I'm trying to build an introspection system for a project I have.
I already have a working template to get members value
=== working members getter ===
Variant GETTER(T, string member)(Object target)
{
   T tt = cast(T)target;
   if (!tt)
       throw new ReflectionException("target is null or not " ~T.stringof ~" value: " ~target.toString());
   return Variant(__traits(getMember, tt, member));
}
===========================

Now I'm trying to implement a working setter. I have a problem for testing and converts the value.
Ideally I'd like something like the code below
===== not compiling setter ====
void SETTER(T, string member)(Object target, Variant value)
{
   T tt = cast(T)target;
   if (!tt)
       throw new ReflectionException("target is null or not " ~T.stringof ~" value: " ~target.toString());

   if(!value.convertsTo!( typeid(__traits(getMember, T, member))) )
       throw new ReflectionException("Can't convert " ~value.stringof ~" to " ~typeid(__traits(getMember, T, member)).toString());
   __traits(getMember, tt, member) = value.coerce( typeid(__traits(getMember, T, member)) );
}
==========================

it doesn't compile because I don't know how to get the type, at compile time, of member "member" of type "T"
how do I do that please? 

work with typeinfo!! :)

=====
void SETTER(T, string member)(Object target, Variant value)
{
   T tt = cast(T)target;
   if (!tt)
       throw new ReflectionException("target is null or not " ~T.stringof ~" value: " ~target.toString());

   if(!value.convertsTo!( typeof(__traits(getMember, T, member)) ))
       throw new ReflectionException("Can't convert " ~value.stringof ~" to " ~typeof(__traits(getMember, T, member)).stringof);
   __traits(getMember, tt, member) = value.coerce!( typeof(__traits(getMember, T, member)) );
}
======

works with typeinfo!

void SETTER(T, string member)(Object target, Variant value)
{
   T tt = cast(T)target;
   if (!tt)
       throw new ReflectionException("target is null or not " ~T.stringof ~" value: " ~target.toString());

   if(!value.convertsTo!( typeof(__traits(getMember, T, member)) ))
       throw new ReflectionException("Can't convert " ~value.stringof ~" to " ~typeof(__traits(getMember, T, member)).stringof);
   __traits(getMember, tt, member) = value.coerce!( typeof(__traits(getMember, T, member)) );
}




"Lloyd Dupont"  wrote in message news:itcthc$1onk$1@digitalmars.com...

I'm trying to build an introspection system for a project I have.
I already have a working template to get members value
=== working members getter ===
Variant GETTER(T, string member)(Object target)
{
   T tt = cast(T)target;
   if (!tt)
       throw new ReflectionException("target is null or not " ~T.stringof
~" value: " ~target.toString());
   return Variant(__traits(getMember, tt, member));
}
===========================

Now I'm trying to implement a working setter. I have a problem for testing
and converts the value.
Ideally I'd like something like the code below
===== not compiling setter ====
void SETTER(T, string member)(Object target, Variant value)
{
   T tt = cast(T)target;
   if (!tt)
       throw new ReflectionException("target is null or not " ~T.stringof
~" value: " ~target.toString());

   if(!value.convertsTo!( typeid(__traits(getMember, T, member))) )
       throw new ReflectionException("Can't convert " ~value.stringof ~" to
" ~typeid(__traits(getMember, T, member)).toString());
   __traits(getMember, tt, member) = value.coerce(
typeid(__traits(getMember, T, member)) );
}
==========================

it doesn't compile because I don't know how to get the type, at compile
time, of member "member" of type "T"
how do I do that please?