Files
sx/examples/0414-protocols-generic-struct-protocol-erase.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

34 lines
1.2 KiB
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// Phase 6 / issue 0054 — generic-struct → parameterized-protocol erasure.
// - A generic-struct impl method `self: *Box` now resolves `self.field` to the
// concrete INSTANCE (the template name binds to the instance type), so
// `self.x` works (was "field not found on type 'Box'").
// - `xx c` erases a generic-struct instance (`Combined__i64_i64`) to a
// parameterized protocol (`VL(i64)`) via the generic
// `impl VL($R) for Combined($R, ..$Ts)`: the thunk monomorphizes the
// template method for the instance and dispatch works (was a trap).
#import "modules/std.sx";
VL :: protocol(T: Type) { get :: () -> T; }
IntCell :: struct { v: i64; }
impl VL(i64) for IntCell { get :: (self: *IntCell) -> i64 => self.v; }
Combined :: struct($R: Type, ..$Ts: []Type) {
sources: (..VL(Ts));
value: $R;
}
impl VL($R) for Combined($R, ..$Ts) { get :: (self: *Combined) -> $R => self.value; }
make :: (..sources: VL) -> VL(i64) {
c : Combined(i64, ..sources.T) = ---;
c.value = 99;
c.sources = (..sources);
return xx c; // Combined__i64_i64 -> VL(i64)
}
main :: () -> i32 {
r := make(IntCell.{ v = 1 });
print("{}\n", r.get()); // 99 (dispatch through the erased Combined)
0
}