1 #ifndef ANDROID_PDX_RPC_FIND_REPLACE_H_ 2 #define ANDROID_PDX_RPC_FIND_REPLACE_H_ 3 4 #include <type_traits> 5 6 #include <pdx/rpc/copy_cv_reference.h> 7 8 namespace android { 9 namespace pdx { 10 namespace rpc { 11 12 // Utility class to capture types to find and replace. 13 template <typename Find, typename Replace> 14 struct FindReplace; 15 16 template <typename T, typename U> 17 using IsSameBaseType = typename std::is_same<typename std::decay<T>::type, 18 typename std::decay<U>::type>; 19 20 // Replaces the type Subject with type Replace if type Subject is the same type 21 // as type Find, excluding cv-reference qualifiers in the match. 22 template <typename Find, typename Replace, typename Subject> 23 using ReplaceType = 24 typename std::conditional<IsSameBaseType<Find, Subject>::value, 25 CopyCVReferenceType<Subject, Replace>, 26 Subject>::type; 27 28 // Determines whether the type Find (excluding cv-reference qualifiers) is in 29 // the given parameter pack. 30 template <typename Find, typename... Types> 31 struct ContainsType : std::true_type {}; 32 33 template <typename Find, typename First, typename... Rest> 34 struct ContainsType<Find, First, Rest...> 35 : std::conditional<IsSameBaseType<Find, First>::value, std::true_type, 36 ContainsType<Find, Rest...>>::type {}; 37 38 template <typename Find> 39 struct ContainsType<Find> : std::false_type {}; 40 41 } // namespace rpc 42 } // namespace pdx 43 } // namespace android 44 45 #endif // ANDROID_PDX_RPC_FIND_REPLACE_H_ 46
