Files
sx/examples/1023-errors-tag-interpolation.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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// Error-tag `{}` interpolation (ERR step E3 — tag-name table). Formatting an
// error-set value with `{}` renders the tag NAME (`BadDigit`), not the raw id,
// reusing the `any_to_string` dispatch (new `error_set` category → the
// `error_tag_name` builtin → the always-linked tag-name table indexed by global
// tag id). Works for a bound tag, a re-raised/caught tag, and inside text.
#import "modules/std.sx";
E :: error { BadDigit, Empty, Overflow }
parse :: (n: s32) -> (s32, !E) {
if n < 0 { raise error.BadDigit; }
if n == 0 { raise error.Empty; }
return n * 2;
}
main :: () -> s32 {
a : E = error.BadDigit;
b : E = error.Overflow;
print("a={} b={}\n", a, b); // a=BadDigit b=Overflow
// A tag bound by `catch` interpolates too (diverging handler).
v := parse(0) catch e {
print("parse failed with {}\n", e); // parse failed with Empty
return 0;
};
print("v={}\n", v); // not reached (parse(0) raises Empty)
return 0;
}