b52d424369
git-mv the 10 foreign-named example families to extern/runtime-class names + update every #import/#include/#source ref, stale comment ref, and the 1172 stderr snapshot (path + 'extern symbol' message). Renames: 0729…-foreign→…-extern, 1172-diagnostics- foreign-symbol-conflict→…-extern-symbol-conflict, 1205/1207 ffi-foreign-global→ ffi-extern-global, 1216/1217 ffi-…-foreign-(in-method|result-chain)→…-extern-…, 1219-ffi-foreign→1219-ffi-extern, 1306 objc-foreign-class-chained→objc-runtime-class- chained, 1318 objc-property-foreign→objc-property-extern-class. DEDUP: deleted 1218-ffi-foreign-cvariadic (identical to 1229-ffi-extern-cvariadic; updated 1229's twin ref) + the orphaned 1620 dir. Also purged editors/vscode tmLanguage (#foreign dropped from the directive highlighter) + 1220.h/issues-0030.sx comment refs. Suite green (644 corpus / 443 unit, 0 failed).
33 lines
1.3 KiB
Plaintext
33 lines
1.3 KiB
Plaintext
// Extern data globals via `<name> : <type> extern;`. Lets sx code
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// reference libSystem / framework symbols (NSConcreteStackBlock,
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// __stdinp, etc.) for FFI bridges. Mirrors the long-standing
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// `<fn> :: (...) -> ... extern;` form on the function side.
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//
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// Cross-file dimension (PLAN-FFI step 0.10): the helper companion
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// `1205-ffi-extern-global-helper.sx` ALSO declares `__stdinp : *void extern;`.
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// Both files referencing the same extern symbol must link cleanly —
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// LLVM dedupes the named global, the C linker resolves both refs to
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// the one libSystem symbol.
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//
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// We *don't* check that the helper computes the same address — see
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// issue-0037 (helper-function-scoped `@extern_global` lowers to
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// undef today). When that fixes, fold the helper's address back into
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// the equality check here.
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#import "modules/std.sx";
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#import "1205-ffi-extern-global-helper.sx";
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__stdinp : *void extern;
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main :: () -> i32 {
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addr_bits : u64 = xx @__stdinp;
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print("stdin extern global non-null: {}\n", addr_bits != 0);
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// Force the helper symbol to participate in linking (otherwise the
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// imported file's #extern decl might get dropped by the
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// dead-code stripper). The actual return value is busted today
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// — see issue-0037.
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_ := stdinp_addr_present();
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print("helper file linked: true\n");
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0
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}
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