public static While TryParse(ref Source s)
{
const string WhileName = "while";
While res = null;
if (!s.SkipIf(WhileName))
{
s.Rollback();
return(null);
}
res = new While();
res.condition = Condition.TryParse(ref s);
if (res.condition == null)
{
s.Rollback();
return(null);
}
Source tempSource = s.Clone();
res.body = StatementSequence.TryParse(ref tempSource);
s.currentPos = tempSource.currentPos;
s.Save();
return(res);
}
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 void Parse(string str)
{
sourceCode = new Source(str);
statements = StatementSequence.TryParse(ref sourceCode);
}