Files
sx/examples/0521-packs-pack-builder-smoke.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

49 lines
1.7 KiB
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// Variadic heterogeneous type packs — step 4A end-to-end
// smoke. Exercises the FULL chain step 5's generic
// `Into(Block)` impl needs:
//
// 1. A pack-fn that passes its bound `$args` to a builder
// via `#run` / `#insert` (here `#run` for simplicity).
// 2. The builder receives a `[]Type` slice and walks it,
// calling `type_name(list[i])` per position.
// 3. `type_name(list[i])` is the DYNAMIC form — the index_expr
// argument can't be statically resolved at lower time, so
// the lowering emits a `callBuiltin(.type_name, ...)` that
// the interp's arm handles by reading the runtime
// `Value.type_tag(TypeId)` and returning the per-position
// name.
//
// The smoke demonstrates that step 4's full surface — bare
// `$args` (whole pack as []Type) + dynamic reflection
// intrinsics + per-position type discovery at interp time —
// hangs together end-to-end. This is the foundation step 5's
// builder-driven generic Into(Block) impl rests on.
#import "modules/std.sx";
#import "modules/compiler.sx";
// Generic "describe pack" builder. Receives the pack as
// []Type, returns a joined string with each type's name.
describe :: (..$args) -> string {
list := $args;
s := "[";
i : s64 = 0;
while i < list.len {
if i > 0 { s = concat(s, ", "); }
s = concat(s, type_name(list[i]));
i = i + 1;
}
s = concat(s, "]");
return s;
}
run_all :: () {
print("{}\n", describe()); // []
print("{}\n", describe(42)); // [s64]
print("{}\n", describe(42, "hi")); // [s64, string]
print("{}\n", describe(true, 3.14, "x", 99)); // [bool, f64, string, s64]
}
#run run_all();
main :: () { print("rt\n"); }