Hello, is there a way of getting CT info of a class' children?

If no, what do you think of a new feature for DMD: template this static ctors/dtors:

class A
{
    static this(this T)()
    {
        writeln("static this(", T.stringof, ")");
    }
}

class B : A
{

}

would output:
static this(A)
static this(B)

how it works:
when instantiating (shared) static ctors/dtors of class C, DMD will look for template_this_static_ctors/dtors in C, and all of it's superclasses, instantiating each with C as this, and adding such instances to C as regular static ctors/dtors.

On 2014-04-22 11:20, Yuriy wrote:
> Hello, is there a way of getting CT info of a class' children?

Not in a pretty way but I think this should work:

* Implement a custom RTInfo in object.d in druntime. This template will be instantiated with all user defined types

* For each type that is a class, check all it's parents via __traits
* If a parent is matching what you're looking for then you found a child

-- 
/Jacob Carlborg

Any way to do it without patching druntime?

On 22/04/14 22:50, Yuriy wrote:
> Any way to do it without patching druntime?

Not that I know of.

-- 
/Jacob Carlborg

"Yuriy"  wrote in message news:duumbptvbqwknucxgaxi@forum.dlang.org... 

> Any way to do it without patching druntime?

Patch the compiler.

On Wed, 23 Apr 2014 02:34:52 -0400, Daniel Murphy <yebbliesnospam@gmail.com> wrote:

> "Yuriy"  wrote in message news:duumbptvbqwknucxgaxi@forum.dlang.org...
>> Any way to do it without patching druntime?
>
> Patch the compiler.

Did you type that with a straight face?

-Steve

"Steven Schveighoffer"  wrote in message news:op.xerz7jcceav7ka@stevens-macbook-pro-2.local...

> Did you type that with a straight face?

:) 

Ok, i've added a pull request to be discussed. It expands RTInfo capability as Jacob suggested. What do you think?

https://github.com/D-Programming-Language/druntime/pull/775

On Wednesday, 23 April 2014 at 16:06:58 UTC, Yuriy wrote:
> Ok, i've added a pull request to be discussed. It expands RTInfo capability as Jacob suggested. What do you think?
>
> https://github.com/D-Programming-Language/druntime/pull/775

Looks fairly interesting, because it partly solves the issue to allow custom rtinfo.

On 24/04/14 00:29, Martin Nowak wrote:

> Looks fairly interesting, because it partly solves the issue to allow
> custom rtinfo.

I don't like this solution for custom RTInfo. It requires you to change your type. I would rather modify the compiler to do something like this:

* Add a UDA to druntime: "core.attributes.rtInfo"

* If any template has the core.attributes.rtInfo UDA attached to itself, instantiate that as is done with core.RTInfo

-- 
/Jacob Carlborg