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Reuse fragile parent nodes that were reduced in the current state

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This commit is contained in:
Max Brunsfeld 2015-12-22 13:59:04 -08:00
parent f9e6fce62d
commit 6b11890d68
3 changed files with 16 additions and 5 deletions
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13
src/runtime/parser.c
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@ -129,12 +129,14 @@ static bool ts_parser__can_reuse(TSParser *self, int head, TSTree *subtree) {
return false;
if (subtree->symbol == ts_builtin_sym_error)
return false;
if (ts_tree_is_fragile(subtree))
return false;
if (ts_tree_is_fragile(subtree)) {
if (subtree->context.parse_state != ts_stack_top_state(self->stack, head))
return false;
}
TSStateId state = ts_stack_top_state(self->stack, head);
if (subtree->context.lex_state != TSTREE_LEX_STATE_INDEPENDENT) {
if (subtree->context.lex_state != TSTREE_STATE_INDEPENDENT) {
TSStateId lex_state = self->language->lex_states[state];
if (subtree->context.lex_state != lex_state)
return false;
@ -335,6 +337,10 @@ static bool ts_parser__reduce(TSParser *self, int head, TSSymbol symbol,
*/
TSStateId state;
TSStateId top_state = ts_stack_top_state(self->stack, new_head);
if (parent->context.parse_state != TSTREE_STATE_ERROR)
parent->context.parse_state = top_state;
if (extra) {
ts_tree_set_extra(parent);
state = top_state;
@ -378,6 +384,7 @@ static bool ts_parser__reduce(TSParser *self, int head, TSSymbol symbol,
TSTree **parent = vector_get(&self->reduce_parents, i);
(*parent)->options.fragile_left = true;
(*parent)->options.fragile_right = true;
(*parent)->context.parse_state = TSTREE_STATE_ERROR;
}
}