hello_args_return.c

Go to the documentation of this file.

/*
 * This file is part of the Fun programming language.
 * https://fun-lang.xyz/
 *
 * Copyright 2026 Johannes Findeisen <you@hanez.org>
 * Licensed under the terms of the Apache-2.0 license.
 * https://opensource.org/license/apache-2-0
 */


case OP_RUST_HELLO_ARGS_RETURN: {
#ifdef FUN_WITH_RUST
 Value vmsg = pop_value(vm);
 char *msg = value_to_string_alloc(&vmsg);
 free_value(vmsg);
 if (msg) {
 char *ret = fun_rust_echo_string(msg);
 free(msg);
 if (ret) {
 push_value(vm, make_string(ret));
 fun_rust_string_free(ret);
 } else {
 push_value(vm, make_nil());
 }
 } else {
 char *ret = fun_rust_echo_string("");
 if (ret) {
 push_value(vm, make_string(ret));
 fun_rust_string_free(ret);
 } else {
 push_value(vm, make_nil());
 }
 }
#else
 /* Still pop and free the arg to keep stack sane */
 Value vmsg = pop_value(vm);
 free_value(vmsg);
 vm_raise_error(vm, "RUST_HELLO_ARGS_RETURN requires FUN_WITH_RUST=ON at build time");
 push_value(vm, make_nil());
#endif
 break;
}