dbsxdbsx edited a comment on issue #14385: OpenCV 4.0 is currently not support on win10 URL: https://github.com/apache/incubator-mxnet/issues/14385#issuecomment-471390025 @wkcn，for context of error message, the blew is the total errors: ``` 严重性 代码 说明 项目 文件 行 禁止显示状态 错误 MSB3721 命令“"C:\Program Files\NVIDIA GPU Computing Toolkit\CUDA\v10.1\bin\nvcc.exe" -gencode=arch=compute_50,code=\"sm_50,compute_50\" --use-local-env -ccbin "C:\Program Files (x86)\Microsoft Visual Studio 14.0\VC\bin\x86_amd64" -x cu -I"C:\Program Files (x86)\IntelSWTools\compilers_and_libraries_2019.2.190\windows\mkl\include" -IC:\mxnet\3rdparty\mkldnn\include -IC:\mxnet\include -IC:\mxnet\src -IC:\mxnet\3rdparty\mshadow -IC:\mxnet\3rdparty\cub -IC:\mxnet\3rdparty\tvm\nnvm\include -IC:\mxnet\3rdparty\tvm\include -I"C:\mxnet\3rdparty\dmlc-core\include" -IC:\mxnet\3rdparty\dlpack\include -IC:\opencv4\build\include -I"C:\Program Files\NVIDIA GPU Computing Toolkit\CUDA\v10.1\include" -I"C:\Program Files\NVIDIA GPU Computing Toolkit\CUDA\v10.1\include" --keep-dir x64\Release -maxrregcount=0 --machine 64 --compile -cudart static -Xcompiler="/MP /bigobj -openmp -Ob2 -Gy" -DNDEBUG -DWIN32_LEAN_AND_MEAN -DDMLC_USE_CXX11 -DMSHADOW_IN_CXX11 -D_SCL_SECURE_NO_WARNINGS -D_CRT_SECURE_NO_WARNINGS -DMXNET_EXPORTS -DNNVM_EXPORTS -DDMLC_STRICT_CXX11 -DNOMINMAX -DUSE_MKL=1 -DCUB_MKL=1 -DMXNET_USE_MKLDNN=1 -DMSHADOW_USE_CUDA=1 -DMXNET_USE_NCCL=0 -DUSE_MKL -DUSE_CBLAS -DMSHADOW_USE_CBLAS=0 -DMSHADOW_USE_MKL=1 -DMXNET_USE_BLAS_MKL=1 -DMXNET_USE_OPENCV=1 -DMXNET_USE_OPENMP=1 -DMXNET_USE_LAPACK=1 -DUSE_CUDNN -DMSHADOW_USE_CUDNN=1 -DMXNET_ENABLE_CUDA_RTC=1 -DMXNET_USE_CUDA=1 -D"CMAKE_INTDIR=\"Release\"" -Dmxnet_EXPORTS -DNDEBUG -DWIN32_LEAN_AND_MEAN -DDMLC_USE_CXX11 -DMSHADOW_IN_CXX11 -D_SCL_SECURE_NO_WARNINGS -D_CRT_SECURE_NO_WARNINGS -DMXNET_EXPORTS -DNNVM_EXPORTS -DDMLC_STRICT_CXX11 -DNOMINMAX -DUSE_MKL=1 -DCUB_MKL=1 -DMXNET_USE_MKLDNN=1 -DMSHADOW_USE_CUDA=1 -DMXNET_USE_NCCL=0 -DUSE_MKL -DUSE_CBLAS -DMSHADOW_USE_CBLAS=0 -DMSHADOW_USE_MKL=1 -DMXNET_USE_BLAS_MKL=1 -DMXNET_USE_OPENCV=1 -DMXNET_USE_OPENMP=1 -DMXNET_USE_LAPACK=1 -DUSE_CUDNN -DMSHADOW_USE_CUDNN=1 -DMXNET_ENABLE_CUDA_RTC=1 -DMXNET_USE_CUDA=1 -D"CMAKE_INTDIR=\"Release\"" -Dmxnet_EXPORTS -D_WINDLL -D_MBCS -Xcompiler "/EHsc /W1 /nologo /O2 /Fdmxnet.dir\Release\vc140.pdb /FS /Zi /MT " -o mxnet.dir\Release\/src/operator/image/resize.cu.obj "C:\mxnet\src\operator\image\resize.cu"”已退出，返回代码为 1。 mxnet C:\Program Files (x86)\MSBuild\Microsoft.Cpp\v4.0\V140\BuildCustomizations\CUDA 10.1.targets 757 错误 template instantiation resulted in unexpected function type of "std::true_type (std::integral_constant<__nv_bool, false> *)" (the meaning of a name may have changed since the template declaration -- the type of the template is "std::true_type (std::is_same<std::decay<decltype((<expression>))>::type, void>::type *)") mxnet c:\opencv4\build\include\opencv2\core\cvstd_wrapper.hpp 49 错误 template instantiation resulted in unexpected function type of "std::true_type (std::integral_constant<__nv_bool, false> *)" (the meaning of a name may have changed since the template declaration -- the type of the template is "std::true_type (std::is_same<std::decay<decltype((<expression>))>::type, void>::type *)") mxnet c:\opencv4\build\include\opencv2\core\cvstd_wrapper.hpp 49 错误 template instantiation resulted in unexpected function type of "std::true_type (std::integral_constant<__nv_bool, false> *)" (the meaning of a name may have changed since the template declaration -- the type of the template is "std::true_type (std::is_same<std::decay<decltype((<expression>))>::type, void>::type *)") mxnet c:\opencv4\build\include\opencv2\core\cvstd_wrapper.hpp 49 错误 template instantiation resulted in unexpected function type of "std::true_type (std::integral_constant<__nv_bool, false> *)" (the meaning of a name may have changed since the template declaration -- the type of the template is "std::true_type (std::is_same<std::decay<decltype((<expression>))>::type, void>::type *)") mxnet c:\opencv4\build\include\opencv2\core\cvstd_wrapper.hpp 49 错误 template instantiation resulted in unexpected function type of "std::true_type (std::integral_constant<__nv_bool, false> *)" (the meaning of a name may have changed since the template declaration -- the type of the template is "std::true_type (std::is_same<std::decay<decltype((<expression>))>::type, void>::type *)") mxnet c:\opencv4\build\include\opencv2\core\cvstd_wrapper.hpp 49 错误 template instantiation resulted in unexpected function type of "std::true_type (std::integral_constant<__nv_bool, false> *)" (the meaning of a name may have changed since the template declaration -- the type of the template is "std::true_type (std::is_same<std::decay<decltype((<expression>))>::type, void>::type *)") mxnet c:\opencv4\build\include\opencv2\core\cvstd_wrapper.hpp 49 错误 template instantiation resulted in unexpected function type of "std::true_type (std::integral_constant<__nv_bool, false> *)" (the meaning of a name may have changed since the template declaration -- the type of the template is "std::true_type (std::is_same<std::decay<decltype((<expression>))>::type, void>::type *)") mxnet c:\opencv4\build\include\opencv2\core\cvstd_wrapper.hpp 49 错误 template instantiation resulted in unexpected function type of "std::true_type (std::integral_constant<__nv_bool, false> *)" (the meaning of a name may have changed since the template declaration -- the type of the template is "std::true_type (std::is_same<std::decay<decltype((<expression>))>::type, void>::type *)") mxnet c:\opencv4\build\include\opencv2\core\cvstd_wrapper.hpp 49 错误 template instantiation resulted in unexpected function type of "std::true_type (std::integral_constant<__nv_bool, false> *)" (the meaning of a name may have changed since the template declaration -- the type of the template is "std::true_type (std::is_same<std::decay<decltype((<expression>))>::type, void>::type *)") mxnet c:\opencv4\build\include\opencv2\core\cvstd_wrapper.hpp 49 错误 template instantiation resulted in unexpected function type of "std::true_type (std::integral_constant<__nv_bool, false> *)" (the meaning of a name may have changed since the template declaration -- the type of the template is "std::true_type (std::is_same<std::decay<decltype((<expression>))>::type, void>::type *)") mxnet c:\opencv4\build\include\opencv2\core\cvstd_wrapper.hpp 49 错误 template instantiation resulted in unexpected function type of "std::true_type (std::integral_constant<__nv_bool, false> *)" (the meaning of a name may have changed since the template declaration -- the type of the template is "std::true_type (std::is_same<std::decay<decltype((<expression>))>::type, void>::type *)") mxnet c:\opencv4\build\include\opencv2\core\cvstd_wrapper.hpp 