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All rights reserved. Licensed under the MIT license.\n// See LICENSE in the project root for license information.\n\n/* eslint-disable @typescript-eslint/no-redeclare */\n\nimport type { ApiItem, IApiItemJson, IApiItemConstructor, IApiItemOptions } from '../items/ApiItem';\nimport type { Excerpt, IExcerptTokenRange } from './Excerpt';\nimport { TypeParameter } from '../model/TypeParameter';\nimport { InternalError } from '@rushstack/node-core-library';\nimport { ApiDeclaredItem } from '../items/ApiDeclaredItem';\nimport type { DeserializerContext } from '../model/DeserializerContext';\n\n/**\n * Represents parameter information that is part of {@link IApiTypeParameterListMixinOptions}\n * @public\n */\nexport interface IApiTypeParameterOptions {\n  typeParameterName: string;\n  constraintTokenRange: IExcerptTokenRange;\n  defaultTypeTokenRange: IExcerptTokenRange;\n}\n\n/**\n * Constructor options for {@link (ApiTypeParameterListMixin:interface)}.\n * @public\n */\nexport interface IApiTypeParameterListMixinOptions extends IApiItemOptions {\n  typeParameters: IApiTypeParameterOptions[];\n}\n\nexport interface IApiTypeParameterListMixinJson extends IApiItemJson {\n  typeParameters: IApiTypeParameterOptions[];\n}\n\nconst _typeParameters: unique symbol = Symbol('ApiTypeParameterListMixin._typeParameters');\n\n/**\n * The mixin base class for API items that can have type parameters.\n *\n * @remarks\n *\n * This is part of the {@link ApiModel} hierarchy of classes, which are serializable representations of\n * API declarations.  The non-abstract classes (e.g. `ApiClass`, `ApiEnum`, `ApiInterface`, etc.) use\n * TypeScript \"mixin\" functions (e.g. `ApiDeclaredItem`, `ApiItemContainerMixin`, etc.) to add various\n * features that cannot be represented as a normal inheritance chain (since TypeScript does not allow a child class\n * to extend more than one base class).  The \"mixin\" is a TypeScript merged declaration with three components:\n * the function that generates a subclass, an interface that describes the members of the subclass, and\n * a namespace containing static members of the class.\n *\n * @public\n */\n// eslint-disable-next-line @typescript-eslint/naming-convention\nexport interface ApiTypeParameterListMixin extends ApiItem {\n  /**\n   * The type parameters.\n   */\n  readonly typeParameters: ReadonlyArray<TypeParameter>;\n\n  serializeInto(jsonObject: Partial<IApiItemJson>): void;\n}\n\n/**\n * Mixin function for {@link (ApiTypeParameterListMixin:interface)}.\n *\n * @param baseClass - The base class to be extended\n * @returns A child class that extends baseClass, adding the {@link (ApiTypeParameterListMixin:interface)}\n * functionality.\n *\n * @public\n */\nexport function ApiTypeParameterListMixin<TBaseClass extends IApiItemConstructor>(\n  baseClass: TBaseClass\n  // eslint-disable-next-line @typescript-eslint/no-explicit-any\n): TBaseClass & (new (...args: any[]) => ApiTypeParameterListMixin) {\n  class MixedClass extends baseClass implements ApiTypeParameterListMixin {\n    public readonly [_typeParameters]: TypeParameter[];\n\n    // eslint-disable-next-line @typescript-eslint/no-explicit-any\n    public constructor(...args: any[]) {\n      super(...args);\n\n      const options: IApiTypeParameterListMixinOptions = args[0];\n\n      this[_typeParameters] = [];\n\n      if (this instanceof ApiDeclaredItem) {\n        if (options.typeParameters) {\n          for (const typeParameterOptions of options.typeParameters) {\n            const defaultTypeExcerpt: Excerpt = this.buildExcerpt(typeParameterOptions.defaultTypeTokenRange);\n            const typeParameter: TypeParameter = new TypeParameter({\n              name: typeParameterOptions.typeParameterName,\n              constraintExcerpt: this.buildExcerpt(typeParameterOptions.constraintTokenRange),\n              defaultTypeExcerpt,\n              isOptional: !defaultTypeExcerpt.isEmpty,\n              parent: this\n            });\n\n            this[_typeParameters].push(typeParameter);\n          }\n        }\n      } else {\n        throw new InternalError(\n          'ApiTypeParameterListMixin expects a base class that inherits from ApiDeclaredItem'\n        );\n      }\n    }\n\n    /** @override */\n    public static onDeserializeInto(\n      options: Partial<IApiTypeParameterListMixinOptions>,\n      context: DeserializerContext,\n      jsonObject: IApiTypeParameterListMixinJson\n    ): void {\n      baseClass.onDeserializeInto(options, context, jsonObject);\n\n      options.typeParameters = jsonObject.typeParameters || [];\n    }\n\n    public get typeParameters(): ReadonlyArray<TypeParameter> {\n      return this[_typeParameters];\n    }\n\n    /** @override */\n    public serializeInto(jsonObject: Partial<IApiTypeParameterListMixinJson>): void {\n      super.serializeInto(jsonObject);\n\n      const typeParameterObjects: IApiTypeParameterOptions[] = [];\n      for (const typeParameter of this.typeParameters) {\n        typeParameterObjects.push({\n          typeParameterName: typeParameter.name,\n          constraintTokenRange: typeParameter.constraintExcerpt.tokenRange,\n          defaultTypeTokenRange: typeParameter.defaultTypeExcerpt.tokenRange\n        });\n      }\n\n      if (typeParameterObjects.length > 0) {\n        jsonObject.typeParameters = typeParameterObjects;\n      }\n    }\n  }\n\n  return MixedClass;\n}\n\n/**\n * Static members for {@link (ApiTypeParameterListMixin:interface)}.\n * @public\n */\nexport namespace ApiTypeParameterListMixin {\n  /**\n   * A type guard that tests whether the specified `ApiItem` subclass extends the `ApiParameterListMixin` mixin.\n   *\n   * @remarks\n   *\n   * The JavaScript `instanceof` operator cannot be used to test for mixin inheritance, because each invocation of\n   * the mixin function produces a different subclass.  (This could be mitigated by `Symbol.hasInstance`, however\n   * the TypeScript type system cannot invoke a runtime test.)\n   */\n  export function isBaseClassOf(apiItem: ApiItem): apiItem is ApiTypeParameterListMixin {\n    return apiItem.hasOwnProperty(_typeParameters);\n  }\n}\n"]}