35 lines
1.3 KiB
TypeScript
35 lines
1.3 KiB
TypeScript
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/**
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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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* This file is used to control if the default rendering pipeline should be `ViewEngine` or `Ivy`.
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*
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* Reexport from:
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* - `./ivy_switch_false` => Use `ViewEngine`.
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* - `./ivy_switch_true` => Use `Ivy`.
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*
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* This file is here for your IDE as well as for `google3`. The `bazel` build system
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* specifically excludes this file and instead generates a new file which is controlled by
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* command line:
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*
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* - `bazel build packages/core` => Use `ViewEngine`
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* - `bazel build packages/core --define=ivy=true` => Use `Ivy`
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*
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* See: `bazel build packages/core:ivy_switch` for more details.
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*
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* ## How to use this
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*
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* Use this mechanism to have the same symbol be aliased to different implementation.
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* 1) Create two implementations of a symbol (most likely a `function` or a `class`).
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* 2) Export the two implementation under same name in `./ivy_switch_false` and `./ivy_switch_false`
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* respectively.
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* 3) Import the symbol from `./ivy_switch`. The imported symbol will that point to either the
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* symbol in `./ivy_switch_false` and `./ivy_switch_false` depending on the compilation mode.
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*/
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export * from './ivy_switch_false';
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