Composing features at compile time

[Dicebot]

On Sunday, 24 November 2013 at 14:23:55 UTC, Philippe Sigaud 
wrote:
> But how do you use policies to inject different code in 
> different
> places of your struct?

Don't really get the question. Isn't it what policies do pretty 
much by definition? You decompose part of target functionality 
into smaller blocks with optional behavior (including no-op 
behavior) and provide specific ones as alias parameters. D has 
additional benefit of being able to use one as template mixin for 
cleaner syntax. But I am pretty sure you know this, so what is 
the question again? :)