- Introduce `InjectionToken<T>` which is a parameterized and type-safe
  version of `OpaqueToken`.
DEPRECATION:
- `OpaqueToken` is now deprecated, use `InjectionToken<T>` instead.
- `Injector.get(token: any, notFoundValue?: any): any` is now deprecated
  use the same method which is now overloaded as
  `Injector.get<T>(token: Type<T>|InjectionToken<T>, notFoundValue?: T): T;`.
Migration
- Replace `OpaqueToken` with `InjectionToken<?>` and parameterize it.
- Migrate your code to only use `Type<?>` or `InjectionToken<?>` as
  injection tokens. Using other tokens will not be supported in the
  future.
BREAKING CHANGE:
- Because `injector.get()` is now parameterize it is possible that code
  which used to work no longer type checks. Example would be if one
  injects `Foo` but configures it as `{provide: Foo, useClass: MockFoo}`.
  The injection instance will be that of `MockFoo` but the type will be
  `Foo` instead of `any` as in the past. This means that it was possible
  to call a method on `MockFoo` in the past which now will fail type
  check. See this example:
```
class Foo {}
class MockFoo extends Foo {
  setupMock();
}
var PROVIDERS = [
  {provide: Foo, useClass: MockFoo}
];
...
function myTest(injector: Injector) {
  var foo = injector.get(Foo);
  // This line used to work since `foo` used to be `any` before this
  // change, it will now be `Foo`, and `Foo` does not have `setUpMock()`.
  // The fix is to downcast: `injector.get(Foo) as MockFoo`.
  foo.setUpMock();
}
```
PR Close #13785
		
	
			
		
			
				
	
	
		
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			TypeScript
		
	
	
	
	
	
			
		
		
	
	
			35 lines
		
	
	
		
			1.7 KiB
		
	
	
	
		
			TypeScript
		
	
	
	
	
	
| /**
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|  * @license
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|  * Copyright Google Inc. All Rights Reserved.
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|  *
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|  * Use of this source code is governed by an MIT-style license that can be
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|  * found in the LICENSE file at https://angular.io/license
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|  */
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| 
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| // Must be imported first, because angular2 decorators throws on load.
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| import 'reflect-metadata';
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| 
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| export {InjectionToken, Injector, Provider, ReflectiveInjector} from '@angular/core';
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| export {Options} from './src/common_options';
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| export {MeasureValues} from './src/measure_values';
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| export {Metric} from './src/metric';
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| export {MultiMetric} from './src/metric/multi_metric';
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| export {PerflogMetric} from './src/metric/perflog_metric';
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| export {UserMetric} from './src/metric/user_metric';
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| export {Reporter} from './src/reporter';
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| export {ConsoleReporter} from './src/reporter/console_reporter';
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| export {JsonFileReporter} from './src/reporter/json_file_reporter';
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| export {MultiReporter} from './src/reporter/multi_reporter';
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| export {Runner} from './src/runner';
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| export {SampleDescription} from './src/sample_description';
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| export {SampleState, Sampler} from './src/sampler';
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| export {Validator} from './src/validator';
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| export {RegressionSlopeValidator} from './src/validator/regression_slope_validator';
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| export {SizeValidator} from './src/validator/size_validator';
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| export {WebDriverAdapter} from './src/web_driver_adapter';
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| export {PerfLogEvent, PerfLogFeatures, WebDriverExtension} from './src/web_driver_extension';
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| export {ChromeDriverExtension} from './src/webdriver/chrome_driver_extension';
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| export {FirefoxDriverExtension} from './src/webdriver/firefox_driver_extension';
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| export {IOsDriverExtension} from './src/webdriver/ios_driver_extension';
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| export {SeleniumWebDriverAdapter} from './src/webdriver/selenium_webdriver_adapter';
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