Typescript @deprecated annotation

deprecated.ts

class Dog {
    @deprecated('Dogs don\'t roar, they talk.')
    roar() {
        console.log('RRRRR');
    }

    @deprecated()
    smile() {
        console.log('smile');
    }

    walk() {
        console.log('walk');
    }
}

function deprecated(message: string = 'Function {name} is deprecated.') {
    return (instance, name, descriptor) => {
        var original = descriptor.value;
        var localMessage = message.replace('{name}', name);

        descriptor.value = function() {
            console.warn(localMessage);

            return original.apply(instance, arguments);
        };

        return descriptor;
    };
}

// create my dog
var d = new Dog();

d.roar();
d.smile();
d.walk();

Does not work with Promise.

This works great with functions, but it does not work with classes.

Another issue, the line 25 uses instance which will cause this issue. Change it to this will be OK:

export default function deprecated(message: string = 'Function {name} is deprecated.') {
  return (instance: any, name: string, descriptor: any) => {
    console.log('ins for ', name, ' = ', instance);
    let original = descriptor.value;
    let localMessage = message.replace('{name}', name);

    descriptor.value = function() {
      console.warn(localMessage);

      // Use `this` instead of `instance`:
      return original.apply(this, arguments);
    };

    return descriptor;
  };
}