does `const auto` have any meaning?

Question

I think the question is clear enough. Will the auto keyword auto-detect const-ness, or always return a non-const type, even if there are eg. two versions of a f

Answer 1

const auto x = expr;

differs from

auto x = expr;

as

const X x = expr;

differs from

X x = expr;

So use const auto and const auto& a lot, just like you would if you didn't have auto.

Overload resolution is not affected by return type: const or no const on the lvalue x does not affect what functions are called in expr.