1 // Copyright 2023 Google LLC 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 // https://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 #ifndef ANONYMOUS_TOKENS_CPP_SHARED_STATUS_UTILS_H_ 16 #define ANONYMOUS_TOKENS_CPP_SHARED_STATUS_UTILS_H_ 17 18 #include "absl/base/optimization.h" 19 #include "absl/status/status.h" 20 21 namespace anonymous_tokens { 22 23 #define _ANON_TOKENS_STATUS_MACROS_CONCAT_NAME(x, y) \ 24 _ANON_TOKENS_STATUS_MACROS_CONCAT_IMPL(x, y) 25 #define _ANON_TOKENS_STATUS_MACROS_CONCAT_IMPL(x, y) x##y 26 27 #define ANON_TOKENS_ASSIGN_OR_RETURN(lhs, rexpr) \ 28 _ANON_TOKENS_ASSIGN_OR_RETURN_IMPL( \ 29 _ANON_TOKENS_STATUS_MACROS_CONCAT_NAME(_status_or_val, __LINE__), lhs, \ 30 rexpr) 31 32 #define _ANON_TOKENS_ASSIGN_OR_RETURN_IMPL(statusor, lhs, rexpr) \ 33 auto statusor = (rexpr); \ 34 if (ABSL_PREDICT_FALSE(!statusor.ok())) { \ 35 return statusor.status(); \ 36 } \ 37 lhs = *std::move(statusor) 38 39 #define ANON_TOKENS_RETURN_IF_ERROR(expr) \ 40 do { \ 41 auto _status = (expr); \ 42 if (ABSL_PREDICT_FALSE(!_status.ok())) return _status; \ 43 } while (0) 44 45 } // namespace anonymous_tokens 46 47 #endif // ANONYMOUS_TOKENS_CPP_SHARED_STATUS_UTILS_H_ 48