I have a preprocessor macro, called INSTR(…). It takes in a comma separated list of chars, and outputs a compile time constant number depending on the input. This macro currently works, and can be used like this:

enum Instructions
{
    INSTRUCTION_1 = INSTR('i','n','s','t','r','_','1'), //2408996205L when evaluated
    INSTRUCTION_2 = INSTR('i','n','s','t','r','_','2')  //2408996172L when evaluated
};

This currently works as intended, but obviously looks a bit clunky. I was wondering if it is possible to turn a word (not necessarily a string literal) in the preprocessor, turn it into a list of characters like that and insert it into the INSTR(…) function at compile time?

I’ve tried using string literals like mentioned here but it won’t work at compile time.