#ifdef-choose between the C++11 and the C++14 versions

[eyalroz]

In the motivating blog post, you present both a C++14 and a C++11 version of some of the code (e.g. construction of an array string from two string literals) - but I don't see #ifdefs for that in the code. Would you mind adding those in, to make this a C++11/C++14 utility?

[akrzemi1]

I will consider doing it. Note that the library in the current shape also works with C++14.

[maggu2810]

Hello,
I would like to ask you, if you still consider to do it?

Second, I mentioned that deducing the size of a string_literal from initializer is impossible in C++11. The situation will be different in C++17. I can define a deduction guide:

It would be really great if there could be some ifdef or branches that show how things could be simplified using C++14, C++17 or C++20 features. I agree the C++11 version could be used for all future versions, too. But it would be great for me and other to get a deeper insight (also in the new C++ feature that "simplifies" coding).