Maybe support for assign resolution in constructors

[reaperdtme]

Search Terms

assign

Suggestion

my constructors usually follow the pattern:

class It {
  prop1: string
  prop2: string
  constructor(props: It) {
    (_ || Object).assign(this, props);
  }
}

With this though, I get the error

property 'prop1' has no initializer and is definitely not assign in the constructor

Though it is.

Typing out all properties in constructor, constructor params and class vars is sadly redundant.

Typescript apparently has the inner workings for assignment awareness, can this be extended to assigning functions?

Use Cases

Above
I'm sure other people can find some dope use cases for an assign type descriptor.

Checklist

My suggestion meets these guidelines:

• This wouldn't be a breaking change in existing TypeScript/JavaScript code
• This wouldn't change the runtime behavior of existing JavaScript code
• This could be implemented without emitting different JS based on the types of the expressions
• This isn't a runtime feature (e.g. library functionality, non-ECMAScript syntax with JavaScript output, etc.)
• This feature would agree with the rest of TypeScript's Design Goals.

[DanielRosenwasser]

Duplicate of #26792

[typescript-bot]

This issue has been marked as a duplicate and has seen no activity in the last day. It has been closed automatic house-keeping purposes.