Using 'auto' type deduction - how to find out what type the compiler deduced?

Question

How can I find out what type the compiler deduced when using the auto keyword?

Example 1: Simpler

auto tickTime = 0.001;

W

Answer 1

@jonathan-oconnor points out that you can use the [[deprecated]] attribute introduced in C++14 to produce a very clean solution:

template
[[deprecated]] constexpr void printType(T const&) {}

Unfortunately though, the diagnostic emitted by MSVC doesn't mention the type. (example)