d3944570b9
0156 Part 1: a single-type generic $R (parsed as comptime_pack_ref) used as a type-arg in a pack-fn body (Box($R), size_of(Box($R))) hit a missing arm in resolveTypeWithBindings -> .unresolved -> LLVM panic. Fix: mirror resolveTypeArg's comptime_pack_ref arm (look up type_bindings, else a loud diagnostic). Regression: examples/generics/0216. (Part 2 -- deferred .. spread crashes -- reframed OPEN/non-blocking.) 0157: a user generic ufcs method whose name collides with a stdlib re-export resolved via last-wins fn_ast_map with no receiver filtering, so the wrong overload won, $R never bound, and .unresolved reached LLVM. Fix: selectUfcsGenericByReceiver enumerates all module authors, keeps the receiver-binding ones, picks the most receiver-specific (concrete > bare $T), dedups re-exports, and flags a genuine tie as a deterministic 'ambiguous -- qualify' diagnostic. Regression: examples/generics/0217.
25 lines
1.1 KiB
Plaintext
25 lines
1.1 KiB
Plaintext
// A user generic ufcs method whose name collides with a stdlib re-export must
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// resolve by RECEIVER TYPE, not last-wins. `cancel` here is also re-exported by
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// std.sx (io.sx's `cancel :: ufcs (f: *Future($R))`); calling `(@x).cancel()` on
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// a `*Box(i64)` must pick the user's `cancel(*Box($R))` and bind `$R := i64`.
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//
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// Regression (issue 0157): UFCS dispatch resolved the name via a single
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// last-wins `fn_ast_map` entry with no receiver filtering, so the stdlib
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// `*Future($R)` overload won, `$R` never bound, and `.unresolved` reached LLVM
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// → panic. Fixed by selecting the most receiver-specific binding author across
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// all module authors (src/ir/lower/call.zig `selectUfcsGenericByReceiver`).
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#import "modules/std.sx";
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Box :: struct ($R: Type) { value: R; flag: i64; }
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// Same name as std.sx's re-exported `cancel` (generic ufcs over `*Future($R)`),
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// but a different receiver — the receiver type disambiguates.
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cancel :: ufcs (b: *Box($R)) { b.flag = 1; }
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main :: () -> i64 {
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x : Box(i64) = ---; x.value = 7; x.flag = 0;
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(@x).cancel(); // resolves to the user `cancel` by receiver type
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print("{}\n", x.flag); // 1
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return 0;
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}
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