public static FuncValue TryParse(ref Source s)
{
const string funcName = "function";
FuncValue res = null;
if (!s.SkipIf(funcName))
{
s.Rollback();
return(null);
}
res = new FuncValue();
if (!ArgumentsFormal.TryParse(ref s, res))
{
s.Rollback();
return(null);
}
Source tempSource = s.Clone();
res.body = StatementSequence.TryParse(ref tempSource);
s.currentPos = tempSource.currentPos;
s.Save();
return(res);
}
public static bool TryParse(ref Source s, FuncValue fv)
{
Spaces.Skip(ref s);
if (!s.SkipIf("("))
{
return(false);
}
while (true)
{
string ident = Identifier.Parse(ref s);
if (ident == "")
{
break;
}
fv.arguments.Add(ident);
if (!s.SkipIf(","))
{
break;
}
}
Spaces.Skip(ref s);
if (!s.SkipIf(")"))
{
return(false);
}
return(true);
}
private void InitPrint()
{
FuncValue print = new FuncValue();
print.body = new StatementSequence();
var temp = this;
print.body.AddStatement(new PrintStatement(ref temp));
var printVar = context.FindFirstVar("print");
printVar.Value = print;
}
public static Value TryParse(ref Source s)
{
Value res = null;
Null tempNull = Null.TryParse(ref s);
if (tempNull != null)
{
res = tempNull;
}
Number tempNum = Number.TryParse(ref s);
if (tempNum != null)
{
res = tempNum;
}
Bool tempBool = Bool.TryParse(ref s);
if (tempBool != null)
{
res = tempBool;
}
FuncValue tempFunc = FuncValue.TryParse(ref s);
if (tempFunc != null)
{
res = tempFunc;
}
Variable tempVar = Variable.TryParse(ref s);
if (tempVar != null)
{
res = tempVar;
}
if (res != null)
{
res.argsList = ArgumentsFact.TryParse(ref s);
//if (res.args != null && res.nodeType != ExprNodeType.Function)
// return null;
}
return(res);
}