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query: Fix last child operator with multiple children

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Fixes #806
This commit is contained in:
Max Brunsfeld 2021-03-09 13:40:15 -08:00
parent 24785cdb39
commit 9dc88061d5
2 changed files with 46 additions and 2 deletions
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9
lib/src/query.c
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@ -1690,7 +1690,7 @@ static TSQueryError ts_query__parse_pattern(
// Parse the child patterns
bool child_is_immediate = false;
uint16_t child_start_step_index = self->steps.size;
uint16_t last_child_step_index = 0;
for (;;) {
if (stream->next == '.') {
child_is_immediate = true;
@ -1698,6 +1698,7 @@ static TSQueryError ts_query__parse_pattern(
stream_skip_whitespace(stream);
}
uint16_t step_index = self->steps.size;
TSQueryError e = ts_query__parse_pattern(
self,
stream,
@ -1706,7 +1707,10 @@ static TSQueryError ts_query__parse_pattern(
);
if (e == PARENT_DONE && stream->next == ')') {
if (child_is_immediate) {
self->steps.contents[child_start_step_index].is_last_child = true;
if (last_child_step_index == 0) {
return TSQueryErrorSyntax;
}
self->steps.contents[last_child_step_index].is_last_child = true;
}
stream_advance(stream);
break;
@ -1714,6 +1718,7 @@ static TSQueryError ts_query__parse_pattern(
return e;
}
last_child_step_index = step_index;
child_is_immediate = false;
}
}