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On Thursday, 11 June 2015 at 19:31:52 UTC, Walter Bright wrote:
> On 6/11/2015 8:03 AM, Dicebot wrote:
>> On the other hand they have one important advantage: all type 
>> arguments must
>> comply to one or more trairs and thus bodies of generics are 
>> checked before
>> institation. You are only allowed to call methods and 
>> operations of generic
>> arguments that are defined in relevan trait. This is huge win 
>> for code hygiene
>> compared to D.
>
> On the other hand, generic bodies in D can inquire if various 
> additional traits are available, and then adapt:
>
>   struct S(R) if (isInputRange!R)
>   {
>     ...
>     static if (isForwardRange!R)
>     {
>          R save()
>          {
> 	     auto result = this;
> 	     result.r = r.save;
> 	     return result;
>          }
>     }
>     ...
>   }
>
> This kind of thing is used extensively in Phobos generics.

It's not *quite* the same. I believe Rust traits are closer to 
C++ concepts.