[p-reflect] add typings (#18863)

types/p-reflect/index.d.ts

@@ -0,0 +1,24 @@
+// Type definitions for p-reflect 1.0
+// Project: https://github.com/sindresorhus/p-reflect#readme
+// Definitions by: BendingBender <https://github.com/BendingBender>
+// Definitions: https://github.com/DefinitelyTyped/DefinitelyTyped
+
+export = pReflect;
+
+declare function pReflect<T>(promise: PromiseLike<T>): Promise<pReflect.PromiseResult<T>>;
+
+declare namespace pReflect {
+    type PromiseResult<T> = PromiseFulfilledResult<T> | PromiseRejectedResult;
+
+    interface PromiseFulfilledResult<T> {
+        isFulfilled: true;
+        isRejected: false;
+        value: T;
+    }
+
+    interface PromiseRejectedResult {
+        isFulfilled: false;
+        isRejected: true;
+        reason: any;
+    }
+}

types/p-reflect/p-reflect-tests.ts

@@ -0,0 +1,15 @@
+import pReflect = require('p-reflect');
+
+pReflect(Promise.resolve('foo')).then(result => {
+    if (result.isFulfilled) {
+        const fulfilled: true = result.isFulfilled;
+        const rejected: false = result.isRejected;
+        const str: string = result.value;
+        result.reason; // $ExpectError
+    } else {
+        const fulfilled: false = result.isFulfilled;
+        const rejected: true = result.isRejected;
+        const err: any = result.reason;
+        result.value; // $ExpectError
+    }
+});

types/p-reflect/tsconfig.json

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+{
+    "compilerOptions": {
+        "module": "commonjs",
+        "lib": [
+            "es6"
+        ],
+        "noImplicitAny": true,
+        "noImplicitThis": true,
+        "strictNullChecks": true,
+        "baseUrl": "../",
+        "typeRoots": [
+            "../"
+        ],
+        "types": [],
+        "noEmit": true,
+        "forceConsistentCasingInFileNames": true
+    },
+    "files": [
+        "index.d.ts",
+        "p-reflect-tests.ts"
+    ]
+}

types/p-reflect/tslint.json

@@ -0,0 +1 @@
+{ "extends": "dtslint/dt.json" }