cb9ef381b5
attempt-6: address Adi's two in-scope findings (#3 deferred to E6). #1 E4-own-author-type-arg (silent-wrong): the bare-TYPE gate returned `.proceed` for the querying source's OWN author, so the non-leaf sites (reflection / type-arg / array-literal / type-value / match arm) dropped it and re-resolved a same-name flat import via global `findByName`. headTypeGate now resolves the own author to ITS per-source TypeId (mirroring selectNominalLeaf's own-wins, 0754); the type-as-value and type-match sites, which only consumed the poison bit and re-resolved globally, now route through the gate and use the `.resolved` author. size_of(Widget) with an own + imported Widget now yields main's own size, not the import's. #2 E4-type-fn-head-ambiguity (silent-wrong): headFnLeak only checked isNameVisible, so two flat same-name type-returning functions both reported "visible" and one was silently instantiated. It now diagnoses >=2 distinct direct flat type-fn authors (no own author) as ambiguous before the isNameVisible short-circuit, consistent with the parameterized struct / protocol heads and the leaf (0755/0767). Own / single / diamond-collapse type-fn heads still resolve. Regressions: 0768 (own-wins at every non-leaf bare-type site, fail-before reflection=16 -> pass-after 8) and 0769 (two flat Make type-fns -> ambiguity diagnostic exit 1). README: own-wins + type-fn-head ambiguity at every bare-type site.
22 lines
1.1 KiB
Plaintext
22 lines
1.1 KiB
Plaintext
// A type-returning FUNCTION head (`Make(s64)` where `Make :: ($T) -> Type`) is
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// NON-transitive AND ambiguity-checked, exactly like the parameterized generic-
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// struct / protocol heads (0767) and the nominal leaf (0755). `main` flat-imports
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// two modules that each author a same-name `Make` type-fn with a different body
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// and authors none itself, so the bare `Make(s64)` head is a genuine collision —
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// it must emit the LOUD "type 'Make' is ambiguous" diagnostic and poison, NEVER
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// silently instantiate whichever single author `fn_ast_map` happens to hold.
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//
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// Regression (Phase E4 attempt-6, finding #2): before `headFnLeak` did bare-call
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// ambiguity selection it only checked `isNameVisible` (both authors ARE visible),
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// so two flat `Make` type-fns silently instantiated one author — `size_of(Make(s64))`
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// printed 16 (a.sx's two-field body) at exit 0 instead of the ambiguity diagnostic.
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#import "modules/std.sx";
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#import "0769-modules-ambiguous-type-fn-head/a.sx";
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#import "0769-modules-ambiguous-type-fn-head/b.sx";
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main :: () -> s32 {
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print("size={}\n", size_of(Make(s64)));
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0
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}
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