69 lines
2.7 KiB
TypeScript
69 lines
2.7 KiB
TypeScript
import type { ApiItem, IApiItemJson, IApiItemConstructor, IApiItemOptions } from '../items/ApiItem';
|
|
/**
|
|
* Constructor options for {@link (IApiOptionalMixinOptions:interface)}.
|
|
* @public
|
|
*/
|
|
export interface IApiOptionalMixinOptions extends IApiItemOptions {
|
|
isOptional: boolean;
|
|
}
|
|
export interface IApiOptionalMixinJson extends IApiItemJson {
|
|
isOptional: boolean;
|
|
}
|
|
/**
|
|
* The mixin base class for API items that can be marked as optional by appending a `?` to them.
|
|
* For example, a property of an interface can be optional.
|
|
*
|
|
* @remarks
|
|
*
|
|
* This is part of the {@link ApiModel} hierarchy of classes, which are serializable representations of
|
|
* API declarations. The non-abstract classes (e.g. `ApiClass`, `ApiEnum`, `ApiInterface`, etc.) use
|
|
* TypeScript "mixin" functions (e.g. `ApiDeclaredItem`, `ApiItemContainerMixin`, etc.) to add various
|
|
* features that cannot be represented as a normal inheritance chain (since TypeScript does not allow a child class
|
|
* to extend more than one base class). The "mixin" is a TypeScript merged declaration with three components:
|
|
* the function that generates a subclass, an interface that describes the members of the subclass, and
|
|
* a namespace containing static members of the class.
|
|
*
|
|
* @public
|
|
*/
|
|
export interface ApiOptionalMixin extends ApiItem {
|
|
/**
|
|
* True if this is an optional property.
|
|
* @remarks
|
|
* For example:
|
|
* ```ts
|
|
* interface X {
|
|
* y: string; // not optional
|
|
* z?: string; // optional
|
|
* }
|
|
* ```
|
|
*/
|
|
readonly isOptional: boolean;
|
|
/** @override */
|
|
serializeInto(jsonObject: Partial<IApiItemJson>): void;
|
|
}
|
|
/**
|
|
* Mixin function for {@link (ApiOptionalMixin:interface)}.
|
|
*
|
|
* @param baseClass - The base class to be extended
|
|
* @returns A child class that extends baseClass, adding the {@link (ApiOptionalMixin:interface)} functionality.
|
|
*
|
|
* @public
|
|
*/
|
|
export declare function ApiOptionalMixin<TBaseClass extends IApiItemConstructor>(baseClass: TBaseClass): TBaseClass & (new (...args: any[]) => ApiOptionalMixin);
|
|
/**
|
|
* Optional members for {@link (ApiOptionalMixin:interface)}.
|
|
* @public
|
|
*/
|
|
export declare namespace ApiOptionalMixin {
|
|
/**
|
|
* A type guard that tests whether the specified `ApiItem` subclass extends the `ApiOptionalMixin` mixin.
|
|
*
|
|
* @remarks
|
|
*
|
|
* The JavaScript `instanceof` operator cannot be used to test for mixin inheritance, because each invocation of
|
|
* the mixin function produces a different subclass. (This could be mitigated by `Symbol.hasInstance`, however
|
|
* the TypeScript type system cannot invoke a runtime test.)
|
|
*/
|
|
function isBaseClassOf(apiItem: ApiItem): apiItem is ApiOptionalMixin;
|
|
}
|
|
//# sourceMappingURL=ApiOptionalMixin.d.ts.map
|