libstdc++/5133: Problems with toupper

[paolo@gcc.gnu.org]

Synopsis: Problems with toupper

Responsible-Changed-From-To: unassigned->paolo
Responsible-Changed-By: paolo
Responsible-Changed-When: Sun Dec 16 13:53:55 2001
Responsible-Changed-Why:
    Taking care of this.
State-Changed-From-To: open->feedback
State-Changed-By: paolo
State-Changed-When: Sun Dec 16 13:53:55 2001
State-Changed-Why:
    Hi Peter,
    
    in Josuttis, pp. 499 and 718 I find an explanation of what
    is happening with your testcase. In a nutshell, tolower and
    toupper are old C functions (you may use them through
    cctype) whereas std::toupper(c, loc) (and the corresponding
    tolower) are global functions of the C++ locales.
    Therefore, your testcase should be changed to:
    
    #include <string>
    #include <iostream> 
    #include <algorithm>
    #include <cctype>
    
    int main()
    {
        std::string s("Hallo");
        //std::transform (s.begin(), s.end(), s.begin(), std::tolower);
        //std::transform (s.begin(), s.end(), s.begin(), ::tolower);
        std::transform (s.begin(), s.end(), s.begin(), tolower);
        std::cout << "lowered: " << s << std::endl;
    }
    
    which indeed compiles and runs fine.
    
    Ok?
    
    Cheers,
    Paolo.
    
     

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