1 // Copyright 2024 The Abseil Authors 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 // https://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 #ifndef ABSL_STRINGS_INTERNAL_HAS_ABSL_STRINGIFY_H_ 16 #define ABSL_STRINGS_INTERNAL_HAS_ABSL_STRINGIFY_H_ 17 18 #include "absl/strings/has_absl_stringify.h" 19 20 #include <type_traits> 21 #include <utility> 22 23 #include "absl/base/config.h" 24 25 namespace absl { 26 ABSL_NAMESPACE_BEGIN 27 28 namespace strings_internal { 29 30 // This exists to fix a circular dependency problem with the GoogleTest release. 31 // GoogleTest referenced this internal file and this internal trait. Since 32 // simultaneous releases are not possible since once release must reference 33 // another, we will temporarily add this back. 34 // https://github.com/google/googletest/blob/v1.14.x/googletest/include/gtest/gtest-printers.h#L119 35 // 36 // This file can be deleted after the next Abseil and GoogleTest release. 37 // 38 // https://github.com/google/googletest/pull/4368#issuecomment-1717699895 39 // https://github.com/google/googletest/pull/4368#issuecomment-1717699895 40 template <typename T, typename = void> 41 struct HasAbslStringify : std::false_type {}; 42 43 template <typename T> 44 struct HasAbslStringify< 45 T, std::enable_if_t<std::is_void<decltype(AbslStringify( 46 std::declval<strings_internal::UnimplementedSink&>(), 47 std::declval<const T&>()))>::value>> : std::true_type {}; 48 49 } // namespace strings_internal 50 51 ABSL_NAMESPACE_END 52 } // namespace absl 53 54 #endif // ABSL_STRINGS_INTERNAL_HAS_ABSL_STRINGIFY_H_ 55