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https://github.com/angular/angular
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7dd0db6d4f
This commit adds the `AstHost` interface, along with implementations for both Babel and TS. It also implements the Babel vesion of the `AstFactory` interface, along with a linker specific implementation of the `ImportGenerator` interface. These classes will be used by the new "ng-linker" to transform prelinked library code using a Babel plugin. PR Close #38866
18 lines
593 B
TypeScript
18 lines
593 B
TypeScript
/**
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* @license
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* Copyright Google LLC 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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import {FatalLinkerError} from '../fatal_linker_error';
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/**
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* Assert that the given `node` is of the type guarded by the `predicate` function.
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*/
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export function assert<T, K extends T>(
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node: T, predicate: (node: T) => node is K, expected: string): asserts node is K {
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if (!predicate(node)) {
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throw new FatalLinkerError(node, `Unsupported syntax, expected ${expected}.`);
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}
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}
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