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.
43 lines
1.4 KiB
Plaintext
43 lines
1.4 KiB
Plaintext
// `onfail` — cleanup that runs only when an error LEAVES the enclosing block
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// (ERR step E1.7). Unlike `defer` (which runs on every exit), `onfail` fires
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// on an error exit — a `raise` or a propagating `try` — and is skipped on
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// success. On an error exit `defer` and `onfail` run interleaved in reverse
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// declaration order. `onfail (e) { … }` binds the in-flight error tag.
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// (Per-attempt-`try` gating and `or`-chain absorption refine this in E2.4b.)
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#import "modules/std.sx";
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E :: error { Bad }
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inner :: (n: i32) -> !E {
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if n < 0 { raise error.Bad; }
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return;
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}
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// defer + onfail interleave on the error path; only defers on success.
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run :: (n: i32) -> !E {
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defer print("defer A\n");
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onfail print("onfail B\n");
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defer print("defer C\n");
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try inner(n); // n<0 → propagates → onfail fires
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return;
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}
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// `onfail e` binds the tag.
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classify :: (n: i32) -> !E {
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onfail (e) { if e == error.Bad { print("cleanup: bad\n"); } }
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if n < 0 { raise error.Bad; }
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return;
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}
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main :: () -> i32 {
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print("[fail]\n");
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a := run(-1); // error → defer C, onfail B, defer A
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print("[ok]\n");
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b := run(7); // success → defer C, defer A (no onfail)
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print("[bound]\n");
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c := classify(-1); // onfail binding sees Bad
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print("[done]\n");
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return 0;
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}
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