Get static fields!

[Simen Kjærås]

On Saturday, 16 June 2018 at 05:05:19 UTC, DigitalDesigns wrote:
> tupleof does not return static fields as does not Fields. 
> Currently the only method seems to be use allMembers, but that 
> returns members requiring filtering, which there is no good 
> filtering checks. I'd simply like to get all the fields of a 
> type, static and non-static.

std.traits.hasStaticMember is your friend:

import std.meta : Filter, staticMap, Alias, ApplyLeft;
import std.traits : hasStaticMember;
alias FilterMembers(T, alias Fn) = Filter!(ApplyLeft!(Fn, T), 
__traits(allMembers, T));
alias StaticNamesTuple(T) = FilterMembers!(T, hasStaticMember);

And if you want them as aliases:

alias getMember(T, string name) = Alias!(__traits(getMember, T, 
name));
alias GetMembers(T, names...) = staticMap!(ApplyLeft!(getMember, 
T), names);
alias StaticMembersTuple(T) = GetMembers!(T, StaticNamesTuple!T);

--
   Simen