• Lloyd Dupont (79/79) Jun 14 2011 I'm writing some manual reflection (a bit more automatism will come late...

"Lloyd Dupont" <ld-REMOVE galador.net> writes:

I'm writing some manual reflection (a bit more automatism will come later, 
thanks to __traits and mixin)(hopefully)
There are a few problems with my implementation so far...

- First the implementation:

==== system.reflection.member.d =====
module system.reflection.member;

public:

public enum MemberType
{
    Bool,
    Int,
    Object = 100,
}

class MemberDesc
{
    MemberType mtype;
    string name;

    union
    {
        bool delegate() getbool;
        byte delegate() getyte;
        int delegate() getint;
        Object delegate() getobject;
    }

    this(string name, bool delegate() getbool)
    {
        this.name = name;
        this.mtype = MemberType.Bool;
        this.getbool = getbool;
    }

    this(string name, int delegate() getint)
    {
        this.name = name;
        this.mtype = MemberType.Int;
        this.getint = getint;
    }

    this(string name, Object delegate() getobject)
    {
        this.name = name;
        this.mtype = MemberType.Object;
        this.getobject = getobject;
    }
}
========= test.d =====
module test;

import system.reflection.property;

class Foo
{
    private int _abc;
     property public int ABC() { return _abc; }
     property public void ABC(int value) { _abc = value; }

    private Foo _foo;
     property public Foo FOO() { return _foo; }
     property public void FOO(Foo value) { _foo = value; }

    MemberDesc[string] getmembers;

    this()
    {
        getmembers["ABC"] = new MemberDesc("ABC", &ABC);
        getmembers["FOO"] = new MemberDesc("FOO", delegate Object() { return 
FOO(); });
    }

    override string toString()
    {
        return format("Foo(%s, %s)", ABC, FOO);
    }
}
====================

- now the problems:

1./ "getmembers" is an instance variable (i.e. not static) because.. it 
contains delegate!
ideally it should be static! how could I have this working with a static 
"getmembers"?

2./ the very different syntax for the constructor of MemberDesc for ABC and 
FOO
("&ABC", and "delegate Object() { return FOO(); }") how could I automate 
that (with mixin, __traits and foreach)

3./ I'd like the "getmembers" declaration and / or initialization being in a 
(mixin?) template. is that possible? how?

Thanks for any tip(S)! :)