Better errors for non-exported types

[DanielRosenwasser]

// @filename a.ts

declare function foo(): any

declare function bar(): any;

export { bar };

// @filename b.ts

import { foo, bar } from "./a";

Currently we provide the following error messages:

Module '"./a"' has no exported member 'foo'.
Module '"./a"' has no exported member 'bar'.

We could instead provide the errors:

Module '"./a"' declares 'foo' locally, but it is not exported.
Module '"./a"' declares 'bar' locally', but it is exported as 'baz'.

Also using the

'{0}' is declared here.

related span.

Later on, we could provide quick fixes to respectively

• Export foo from ./a.
• Correct the usage of bar to baz.

[a-tarasyuk]

@DanielRosenwasser Is there any way to check if a variable was declared in a module? I mean, in order to show message Module '"./a"' declares 'foo' locally, but it is not exported., need to check if it was declared in a module locally.

[DanielRosenwasser]

There should be a symbol table for sourceFile.locals if it's non-exported (as opposed to sourceFile.symbol.exports.

[DanielRosenwasser]

Thanks @a-tarasyuk!