private Expression CompileBinaryExpression(int baseLevel, int lambdaLevel)
{
Expression current = CompileUnaryExpression(lambdaLevel);
PushPosition();
while (!End)
{
BinaryOperator op = ExpressionSnippets.GetBinaryOperator(GetPunctuation());
if (op == BinaryOperator.None)
{
break;
}
if (ExpressionSnippets.GetOperatorLevel(op) <= baseLevel)
{
break;
}
else
{
Move();
int fromPos = PeekPos();
int toPos = Pos;
current = new BinaryExpression(op, current, CompileBinaryExpression(ExpressionSnippets.GetOperatorLevel(op), lambdaLevel), fromPos, toPos);
}
}
PopPosition();
return(current);
}
public override Expression Reduce(Expression root, ExpressionReductor reductor)
{
if (root is BinaryExpression)
{
Expression left = reductor.Reduce((root as BinaryExpression).Left);
Expression right = reductor.Reduce((root as BinaryExpression).Right);
if (left is BinaryExpression && ExpressionSnippets.GetOperatorLevel((left as BinaryExpression).Operator) == ExpressionSnippets.GetOperatorLevel((root as BinaryExpression).Operator))
{
Expression ll = reductor.Reduce((left as BinaryExpression).Left);
Expression lr = reductor.Reduce((left as BinaryExpression).Right);
if (lr.IsConstantExpression())
{
return(BinaryExpression.Create((left as BinaryExpression).Operator, ll, BinaryExpression.Create((root as BinaryExpression).Operator, lr, right)));
}
}
}
return(root);
}