gistfile1.txt

class AAA{
    constructor(){
        console.log("aaa")
    }
}

class BBB{
    constructor(){
        console.log("bbb")
    }
}

class Hoge<A , B>{
    constructor(public a : A , public b : B){
    }
}

class Fuga<B> extends Hoge<AAA , B>{
}

new Fuga<BBB>(new AAA() , new BBB());