private Nodes.ParseTreeNode ParseParenExpression(IEnumerator<Token> tokenStream)
{
if (tokenStream.Current.TokenType == TokenType.LeftParenthesis)
{
var parenNode = new Nodes.ParenthesisNode();
parenNode.LeftParenthesis = tokenStream.Current;
tokenStream.MoveNext();
parenNode.Contained = ParseBinaryExpression(tokenStream, 0);
if (tokenStream.Current.TokenType != TokenType.RightParenthesis)
{
throw ThrowHelper(tokenStream);
}
parenNode.RightParenthesis = tokenStream.Current;
tokenStream.MoveNext();
return parenNode;
}
else
{
return this.ParseVariable(tokenStream);
}
}
public override ConstraintViolation VisitParenthesisNode(ParenthesisNode parenNode)
{
return null;
}
public abstract ConstraintViolation VisitParenthesisNode(ParenthesisNode parenNode);