1 // Copyright 2014 The Chromium OS Authors. All rights reserved. 2 // Use of this source code is governed by a BSD-style license that can be 3 // found in the LICENSE file. 4 5 #ifndef LIBBRILLO_BRILLO_TYPE_NAME_UNDECORATE_H_ 6 #define LIBBRILLO_BRILLO_TYPE_NAME_UNDECORATE_H_ 7 8 #include <string> 9 #include <typeinfo> 10 11 #include <brillo/brillo_export.h> 12 13 #if !defined(USE_RTTI_FOR_TYPE_TAGS) && !defined(__clang__) 14 // When type information is used with RTTI disabled, we rely on 15 // __PRETTY_FUNCTION__ macro for type tags. Unfortunately gcc and clang produce 16 // different signatures for types that have optional template parameters, such 17 // as std::vector and std::map. The problem arises when inter-operating between 18 // libraries that are compiled with different compilers. 19 // Since most of Brillo is compiled with clang, we choose clang here exclusively 20 // and prevent this code from compiling with GCC to avoid hidden runtime errors. 21 #error TypeInfo/Any with RTTI disabled is supported on clang compiler only. 22 #endif 23 24 namespace brillo { 25 26 template<typename T> 27 const char* GetTypeTag() { 28 #if defined(USE_RTTI_FOR_TYPE_TAGS) && \ 29 (defined(__cpp_rtti) || defined(__GXX_RTTI)) 30 return typeid(T).name(); 31 #else 32 // __PRETTY_FUNCTION__ would include the type T signature and therefore each 33 // instance of brillo::internal_details::GetTypeTag<T>() will have a different 34 // tag string. 35 return __PRETTY_FUNCTION__; 36 #endif 37 } 38 39 // Explicitly instantiate GetTypeTag<T>() for common types to minimize static 40 // data segment pollution. 41 extern template BRILLO_EXPORT const char* GetTypeTag<int8_t>(); 42 extern template BRILLO_EXPORT const char* GetTypeTag<uint8_t>(); 43 extern template BRILLO_EXPORT const char* GetTypeTag<int16_t>(); 44 extern template BRILLO_EXPORT const char* GetTypeTag<uint16_t>(); 45 extern template BRILLO_EXPORT const char* GetTypeTag<int32_t>(); 46 extern template BRILLO_EXPORT const char* GetTypeTag<uint32_t>(); 47 extern template BRILLO_EXPORT const char* GetTypeTag<int64_t>(); 48 extern template BRILLO_EXPORT const char* GetTypeTag<uint64_t>(); 49 extern template BRILLO_EXPORT const char* GetTypeTag<bool>(); 50 extern template BRILLO_EXPORT const char* GetTypeTag<double>(); 51 extern template BRILLO_EXPORT const char* GetTypeTag<std::string>(); 52 53 // Use brillo::UndecorateTypeName() to obtain human-readable type from 54 // the decorated/mangled type name returned by std::type_info::name(). 55 BRILLO_EXPORT std::string UndecorateTypeName(const char* type_name); 56 57 // Returns undecorated type name for the given type tag. This will extract the 58 // actual type name from the type tag string. 59 BRILLO_EXPORT std::string GetUndecoratedTypeNameForTag(const char* type_tag); 60 61 // A template helper function that returns the undecorated type name for type T. 62 template<typename T> 63 inline std::string GetUndecoratedTypeName() { 64 return GetUndecoratedTypeNameForTag(GetTypeTag<T>()); 65 } 66 67 } // namespace brillo 68 69 #endif // LIBBRILLO_BRILLO_TYPE_NAME_UNDECORATE_H_ 70
