2019-02-28 23:56:35 +01:00
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// Copyright 2016-2018, Pulumi Corporation.
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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2019-07-19 02:19:41 +02:00
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import { InvokeOptions } from "./invoke";
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2019-02-28 23:56:35 +01:00
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/**
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* Common code for doing RTTI typechecks. RTTI is done by having a boolean property on an object
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* with a special name (like "__resource" or "__asset"). This function checks that the object
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* exists, has a **boolean** property with that name, and that that boolean property has the value
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* of 'true'. Checking that property is 'boolean' helps ensure that this test works even on proxies
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* that synthesize properties dynamically (like Output). Checking that the property has the 'true'
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* value isn't strictly necessary, but works to make sure that the impls are following a common
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* pattern.
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*/
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/** @internal */
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export function isInstance<T>(obj: any, name: keyof T): obj is T {
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return hasTrueBooleanMember(obj, name);
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}
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/** @internal */
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export function hasTrueBooleanMember(obj: any, memberName: string | number | symbol): boolean {
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if (obj === undefined || obj === null) {
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return false;
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}
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const val = obj[memberName];
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if (typeof val !== "boolean") {
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return false;
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}
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return val === true;
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}
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2019-06-17 21:25:56 +02:00
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2019-08-08 21:11:46 +02:00
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// Workaround errors we sometimes get on some machines saying that Object.values is not available.
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/** @internal */
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export function values(obj: object): any[] {
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const result: any[] = [];
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for (const key of Object.keys(obj)) {
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result.push((<any>obj)[key]);
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}
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return result;
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}
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