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Handle edge cases involving consecutive "zero or" modifiers

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Samuel Moelius 2023-05-20 11:44:56 -04:00 • committed by Amaan Qureshi
parent d9d4116105
commit a07cdb59f3
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GPG key ID: E67890ADC4227273
1 changed files with 5 additions and 2 deletions
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7
lib/src/query.c
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@ -2597,8 +2597,11 @@ static TSQueryError ts_query__parse_pattern(
repeat_step.alternative_is_immediate = true;
array_push(&self->steps, repeat_step);
// Stop when `step->alternative_index` is `NONE` or it points to
// `repeat_step` or beyond. Note that having just been pushed,
// `repeat_step` occupies slot `self->steps.size - 1`.
QueryStep *step = &self->steps.contents[starting_step_index];
while (step->alternative_index != NONE) {
while (step->alternative_index != NONE && step->alternative_index < self->steps.size - 1) {
step = &self->steps.contents[step->alternative_index];
}
step->alternative_index = self->steps.size;
@ -2612,7 +2615,7 @@ static TSQueryError ts_query__parse_pattern(
stream_skip_whitespace(stream);
QueryStep *step = &self->steps.contents[starting_step_index];
while (step->alternative_index != NONE) {
while (step->alternative_index != NONE && step->alternative_index < self->steps.size) {
step = &self->steps.contents[step->alternative_index];
}
step->alternative_index = self->steps.size;