Injecting deps via token from same file into a scoped Injectable fails

[jelbourn]

Overview

1. You have an InjectionToken defined in some file
2. You have an @Injectable in that same file that injects a dep via that token

Easiest workaround is to move the token to another file.

Reproduction

1. Clone https://github.com/jelbourn/material2/commits/cdk-tree-shakable-services
2. npm i
3. gulp test

Generated code (snippet)

exports.LIVE_ANNOUNCER_ELEMENT_TOKEN = new core_1.InjectionToken('liveAnnouncerElement', {
    scope: core_1.APP_ROOT_SCOPE,
    factory: function () { return null; },
});

...

LiveAnnouncer.ngInjectableDef = i0.defineInjectable({ factory: function LiveAnnouncer_Factory() { return new LiveAnnouncer(i0.inject(LIVE_ANNOUNCER_ELEMENT_TOKEN, null, 0), i0.inject(i1.DOCUMENT)); }, token: LiveAnnouncer, scope: i0.APP_ROOT_SCOPE });

Error

Because LIVE_ANNOUNCER_ELEMENT_TOKEN isn't referenced off of exports, the second part of the code is just trying to reference a nonexistent identifier.

a11y/live-announcer/live-announcer.spec.ts(4,24): error TS2305: Module '"/Users/jelbourn/material2/src/cdk/a11y/live-announcer/live-announcer"' has no exported member 'LIVE_ANNOUNCER_ELEMENT_TOKEN'.

[jelbourn]

This is probably obsolete

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