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Don't count less-far-along versions in better_version_exists method

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This commit is contained in:
Max Brunsfeld 2017-12-29 16:10:43 -08:00
parent d3c85f288d
commit 21a88b1731
1 changed files with 4 additions and 1 deletions
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5
src/runtime/parser.c
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@ -177,6 +177,7 @@ static bool parser__better_version_exists(Parser *self, StackVersion version,
bool is_in_error, unsigned cost) {
if (self->finished_tree && self->finished_tree->error_cost <= cost) return true;
Length position = ts_stack_top_position(self->stack, version);
ErrorStatus status = {
.cost = cost,
.is_in_error = is_in_error,
@ -185,7 +186,9 @@ static bool parser__better_version_exists(Parser *self, StackVersion version,
};
for (StackVersion i = 0, n = ts_stack_version_count(self->stack); i < n; i++) {
if (i == version || ts_stack_is_halted(self->stack, i)) continue;
if (i == version ||
ts_stack_is_halted(self->stack, i) ||
ts_stack_top_position(self->stack, i).bytes < position.bytes) continue;
ErrorStatus status_i = {
.cost = ts_stack_error_cost(self->stack, i),
.is_in_error = ts_stack_top_state(self->stack, i) == ERROR_STATE,