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Compress parse table by allowing reductions w/ unexpected lookaheads

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This commit is contained in:
Max Brunsfeld 2016-06-29 09:54:08 -07:00
parent 9c37c06ec7
commit 0e2bbbd7ee
7 changed files with 76 additions and 12 deletions
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10
src/compiler/build_tables/build_parse_table.cc
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@ -70,6 +70,11 @@ class ParseTableBuilder {
if (error.type != TSCompileErrorTypeNone)
return { parse_table, error };
for (const ParseState &state : parse_table.states)
for (const auto &pair1 : state.entries)
for (const auto &pair2 : state.entries)
parse_table.symbols[pair1.first].compatible_symbols.insert(pair2.first);
build_error_parse_state();
allow_any_conflict = true;
@ -134,8 +139,7 @@ class ParseTableBuilder {
const ParseItemSet &item_set = recovery_states[symbol];
if (!item_set.entries.empty()) {
ParseStateId state = add_parse_state(item_set);
error_state->entries[symbol].actions.push_back(
ParseAction::Recover(state));
error_state->entries[symbol].actions.push_back(ParseAction::Recover(state));
}
}
@ -268,7 +272,7 @@ class ParseTableBuilder {
}
void remove_duplicate_parse_states() {
remove_duplicate_states<ParseState, ParseAction>(&parse_table.states);
remove_duplicate_states<ParseTable, ParseAction>(&parse_table);
}
ParseAction *add_action(ParseStateId state_id, Symbol lookahead,