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Moves in the generated parser

This commit is contained in:
Robin Jadoul 2017-01-26 12:51:43 +01:00
parent 53f5093019
commit 3f524078c2
1 changed files with 7 additions and 2 deletions
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9
templates/c++/lr.h
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@ -40,6 +40,7 @@ class {{name}} {
*/
struct Token {
Token(const {{name}}_Symbol& sym, const Value& val) : symbol(sym), value(val) {}
Token(const {{name}}_Symbol& sym, Value&& val) : symbol(sym), value(std::move(val)) {}
{{name}}_Symbol symbol;
Value value;
};
@ -118,6 +119,9 @@ inline std::string to_string({{name}}_Symbol s) {
case {{name}}_Symbol::{{symbol}}:
return "{{symbol}}";
{{/symbols}}
default:
//should not happen
return "?";
}
}
@ -159,7 +163,8 @@ Value {{name}}<Value>::parse() {
if ((TABLE[top][i] & 0x3) != ERROR)
expected.emplace_back(static_cast<{{name}}_Symbol>(i));
}
Value errorVal = error(tok, expected);
Token report = Token{tok.symbol, std::move(tok.value)};
Value errorVal = error(report, expected);
while (!valueStack.empty() && (TABLE[stateStack.top()][verr] & 0x3) == ERROR) {
valueStack.pop();
@ -216,7 +221,7 @@ Value {{name}}<Value>::parse() {
case ACCEPT:
assert(stateStack.size() == 2);
assert(valueStack.size() == 1);
return valueStack.top().value;
return std::move(valueStack.top().value);
default:
//IMPOSSIBLE
break;