rust/tests/ui/unwind-abis/ffi-unwind-calls-lint.rs

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// build-pass
// needs-unwind
#![warn(ffi_unwind_calls)]
mod foo {
#[no_mangle]
pub extern "C-unwind" fn foo() {}
}
extern "C-unwind" {
fn foo();
}
fn main() {
// Call to Rust function is fine.
foo::foo();
// Call to foreign function should warn.
unsafe { foo(); }
//~^ WARNING call to foreign function with FFI-unwind ABI
let ptr: extern "C-unwind" fn() = foo::foo;
// Call to function pointer should also warn.
ptr();
//~^ WARNING call to function pointer with FFI-unwind ABI
}