717c35d26d
Cross-module example (main → b → c) referencing c's lib-less C imports transitively. The non-transitive C-import gate (lower/decl.zig c_import_bare) must police the legacy `#foreign` form and the new `extern` keyword IDENTICALLY — same 'C function not visible' diagnostic, not the generic top-level-name wording. Today the extern twin escapes the c_import_bare gate (body is an empty block, not foreign_expr) and is only caught by the general isNameVisible gate, yielding the generic message. Expected snapshot pins the DESIRED equivalent wording; the next commit aligns the gate to green it. Prerequisite for migrating the fn-decl `#foreign` path onto `extern`. 443/444 corpus (1228 xfail), 444 unit.
20 lines
839 B
Plaintext
20 lines
839 B
Plaintext
// `#import` is non-transitive for C-import functions: main imports b,
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// b imports c, so main must NOT see c's lib-less `#foreign` / `extern`
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// C functions directly. Referencing either is rejected by the
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// C-import visibility gate (lower/decl.zig `c_import_bare`).
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//
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// Equivalence lock (FFI-linkage Part B): the legacy `#foreign` form and
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// the new `extern` keyword are two spellings of the same lib-less
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// C-symbol import, so they must produce the SAME "C function not
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// visible" diagnostic — not the generic top-level-name wording. This
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// pins that equivalence as a prerequisite for migrating the fn-decl
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// `#foreign` path onto `extern`.
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#import "modules/std.sx";
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#import "1228-ffi-extern-c-non-transitive/b.sx";
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main :: () -> i32 {
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print("{}\n", c_foreign_abs(-3));
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print("{}\n", c_extern_abs(-4));
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return 0;
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}
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