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#include <assert.h>
#include <stddef.h>
#include <stdio.h>
void println(const char* s) {
puts(s);
fflush(stdout);
}
struct exception {};
struct rust_panic {};
struct drop_check {
bool* ok;
~drop_check() {
println("~drop_check");
if (ok)
*ok = true;
}
};
extern "C" {
void rust_catch_callback(void (*cb)(), bool* rust_ok);
void throw_cxx_exception() {
println("throwing C++ exception");
throw exception();
}
void test_cxx_exception() {
bool rust_ok = false;
try {
rust_catch_callback(throw_cxx_exception, &rust_ok);
assert(false && "unreachable");
} catch (exception e) {
println("caught C++ exception");
assert(rust_ok);
return;
}
assert(false && "did not catch thrown C++ exception");
}
void cxx_catch_callback(void (*cb)(), bool* cxx_ok) {
drop_check x;
x.ok = NULL;
try {
cb();
} catch (rust_panic e) {
assert(false && "shouldn't be able to catch a rust panic");
} catch (...) {
println("caught foreign exception in catch (...)");
// Foreign exceptions are caught by catch (...). We only set the ok
// flag if we successfully caught the panic. The destructor of
// drop_check will then set the flag to true if it is executed.
x.ok = cxx_ok;
throw;
}
}
}
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