istringstream.get me something!!

In the main function a call for this function get_token() and within it i use a global var/input ist.get..

Ist is previously declared outside the main like this : istringstream ist(temp_string);

temp_string is a c++ string

Code:

---

Token_value get_token()
{
      char ch = 0;
      do        // skip whitespace except '\n'
      {
          if(!ist.get(ch)) return curr_tok = END;
      }while(ch != '\n' && isspace(ch));
      switch (ch)
      {
          case 0 : //...etc

---

My problem is that ist.get(ch) WONT get anything?
when ist was declared within get_token it would work but now it just dont?

I dont get it..
any comment/sugestion/answers appreciated..

here is the full code just in case..

You shouldn't be initalising the stringstream outside of a function if you are using another variable to inialise it. Try making it a stringstream, and using the << operator to put the value of temp_string into it.

I tried that xsquared but it didnt work..
I really dont know why if I put cin.get it will work but ist.get just wont do it...

:confused:

I think its probably a problem with the way you initalize the stringstream.

hmm ok how then?
I tried to init it inside get_token() just like u said but same problem..

If u compile it do you have the same problem?
Im asking to be sure that the problem is not my compiler..

This is driving me nuts.. stuck at the same point for a very long time..
:rolleyes: