Suggestion: Add built-in vanilla constructor interface

Search Terms

1. built-in constructor interface

Suggestion

Consider the below from the official TS docs on decorators:

function classDecorator<T extends {new(...args:any[]):{}}>(constructor:T) {
    return class extends constructor {
        newProperty = "new property";
        hello = "override";
    }
}

vs:

function classDecorator<T extends Constructor>(constructor:T) {
    return class extends constructor {
        newProperty = "new property";
        hello = "override";
    }
}

I suggest we have a built-in Constructor interface so we can save typing.

Use Cases

See above.

Examples

See above.

Checklist

My suggestion meets these guidelines:

• [x ] This wouldn't be a breaking change in existing TypeScript/JavaScript code
• [x ] 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
• [ x] This isn't a runtime feature (e.g. library functionality, non-ECMAScript syntax with JavaScript output, etc.)
• [x ] This feature would agree with the rest of TypeScript's Design Goals.

まず、リンクされた TypeScript の decorator ドキュメントと、提案されている Constructor インターフェースの issue の例を読んでください。次に、組み込み型宣言のコンパイラーでの処理と関連するテストを見つけます。完了条件は、出力される JavaScript や既存のランタイム動作を変更せずに、提案どおりインターフェースを利用できることです。