23 lines
583 B
C
23 lines
583 B
C
#include "lisp.h"
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Node *lisp_function_addition(Nodes *args) {
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if (args->count != 2) {
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printf("'+' expects two arguments!\n");
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return NULL;
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}
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if (args->items[0].kind != NODE_KIND_NUMBER ||
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args->items[1].kind != NODE_KIND_NUMBER) {
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printf("'+' can only add numbers, you specified something else!\n");
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return NULL;
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}
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Node *node = malloc(sizeof(Node));
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node->kind = NODE_KIND_NUMBER;
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intptr_t a = args->items[0].as_number;
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intptr_t b = args->items[1].as_number;
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node->as_number = a + b;
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return node;
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}
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