impl syntaxerror

youknowone · youknowone · commit f6ded5014469 · 2025-12-26T08:15:46.000+09:00
diff --git a/crates/codegen/src/compile.rs b/crates/codegen/src/compile.rs
@@ -2164,6 +2164,17 @@ impl Compiler {
 
             // Compile exception type
             if let Some(exc_type) = type_ {
+                // Check for unparenthesized tuple (e.g., `except* A, B:` instead of `except* (A, B):`)
+                if let Expr::Tuple(ExprTuple { elts, range, .. }) = exc_type.as_ref() {
+                    if let Some(first) = elts.first() {
+                        // If tuple starts at same column as first element, it's unparenthesized
+                        if range.start().to_u32() == first.range().start().to_u32() {
+                            return Err(self.error(CodegenErrorType::SyntaxError(
+                                "multiple exception types must be parenthesized".to_owned(),
+                            )));
+                        }
+                    }
+                }
                 self.compile_expression(exc_type)?;
             } else {
                 return Err(self.error(CodegenErrorType::SyntaxError(
