51 lines
1.5 KiB
C
51 lines
1.5 KiB
C
/*
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* This file is part of the Fun programming language.
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* https://fun-lang.xyz/
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*
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* Copyright 2025 Johannes Findeisen <you@hanez.org>
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* Licensed under the terms of the Apache-2.0 license.
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* https://opensource.org/license/apache-2-0
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*/
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/**
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* @file set.c
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* @brief Implements the OP_SET opcode for setting elements in arrays in the VM.
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*
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* Handles the OP_SET instruction, which sets a value at a specified index in an array.
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* The value, index, and array are popped from the stack; the value is returned back
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* on the stack (as a copy) to mirror expression semantics.
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*
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* Behavior:
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* - Pops the value, index, and array from the stack.
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* - Sets the value at the specified index in the array.
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* - Pushes a copy of the value back onto the stack.
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*
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* Error Handling:
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* - Exits with a runtime error if the array or index is of the wrong type.
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* - Exits with a runtime error if the index is out of bounds.
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*
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* Example:
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* - Bytecode: OP_SET
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* - Stack before: [42, 1, [10, 20, 30]]
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* - Stack after: [42]
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*/
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case OP_SET: {
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Value v = pop_value(vm);
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Value idx = pop_value(vm);
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Value arr = pop_value(vm);
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if (arr.type != VAL_ARRAY || idx.type != VAL_INT) {
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fprintf(stderr, "Runtime type error: ARR_SET expects (array, int, value)\n");
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exit(1);
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}
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if (!array_set(&arr, (int)idx.i, v)) {
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fprintf(stderr, "Runtime error: set index out of range\n");
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exit(1);
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}
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free_value(arr);
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free_value(idx);
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/* v already owned by array; push copy for return value */
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push_value(vm, copy_value(&v));
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free_value(v);
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break;
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}
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