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Warn about backwards FOR loops with -Wbackwards-for (-Wall)

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Fixes #816
This commit is contained in:
Rangi
2021-03-31 10:00:21 -04:00
parent 3741bd4617
commit 49aac2961d
6 changed files with 29 additions and 6 deletions
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4
src/asm/fstack.c
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@@ -487,6 +487,10 @@ void fstk_RunFor(char const *symName, int32_t start, int32_t stop, int32_t step,
else if (step == 0)
error("FOR cannot have a step value of 0\n");
if ((step > 0 && start > stop) || (step < 0 && start < stop))
warning(WARNING_BACKWARDS_FOR, "FOR goes backwards from %d to %d by %d\n",
start, stop, step);
if (count == 0)
return;
if (!newReptContext(reptLineNo, body, size))