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Only allow one stack link with a given type containing errors

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This commit is contained in:
Max Brunsfeld 2017-09-13 10:05:31 -07:00
parent 07fb3ab0e6
commit 71595ffde6
1 changed files with 11 additions and 9 deletions
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20
src/runtime/stack.c
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@ -149,15 +149,17 @@ static StackNode *stack_node_new(StackNode *previous_node, Tree *tree, bool is_p
}
static bool stack__tree_is_equivalent(const Tree *left, const Tree *right) {
return left == right || (
left &&
right &&
left->child_count == 0 && right->child_count == 0 &&
left->symbol == right->symbol &&
left->padding.bytes == right->padding.bytes &&
left->size.bytes == right->size.bytes &&
left->extra == right->extra &&
ts_tree_external_token_state_eq(left, right));
return
left == right ||
(left &&
right &&
left->symbol == right->symbol &&
((left->error_cost > 0 && right->error_cost > 0) ||
(left->child_count == 0 && right->child_count == 0 &&
left->padding.bytes == right->padding.bytes &&
left->size.bytes == right->size.bytes &&
left->extra == right->extra &&
ts_tree_external_token_state_eq(left, right))));
}
static void stack_node_add_link(StackNode *self, StackLink link) {