Files
sx/examples/1410-ffi-jni-call-11-unsupported-return-diag.sx
agra d8076b9333 lang: rename signed integer types sN -> iN
Surface rename of the signed integer family: s1..s64 become i1..i64
(u1..u64, usize, isize unchanged). 'string' keeps the s-prefix arm in
name classification; width parsing moves to the i-prefix arm next to
isize.

Internal TypeId tags follow the surface (.s8/.s16/.s32/.s64 ->
.i8/.i16/.i32/.i64), as do mono-key mangle fragments (ptr_i64,
tu_i64_bool) and all display/diagnostic formatting (i{d}).

Migrated in the same sweep: stdlib + examples + issue repros + FFI C
companions (shared symbol names like ffi_id_i64), expected
stdout/stderr/ir snapshots, specs.md, readme.md, CLAUDE.md/AGENTS.md,
implementation_plan.md, docs/, issue writeups. Vendored stb_image and
historical flow state left untouched.

zig build test: 426/426; examples suite: 595/595.
2026-06-12 09:31:53 +03:00

34 lines
960 B
Plaintext

// 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/i32/i64/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 `i8` (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) -> i8;
}
g_should_call : bool = false;
unused :: (env: *void, b: *Buf) {
#jni_env(env) {
_ := b.get();
}
}
main :: () -> i32 {
if g_should_call {
unused(null, null);
}
0
}