dmd 2.063 beta 5

[TommiT]

On Thursday, 23 May 2013 at 13:01:25 UTC, Don wrote:
> I don't think it's legal in C++:
>
> struct S
> {
>   const int x = 5;
> };
>
> w.cpp:4:17: error: ISO C++ forbids initialization of member ‘x’ 
> [-fpermissive]

That is legal C++11 code. The non-static data member initializer 
(=5) simply adds an implicit entry (if not present) for that 
particular data member to each constructor initialization list. 
Thus, the struct S above is the same as:

struct S
{
     const int x;

     S() : x (5) { }
};

The fact that the field is const doesn't play any significant 
role here.