Question

I am sure this would have been asked before but couldn’t find it. Is there any built in (i.e. either using std::wstring’s methods or the algorithms) way to case insensitive comparison the two wstring objects?

Answer 1

If you don’t mind being tied to Microsoft implementation you can use this function defined in <string.h>

int _wcsnicmp(
   const wchar_t *string1,
   const wchar_t *string2,
   size_t count 
);

But if you want best performance/compatibility/functionality ratio you will probably have to look at boost library (part of it is stl anyway). Simple example (taken from different answer to different question):

#include <boost/algorithm/string.hpp>

std::wstring wstr1 = L"hello, world!";
std::wstring wstr2 = L"HELLO, WORLD!";

if (boost::iequals(wstr1, wstr2))
{
    // Strings are identical
}