Made interpreter state json serializable in Rust port

SLS_Rust/sls/Cargo.toml

@@ -6,6 +6,8 @@ edition = "2021"
 [dependencies]
 bitflags = "2.4"
 rand = "0.8"
+serde = { version = "1.0", features = ["derive"] }
+serde_json = "1.0"
 
 [build-dependencies]
 rustc_version = "0.4"

SLS_Rust/sls/src/builtin.rs

@@ -1,4 +1,10 @@
-use crate::interpreter::{InterpreterState, StackValue, FunctionItem};
+use crate::interpreter::{
+    InterpreterState,
+    StackValue,
+    FunctionItem,
+    BuiltinFunction,
+    BuiltinFn,
+};
 use crate::lexer::{Token, Identifier};
 use std::collections::HashMap;
 
@@ -1005,13 +1011,73 @@ pub fn builtin_type_of(state: &mut InterpreterState) -> bool {
     true
 }
 
+pub fn lookup_builtin(name: &str) -> Option<BuiltinFn> {
+    if name == "+" { Some(builtin_addition) }
+    else if name == "-" { Some(builtin_subtraction) }
+    else if name == "*" { Some(builtin_multiplication) }
+    else if name == "/" { Some(builtin_division) }
+    else if name == "%" { Some(builtin_modulus) }
+    else if name == "^" { Some(builtin_exponential) }
+    else if name == ">" { Some(builtin_greater_than) }
+    else if name == ">=" { Some(builtin_greater_than_or_equal_to) }
+    else if name == "<" { Some(builtin_less_than) }
+    else if name == "<=" { Some(builtin_less_than_or_equal_to) }
+    else if name == "==" { Some(builtin_equal_to) }
+    else if name == "!=" { Some(builtin_not_equal_to) }
+    else if name == "abs" { Some(builtin_abs) }
+    else if name == "acos" { Some(builtin_acos) }
+    else if name == "asin" { Some(builtin_asin) }
+    else if name == "atan" { Some(builtin_atan) }
+    else if name == "atan2" { Some(builtin_atan2) }
+    else if name == "ceil" { Some(builtin_ceil) }
+    else if name == "floor" { Some(builtin_floor) }
+    else if name == "round" { Some(builtin_round) }
+    else if name == "sqrt" { Some(builtin_sqrt) }
+    else if name == "sin" { Some(builtin_sin) }
+    else if name == "cos" { Some(builtin_cos) }
+    else if name == "tan" { Some(builtin_tan) }
+    else if name == "ln" { Some(builtin_ln) }
+    else if name == "log" { Some(builtin_log) }
+    else if name == "and" { Some(builtin_and) }
+    else if name == "or" { Some(builtin_or) }
+    else if name == "not" { Some(builtin_not) }
+    else if name == "bitand" { Some(builtin_bitand) }
+    else if name == "bitnot" { Some(builtin_bitnot) }
+    else if name == "bitor" { Some(builtin_bitor) }
+    else if name == "bitxor" { Some(builtin_bitxor) }
+    else if name == "shl" { Some(builtin_shl) }
+    else if name == "shr" { Some(builtin_shr) }
+    else if name == "depth" { Some(builtin_depth) }
+    else if name == "drop" { Some(builtin_drop) }
+    else if name == "dup" { Some(builtin_dup) }
+    else if name == "swap" { Some(builtin_swap) }
+    else if name == "pick" { Some(builtin_pick) }
+    else if name == "roll" { Some(builtin_roll) }
+    else if name == "if" { Some(builtin_if) }
+    else if name == "while" { Some(builtin_while) }
+    else if name == "for" { Some(builtin_for) }
+    else if name == "lambda" { Some(builtin_lambda) }
+    else if name == "eval" { Some(builtin_eval) }
+    else if name == "const" { Some(builtin_const) }
+    else if name == "type_of" { Some(builtin_type_of) }
+    else if name == "rand" { Some(builtin_rand) }
+    else if name == "seed" { Some(builtin_seed) }
+    else { None }
+}
+
 // Helper to add builtin to function table
 fn register_builtin(
     functions: &mut HashMap<String, FunctionItem>,
     name: &str,
     func: fn(&mut InterpreterState) -> bool,
 ) {
-    functions.insert(name.to_string(), FunctionItem::Builtin(func));
+    functions.insert(name.to_string(), FunctionItem::Builtin(BuiltinFunction {
+        name: name.to_string(),
+        function: match lookup_builtin(name) {
+            Some(func) => func,
+            None => panic!("Builtin Not Found!"),
+        }
+    }));
 }
 
 pub fn load_builtins(state: &mut InterpreterState) -> bool {

SLS_Rust/sls/src/interpreter.rs

@@ -1,11 +1,12 @@
 use std::collections::HashMap;
+use serde::{Serialize, Deserialize};
 
 use crate::lexer::*; // Identifier, Token, TokenString, etc.
-use crate::builtin::load_builtins;
+use crate::builtin::{lookup_builtin, load_builtins};
 
 pub type BuiltinFn = fn(&mut InterpreterState) -> bool;
 
