rckrdmrd
97f407c661
- Prefijo v2: MCH - TRACEABILITY-MASTER.yml creado - Listo para integracion como submodulo Workspace: v2.0.0 | SIMCO: v4.0.0
37 lines
979 B
Plaintext
37 lines
979 B
Plaintext
/**
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* Copyright (c) Meta Platforms, Inc. and affiliates.
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*
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* This source code is licensed under the MIT license found in the
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* LICENSE file in the root directory of this source tree.
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*
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* @flow strict
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* @noformat
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*/
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'use strict';
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import type {ESNode} from 'hermes-estree';
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import type {VisitorKeys as VisitorKeysType} from '../generated/ESTreeVisitorKeys';
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import FlowVisitorKeys from '../generated/ESTreeVisitorKeys';
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export function isNode(thing: mixed) /*: implies thing is {+[string]: mixed} */ {
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return (
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typeof thing === 'object' && thing != null && typeof thing.type === 'string'
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);
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}
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export type {VisitorKeysType};
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export function getVisitorKeys<T: ESNode>(
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node: T,
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visitorKeys?: ?VisitorKeysType,
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): $ReadOnlyArray<$Keys<T>> {
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const keys = (visitorKeys ?? FlowVisitorKeys)[node.type];
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if (keys == null) {
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throw new Error(`No visitor keys found for node type "${node.type}".`);
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}
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// $FlowExpectedError[prop-missing]
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return keys;
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}
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