Files
sx/examples/0505-packs-pack-typed-index.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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// Variadic heterogeneous type packs — step 2: typed pack indexing.
//
// `args[$i]` (with `$i` a comptime-known integer) inside a pack-fn
// body should resolve to the i-th call-site argument with its
// CONCRETE type, not the boxed `Any` that today's `[]Any` slice
// path yields. Without typed access, downstream operations on the
// element (field access, typed coercion, passing to a typed slot)
// either fail with "field 'X' not found on type 'Any'" or silently
// box/unbox through Any.
//
// This file pins today's failure: `args[0].x` on a struct-typed
// call arg trips "field 'x' not found on type 'Any'" because the
// AST-level type inference for `args[0]` returns Any.
//
// Next commit teaches `lowerIndexExpr` to detect a pack-name base
// with a comptime-int-literal index and substitute the i-th
// call-site arg's lowered value directly — propagating the call
// arg's real type through field access, typed assignments, and
// further indexing.
#import "modules/std.sx";
Point :: struct { x: s64; y: s64; }
get_x :: (..$args) -> s64 => args[0].x;
main :: () -> s32 {
p := Point.{ x = 7, y = 9 };
n := get_x(p);
print("{}\n", n);
return 0;
}