Files
sx/examples/0309-closures-literal-as-bare-fn-param.sx
agra d8076b9333 lang: rename signed integer types sN -> iN
Surface rename of the signed integer family: s1..s64 become i1..i64
(u1..u64, usize, isize unchanged). 'string' keeps the s-prefix arm in
name classification; width parsing moves to the i-prefix arm next to
isize.

Internal TypeId tags follow the surface (.s8/.s16/.s32/.s64 ->
.i8/.i16/.i32/.i64), as do mono-key mangle fragments (ptr_i64,
tu_i64_bool) and all display/diagnostic formatting (i{d}).

Migrated in the same sweep: stdlib + examples + issue repros + FFI C
companions (shared symbol names like ffi_id_i64), expected
stdout/stderr/ir snapshots, specs.md, readme.md, CLAUDE.md/AGENTS.md,
implementation_plan.md, docs/, issue writeups. Vendored stb_image and
historical flow state left untouched.

zig build test: 426/426; examples suite: 595/595.
2026-06-12 09:31:53 +03:00

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// Regression (issue 0060): a closure LITERAL passed directly as a bare
// function-type argument `(T) -> U` and then called inside the callee. The
// closure's underlying function takes a hidden env arg that a bare fn-ptr slot
// doesn't pass, so the compiler bridges a capture-free closure to the bare ABI
// with a generated adapter. Both block and arrow bodies. (The working contrast
// where the param is a `Closure(...)` type is examples/0302.)
#import "modules/std.sx";
apply :: (f: (i64) -> i64) -> i64 { return f(5); }
twice :: (f: (i64) -> i64, x: i64) -> i64 { return f(f(x)); }
main :: () {
print("block={}\n", apply(closure((x: i64) -> i64 { return x * 2; }))); // 10
print("arrow={}\n", apply(closure((x: i64) -> i64 => x * 2))); // 10
print("twice={}\n", twice(closure((x: i64) -> i64 => x + 3), 1)); // ((1+3)+3) = 7
}