49 lines
1.4 KiB
C
49 lines
1.4 KiB
C
/**
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* This file is part of the Fun programming language.
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* https://hanez.org/project/fun/
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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 ISC license.
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* https://opensource.org/license/isc-license-txt
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*/
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/**
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* @file slice.c
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* @brief Implements the OP_SLICE opcode for array slicing in the VM.
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*
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* This file handles the OP_SLICE instruction, which creates a new array containing
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* elements from the original array between specified start and end indices.
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*
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* Behavior:
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* - Pops end index, start index, and array from the stack
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* - Creates a new array containing elements from start to end-1
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* - Pushes the new array onto the stack
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*
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* Error Handling:
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* - Exits with error if arguments are wrong types
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* - Handles negative indices and out-of-bounds cases gracefully
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*
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* Example:
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* // Bytecode: OP_SLICE
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* // Stack before: [3, 1, [10,20,30,40]]
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* // Stack after: [[20,30]]
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*
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* @author Johannes Findeisen
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* @date 2025-10-16
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*/
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case OP_SLICE: {
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Value end = pop_value(vm);
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Value start = pop_value(vm);
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Value arr = pop_value(vm);
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if (arr.type != VAL_ARRAY || start.type != VAL_INT || end.type != VAL_INT) {
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fprintf(stderr, "Runtime type error: SLICE expects (array, int, int)\n");
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exit(1);
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}
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Value out = array_slice(&arr, (int)start.i, (int)end.i);
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free_value(arr);
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free_value(start);
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free_value(end);
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push_value(vm, out);
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break;
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}
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