Re: [Request] A way to extract all instance of X from a range

[Meta via Digitalmars-d]

On Monday, 14 March 2016 at 23:34:37 UTC, Stefan Koch wrote:
On Monday, 14 March 2016 at 08:04:18 UTC, deadalnix wrote:
Right now, I'm repeating the following pattern many times :
range.map!(x => cast(Foo) x).filter!(x => x !is null)

Which is kind of annoying. Could we get something in phobos to 
do this ?

There you go ;)

alias castRange(T) =  map!(x => cast(T) x).filter!(x => x !is 
null);

I believe this should work with the latest DMD:

alias castRange(T) = t => t.map!(x => cast(T) x).filter!(x => x 
!is null);