1// Copyright (C) 2023 The Android Open Source Project 2// 3// Licensed under the Apache License, Version 2.0 (the "License"); 4// you may not use this file except in compliance with the License. 5// You may obtain a copy of the License at 6// 7// http://www.apache.org/licenses/LICENSE-2.0 8// 9// Unless required by applicable law or agreed to in writing, software 10// distributed under the License is distributed on an "AS IS" BASIS, 11// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 12// See the License for the specific language governing permissions and 13// limitations under the License. 14 15// Generic result type - similar to Rust's Result<T, E> or ABSL's StatusOr<T>. 16 17export interface ErrorResult { 18 ok: false; 19 error: string; 20} 21 22export interface OkResult<T> { 23 ok: true; 24 value: T; 25} 26 27export type Result<T> = ErrorResult | OkResult<T>; 28 29export function errResult(message: string): ErrorResult { 30 return {ok: false, error: message}; 31} 32 33export function okResult<T>(value: T): OkResult<T> { 34 return {ok: true, value}; 35} 36