1 /* 2 * Copyright (C) 2019 The Android Open Source Project 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16 17 #ifndef ART_LIBARTBASE_BASE_STRING_VIEW_CPP20_H_ 18 #define ART_LIBARTBASE_BASE_STRING_VIEW_CPP20_H_ 19 20 #include <string_view> 21 22 namespace art { 23 24 // Replacement functions for std::string_view::starts_with(), ends_with() 25 // which shall be available in C++20. 26 #if __cplusplus >= 202000L 27 #error "When upgrading to C++20, remove this error and file a bug to remove this workaround." 28 #endif 29 30 inline bool StartsWith(std::string_view sv, std::string_view prefix) { 31 return sv.substr(0u, prefix.size()) == prefix; 32 } 33 34 inline bool EndsWith(std::string_view sv, std::string_view suffix) { 35 return sv.size() >= suffix.size() && sv.substr(sv.size() - suffix.size()) == suffix; 36 } 37 38 } // namespace art 39 40 #endif // ART_LIBARTBASE_BASE_STRING_VIEW_CPP20_H_ 41