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.
75 lines
2.8 KiB
Plaintext
75 lines
2.8 KiB
Plaintext
// Multi-value value-carrying failables (ERR — the multi-value error-channel
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// ABI). A `-> (T1, T2, !E)` function returns EITHER a value-tuple OR an error:
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// `return (a, b)` yields the success tuple `{a, b, 0}` (the compiler appends the
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// no-error slot) and `raise error.X` yields `{undef, undef, tag}`. Every consumer
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// generalizes from the single-value shape: a destructure binds every slot
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// INCLUDING the error (dropping it is the spec'd discard error — bind it and
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// inspect); `try` binds the value-tuple on success and propagates `{undef..., tag}`
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// on failure; `catch` / `or` absorb the failure and merge the value-tuple or the
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// handler/terminator value. Single-value `-> (T, !E)` is examples/228-231.
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#import "modules/std.sx";
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E :: error { Bad, Empty }
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parse :: (n: i32) -> (i32, i32, !E) {
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if n < 0 { raise error.Bad; }
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if n == 0 { raise error.Empty; }
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return (n * 2, n + 1); // success → {n*2, n+1, 0}
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}
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// Multi-value `try` in a multi-value caller — propagates {undef, undef, tag}.
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inc :: (n: i32) -> (i32, i32, !E) {
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v, b := try parse(n);
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return (v + 1, b + 1);
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}
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// Multi-value `catch`, bare-expression tuple fallback (absorbs the failure).
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safe :: (n: i32) -> i32 {
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v, b := parse(n) catch (e) (40, 50);
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return v + b;
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}
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// Multi-value `catch` match-body — per-tag dispatch, each arm a value-tuple.
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classify :: (n: i32) -> i32 {
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v, b := parse(n) catch (e) == {
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case .Bad: (1, 1);
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case .Empty: (2, 2);
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else: (9, 9);
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};
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return v + b;
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}
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// Multi-value `or (tuple)` value-terminator (absorbs the failure).
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ortest :: (n: i32) -> i32 {
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v, b := parse(n) or (7, 8);
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return v + b;
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}
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main :: () -> i32 {
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r : i32 = 0;
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// Destructure binds EVERY slot including the error tag (e1 / e2 / e3) —
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// the error is treated, never dropped.
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v1, b1, e1 := parse(5); // success → (10, 6, no-error)
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if !e1 { r = r + v1 + b1; } // success → +16 (slots live only when proven ok)
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v2, b2, e2 := parse(-1); // Bad → {undef, undef, Bad}
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if e2 == error.Bad { r = r + 4; } // +4
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a, c, ea := inc(5); // parse(5)=(10,6) → (11, 7, no-error)
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if !ea { r = r + a + c; } // success → +18
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a2, c2, e3 := inc(-1); // try parse(-1)=Bad → propagate {undef, undef, Bad}
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if e3 == error.Bad { r = r + 5; } // +5
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r = r + safe(5); // (10, 6) → 16
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r = r + safe(-1); // Bad → catch → (40, 50) → 90
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r = r + classify(-1); // Bad → match-body → (1, 1) → 2
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r = r + classify(0); // Empty → match-body → (2, 2) → 4
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r = r + ortest(0); // Empty → or → (7, 8) → 15
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print("multi-value result: {}\n", r); // 16+4+18+5+16+90+2+4+15 = 170
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return r;
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}
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