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73 lines
2.7 KiB
TypeScript
73 lines
2.7 KiB
TypeScript
/*
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Copyright (c) 2020 Xiamen Yaji Software Co., Ltd.
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https://www.cocos.com/
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Permission is hereby granted, free of charge, to any person obtaining a copy
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of this software and associated engine source code (the "Software"), a limited,
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worldwide, royalty-free, non-assignable, revocable and non-exclusive license
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to use Cocos Creator solely to develop games on your target platforms. You shall
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not use Cocos Creator software for developing other software or tools that's
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used for developing games. You are not granted to publish, distribute,
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sublicense, and/or sell copies of Cocos Creator.
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The software or tools in this License Agreement are licensed, not sold.
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Xiamen Yaji Software Co., Ltd. reserves all rights not expressly granted to you.
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THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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THE SOFTWARE.
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*/
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import { DEV } from 'internal:constants';
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import { errorID } from '../../platform/debug';
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/**
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* @zh
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* 组合任意多个枚举。
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* 此函数的行为等价于返回了一个新的枚举，其成员囊括了所有源枚举的成员。
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* 这些枚举的成员必须各不相同（包括成员名和值），否则行为是未定义的。
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* @en
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* Combine arbitray number of enumerations.
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* It behaves like an enumeration having members that is a combination of members of the source enumerations
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* is returned.
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* These enumerations shall have non-overlaped member names or member values.
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* If not, the behavior is undefined.
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* @example
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* ```ts
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* enum Apple { apple = 'apple', }
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* enum Pen { pen = 'pen' }
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* // As if `enum ApplePen { apple = 'apple'; pen = 'pen'; }`
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* const ApplePen = extendsEnum(Apple, Pen);
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* ```
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*/
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export function extendsEnum (): {};
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export function extendsEnum<E0> (e0: E0): E0;
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export function extendsEnum<E0, E1> (e0: E0, e1: E1): E0 & E1;
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export function extendsEnum<E0, E1, E2> (e0: E0, e1: E1, e2: E2): E0 & E1 & E2;
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export function extendsEnum<E0, E1, E2, E3> (e0: E0, e1: E1, e2: E2, e3: E3): E0 & E1 & E2 & E3;
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export function extendsEnum (...enums: any[]): any {
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if (DEV) {
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const kvs: PropertyKey[] = [];
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for (const e of enums) {
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for (const kv of Object.keys(e)) {
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if (kvs.indexOf(kv) >= 0) {
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errorID(3659);
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} else {
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kvs.push(kv);
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}
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}
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}
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}
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return Object.assign({}, ...enums);
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}
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