Files
sx/examples/0104-types-union.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

29 lines
506 B
Plaintext

#import "modules/std.sx";
Overlay :: union {
f: f32;
i: i32;
}
Vec2 :: union {
data: [2]f32;
struct { x, y: f32; };
}
main :: () {
// Basic union: type punning
o :Overlay = ---;
o.f = 3.14;
print("f={}\n", o.f);
print("i={}\n", o.i);
// Union with anonymous struct: member promotion
v :Vec2 = ---;
v.x = 1.0;
v.y = 2.0;
print("x={}\n", v.x);
print("y={}\n", v.y);
print("data[0]={}\n", v.data[0]);
print("data[1]={}\n", v.data[1]);
}