public INode Match(Lookahead2Enumerator <Token> it, IGrammarParser parser)
{
Token token = it.PeekNext();
if (token == null)
{
return(null);
}
if (!token.IsFunction())
{
return(null);
}
string source = token.GetSource();
IPostfixMathCommand pfmc = ((FunctionToken)token).GetPfmc();
if (!this.open.Equals(it.PeekNextnext()))
{
return(null);
}
it.Consume();
it.Consume();
if (this.close.Equals(it.PeekNext()))
{
if (!pfmc.CheckNumberOfParameters(0))
{
throw new Colosoft.Text.Jep.ParseException("Function " + pfmc + " invalid number of arguments 0");
}
it.Consume();
return(this.nf.BuildFunctionNode(source, pfmc, new INode[0]));
}
List <INode> list = new List <INode>();
while (true)
{
INode item = parser.ParseSubExpression();
list.Add(item);
if (this.close.Equals(it.PeekNext()))
{
it.Consume();
if (!pfmc.CheckNumberOfParameters(list.Count))
{
throw new Colosoft.Text.Jep.ParseException(string.Concat(new object[] {
"Function ",
pfmc,
" invalid number of arguments ",
list.Count
}));
}
return(this.nf.BuildFunctionNode(source, pfmc, list.ToArray()));
}
if (!this.comma.Equals(it.PeekNext()))
{
break;
}
it.Consume();
}
throw new Colosoft.Text.Jep.ParseException("Closing bracket not found. Next token is " + it.PeekNext());
}
public ASTFunNode BuildFunctionNode(string name, IPostfixMathCommand pfmc, INode[] arguments)
{
if (!pfmc.CheckNumberOfParameters(arguments.Length))
{
throw new Colosoft.Text.Jep.ParseException(string.Concat(new object[] {
"Incorrect number of parameters ",
arguments.Length,
" for ",
name,
" "
}));
}
ASTFunNode node = new ASTFunNode(JJTFUNNODE);
node.SetFunction(name, pfmc);
this.CopyChildren(node, arguments);
return(node);
}