class B;
class A {
A(B b_) : b{b_} {}
B &b;
};
In C++, it is possible to have a reference member variable like 'b' in class A.
Can the same be achieved in TypeScript?
Alternatively, is there a specific method to accomplish this in TypeScript?
In JavaScript, unlike C or C++, there is no direct reference mechanism. Values are passed by value and objects are passed by reference. However, you cannot directly modify the underlying reference like in C or C++:
// This does not work in JavaScript
let x = 27;
let y = &x;
*y = 28;
assert(x === 28);
One way to achieve similar functionality in JavaScript is shown below:
class B {
public foo: string;
}
class A {
public constructor(public b: B) {}
}
const b = new B();
b.foo = 'bar';
const a = new A(b);
b.foo = 'foobar';
assert(a.b.foo === 'foobar');
It's important to note that in this scenario, the reference is copied, not the entire object as in C++.
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