istringstream extraction

[Jim Parsons <parsons at clearway dot com>]

Hello,
  We have detected what we think may be an anomoly in the 
way integers are extracted from the istringstream class. Below please
find short sample code and the results. It seems as if the stream
pointer doesn't advance after attempting to extract an integer value.

  When we check with the .good operation, the result shows a bad
extraction. Also, when we replace .get with .getline delimited on '(',
and using is >> c has the same effect.

  Any thoughts on this problem would be very greatly appreciated. Is
this correct operation? Can we help pin this down/fix this if necessary?
  
-Jim Parsons


#include <iostream>
#include <string>
#include <sstream>
void main(void)
{

	unsigned int h4, h3, h2;
	char c;
	string s("Parse numbers (205,199,144)");
	istringstream is(s);

	do {
		c = is.get();
		cout <<"c is "<<c<<endl; 
	} while ( (c != EOF) && (c != '('));

	if(c == EOF)
	  cout << "Couldn't find parens" << endl;

	is >> h4;
	is >> c;
	if(c != ',')
	{
	  cout << "Couldn't find comma!" << endl;
	  cout << "h4 is " << h4 << endl;
	  cout << "c is " << c << endl;
	}
	else
	  cout << "All well" << endl;
}




c is P
c is a
c is r
c is s
c is e
c is  
c is n
c is u
c is m
c is b
c is e
c is r
c is s
c is  
c is (
Couldn't find comma!
h4 is 205199144
c is )



------------------------------------------------------------------