and.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
 */
 
/**
 * @file and.c
 * @brief Implements the OP_AND opcode for logical AND in the VM.
 *
 * This file handles the OP_AND instruction, which performs a logical AND operation
 * on two boolean values. The values are popped from the stack, and the result is pushed back.
 *
 * Behavior:
 * - Pops two boolean values from the stack.
 * - Performs a logical AND operation.
 * - Pushes the result (1 or 0) onto the stack.
 *
 * Error Handling:
 * - Exits with an error if the operands are not boolean values.
 *
 * Example:
 * - Bytecode: OP_AND
 * - Stack before: [1, 0]
 * - Stack after: [0]
 */
 
case OP_AND: {
  Value b = pop_value(vm);
  Value a = pop_value(vm);
  int res = value_is_truthy(&a) && value_is_truthy(&b);
  free_value(a);
  free_value(b);
  push_value(vm, make_bool(res));
  break;
}