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Discard tokens after error detection to find the best repair

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* Use GLR stack-splitting to try all numbers of tokens to
  discard until a repair is found.
* Check the validity of repairs by looking at the child trees,
  rather than the statically-computed 'in-progress symbols' list
This commit is contained in:
Max Brunsfeld 2016-05-09 14:31:44 -07:00
parent 9d247e45b2
commit 22c550c9d6
21 changed files with 454 additions and 506 deletions
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2
spec/runtime/stack_spec.cc
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@ -53,7 +53,7 @@ vector<StackEntry> get_stack_entries(Stack *stack, StackVersion version) {
ts_stack_iterate(
stack,
version,
[](void *payload, TSStateId state, size_t tree_count, bool is_done, bool is_pending) -> StackIterateAction {
[](void *payload, TSStateId state, TreeArray *trees, size_t tree_count, bool is_done, bool is_pending) -> StackIterateAction {
auto entries = static_cast<vector<StackEntry> *>(payload);
StackEntry entry = {state, tree_count};
if (find(entries->begin(), entries->end(), entry) == entries->end())