concepts and interfaces

[Don Clugston]

James Dennett wrote:
> Craig Black wrote:
>> This may sound a little retarded, but wouldn't making concepts obligatory 
>> make generic programming more complex and hence more difficult?  In my 
>> opinion this may do more harm than good.  A huge appeal of generic stuff in 
>> D is that it's easier to work with than the C++ stuff.  More powerful, yes, 
>> but also easier.  IMO this is very important.
> 
> Concepts appear to make generic programming simpler and
> hence easier, with more meaningful diagnostics.

But I think Craig's point is valid (and interesting) -- concepts will 
have a huge benefit for complicated C++ template code, but since D 
templates are easier to work with already (and we have static 
if/is/static assert), in D, concepts are at a totally different point on 
the cost-benefit curve. Are they still worthwhile?