private GenericExpressionNode ExprPrime(string expression, GenericExpressionNode lhs)
{
if (Same(expression, Token.TokenType.EndOfInput))
{
return(lhs);
}
else if (Same(expression, Token.TokenType.Or))
{
OperatorExpressionNode orNode = new OrExpressionNode();
GenericExpressionNode rhs = BooleanTerm(expression);
orNode.LeftChild = lhs;
orNode.RightChild = rhs;
return(ExprPrime(expression, orNode));
}
else
{
// I think this is ok. ExprPrime always shows up at
// the rightmost side of the grammar rhs, the EndOfInput case
// takes care of things
return(lhs);
}
}
private GenericExpressionNode ExprPrime(string expression, GenericExpressionNode lhs)
{
if (Same(expression, Token.TokenType.EndOfInput))
{
return lhs;
}
else if (Same(expression, Token.TokenType.Or))
{
OperatorExpressionNode orNode = new OrExpressionNode();
GenericExpressionNode rhs = BooleanTerm(expression);
orNode.LeftChild = lhs;
orNode.RightChild = rhs;
return ExprPrime(expression, orNode);
}
else
{
// I think this is ok. ExprPrime always shows up at
// the rightmost side of the grammar rhs, the EndOfInput case
// takes care of things
return lhs;
}
}