1 // Copyright (C) 2014 Google Inc. 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 // Work-around for problems with the RE2 library. Must be the first #include 16 // statement in the compilation unit. Do not #include in other header files. 17 18 #ifndef I18N_ADDRESSINPUT_UTIL_RE2PTR_H_ 19 #define I18N_ADDRESSINPUT_UTIL_RE2PTR_H_ 20 21 // RE2 will, in some environments, define class RE2 inside namespace re2 and 22 // then have a public "using re2::RE2;" statement to bring that definition into 23 // the root namespace, while in other environments it will define class RE2 24 // directly in the root namespace. 25 // 26 // Because of that, it's impossible to write a portable forward declaration of 27 // class RE2. 28 // 29 // The work-around in this file works by wrapping pointers to RE2 object in the 30 // simple struct RE2ptr, which is trivial to forward declare. 31 32 #include <re2/re2.h> 33 34 namespace i18n { 35 namespace addressinput { 36 37 struct RE2ptr { 38 RE2ptr(RE2* init_ptr) : ptr(init_ptr) {} 39 ~RE2ptr() { delete ptr; } 40 RE2* const ptr; 41 }; 42 43 } // namespace addressinput 44 } // namespace i18n 45 46 #endif // I18N_ADDRESSINPUT_UTIL_RE2PTR_H_ 47
