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sx/examples/1348-ffi-objc-extern-class.sx

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// Phase 3.0 (FFI-linkage) — postfix `extern` on an aggregate (`#objc_class`)
// is the new spelling of the legacy prefix `#foreign #objc_class` import.
// Mirrors 1306's foreign-class chained dispatch with the new syntax:
// Name :: #objc_class("X") extern { … } == Name :: #foreign #objc_class("X") { … }
//
// Red until 3.1 wires the postfix-extern aggregate path through the parser
// + lowering (maps `extern` → reference, same as `#foreign`).
#import "modules/std.sx";
#import "modules/build.sx";
NSObject :: #objc_class("NSObject") extern {
alloc :: () -> *NSObject;
init :: (self: *Self) -> *Self;
}
main :: () -> i32 {
inline if OS == .macos {
a := NSObject.alloc().init();
if a != null {
print("extern-class dispatch ok\n");
}
}
inline if OS != .macos {
print("extern-class dispatch ok\n");
}
0
}