4e942b5373
Rename all example tests/companions to the XXXX-category-test-name scheme (per-category 100-blocks: basic 0010, types 0100, ... errors 1000, diagnostics 1100, ffi 1200, ffi-objc 1300, ffi-jni 1400, vectors 1500, platform 1600). Companions and dir/C fixtures move in lockstep with their parent test; #import/#source/#include paths rewritten to match. Expected output now lives in examples/expected/ (a sibling dir of the tests) split into three streams per the new convention: <name>.exit / <name>.stdout / <name>.stderr (+ optional <name>.ir) run_examples.sh rewritten: scans examples/ and issues/ for an expected/<name>.exit marker, captures stdout and stderr separately (no more 2>&1), compares each stream + exit + optional IR snapshot. Behavior validated unchanged: every renamed test reproduces its prior merged output + exit (diffs limited to file paths/basenames embedded in diagnostics + traces, which correctly reflect the new names). Suite: 292 passed, 0 failed. 50-smoke.sx split + issue relocation + docs follow in subsequent commits.
77 lines
2.8 KiB
Plaintext
77 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: s32) -> (s32, s32, !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: s32) -> (s32, s32, !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: s32) -> s32 {
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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: s32) -> s32 {
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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: s32) -> s32 {
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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 :: () -> s32 {
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r : s32 = 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 == error.Bad { r = r + 1000; } // false
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r = r + v1 + b1; // +16
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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 == error.Bad { r = r + 2000; } // false
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r = r + a + c; // +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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