Are ={} and {}-style initializations the same in C++11?

Question

C++11 introduced {}-style initializations. But are these two forms

T x {...};
T x = {...};

the same?

Answer 1

The syntax when using them in one case means different things

struct A { };

namespace X {
  struct A final {};
  struct A final = {};
}

In the first case, we are defining a struct called A, and in the second case we are defining an object called final.