protected void Reduce(int ruleId)
{
LogBeforeReduction(ruleId);
int rhsLength = _ruleRhsLengths[ruleId];
//
// Default action "$$ = $1" for unit productions.
// Default action "@$ = @1.Merge(@N)" for location info.
//
if (rhsLength == 1)
{
yyval = _valueStack.Peek(1); // default action: $$ = $1;
yyloc = _locationStack.Peek(1);
}
else
{
yyval = new TValue();
if (rhsLength == 0)
{
// The location span for an empty production will start with the
// beginning of the next lexeme, and end with the finish of the
// previous lexeme. This gives the correct behaviour when this
// nonsense value is used in later Merge operations.
yyloc = MergeLocations(_lastTokenSpan, TokenSpan);
}
else
{
TLocation at1 = GetLocation(rhsLength);
TLocation atN = GetLocation(1);
if (at1 != null && atN != null)
{
yyloc = MergeLocations(at1, atN);
}
}
}
DoAction(ruleId);
_stateStack.Pop(rhsLength);
_valueStack.Pop(rhsLength);
_locationStack.Pop(rhsLength);
_currentState = _stateStack.Peek(1);
int gotoState;
if (_currentState.GotoStates.TryGetValue(_ruleLhsNonTerminals[ruleId], out gotoState))
{
LogBeforeGoto(gotoState, ruleId);
_currentState = _states[gotoState];
}
_stateStack.Push(_currentState);
_valueStack.Push(yyval);
_locationStack.Push(yyloc);
}
private void Reduce(int ruleId)
{
int ruleDef = _rules[ruleId];
int rhsLength = GetRuleRhsLength(ruleDef);
LogBeforeReduction(ruleId, rhsLength);
if (rhsLength == 0)
{
// The location span for an empty production will start with the
// beginning of the next lexeme, and end with the finish of the
// previous lexeme. This gives the correct behaviour when this
// nonsense value is used in later Merge operations.
yyloc = MergeLocations(_lastTokenSpan, GetTokenSpan());
}
else if (rhsLength == 1)
{
yyloc = _stack.PeekLocation(1);
}
else
{
TLocation at1 = GetLocation(rhsLength);
TLocation atN = GetLocation(1);
yyloc = MergeLocations(at1, atN);
}
DoAction(ruleId);
_stack.Pop(rhsLength);
var currentState = _stack.PeekState(1);
int gotoState;
if (currentState.GotoStates.TryGetValue(GetRuleLhsNonterminal(ruleDef), out gotoState))
{
LogBeforeGoto(gotoState, ruleId);
currentState = _states[gotoState];
}
_stack.Push(currentState, yyval, yyloc);
_currentState = currentState;
}