Hi, I'm unfortunately in D this construction is not possible to
define:
class A(T){
abstract void method(S)(T arg1,S arg2);
}
As adding S to function declaration makes it not virtual.
But we can add this kind of functionality using mixin templates
mixin template BaseMix(T,S){
abstract void method(T arg1,S arg2);
}
class Base{
mixin BaseMix!(int,int);
}
//we can create now implementation by creation of other mixin
mixin template ImplMix(T,S){
override void method(T arg1,S arg2){
import std.stdio;
writeln(T.strinof," ",S.stringof);
//some dummy implementation
}
}
//and initiate the class
class Impl:Base{
mixin ImplMix!(int,int);
}
OK but i don't want to write each argument to mixin templates
invocations
like:
mixin ImplMix!(int,int);
mixin ImplMix!(int,byte);
mixin ImplMix!(int,string);
mixin ImplMix!(int,Object);
mixin ImplMix!(int,ubyte); etc.
It may produce a bug susceptible code as i would have to write it
in two class definitions.
I created template that automatically calls mixins with PList...
passed but i can't call it with mixins having more than one
template param like ImplMix(T,S)
template MixinTypeIterate(alias mixinTemplate,TList...){
static if(TList.length>0){
mixin mixinTemplate!(TList[0]);
static if(TList.length>1){
mixin MixinTypeIterate!(mixinTemplate,TList[1..$]);
}
}
}
how to alias mixin template to be able to pass it to this one ?
class BaseClass(T){
protected alias Types=AliasSeq!(int,string,ubyte);
private alias WrappedMix(S)=mixin Mix!(T,S); //not compiles -
mixins are no t regular templates
mixin MixinTypeIterate!(WrappedImplMix,Types);
}
class ImplClass(T){
private alias WrappedMix(T)=mixin ImplMix!(T,S); //not
compiles - mixins are no t regular templates
mixin MixinTypeIterate!(WrappedImplMix,Types);
}
How to make it work?
