Toby <tjdonald...@gmail.com> writes:
> It seems that string's find_last_not_of method isn't returning
> string::npos:
>
> void test() {
> string s = " ";
> int i = s.find_last_not_of(' ');
> cout << "i = " << i << endl // prints -1
> << "string::npos = " << string::npos
> << endl;
> }
>
> On g++ (Ubuntu 4.3.2-1ubuntu12) 4.3. I get this output:
>
> i = -1
> string::npos = 4294967295
>
> Is this a bug? Or am I mis-reading the documentation?
Neither.
std::string::npos is of type std::string::size_type (which is an
unsigned type). Assigning this value to a signed type that isn't
sufficiently wide to hold it is asking for trouble.
What do you get from
void test()
{
string s = " ";
cout << "s.find_last_not_of(' ') = " << s.find_last_not_of(' ') << endl
<< "string::npos = " << string::npos << endl;
}
?
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