Restrict passed parameter to a string literal

Question

I have a class to wrap string literals and calculate the size at compile time.

The constructor looks like this:

template< std::size_t N >
Liter         


        

Answer 1

Yes. You can generate compile time error with following preprocessor:

#define IS_STRING_LITERAL(X) "" X ""

If you try to pass anything other than a string literal, the compilation will fail. Usage:

Literal greet(IS_STRING_LITERAL("Hello World!"));  // ok
Literal greet(IS_STRING_LITERAL(broke)); // error