d8076b9333
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.
63 lines
2.1 KiB
Plaintext
63 lines
2.1 KiB
Plaintext
// Variadic heterogeneous type packs — step 3: type-reflection
|
|
// intrinsics.
|
|
//
|
|
// Three comptime helpers used by pack-fn bodies to branch on
|
|
// type identity / protocol membership:
|
|
//
|
|
// type_name(T) -> string // display name of T
|
|
// type_eq(T1, T2) -> bool // structural TypeId equality
|
|
// has_impl(P, T) -> bool // T has a reachable impl for P
|
|
//
|
|
// All three fold to compile-time constants and are accepted by
|
|
// `tryConstBoolCondition`, so `inline if type_eq(...)` /
|
|
// `inline if has_impl(...)` collapse to a single branch at lower
|
|
// time — no runtime cost.
|
|
//
|
|
// `has_impl`'s protocol arg accepts both shapes:
|
|
// - plain protocol name: `has_impl(Allocator, CAllocator)`.
|
|
// - parameterised call: `has_impl(Wrap(i64), i32)` — the args
|
|
// match the impl's protocol type-args exactly.
|
|
|
|
#import "modules/std.sx";
|
|
#import "modules/std/mem.sx";
|
|
|
|
// User-defined parameterised protocol + an impl, so has_impl can
|
|
// confirm parameterised matching works with a known-true case.
|
|
Wrap :: protocol(Target: Type) {
|
|
wrap :: () -> Target;
|
|
}
|
|
|
|
impl Wrap(i64) for i32 {
|
|
wrap :: (self: i32) -> i64 => xx self;
|
|
}
|
|
|
|
main :: () -> i32 {
|
|
// type_name — display names.
|
|
print("{} {} {}\n", type_name(i64), type_name(string), type_name(bool));
|
|
|
|
// type_eq — structural equality on TypeIds.
|
|
print("{} {} {} {}\n",
|
|
type_eq(i64, i64),
|
|
type_eq(i64, string),
|
|
type_eq(*i64, *i64),
|
|
type_eq(*i64, *i32));
|
|
|
|
// inline-if folds type_eq at lower time.
|
|
inline if type_eq(i64, i64) {
|
|
print("inline-if folded: same\n");
|
|
} else {
|
|
print("inline-if folded: different\n");
|
|
}
|
|
|
|
// has_impl — plain protocol (Allocator is unary).
|
|
print("Allocator/CAllocator: {}\n", has_impl(Allocator, CAllocator));
|
|
print("Allocator/i64: {}\n", has_impl(Allocator, i64));
|
|
|
|
// has_impl — parameterised protocol (Wrap takes a Target type arg).
|
|
print("Wrap(i64)/i32: {}\n", has_impl(Wrap(i64), i32));
|
|
print("Wrap(i64)/bool: {}\n", has_impl(Wrap(i64), bool));
|
|
print("Wrap(bool)/i32: {}\n", has_impl(Wrap(bool), i32));
|
|
|
|
return 0;
|
|
}
|