mirek wrote on Tue, 16 June 2020 15:25

Novo wrote on Tue, 16 June 2020 21:22

Another implementation using initializer_list:

template <typename T>
constexpr T get_i(int i, std::initializer_list<T> list)
{
	return list[clamp(i, 0, list.size())];
}

This one is trictly-typed, although I couldn't check assembly with godbolt because it complains about something ...

Nah, we do not want strict typing here.

Sorry, last one won't compile.
The one using variadic template is fine, although it still needs specialization for const char* ... :-/

template <typename T>
constexpr T get_i2(int i, const std::initializer_list<T>& list)
{
	const int n = list.size();
	return *(list.begin() + clamp(i, 0, n));
}

const char* c = get_i2(1, {"zero", "one", "two"});

.L.str:
        .asciz  "one"

c:
        .quad   .L.str