What are (were) the most difficult parts of D?

[Basile B.]

On Thursday, 12 May 2022 at 12:13:32 UTC, Basile B. wrote:
> On Thursday, 12 May 2022 at 11:50:59 UTC, Alain De Vos wrote:
>> Some keywords are overloaded and have different meaning when 
>> used in a different place.
>> Also some syntactic-sugar is way to much meaning too many 
>> different ways to do the same thing. I would prefer one way 
>> which is advised.
>
> `ptr1 is ptr2` VS `is(T==U)` is ok even if the keyword is 
> reused for two different things.
>
> Problem is more (from 
> https://dlang.org/spec/expression.html#is_expression)
>
> ```
> is ( Type : TypeSpecialization , TemplateParameterList )
> is ( Type == TypeSpecialization , TemplateParameterList )
> is ( Type Identifier : TypeSpecialization , 
> TemplateParameterList )
> is ( Type Identifier == TypeSpecialization , 
> TemplateParameterList )
> ```
>
> I never remember those variants, because basically you never 
> need them...
> They were required for std.traits and that's it.

Perfect example of reuse that is never a problem : `final`.

what statically does `is` should have been several `__traits` I 
think.