Case insensitive std::string.find()

Question

I am using std::string\'s find() method to test if a string is a substring of another. Now I need case insensitive version of the same thing. For s

Answer 1

#include 
using namespace std;

template 
struct ichar {
    operator charT() const { return toupper(x); }
    charT x;
};
template 
static basic_string > *istring(basic_string &s) { return (basic_string > *)&s; }
template 
static ichar *istring(const charT *s) { return (ichar *)s; }

int main()
{
    string s = "The STRING";
    wstring ws = L"The WSTRING";
    cout << istring(s)->find(istring("str")) << " " << istring(ws)->find(istring(L"wstr"))  << endl;
}

A little bit dirty, but short & fast.