Is there a TryParse equivalent in C++ (gcc)?

Question

Is there a equivalent of TryParse in C++(gcc) ?

I would like to parse a string which may contain (+31321) and store it as long. I know phone numbers are stored as st

Answer 1

+31321 can be parsed as a long with the usual stream extraction operators.

#include 
#include 
int main()
{
    std::istringstream s("+31321");
    long n;
    s >> n;
    std::cout << n << '\n';
}

demo: http://ideone.com/4rmlp

Although parsing an actual phone number (with parentheses, dashes, extensions, etc) may not be as simple.