Duplicate type declarations with npm link #6496
Description
Using TypeScript 1.7.3.
Suppose I have the below npm packages.
The declaration files are generated by TypeScript compiler, and referred to from the other packages by means of the way described here.
package-a
ts src:
export default class ClassA {
private foo: string;
bar: number;
}ts declaration:
declare class ClassA {
private foo;
bar: number;
}
export default ClassA;package-b (depends on package-a):
ts src:
import ClassA from 'package-a';
namespace ClassAFactory {
export function create(): ClassA {
return new ClassA();
}
}
export default ClassAFactory;ts declaration:
import ClassA from 'package-a';
declare namespace ClassAFactory {
function create(): ClassA;
}
export default ClassAFactory;package-c (depends on package-a and package-b):
ts src:
import ClassA from 'package-a';
import ClassAFactory from 'package-b';
let classA: ClassA;
classA = ClassAFactory.create(); // error!!The last line causes an error during compilation:
error TS2322: Type 'ClassA' is not assignable to type 'ClassA'.
Types have separate declarations of a private property 'foo'.
When I remove the line private foo; from the declaration of package-a, TypeScript does not emit any error.
However this workaround is a bit painful.
I understand that exposing private properties to declaration is by design (#1532).
I think TypeScript should ignore private properties when compiling variable assignment.
Or is there any better workaround for this?