Files
sx/examples/1004-errors-try.sx
agra 4e942b5373 test: migrate examples to XXXX-category-name layout + split expected streams
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.
2026-06-01 19:05:15 +03:00

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// First runnable `try` (ERR step E1.4a). The STANDALONE form: a failable
// expression whose failure propagates to the enclosing function's error
// return (Zig-style). `outer` calls `try inner(n)` — on `inner`'s failure
// `outer` returns that error; on success it continues. Both are pure
// failable (`-> !E`). The error-channel tuple ABI for value-carrying
// `-> (T, !)` and `try` in an `or` chain land in ERR E1.4b/E2.
#import "modules/std.sx";
E :: error { Bad, Worse }
inner :: (n: s32) -> !E {
if n < 0 { raise error.Bad; }
return; // success — no error
}
// Propagates inner's error (standalone `try`, target = function return).
outer :: (n: s32) -> !E {
try inner(n);
return;
}
main :: () -> s32 {
bad := outer(-1); // inner raises Bad -> outer propagates
good := outer(7); // inner succeeds -> outer succeeds
r : s32 = 0;
if bad == error.Bad { r = r + 5; } // true -> +5
if good == error.Bad { r = r + 1; } // false (success = no error)
if bad == error.Worse { r = r + 2; } // false (propagated Bad)
print("try result: {}\n", r); // -> 5
return r;
}