_eq!(got[0].ttype, sls::lexer::TokenType::Illegal);
}

#[test]
fn test_tokenstring_extra_closing_brace() {
    let src = "{ 2 3 + } }";
    let mut lexer = sls::lexer::Lexer::new(src);
    let mut got = vec![];
    loop {
        let t = lexer.next_token();
        if t.ttype == sls::lexer::TokenType::Eof { break; }
        got.push(t);
    }

    assert_eq!(got.len(), 2usize, "token count mismatch");
    // token_string check not implemented; received token: {:#?}
        // TODO: implement nested expectations
        // for now just assert we got an Ident or similar
        assert!(!got[0].lexeme.is_empty());
    assert_eq!(got[1].ttype, sls::lexer::TokenType::Illegal);
}

#[test]
fn test_tokenstring_only_closing_brace() {
    let src = "}";
    let mut lexer = sls::lexer::Lexer::new(src);
    let mut got = vec![];
    loop {
        let t = lexer.next_token();
        if t.ttype == sls::lexer::TokenType::Eof { break; }
        got.push(t);
    }

    assert_eq!(got.len(), 1usize, "token count mismatch");
    assert_eq!(got[0].ttype, sls::lexer::TokenType::Illegal);
}

#[test]
fn test_tokenstring_error_inside() {
    let src = "{ 2 3a + }";
    let mut lexer = sls::lexer::Lexer::new(src);
    let mut got = vec![];
    loop {
        let t = lexer.next_token();
        if t.ttype == sls::lexer::TokenType::Eof { break; }
        got.push(t);
    }

    assert_eq!(got.len(), 1usize, "token count mismatch");
    // token_string check not implemented; received token: {:#?}
        // TODO: implement nested expectations
        // for now just assert we got an Ident or similar
        assert!(!got[0].lexeme.is_empty());
}

#[test]
fn test_tokenstring_function_body() {
    let src = "{ dup * }";
    let mut lexer = sls::lexer::Lexer::new(src);
    let mut got = vec![];
    loop {
        let t = lexer.next_token();
        if t.ttype == sls::lexer::TokenType::Eof { break; }
        got.push(t);
    }

    assert_eq!(got.len(), 1usize, "token count mismatch");
    // token_string check not implemented; received token: {:#?}
        // TODO: implement nested expectations
        // for now just assert we got an Ident or similar
        assert!(!got[0].lexeme.is_empty());
}

#[test]
fn test_tokenstring_loop_body() {
    let src = "{ dup print 1 + }";
    let mut lexer = sls::lexer::Lexer::new(src);
    let mut got = vec![];
    loop {
        let t = lexer.next_token();
        if t.ttype == sls::lexer::TokenType::Eof { break; }
        got.push(t);
    }

    assert_eq!(got.len(), 1usize, "token count mismatch");
    // token_string check not implemented; received token: {:#?}
        // TODO: implement nested expectations
        // for now just assert we got an Ident or similar
        assert!(!got[0].lexeme.is_empty());
}

#[test]
fn test_tokenstring_struct_fields() {
    let src = "{ x: y: }";
    let mut lexer = sls::lexer::Lexer::new(src);
    let mut got = vec![];
    loop {
        let t = lexer.next_token();
        if t.ttype == sls::lexer::TokenType::Eof { break; }
        got.push(t);
    }

    assert_eq!(got.len(), 1usize, "token count mismatch");
    // token_string check not implemented; received token: {:#?}
        // TODO: implement nested expectations
        // for now just assert we got an Ident or similar
        assert!(!got[0].lexeme.is_empty());
}

#[test]
fn test_tokenstring_lambda() {
    let src = "{ 2 * }";
    let mut lexer = sls::lexer::Lexer::new(src);
    let mut got = vec![];
    loop {
        let t = lexer.next_token();
        if t.ttype == sls::lexer::TokenType::Eof { break; }
        got.push(t);
    }

    assert_eq!(got.len(), 1usize, "token count mismatch");
    // token_string check not implemented; received token: {:#?}
        // TODO: implement nested expectations
        // for now just assert we got an Ident or similar
        assert!(!got[0].lexeme.is_empty());
}

#[test]
fn test_tokenstring_array_map() {
    let src = "{ dup * }";
    let mut lexer = sls::lexer::Lexer::new(src);
    let mut got = vec![];
    loop {
        let t = lexer.next_token();
        if t.ttype == sls::lexer::TokenType::Eof { break; }
        got.push(t);
    }

    assert_eq!(got.len(), 1usize, "token count mismatch");
    // token_string check not implemented; received token: {:#?}
        // TODO: implement nested expectations
        // for now just assert we got an Ident or similar
        assert!(!got[0].lexeme.is_empty());
}

#[test]
fn test_tokenstring_conditional_complex() {
    let src = "{\\n    dup 0 >\\n        { dup * }\\n        { drop 0 }\\n    if\\n}";
    let mut lexer = sls::lexer::Lexer::new(src);
    let mut got = vec![];
    loop {
        let t = lexer.next_token();
        if t.ttype == sls::lexer::TokenType::Eof { break; }
        got.push(t);
    }

    assert_eq!(got.len(), 1usize, "token count mismatch");
    // token_string check not implemented; received token: {:#?}
        // TODO: implement nested expectations
        // for now just assert we got an Ident or similar
        assert!(!got[0].lexeme.is_empty());
}