Question

I have a template, that takes a char argument like:

A<'T'>

I am storing my T in a variable like:

const char ch = str[0]; //str is a string from my program

constexpr char ch = str[0]; // this doesnt work either for me

I am trying to achieve this:

A<ch>();

I am using gcc 4.7 and have dabbled with constexpr but I havent been able to get that work

Any idea of a way to get this to work?
Any help is appreciated

Answer 1

This can only work if everything is a constant expression:

constexpr char str[] = "Hello World";
constexpr char ch = str[0];
A<ch> x;