DIP proposal: Enum parameters

[Quirin Schroll]

On Friday, 23 September 2022 at 16:44:05 UTC, Quirin Schroll 
wrote:
> On Friday, 23 September 2022 at 16:17:01 UTC, ryuukk_ wrote:
>> ``enum`` is supposed to be an enumeration, not a _ for compile 
>> time usecase, in fact, ``comptime`` is a better name, so i 
>> personally would love if it was changed to that, if that's 
>> possible.
>
> It probably must be an existing keyword. `comptime` would be 
> possible as a contextual keyword, something Walter opposes. 
> `static` is the only other candidate. I’ve looked through the 
> whole [list of 
> keywords](https://dlang.org/spec/lex.html#keywords).

Nevermind. I just found out that [attributes for function 
parameters](https://dlang.org/spec/function.html#Parameters) are 
a thing as of late. As with `@safe`, `@nogc` and `@property`, 
`@comptime` could be another compiler-recognized attribute.

As a member function attribute, `@comptime` intuitively looks 
more like it means that the function can only be used for CTFE 
and never at run-time (cf. 
[`consteval`](https://en.cppreference.com/w/cpp/language/consteval) in C++; something like this was suggested for D before).