49 错误 template instantiation resulted in unexpected function type of "std::true_type (std::integral_constant<__nv_bool, false> *)" (the meaning of a name may have changed since the template declaration -- the type of the template is "std::true_type (std::is_same<std::decay<decltype((<expression>))>::type, void>::type *)") mxnet c:\opencv4\build\include\opencv2\core\cvstd_wrapper.hpp 49 错误 template instantiation resulted in unexpected function type of "std::true_type (std::integral_constant<__nv_bool, false> *)" (the meaning of a name may have changed since the template declaration -- the type of the template is "std::true_type (std::is_same<std::decay<decltype((<expression>))>::type, void>::type *)") mxnet c:\opencv4\build\include\opencv2\core\cvstd_wrapper.hpp 49 错误 template instantiation resulted in unexpected function type of "std::true_type (std::integral_constant<__nv_bool, false> *)" (the meaning of a name may have changed since the template declaration -- the type of the template is "std::true_type (std::is_same<std::decay<decltype((<expression>))>::type, void>::type *)") mxnet c:\opencv4\build\include\opencv2\core\cvstd_wrapper.hpp 49 错误 template instantiation resulted in unexpected function type of "std::true_type (std::integral_constant<__nv_bool, false> *)" (the meaning of a name may have changed since the template declaration -- the type of the template is "std::true_type (std::is_same<std::decay<decltype((<expression>))>::type, void>::type *)") mxnet c:\opencv4\build\include\opencv2\core\cvstd_wrapper.hpp 49 错误 MSB3721 命令“"C:\Program Files\NVIDIA GPU Computing Toolkit\CUDA\v10.1\bin\nvcc.exe" -gencode=arch=compute_50,code=\"sm_50,compute_50\" --use-local-env -ccbin "C:\Program Files (x86)\Microsoft Visual Studio 14.0\VC\bin\x86_amd64" -x cu -I"C:\Program Files (x86)\IntelSWTools\compilers_and_libraries_2019.2.190\windows\mkl\include" -IC:\mxnet\3rdparty\mkldnn\include -IC:\mxnet\include -IC:\mxnet\src -IC:\mxnet\3rdparty\mshadow -IC:\mxnet\3rdparty\cub -IC:\mxnet\3rdparty\tvm\nnvm\include -IC:\mxnet\3rdparty\tvm\include -I"C:\mxnet\3rdparty\dmlc-core\include" -IC:\mxnet\3rdparty\dlpack\include -IC:\opencv4\build\include -I"C:\Program Files\NVIDIA GPU Computing Toolkit\CUDA\v10.1\include" -I"C:\Program Files\NVIDIA GPU Computing Toolkit\CUDA\v10.1\include" --keep-dir x64\Release -maxrregcount=0 --machine 64 --compile -cudart static -Xcompiler="/MP /bigobj -openmp -Ob2 -Gy" -DNDEBUG -DWIN32_LEAN_AND_MEAN -DDMLC_USE_CXX11 -DMSHADOW_IN_CXX11 -D_SCL_SECURE_NO_WARNINGS -D_CRT_SECURE_NO_WARNINGS -DMXNET_EXPORTS -DNNVM_EXPORTS -DDMLC_STRICT_CXX11 -DNOMINMAX -DUSE_MKL=1 -DCUB_MKL=1 -DMXNET_USE_MKLDNN=1 -DMSHADOW_USE_CUDA=1 -DMXNET_USE_NCCL=0 -DUSE_MKL -DUSE_CBLAS -DMSHADOW_USE_CBLAS=0 -DMSHADOW_USE_MKL=1 -DMXNET_USE_BLAS_MKL=1 -DMXNET_USE_OPENCV=1 -DMXNET_USE_OPENMP=1 -DMXNET_USE_LAPACK=1 -DUSE_CUDNN -DMSHADOW_USE_CUDNN=1 -DMXNET_ENABLE_CUDA_RTC=1 -DMXNET_USE_CUDA=1 -D"CMAKE_INTDIR=\"Release\"" -Dmxnet_EXPORTS -DNDEBUG -DWIN32_LEAN_AND_MEAN -DDMLC_USE_CXX11 -DMSHADOW_IN_CXX11 -D_SCL_SECURE_NO_WARNINGS -D_CRT_SECURE_NO_WARNINGS -DMXNET_EXPORTS -DNNVM_EXPORTS -DDMLC_STRICT_CXX11 -DNOMINMAX -DUSE_MKL=1 -DCUB_MKL=1 -DMXNET_USE_MKLDNN=1 -DMSHADOW_USE_CUDA=1 -DMXNET_USE_NCCL=0 -DUSE_MKL -DUSE_CBLAS -DMSHADOW_USE_CBLAS=0 -DMSHADOW_USE_MKL=1 -DMXNET_USE_BLAS_MKL=1 -DMXNET_USE_OPENCV=1 -DMXNET_USE_OPENMP=1 -DMXNET_USE_LAPACK=1 -DUSE_CUDNN -DMSHADOW_USE_CUDNN=1 -DMXNET_ENABLE_CUDA_RTC=1 -DMXNET_USE_CUDA=1 -D"CMAKE_INTDIR=\"Release\"" -Dmxnet_EXPORTS -D_WINDLL -D_MBCS -Xcompiler "/EHsc /W1 /nologo /O2 /Fdmxnet.dir\Release\vc140.pdb /FS /Zi /MT " -o mxnet.dir\Release\/src/operator/image/image_random.cu.obj "C:\mxnet\src\operator\image\image_random.cu"”已退出，返回代码为 1。 