toUpper()

[papa@arbolone.ca]

I would like to write a function to capitalize letters, say...
std::wstring toUpper(const std::wstring wstr){
for ( auto it = wstr.begin(); it != wstr.end(); ++it){
        global_wapstr.append(std::towupper(&it));

}
}

This doesn’t work, but doesn’t the standard already have something like 
std::wstring::toUpper(...)?

Thanks in advance 


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