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.
36 lines
1.1 KiB
Plaintext
36 lines
1.1 KiB
Plaintext
// Rejection counterpart to 1046 (ERR step E1.8). Reading a failable's value slot
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// where its error is NOT proven absent is a compile error. Two unproven shapes:
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//
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// (A) reading the value inside the `if err { … }` error path itself
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// (B) reading the value after a bare tag-compare (`if err == error.X`), which
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// narrows the tag but proves nothing about absence
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//
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// Each read is rejected with the E1.8 diagnostic; the program never runs (exit 1).
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#import "modules/std.sx";
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E :: error { Bad }
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parse :: (n: i32) -> (i32, !E) {
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if n < 0 { raise error.Bad; }
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return n * 10;
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}
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// (A) the read sits on the error path — `err` is present here, not absent.
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bad_a :: () -> i32 {
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v, err := parse(5);
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if err { return v; } // REJECTED: err present on this path
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return 0;
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}
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// (B) a tag-compare narrows which error, but does not prove there is none.
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bad_b :: () -> i32 {
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v, err := parse(5);
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if err == error.Bad { return 1; }
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return v; // REJECTED: err not proven absent
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}
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main :: () -> i32 {
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return bad_a() + bad_b();
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}
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