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frontend/define.c, ntharg(), #4/15 express some facts

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rlar 2015-11-07 20:22:42 +01:00
parent 71908ef194
commit f538b4dba3
1 changed files with 2 additions and 0 deletions
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2
src/frontend/define.c
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@ -407,8 +407,10 @@ trcopy(struct pnode *tree, char *args, struct pnode *nn)
static struct pnode * static struct pnode *
ntharg(int num, struct pnode *args) ntharg(int num, struct pnode *args)
{ {
// fact: num >= 1 for all known invocations of ntharg()
while (--num > 0) { while (--num > 0) {
if (args && args->pn_op && (args->pn_op->op_num != PT_OP_COMMA)) { if (args && args->pn_op && (args->pn_op->op_num != PT_OP_COMMA)) {
// fact: num >= 1 because of `while' condition
if (num == 1) if (num == 1)
break; break;
return NULL; return NULL;