36 lines
1.4 KiB
TypeScript
36 lines
1.4 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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import {TNode} from './interfaces/node';
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/** Called when directives inject each other (creating a circular dependency) */
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export function throwCyclicDependencyError(token: any): never {
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throw new Error(`Cannot instantiate cyclic dependency! ${token}`);
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}
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/** Called when there are multiple component selectors that match a given node */
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export function throwMultipleComponentError(tNode: TNode): never {
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throw new Error(`Multiple components match node with tagname ${tNode.tagName}`);
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}
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/** Throws an ExpressionChangedAfterChecked error if checkNoChanges mode is on. */
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export function throwErrorIfNoChangesMode(
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creationMode: boolean, checkNoChangesMode: boolean, oldValue: any, currValue: any): never|void {
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if (checkNoChangesMode) {
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let msg =
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`ExpressionChangedAfterItHasBeenCheckedError: Expression has changed after it was checked. Previous value: '${oldValue}'. Current value: '${currValue}'.`;
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if (creationMode) {
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msg +=
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` It seems like the view has been created after its parent and its children have been dirty checked.` +
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` Has it been created in a change detection hook ?`;
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}
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// TODO: include debug context
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throw new Error(msg);
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}
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}
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