private void ParseBinaryOp()
{
Token token = this.PeekToken();
this.CheckStartableToken(token);
BinaryOp expr = BinaryOp.CreateOp(this._current.token);
this._tree.AddOperator(expr);
}
public Tree Parse(string text)
{
this._scanner = new Scanner(text);
this._tree = new Tree();
Token token = this.NextToken();
if (token != Token.EndOfFile)
{
this.CheckStartableToken(token);
while (token != Token.EndOfFile)
{
MemberOp expression;
if (IsConstTocken(token))
{
this.ParseConst();
goto Label_022A;
}
if (this._tree._isStart && ((token == Token.Subtract) || (token == Token.Add)))
{
Constant expr = new Constant(0);
this._tree.AddOperand(expr);
BinaryOp op = BinaryOp.CreateOp(token);
this._tree.AddOperator(op);
goto Label_022A;
}
if (IsBinaryOp(token))
{
this.ParseBinaryOp();
goto Label_022A;
}
if (IsUnaryOp(token))
{
this.ParseUnaryOp();
goto Label_022A;
}
switch (token)
{
case Token.LeftIndexer:
this.ParseIndexer();
goto Label_022A;
case Token.RightIndexer:
this._tree.Pop('[');
goto Label_022A;
case Token.ConditionalIf:
this.ParseConditional();
goto Label_022A;
case Token.ConditionalSemicolon:
this.ParseConditionalSemicolon();
goto Label_022A;
case Token.Member:
this.ParseMember();
goto Label_022A;
case Token.LeftParen:
if (this._tree._top.Expression is MemberOp)
{
expression = (MemberOp)this._tree._top.Expression;
if (expression.IsFunction)
{
throw new ParserException("()()not allowed");
}
break;
}
goto Label_01E3;
case Token.RightParen:
this._tree.Pop('(');
goto Label_022A;
case Token.Comma:
this._tree.Pop(',');
this._tree.Push(',');
goto Label_022A;
case Token.Identifier:
this.ParseIdentifier();
goto Label_022A;
default:
throw this.BuildException(Error.InternalError);
}
expression.IsFunction = true;
Label_01E3:
this._tree.Push('(');
Label_022A:
token = this.NextToken();
}
this._tree.Complete();
}
return(this._tree);
}