MemberFunctionsTuple() from std.traits will return the list of names of member function, and FieldTypeTuple from std.traits will return the list of the _types_ of the member variables. But I don't see a function that returns the list of the _names_ of the member variables. Am I just blind, or does such a function not currently exist?

- Jonathan M Davis

Jonathan M Davis <jmdavisprog@gmail.com> wrote:

> MemberFunctionsTuple() from std.traits will return the list of names of member
> function, and FieldTypeTuple from std.traits will return the list of the _types_
> of the member variables. But I don't see a function that returns the list of the
> _names_ of the member variables. Am I just blind, or does such a function not
> currently exist?

__traits[1] is your friend in these matters.

__traits( allMembers, Foo ) returns a tuple of string literals, each of
which corresponds to a member of Foo.

[1] http://www.digitalmars.com/d/2.0/traits.html

-- 
Simen

Simen kjaeraas <simen.kjaras@gmail.com> wrote:

> Jonathan M Davis <jmdavisprog@gmail.com> wrote:
>
>> MemberFunctionsTuple() from std.traits will return the list of names of member
>> function, and FieldTypeTuple from std.traits will return the list of the _types_
>> of the member variables. But I don't see a function that returns the list of the
>> _names_ of the member variables. Am I just blind, or does such a function not
>> currently exist?
>
> __traits[1] is your friend in these matters.
>
> __traits( allMembers, Foo ) returns a tuple of string literals, each of
> which corresponds to a member of Foo.

If you prefer the temmplated way, here's a FieldNameTuple template:

template FieldNameTuple( T ) {
    enum FieldNameTuple = __traits( allMembers, T );
}

-- 
Simen

On Sun, Jul 4, 2010 at 12:55, Simen kjaeraas <simen.kjaras@gmail.com> wrote:

>
> __traits[1] is your friend in these matters.
>>
>> __traits( allMembers, Foo ) returns a tuple of string literals, each of which corresponds to a member of Foo.
>>
>
>
Somehting I discovered today: it works for module names, also:

auto ioMembers = __traits(allMembers, std.stdio);

It also contains the unittests... Hmm, I wonder what one can do with that.


Philippe