private static bool TryTakeOperatorExp(TokenKeeper pos, out ExpressionNode node)
{
var work = new TokenKeeper(pos);
if (TryTakeTerm(work, out var left) &&
TryTakeOperator(work, out var op) &&
TryTakeSecondTerm(work, out var right))
{
node = new OperatorExpNode(left, op, right);
pos.Swap(work);
return(true);
}
node = null;
return(false);
}
private static ComputationNode ConvertOperator(OperatorExpNode opNode)
{
if (opNode.Right is OperatorExpNode rightOpExp)
{
var rightPrecedence = OperatorPrecedence[rightOpExp.Op.Text];
var leftPrecedence = OperatorPrecedence[opNode.Op.Text];
if (rightPrecedence > leftPrecedence)
{
var myLeft = opNode.Left;
var yourLeft = rightOpExp.Left;
var yourRight = rightOpExp.Right;
var newRight = new OperatorExpNode(myLeft, opNode.Op, yourLeft);
var newOpExp = new OperatorExpNode(yourRight, rightOpExp.Op, newRight);
var desc = newOpExp.Describe();
return(Convert(newOpExp));
}
}
return(new BinaryOperation(opNode.Op, Convert(opNode.Left), Convert(opNode.Right)));
}