Files
sx/examples/1005-errors-try-rejections.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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// `try` rejections (ERR step E1.4a):
// - `try` is only valid inside a failable function,
// - the operand must be failable (the sole failable-operand check —
// the parser imposes none),
// - propagating a `try` whose callee's error set is not a subset of the
// caller's named set is rejected (widening at a function-propagation site).
// The positive case lives in `examples/221-try.sx`.
#import "modules/std.sx";
A :: error { Xa }
B :: error { Yb }
ga :: () -> !A { return; }
gb :: () -> !B { return; }
plain :: () -> s32 { return 0; }
// `try` in a non-failable function.
bad_ctx :: () -> s32 {
try ga(); // error: `try` outside a failable function
return 0;
}
// `try` on a non-failable operand.
bad_operand :: () -> !A {
try plain(); // error: operand has type s32 (not failable)
return;
}
// Callee's set (B = {Yb}) is not a subset of the caller's set (A = {Xa}).
widen :: () -> !A {
try gb(); // error: Yb not in caller's error set A
return;
}
main :: () -> s32 {
a := bad_ctx(); // force bad_ctx to lower
b := bad_operand(); // force bad_operand to lower
c := widen(); // force widen to lower
return 0;
}