// export function (FFI-linkage stream, Phase 2): define an sx function with
// the bare `export` linkage modifier — external linkage + C ABI + no sx ctx —
// so a companion C translation unit can call back into it by its plain symbol
// name. The C side (`#source`) declares `sx_square` as a normal `extern int`
// and calls it; sx `main` drives the C side via `call_sx_square`. Mirrors the
// import-direction `extern` examples (1223–1225) for the define direction.
//
// Without `export`, an sx-defined fn is `internal` linkage + carries the
// implicit `__sx_ctx` slot, so the C object can neither resolve nor correctly
// call the symbol — this is the gap `export` fills.
#import "modules/std.sx";

#import c {
    #include "1226-ffi-export-fn.h";
    #source "1226-ffi-export-fn.c";
};

// sx-defined, exported to C: external linkage + C ABI + no implicit ctx.
sx_square :: (n: i32) -> i32 export {
    return n * n;
}

main :: () -> i32 {
    // call_sx_square (C) calls back into sx_square, adds 1.
    print("call_sx_square(6) = {}\n", call_sx_square(6));
    print("call_sx_square(9) = {}\n", call_sx_square(9));
    0
}