JSDoc missing syntax for `new Map<string, string>()`

TypeScript Version: 3.7.x-dev.201xxxxx

Search Terms: JSDoc Map generics assignment any unsafe

Code

class MyServer {
  constructor () {
    // new Map is Map<any, any>; cannot call Map constructor with new Map<string, string[]>
    /** @type {Map<string, string[]>} */
    this.functions = new Map()
  }
}

const myServer = new MyServer()
myServer.functions.get('foo')

Expected behavior:

Expected to be able to say what the Map contains when creating a new map. In typescript you can do new Map<string, string[]>() but theres no explicit generic parameter function invocation syntax for JSDoc

Actual behavior:

The type Map<any, any> exists. This fails the eslint rule of no-unsafe-assignment and this fails the no-any rule of tslint etc.

Note that doing something similar for arrays works because there's a special case inference for [] and it also works for Set because the constructor is defined differently and it has generic inference in the initialization statement.

Playground Link: https://www.typescriptlang.org/play?useJavaScript=true#code/MYGwhgzhAECyCeBlApgJwG5ugbwFDWmAHsA7CAF1QFdhyjVoAKASh3wOgHoAqb6AAXLwADshywwwgDwVUASxIBzADTRZCxQG0AugD4AvtG6d2BcgAs5EAHQAzKiVpzSMALzQSyAO5xJLdvq4gbjEZOTQALZIaJgM7p4+CCgYaP5RybF2Dk4u1orI5IwA5LZEREXMuCHgUHDRKQx4BKGyNHQMLGwcXLwCQqI4AIKoqGDwMpQaBkYm3RZWWY7kzmTQ7joBQVUt4ekxWPHedRmplXsNizlkeQXFpeXMQA

Related Issues: Yes, in eslint https://github.com/typescript-eslint/typescript-eslint/issues/2109

Reproduisez l’exemple JavaScript dans le TypeScript Playground lié et comparez le résultat actuel de Map<any, any> avec l’affectation typée attendue. Examinez comment les types JSDoc représentent les appels de constructeurs génériques, en utilisant comme contexte l’issue associée de typescript-eslint. Le travail est considéré comme terminé lorsqu’une syntaxe prise en charge est définie et que l’exemple n’infère plus un type any non sûr.