len.c

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/*
 * This file is part of the Fun programming language.
 * https://fun-lang.xyz/
 *
 * Copyright 2025 Johannes Findeisen <you@hanez.org>
 * Licensed under the terms of the Apache-2.0 license.
 * https://opensource.org/license/apache-2-0
 */


case OP_LEN: {
 Value a = pop_value(vm);
 int len = 0;
 if (a.type == VAL_STRING) {
 len = (int)(a.s ? (int)strlen(a.s) : 0);
 } else if (a.type == VAL_ARRAY) {
 len = array_length(&a);
 if (len < 0) len = 0;
 } else {
 /* Be lenient: for non-array/non-string, treat length as 0 */
 push_value(vm, make_int(0));
 }
 free_value(a);
 push_value(vm, make_int(len));
 break;
}