| // Copyright 2020 The Pigweed Authors |
| // |
| // Licensed under the Apache License, Version 2.0 (the "License"); you may not |
| // use this file except in compliance with the License. You may obtain a copy of |
| // the License at |
| // |
| // https://www.apache.org/licenses/LICENSE-2.0 |
| // |
| // Unless required by applicable law or agreed to in writing, software |
| // distributed under the License is distributed on an "AS IS" BASIS, WITHOUT |
| // WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the |
| // License for the specific language governing permissions and limitations under |
| // the License. |
| #pragma once |
| |
| // Macros for cleanly working with Status or StatusWithSize objects. |
| #define PW_TRY(expr) _PW_TRY(_PW_TRY_UNIQUE(__LINE__), expr) |
| |
| #define _PW_TRY(result, expr) \ |
| do { \ |
| if (auto result = (expr); !result.ok()) { \ |
| return result; \ |
| } \ |
| } while (0) |
| |
| #define PW_TRY_ASSIGN(assignment_lhs, expression) \ |
| _PW_TRY_ASSIGN(_PW_TRY_UNIQUE(__LINE__), assignment_lhs, expression) |
| |
| #define _PW_TRY_ASSIGN(result, lhs, expr) \ |
| auto result = (expr); \ |
| if (!result.ok()) { \ |
| return result; \ |
| } \ |
| lhs = std::move(result.size()) |
| |
| #define _PW_TRY_UNIQUE(line) _PW_TRY_UNIQUE_EXPANDED(line) |
| #define _PW_TRY_UNIQUE_EXPANDED(line) _pw_try_unique_name_##line |
| |
| #define TRY PW_TRY |
| #define TRY_ASSIGN PW_TRY_ASSIGN |