ceph/src/jaegertracing/opentelemetry-cpp/third_party/prometheus-cpp/3rdparty/googletest/googletest/include/gtest/internal/gtest-type-util.h

   1 // Copyright 2008 Google Inc.
   2 // All Rights Reserved.
   3 //
   4 // Redistribution and use in source and binary forms, with or without
   5 // modification, are permitted provided that the following conditions are
   6 // met:
   7 //
   8 //     * Redistributions of source code must retain the above copyright
   9 // notice, this list of conditions and the following disclaimer.
  10 //     * Redistributions in binary form must reproduce the above
  11 // copyright notice, this list of conditions and the following disclaimer
  12 // in the documentation and/or other materials provided with the
  13 // distribution.
  14 //     * Neither the name of Google Inc. nor the names of its
  15 // contributors may be used to endorse or promote products derived from
  16 // this software without specific prior written permission.
  17 //
  18 // THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
  19 // "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
  20 // LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
  21 // A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
  22 // OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
  23 // SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
  24 // LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  25 // DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  26 // THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  27 // (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
  28 // OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  29
  30 // Type utilities needed for implementing typed and type-parameterized
  31 // tests.
  32
  33 // GOOGLETEST_CM0001 DO NOT DELETE
  34
  35 #ifndef GOOGLETEST_INCLUDE_GTEST_INTERNAL_GTEST_TYPE_UTIL_H_
  36 #define GOOGLETEST_INCLUDE_GTEST_INTERNAL_GTEST_TYPE_UTIL_H_
  37
  38 #include "gtest/internal/gtest-port.h"
  39
  40 // #ifdef __GNUC__ is too general here.  It is possible to use gcc without using
  41 // libstdc++ (which is where cxxabi.h comes from).
  42 # if GTEST_HAS_CXXABI_H_
  43 #  include <cxxabi.h>
  44 # elif defined(__HP_aCC)
  45 #  include <acxx_demangle.h>
  46 # endif  // GTEST_HASH_CXXABI_H_
  47
  48 namespace testing {
  49 namespace internal {
  50
  51 // Canonicalizes a given name with respect to the Standard C++ Library.
  52 // This handles removing the inline namespace within `std` that is
  53 // used by various standard libraries (e.g., `std::__1`).  Names outside
  54 // of namespace std are returned unmodified.
  55 inline std::string CanonicalizeForStdLibVersioning(std::string s) {
  56   static const char prefix[] = "std::__";
  57   if (s.compare(0, strlen(prefix), prefix) == 0) {
  58     std::string::size_type end = s.find("::", strlen(prefix));
  59     if (end != s.npos) {
  60       // Erase everything between the initial `std` and the second `::`.
  61       s.erase(strlen("std"), end - strlen("std"));
  62     }
  63   }
  64   return s;
  65 }
  66
  67 #if GTEST_HAS_RTTI
  68 // GetTypeName(const std::type_info&) returns a human-readable name of type T.
  69 inline std::string GetTypeName(const std::type_info& type) {
  70   const char* const name = type.name();
  71 #if GTEST_HAS_CXXABI_H_ || defined(__HP_aCC)
  72   int status = 0;
  73   // gcc's implementation of typeid(T).name() mangles the type name,
  74   // so we have to demangle it.
  75 #if GTEST_HAS_CXXABI_H_
  76   using abi::__cxa_demangle;
  77 #endif  // GTEST_HAS_CXXABI_H_
  78   char* const readable_name = __cxa_demangle(name, nullptr, nullptr, &status);
  79   const std::string name_str(status == 0 ? readable_name : name);
  80   free(readable_name);
  81   return CanonicalizeForStdLibVersioning(name_str);
  82 #else
  83   return name;
  84 #endif  // GTEST_HAS_CXXABI_H_ || __HP_aCC
  85 }
  86 #endif  // GTEST_HAS_RTTI
  87
  88 // GetTypeName<T>() returns a human-readable name of type T if and only if
  89 // RTTI is enabled, otherwise it returns a dummy type name.
  90 // NB: This function is also used in Google Mock, so don't move it inside of
  91 // the typed-test-only section below.
  92 template <typename T>
  93 std::string GetTypeName() {
  94 #if GTEST_HAS_RTTI
  95   return GetTypeName(typeid(T));
  96 #else
  97   return "<type>";
  98 #endif  // GTEST_HAS_RTTI
  99 }
 100
 101 // A unique type indicating an empty node
 102 struct None {};
 103
 104 # define GTEST_TEMPLATE_ template <typename T> class
 105
 106 // The template "selector" struct TemplateSel<Tmpl> is used to
 107 // represent Tmpl, which must be a class template with one type
 108 // parameter, as a type.  TemplateSel<Tmpl>::Bind<T>::type is defined
 109 // as the type Tmpl<T>.  This allows us to actually instantiate the
 110 // template "selected" by TemplateSel<Tmpl>.
 111 //
 112 // This trick is necessary for simulating typedef for class templates,
 113 // which C++ doesn't support directly.
 114 template <GTEST_TEMPLATE_ Tmpl>
 115 struct TemplateSel {
 116   template <typename T>
 117   struct Bind {
 118     typedef Tmpl<T> type;
 119   };
 120 };
 121
 122 # define GTEST_BIND_(TmplSel, T) \
 123   TmplSel::template Bind<T>::type
 124
 125 template <GTEST_TEMPLATE_ Head_, GTEST_TEMPLATE_... Tail_>
 126 struct Templates {
 127   using Head = TemplateSel<Head_>;
 128   using Tail = Templates<Tail_...>;
 129 };
 130
 131 template <GTEST_TEMPLATE_ Head_>
 132 struct Templates<Head_> {
 133   using Head = TemplateSel<Head_>;
 134   using Tail = None;
 135 };
 136
 137 // Tuple-like type lists
 138 template <typename Head_, typename... Tail_>
 139 struct Types {
 140   using Head = Head_;
 141   using Tail = Types<Tail_...>;
 142 };
 143
 144 template <typename Head_>
 145 struct Types<Head_> {
 146   using Head = Head_;
 147   using Tail = None;
 148 };
 149
 150 // Helper metafunctions to tell apart a single type from types
 151 // generated by ::testing::Types
 152 template <typename... Ts>
 153 struct ProxyTypeList {
 154   using type = Types<Ts...>;
 155 };
 156
 157 template <typename>
 158 struct is_proxy_type_list : std::false_type {};
 159
 160 template <typename... Ts>
 161 struct is_proxy_type_list<ProxyTypeList<Ts...>> : std::true_type {};
 162
 163 // Generator which conditionally creates type lists.
 164 // It recognizes if a requested type list should be created
 165 // and prevents creating a new type list nested within another one.
 166 template <typename T>
 167 struct GenerateTypeList {
 168  private:
 169   using proxy = typename std::conditional<is_proxy_type_list<T>::value, T,
 170                                           ProxyTypeList<T>>::type;
 171
 172  public:
 173   using type = typename proxy::type;
 174 };
 175
 176 }  // namespace internal
 177
 178 template <typename... Ts>
 179 using Types = internal::ProxyTypeList<Ts...>;
 180
 181 }  // namespace testing
 182
 183 #endif  // GOOGLETEST_INCLUDE_GTEST_INTERNAL_GTEST_TYPE_UTIL_H_