-#[derive(Debug, Clone)]
+#[derive(Debug, Clone, Serialize, Deserialize)]
 pub enum StackValue {
     Identifier(Identifier),
 
@@ -31,12 +32,47 @@ pub enum StackValue {
 }
 
 #[derive(Debug, Clone)]
-pub enum FunctionItem {
-    TokenString(TokenString),
-    Builtin(BuiltinFn),
+pub struct BuiltinFunction {
+    pub name: String,
+    pub function: BuiltinFn,
 }
 
-#[derive(Debug)]
+impl BuiltinFunction {
+    fn call(&self, interpreter: &mut InterpreterState) -> bool {
+        (self.function)(interpreter)
+    }
+}
+
+impl Serialize for BuiltinFunction {
+    fn serialize<S>(&self, serializer: S) -> Result<S::Ok, S::Error>
+    where
+        S: serde::Serializer,
+    {
+        serializer.serialize_str(&self.name)
+    }
+}
+
+impl<'de> Deserialize<'de> for BuiltinFunction {
+    fn deserialize<D>(deserializer: D) -> Result<Self, D::Error>
+    where
+        D: serde::Deserializer<'de>,
+    {
+        let name = String::deserialize(deserializer)?;
+
+        let function = lookup_builtin(&name)
+            .ok_or_else(|| serde::de::Error::custom(format!("Unknown builtin: {}", name)))?;
+
+        Ok(BuiltinFunction { name, function })
+    }
+}
+
+#[derive(Debug, Clone, Serialize, Deserialize)]
+pub enum FunctionItem {
+    TokenString(TokenString),
+    Builtin(BuiltinFunction),
+}
+
+#[derive(Debug, Serialize, Deserialize)]
 pub struct InterpreterState {
     pub stack: Vec<StackValue>,
     pub functions: HashMap<String, FunctionItem>,
@@ -96,7 +132,7 @@ impl InterpreterState {
         };
 
         match item {
-            FunctionItem::Builtin(f) => f(self),
+            FunctionItem::Builtin(f) => f.call(self),
             FunctionItem::TokenString(ts) => self.execute_token_string(&ts),
         }
     }

SLS_Rust/sls/src/lexer.rs

@@ -1,3 +1,5 @@
+use serde::{Serialize, Deserialize};
+
 #[derive(Debug, Clone)]
 pub struct LexerInfo {
     pub filename: String,
@@ -60,7 +62,7 @@ impl LexerInfo {
     }
 }
 
-#[derive(Debug, Clone)]
+#[derive(Debug, Clone, Serialize, Deserialize)]
 pub struct Identifier {
     pub name: String,
     pub is_literal: bool,
@@ -93,7 +95,7 @@ pub struct ShapedArray {
     pub _shape: Vec<usize>,
 }
 
-#[derive(Debug, Clone)]
+#[derive(Debug, Clone, Serialize, Deserialize)]
 pub struct TokenString {
     pub tokens: Vec<Token>,
 }
@@ -121,7 +123,7 @@ pub enum StructValue {
     _Token(Token),
 }
 
-#[derive(Debug, Clone)]
+#[derive(Debug, Clone, Serialize, Deserialize)]
 pub enum Token {
     Eof,
     Identifier(Identifier),
@@ -136,10 +138,13 @@ pub enum Token {
     Float(f32),
     Double(f64),
     Character(u8),
+    #[serde(skip)]
     StringLiteral(String),
     Boolean(bool),
+    #[serde(skip)]
     Array(ShapedArray),
     TokenString(TokenString),
+    #[serde(skip)]
     TypeTuple(TypeTuple),
 }
 

SLS_Rust/sls/src/repl.rs

@@ -1,4 +1,6 @@
 use std::io::{self, Write};
+use std::fs;
+use serde_json;
 
 use crate::lexer::{LexerInfo, LexResult, lexical_analysis};
 use crate::print_version;
@@ -62,6 +64,34 @@ pub fn repl() -> i32 {
             return 0;
         }
 
+        if let Some(file) = buf.trim_end().strip_prefix("#save ") {
+            match serde_json::to_string(&interpreter) {
+                Ok(json) => {
+                    if let Err(err) = fs::write(file, json) {
+                        eprintln!("Failed to save state: {}", err);
+                    } else {
+                        println!("State saved to {}", file);
+                    }
+                }
+                Err(err) => eprintln!("Serialization error: {}", err),
+            }
+            continue;
+        }
+
+        if let Some(file) = buf.trim_end().strip_prefix("#load ") {
+            match fs::read_to_string(file) {
+                Ok(json) => match serde_json::from_str(&json) {
+                    Ok(state) => {
+                        interpreter = state;
+                        println!("State restored from {}", file);
+                    }
+                    Err(err) => eprintln!("Deserialization error: {}", err),
+                },
+                Err(err) => eprintln!("Failed to read file: {}", err),
+            }
+            continue;
+        }
+
         let code = buf.clone();
         let mut lexer_info = LexerInfo::new(REPL_FILE_NAME, code.clone());
         let result = lexical_analysis(&mut lexer_info);