Removing the qualified name restriction on import targets

[vlomshakov]

It seems to me, it's very inconvenient, that import declaration can't have none qualified symbol as target. By the reason I have to use next way to do this:

class S {}

export type SS = S;
export var SS = S;

Maybe, removing the qualified name restriction will be more convenient than combination of type alias and var alias.

[mhegazy]

Another use-case described in #3832

[RyanCavanaugh]

Approved.

There is some slight subtlety here -- consider the following code:

namespace X {
  interface window { }
  export import Y = window;
}
// What is the meaning of X.Y?

You can think of two different resolution algorithms that we could use on line 3:

• For each meaning of window (type, value, namespace), resolve that identifier under that meaning.
  • This would mean that Y had the type of the local interface and the value of the global name window
• Resolve window looking for any meaning. Use all meanings which that symbol points to.
  • This would mean that Y only has the type of the local interface

The second interpretation is more predictable and is more likely to be what's intended.

[jbcpollak]

This is labeled as easy, for someone who is a novice to TypeScript could some guidance on implementation be added to the issue so we could look into contributing a PR?

[abhinavramesh8]

I agree with @jbcpollak. Even I feel that there should be some amount of guidance.

[mhegazy]

I would start looking at getSymbolOfPartOfRightHandSideOfImportEquals. this function assumes that the target is a Namespace, and thus looks it as such. this will fail, and you would get an error like "can not find namespace 'foo'". I would unify this function to always resolve SymbolFlags.Value | SymbolFlags.Type | SymbolFlags.Namespace, write some tests, and see what else breaks..

[exx8]

Is this still a problem? as I was able to do this:
A.ts:

 class A {

}
export =A;

B.ts

import A = require("./A");
let a:A=new A();

on 3.6.3

[vijaya-lakshmi-venkatraman]

Hi,
Is this still available?