f49a49cd07
A value binding (local/global `var` or a parameter) spelled as a reserved/builtin type name parses as a `.type_expr` rather than an `.identifier` (parser.zig, via `Type.fromName`), so the address-of family in lower.zig never saw a scoped local and mis-lowered it — loading the aggregate and passing it by value to a `ptr` parameter (LLVM verifier abort, or a silent `*self`-mutation-losing copy). Add a declaration-site diagnostic in semantic_diagnostics.zig (`UnknownTypeChecker.checkBindingName`): reject any parameter name or `var` binding name (`:=` / typed-local / global forms) whose spelling collides with a reserved type name. `isReservedTypeName` defers to the parser's own classifier (`types.Type.fromName`) so the rejected set never drifts from the set that would parse as a type — the named builtins (bool/string/void/f32/f64/usize/isize/Any) and `[su]N` over sx's 1-64 range. Bare value names (`s`, `self`, `index`) are untouched. No lowering special-case; the `.identifier`-only address-of paths are correct once type-shaped names can never be bound. The rejected attempt-1 `bareVarName` approach was never landed. Tests: - 0125-types-type-named-var-rejected: `:=` form (s2) rejected (repurposed from the old test that asserted the now-illegal behavior). - 1119-diagnostics-reserved-type-name-as-identifier: parameter (u8), typed-local (s64, bool), `:=` (string) forms rejected. - 0135-types-self-streaming-nonreserved: positive — `*self` streaming with non-reserved names accumulates correctly via both call styles. - 0904-optionals: renamed incidental locals s1/s2 -> filled/empty.
14 lines
520 B
Plaintext
14 lines
520 B
Plaintext
// A local declared with a reserved/builtin type-name spelling (`s2` is the
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// arbitrary-width `sN` integer type) is rejected at the declaration site.
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// Previously such a name parsed as a `.type_expr`, so address-of sites
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// mis-lowered it (load-by-value to a `ptr` param → LLVM verifier abort, or a
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// silent `*self`-mutation-losing copy). Regression (issue 0076). Expected:
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// error at the declaration; exit 1.
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#import "modules/std.sx";
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main :: () -> s32 {
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s2 := 42;
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print("s2: {}\n", s2);
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return 0;
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}
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