Files
sx/examples/0409-protocols-protocol-void-pointer-return.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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// A protocol method declared `-> *void` (literal void-pointer return,
// NOT `Self`) returns the underlying impl's pointer to the caller
// unchanged. The dispatch path must NOT auto-load from the result —
// `*void` outside a `Self`-disguise is a real pointer whose pointee
// size is unknown.
//
// Regression: target_type leaks from the surrounding scope (e.g. the
// enclosing function's return type). The dispatcher used to auto-load
// `sizeof(target_type)` bytes from every `*void` return, mistaking
// real pointers for Self-encoded boxes. Result was that
// `alloc.alloc(64)` through an Allocator protocol value returned the
// first 4 bytes of malloc'd memory interpreted as `s32` (= 0 → null).
#import "modules/std.sx";
#import "modules/allocators.sx";
main :: () -> s32 {
gpa := GPA.init();
alloc : Allocator = xx gpa;
p_direct := gpa.alloc(64);
print("direct: null? {}\n", p_direct == null);
p_protocol := alloc.alloc(64);
print("protocol: null? {}\n", p_protocol == null);
print("alloc_count: {}\n", gpa.alloc_count);
0;
}