Labeled maps, set and records

Suggestion

Following on the idea of labeled tuples and parameter names, would it be possible to label Map, Set and Record?

Use Cases

It would help to communicate the intent of the different parts.

Examples

Map<tabId: number, annotationCount: number>
Record<tabId: number, annotationCount: number>
Set<tabId: number>

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.

先查看链接的 TypeScript 4.0 labeled tuple elements 发布说明以及此 issue 中的示例。该 payload 没有列出任何实现文件、入口点或测试，因此在编码之前，需要通过 TypeScript 的设计流程确定范围和完成标准。