Can I mix compile time string comparison with MPL templates?
- by Negative Zero
I got this compile time string comparison from another thread using constexpr and C++11 (http://stackoverflow.com/questions/5721813/compile-time-assert-for-string-equality). It works with constant strings like "OK"
constexpr bool isequal(char const *one, char const *two) {
return (*one && *two) ? (*one == *two && isequal(one + 1, two + 1))
: (!*one && !*two);
}
I am trying to use it in the following context:
static_assert(isequal(boost::mpl::c_str<boost::mpl::string<'ak'>>::value, "ak"), "should not fail");
But it gives me an compilation error of static_assert expression is not an constant integral expression.
Can I do this?
