public INode Parse(IExtendedEnumerator <Token> input)
{
INode node;
if (!input.HasNext())
{
return(null);
}
this.it = new Lookahead2Enumerator <Token>(input);
try
{
node = this.ParseSubExpression();
}
catch (Colosoft.Text.Jep.ParseException exception)
{
if (this.it.PeekNext() != null)
{
exception.SetPosition(this.it.PeekNext().GetLineNumber(), this.it.PeekNext().GetColumnNumber());
}
throw exception;
}
if (this.it.PeekNext() != null)
{
string str = this.it.PeekNext().ToString();
if (this.it.PeekNextnext() != null)
{
str = str + ", " + this.it.PeekNextnext();
}
Colosoft.Text.Jep.ParseException exception2 = new Colosoft.Text.Jep.ParseException("Tokens still remaining after parse completed", this.it.PeekNext().GetLineNumber(), this.it.PeekNext().GetColumnNumber());
throw exception2;
}
if (this.nodes.Count != 0)
{
throw new Colosoft.Text.Jep.ParseException("Only one node should be of stack after parsing, it has " + this.nodes.Count);
}
return(node);
}