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digitalmars.D.learn - TypeInfo manipulation

reply "Zhenya" <zheny list.ru> writes:
Hi!
Tell me please,are any TypeInfo/typeid/classinfo manipulations 
possible?
For example I need a struct that overload typeid, or something 
like that?

Some time ago I tried to write some smart pointer that overlad 
classinfo property  in accordance with the real type of hold 
object,but I failed to do this becouse of
not having possibility to declar static and non-static version of 
the one function.Maybe there are better ways to do this?
Oct 25 2012
next sibling parent "Zhenya" <zheny list.ru> writes:
On Thursday, 25 October 2012 at 15:05:05 UTC, Zhenya wrote:

 Hi!
 Tell me please,are any TypeInfo/typeid/classinfo manipulations 
 possible?
 For example I need a struct that overload typeid, or something 
 like that?

 Some time ago I tried to write some smart pointer that overlad 
 classinfo property  in accordance with the real type of hold 
 object,but I failed to do this becouse of
 not having possibility to declar static and non-static version 
 of the one function.Maybe there are better ways to do this?



Or maybe there are a possibility to parametrize class by TypeInfo?
Oct 26 2012
prev sibling next sibling parent "Zhenya" <zheny list.ru> writes:
On Friday, 26 October 2012 at 19:57:14 UTC, Zhenya wrote:

 On Thursday, 25 October 2012 at 15:05:05 UTC, Zhenya wrote:

 Hi!
 Tell me please,are any TypeInfo/typeid/classinfo manipulations 
 possible?
 For example I need a struct that overload typeid, or something 
 like that?

 Some time ago I tried to write some smart pointer that overlad 
 classinfo property  in accordance with the real type of hold 
 object,but I failed to do this becouse of
 not having possibility to declar static and non-static version 
 of the one function.Maybe there are better ways to do this?



 Or maybe there are a possibility to parametrize class by 
 TypeInfo?



Is my question is so meaningless, that no one even say why? :(
Oct 27 2012
prev sibling next sibling parent "Maxim Fomin" <maxim maxim-fomin.ru> writes:
On Thursday, 25 October 2012 at 15:05:05 UTC, Zhenya wrote:

 Hi!
 Tell me please,are any TypeInfo/typeid/classinfo manipulations 
 possible?
 For example I need a struct that overload typeid, or something 
 like that?



It is impossible to overload typeid typeinfo.


 Some time ago I tried to write some smart pointer that overlad 
 classinfo property  in accordance with the real type of hold 
 object,but I failed to do this becouse of
 not having possibility to declar static and non-static version 
 of the one function.Maybe there are better ways to do this?



I can barely understand what exactly you were doing. If you post 
some code example it will probably help to find solution.
Oct 27 2012
prev sibling next sibling parent "Maxim Fomin" <maxim maxim-fomin.ru> writes:
On Friday, 26 October 2012 at 19:57:14 UTC, Zhenya wrote:

 On Thursday, 25 October 2012 at 15:05:05 UTC, Zhenya wrote:

 Hi!
 Tell me please,are any TypeInfo/typeid/classinfo manipulations 
 possible?
 For example I need a struct that overload typeid, or something 
 like that?

 Some time ago I tried to write some smart pointer that overlad 
 classinfo property  in accordance with the real type of hold 
 object,but I failed to do this becouse of
 not having possibility to declar static and non-static version 
 of the one function.Maybe there are better ways to do this?



 Or maybe there are a possibility to parametrize class by 
 TypeInfo?



What do you mean: "to parametrize class by Typeinfo"?

class A { }
A!TypeInfo var;

If you mean this, than how it can help?
Oct 27 2012
prev sibling next sibling parent "Zhenya" <zheny list.ru> writes:
 What do you mean: "to parametrize class by Typeinfo"?

 class A { }
 A!TypeInfo var;

 If you mean this, than how it can help?



It would be well if I could create object that inherits class 
with this typeinfo.
Oct 27 2012
prev sibling parent "Zhenya" <zheny list.ru> writes:
I have double dispatcher:

template Dispatcher(R)
{
	R execute(Left,Right)(R delegate(Left,Right) f,Object 
left,Object right)
	{
		return f(cast(Left)left,cast(Right)right);
	}
	struct Dispatcher
	{
		private R 
delegate(Object,Object)[Tuple!(TypeInfo_Class,TypeInfo_Class)] 
m_callbacks;
		void add(Left,Right)(R delegate(Left,Right) f)
		{
			m_callbacks[tuple(Left.classinfo,Right.classinfo)] = (Object 
l,Object r){return execute!(Left,Right)(f,l,r);};
		}
		void remove(Left,Right)()
		{
			m_callbacks.remove(tuple(Left.classinfo,Right.classinfo));
		}
		R opCall(Object l,Object r)
		{
			R delegate(Object,Object)* callback = 
tuple(l.classinfo,r.classinfo) in m_callbacks;
			return (*callback)(l,r);
		}
	}
}

And I have some class ierarhy:

class GameObject
{
}

class Foo : GameObject
{
}

class Bar : GameObject
{
}

problem is to create some wrapper to this classes

struct GameHandle(Type)

and this code work


void main()
{
	Dispatcher!void d;
	d.add!(GameHandle!Foo,GameHandle!Bar)((GameHandle!Foo,GameHandle!Bar){writeln("haha");});
	GameHandle!GameObject a;a.m_hold = new Foo;
	GameHandle!GameObject b;b.m_hold = new Bar;
	d(a,c);
	readln();
}
Oct 27 2012