traxys/tree-sitter
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Remove auxiliary rules from syntax tree

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This commit is contained in:
Max Brunsfeld 2014-01-28 22:09:37 -08:00
parent c3b65d22bf
commit 7d297f2f9e
15 changed files with 1107 additions and 724 deletions
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12
src/compiler/build_tables/perform.cpp
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@ -60,13 +60,21 @@ namespace tree_sitter {
}
}
}
static vector<bool> reduce_flags(const vector<rules::Symbol> &child_symbols) {
vector<bool> result;
for (auto symbol : child_symbols) {
result.push_back(symbol.is_auxiliary);
}
return result;
}
void add_reduce_actions(const ParseItemSet &item_set, size_t state_index) {
for (ParseItem item : item_set) {
if (item.is_done()) {
ParseAction action = (item.lhs.name == START) ?
ParseAction::Accept() :
ParseAction::Reduce(item.lhs, item.consumed_sym_count);
ParseAction::Reduce(item.lhs, reduce_flags(item.consumed_symbols));
parse_table.add_action(state_index, item.lookahead_sym, action);
}
}
@ -116,7 +124,7 @@ namespace tree_sitter {
lex_grammar(lex_grammar) {};
pair<ParseTable, LexTable> build() {
auto item = ParseItem(START, rules::sym(grammar.start_rule_name), 0, END_OF_INPUT);
auto item = ParseItem(START, rules::sym(grammar.start_rule_name), {}, END_OF_INPUT);
ParseItemSet item_set = item_set_closure(ParseItemSet({ item }), grammar);
add_parse_state(item_set);
return pair<ParseTable, LexTable>(parse_table, lex_table);