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Screen-Savers
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Implement semantic error handling for duplicate screen declarations

This commit is contained in:
Kyler Olsen 2025-02-10 18:37:30 -07:00
parent 16a3446d48
commit 38ee57547d
1 changed files with 15 additions and 3 deletions
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18
compiler.py
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@ -1673,12 +1673,20 @@ def syntactical_analyzer(tokens: Sequence[Token]) -> File:
# -- Semantics -- # -- Semantics --
# class SemanticsError(CompilerError): class SemanticError(CompilerError):
class SemanticsError(Exception):
_compiler_error_type = "Semantics" _compiler_error_type = "Semantics"
class DuplicateScreen(SemanticError):
def __init__(self, file_info: FileInfo):
super().__init__(
"Duplicate 'screen' declaration.",
file_info,
)
class ContextOperator(Enum): class ContextOperator(Enum):
NoOp = "0" NoOp = "0"
Identifier = "i" Identifier = "i"
@ -1984,13 +1992,17 @@ def semantics_analyzer(file: File) -> Context:
graphs: list[ContextGraph] = [] graphs: list[ContextGraph] = []
for child in file.children: for child in file.children:
if isinstance(child, Screen): if isinstance(child, Screen):
pass if screen is not None:
raise DuplicateScreen(child.file_info)
screen = child
elif isinstance(child, Constant): elif isinstance(child, Constant):
pass pass
elif isinstance(child, Animation): elif isinstance(child, Animation):
pass pass
elif isinstance(child, Graph): elif isinstance(child, Graph):
pass pass
if screen is None:
screen = Screen(file.file_info)
if __name__ == '__main__': if __name__ == '__main__':