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58 lines
1.8 KiB
Plaintext
58 lines
1.8 KiB
Plaintext
/**
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* @author Toru Nagashima <https://github.com/mysticatea>
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* See LICENSE file in root directory for full license.
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*/
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"use strict"
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const { CALL, CONSTRUCT, READ } = require("@eslint-community/eslint-utils")
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const unprefixNodeColon = require("./unprefix-node-colon")
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/** @typedef {import('../unsupported-features/types.js').DeprecatedInfoTraceMap} DeprecatedInfoTraceMap */
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/** @typedef {import('../unsupported-features/types.js').SupportVersionTraceMap} SupportVersionTraceMap */
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/**
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* @template {SupportVersionTraceMap | DeprecatedInfoTraceMap} TraceMap
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* Enumerate property names of a given object recursively.
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* @param {TraceMap} traceMap The map for APIs to enumerate.
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* @param {string[]} [path] The path to the current map.
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* @param {{ [key: string]: WeakSet<TraceMap> }} [recursion] An object to block recursion (per module)
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* @returns {IterableIterator<string>} The property names of the map.
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*/
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function* enumeratePropertyNames(traceMap, path = [], recursion = {}) {
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const recursionSet =
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typeof path[0] === "string"
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? (recursion[path[0]] ??= new WeakSet())
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: undefined
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if (recursionSet?.has(traceMap)) {
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return
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}
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for (const key of Object.getOwnPropertyNames(traceMap)) {
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const childValue = traceMap[key]
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const childPath = [...path, key]
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const childName = unprefixNodeColon(childPath.join("."))
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if (childValue == null) {
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continue
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}
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if (childValue[CALL]) {
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yield `${childName}()`
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}
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if (childValue[CONSTRUCT]) {
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yield `new ${childName}()`
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}
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if (childValue[READ]) {
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yield childName
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}
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recursionSet?.add(traceMap)
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yield* enumeratePropertyNames(childValue, childPath, recursion)
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}
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}
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module.exports = enumeratePropertyNames
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