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feat(resolver): add error when re-declaring a variable

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Louis Heredero
2026-02-06 15:09:53 +01:00
parent 4a6c00598f
commit c6eb1ab2c9
1 changed files with 4 additions and 1 deletions
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5
src/interpreter/resolver.py
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@@ -31,7 +31,10 @@ class Resolver(Expr.Visitor[None], Stmt.Visitor[None]):
def declare(self, name: Token) -> None: def declare(self, name: Token) -> None:
if len(self.scopes) == 0: if len(self.scopes) == 0:
return return
self.scopes[-1][name.lexeme] = False scope: dict[str, bool] = self.scopes[-1]
if name.lexeme in scope:
Pebble.token_error(name, "A variable with this name is already declared in this scope.")
scope[name.lexeme] = False
def define(self, name: Token) -> None: def define(self, name: Token) -> None:
if len(self.scopes) == 0: if len(self.scopes) == 0: