Files
sx/examples/1410-ffi-jni-call-11-unsupported-return-diag.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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// Regression: when a `#jni_call` method returns a type the
// `Call<T>Method` switch in `emit_llvm.zig` can't dispatch
// (anything outside void/bool/s32/s64/f32/f64/pointer), the
// compiler must emit a DIAGNOSTIC at lower time rather than
// silently producing `LLVMGetUndef` at codegen time. Without
// this guard, the chess Android touch bug shipped: an
// unsupported return type silently became `undef` and showed
// up as garbage arguments downstream.
//
// Here we declare a JNI method returning `s8` (jbyte, not yet
// wired into the call-method switch). The compile must fail
// with a clear message naming the method + return type.
#import "modules/std.sx";
Buf :: #foreign #jni_class("java/nio/ByteBuffer") {
get :: (self: *Self) -> s8;
}
g_should_call : bool = false;
unused :: (env: *void, b: *Buf) {
#jni_env(env) {
_ := b.get();
}
}
main :: () -> s32 {
if g_should_call {
unused(null, null);
}
0;
}