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Treat tokens that are sometimes extra as fragile

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This commit is contained in:
Max Brunsfeld 2015-12-16 20:04:45 -08:00
parent d0e107eb84
commit 66144dc28e
11 changed files with 418 additions and 403 deletions
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4
src/runtime/parser.c
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@ -210,6 +210,8 @@ static TSTree *ts_parser__select_tree(void *data, TSTree *left, TSTree *right) {
static bool ts_parser__shift(TSParser *self, int head,
TSStateId parse_state, TSTree *lookahead) {
if (self->language->symbol_metadata[lookahead->symbol].extra)
ts_tree_set_fragile(lookahead);
if (ts_stack_push(self->stack, head, parse_state, lookahead)) {
LOG("merge head:%d", head);
vector_erase(&self->lookahead_states, head);
@ -222,7 +224,7 @@ static bool ts_parser__shift(TSParser *self, int head,
static bool ts_parser__shift_extra(TSParser *self, int head, TSStateId state,
TSTree *lookahead) {
TSSymbolMetadata metadata = self->language->symbol_metadata[lookahead->symbol];
if (!metadata.extra && ts_stack_head_count(self->stack) > 1)
if (metadata.structural && ts_stack_head_count(self->stack) > 1)
lookahead = ts_tree_make_copy(lookahead);
ts_tree_set_extra(lookahead);
return ts_parser__shift(self, head, state, lookahead);