ToString for arbitrary types

tostring.cpp

#include <iostream>
#include <cstring>

#define TO_STRING_FOR_CLASS(X)\
template<class T>\
const char* ToString();\
\
template<>\
const char* ToString<X>() {\
    static const char* str = #X;\
    static std::size_t len = strlen(str);\
    if (len > 4) {\
        if (strncmp(str, "enum", 4) == 0) {\
            str += 4 + 1;\
        }\
        if (len > 5) {\
            if (strncmp(str, "class", 5) == 0 || strncmp(str, "union", 5) == 0) {\
                str += 5 + 1;\
            }\
            else if (strncmp(str, "struct", 6) == 0) {\
                str += 6 + 1;\
            }\
        }\
    }\
    return str;\
}

TO_STRING_FOR_CLASS(class Apple);
TO_STRING_FOR_CLASS(struct Bubbles);
TO_STRING_FOR_CLASS(union School);

template<class T>
void f() {
    std::cout << "You passed in the type: " << ToString<T>() << '\n';
}

int main() {
    f<Apple>();
    f<Bubbles>();
    f<School>();
}