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feat(ffi-linkage): reject #foreign + postfix extern/export combo (Phase 4) — 1174 green

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agra
2026-06-14 15:39:27 +03:00
parent dd927c2e94
commit 4101cbc3e7
1 changed files with 10 additions and 5 deletions
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15
src/parser.zig
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@@ -1415,11 +1415,16 @@ pub const Parser = struct {
// unchanged. The legacy prefix `#foreign` form still works via the
// `is_foreign` argument; interplay/diagnostics for combining them is Phase 4.
var is_foreign_eff = is_foreign;
if (self.current.tag == .kw_extern) {
is_foreign_eff = true;
self.advance();
} else if (self.current.tag == .kw_export) {
is_foreign_eff = false;
if (self.current.tag == .kw_extern or self.current.tag == .kw_export) {
// Prefix `#foreign` and the postfix `extern`/`export` keyword are two
// spellings of the same linkage axis — combining them is contradictory
// (`#foreign`=import vs `export`=define) or redundant (`#foreign … extern`).
// Reject at the postfix keyword rather than let it silently override.
if (is_foreign) {
const kw = if (self.current.tag == .kw_export) "export" else "extern";
return self.failFmt("conflicting linkage: prefix '#foreign' cannot be combined with postfix '{s}'; use either '#foreign' or postfix 'extern'/'export', not both", .{kw});
}
is_foreign_eff = self.current.tag == .kw_extern;
self.advance();
}