Smart structural generic type inference support

[pmunin]

TypeScript Version: 2.8.1

Problem: when there are too many generic parameters (e.g. nested generic interfaces), it gets hard to remember the order of those parameters. Some smart structural generic type inference needed.

Code

type ComplexGeneric1<TArg1, TArg2>={
    arg1:TArg1,
    arg2:TArg2,
}
type ComplexGeneric2<TArg1, TArg2>={
    arg1:TArg1,
    arg2:TArg2,
}

interface IMyInterface<TArg11=number,TArg12=number, TArg21=number, TArg22=number>
{
    myFunc(p1:ComplexGeneric1<TArg11, TArg12>, p2:ComplexGeneric2<TArg21, TArg22>);
}

var actualImplementation:IMyInterface<number,string,number, string>={
    myFunc(p1,p2)
    {
        //
    }
}

There should be a way to declare IMyInterface generic to be able to create implementation the following way:

var desiredImplementation:IMyInterface<{ 
        p1:{arg1:number, arg2:string},
        p2:{arg1:number, arg2:string}
    }>=
{
    myFunc(p1,p2)
    {
        //p1.arg1 = 123
        //p1.arg2 = "hello world"
    }
}

Is there a way to define IMyInterface to make it happen? Am I the only one who would like to have it?

I would expect something like this to work, but it doesn't:

interface IMyInterface<TStructure extends ({p1: {arg1:TArg11, arg2:TArg12},p2:{arg1:TArg21, arg2:TArg22}}), TArg11=number,TArg12=number, TArg21=number, TArg22=number>
{
    myFunc(p1:ComplexGeneric1<TArg11, TArg12>, p2:ComplexGeneric2<TArg21, TArg22>);
}

[AlCalzone]

Is this #23696 possibly what you want?

[mhegazy]

indeed a duplicate of #22631 and should be fixed by #23696

[typescript-bot]

Automatically closing this issue for housekeeping purposes. The issue labels indicate that it is unactionable at the moment or has already been addressed.