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Avoid deep tree comparison when both trees have errors

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This commit is contained in:
Max Brunsfeld 2017-07-05 17:33:35 -07:00
parent c53f9bcbd9
commit 8f028ebf68
3 changed files with 5 additions and 2 deletions
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2
src/runtime/parser.c
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@ -452,6 +452,8 @@ static bool parser__select_tree(Parser *self, Tree *left, Tree *right) {
return false;
}
if (left->error_cost > 0) return -1;
int comparison = ts_tree_compare(left, right);
switch (comparison) {
case -1:

2
test/fixtures/error_corpus/javascript_errors.txt vendored
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@ -53,8 +53,8 @@ if ({a: 'b'} {c: 'd'}) {
(program
(if_statement
(ERROR (object (pair (identifier) (string))))
(object (pair (identifier) (string)))
(ERROR (statement_block (labeled_statement (identifier) (expression_statement (string)))))
(statement_block
(expression_statement (assignment
(identifier)

3
test/runtime/parser_test.cc
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@ -398,7 +398,8 @@ describe("Parser", [&]() {
assert_root_node(
"(program "
"(expression_statement (number) (ERROR (number))) "
"(ERROR (number)) "
"(expression_statement (number)) "
"(expression_statement (math_op (number) (number))))");
});
});