adapt the duck - round 3

[Sebastian Graf]

I was grinding through the forum for something like Kenji Hara's 
adaptTo interfaces / structuralCast [1][2], purely at compile 
time for structs in my specific case.
Those entries are all about 3 years old and I'm wondering why it 
hasn't made it into Phobos yet. Was it only that we could not 
find an appropriate name for it?


[1] 
http://forum.dlang.org/thread/mailman.286.1285099532.858.digitalmars-d@puremagic.com
[2] 
http://forum.dlang.org/thread/i9ae2n$k9g$1@digitalmars.com?page=1