mxnet C:\Program Files (x86)\MSBuild\Microsoft.Cpp\v4.0\V140\BuildCustomizations\CUDA 10.1.targets 757 错误 incomplete type is not allowed mxnet c:\opencv4\build\include\opencv2\core\cvstd_wrapper.hpp 45 错误 incomplete type is not allowed mxnet c:\opencv4\build\include\opencv2\core\cvstd_wrapper.hpp 45 错误 incomplete type is not allowed mxnet c:\opencv4\build\include\opencv2\core\cvstd_wrapper.hpp 45 错误 incomplete type is not allowed mxnet c:\opencv4\build\include\opencv2\core\cvstd_wrapper.hpp 45 错误 incomplete type is not allowed mxnet c:\opencv4\build\include\opencv2\core\cvstd_wrapper.hpp 45 错误 incomplete type is not allowed mxnet c:\opencv4\build\include\opencv2\core\cvstd_wrapper.hpp 45 错误 incomplete type is not allowed mxnet c:\opencv4\build\include\opencv2\core\cvstd_wrapper.hpp 45 错误 incomplete type is not allowed mxnet c:\opencv4\build\include\opencv2\core\cvstd_wrapper.hpp 45 错误 incomplete type is not allowed mxnet c:\opencv4\build\include\opencv2\core\cvstd_wrapper.hpp 45 错误 incomplete type is not allowed mxnet c:\opencv4\build\include\opencv2\core\cvstd_wrapper.hpp 45 错误 incomplete type is not allowed mxnet c:\opencv4\build\include\opencv2\core\cvstd_wrapper.hpp 45 错误 incomplete type is not allowed mxnet c:\opencv4\build\include\opencv2\core\cvstd_wrapper.hpp 45 错误 incomplete type is not allowed mxnet c:\opencv4\build\include\opencv2\core\cvstd_wrapper.hpp 45 错误 incomplete type is not allowed mxnet c:\opencv4\build\include\opencv2\core\cvstd_wrapper.hpp 45 错误 incomplete type is not allowed mxnet c:\opencv4\build\include\opencv2\core\cvstd_wrapper.hpp 45 错误 incomplete type is not allowed mxnet c:\opencv4\build\include\opencv2\core\cvstd_wrapper.hpp 45 错误 incomplete type is not allowed mxnet c:\opencv4\build\include\opencv2\core\cvstd_wrapper.hpp 45 错误 incomplete type is not allowed mxnet c:\opencv4\build\include\opencv2\core\cvstd_wrapper.hpp 45 错误 incomplete type is not allowed mxnet c:\opencv4\build\include\opencv2\core\cvstd_wrapper.hpp 45 错误 incomplete type is not allowed mxnet c:\opencv4\build\include\opencv2\core\cvstd_wrapper.hpp 45 错误 incomplete type is not allowed mxnet c:\opencv4\build\include\opencv2\core\cvstd_wrapper.hpp 45 错误 incomplete type is not allowed mxnet c:\opencv4\build\include\opencv2\core\cvstd_wrapper.hpp 45 错误 incomplete type is not allowed mxnet c:\opencv4\build\include\opencv2\core\cvstd_wrapper.hpp 45 错误 incomplete type is not allowed mxnet c:\opencv4\build\include\opencv2\core\cvstd_wrapper.hpp 45 错误 name followed by "::" must be a class or namespace name mxnet c:\opencv4\build\include\opencv2\core\cvstd_wrapper.hpp 52 错误 name followed by "::" must be a class or namespace name mxnet c:\opencv4\build\include\opencv2\core\cvstd_wrapper.hpp 52 错误 name followed by "::" must be a class or namespace name mxnet c:\opencv4\build\include\opencv2\core\cvstd_wrapper.hpp 52 错误 name followed by "::" must be a class or namespace name mxnet c:\opencv4\build\include\opencv2\core\cvstd_wrapper.hpp 52 错误 name followed by "::" must be a class or namespace name mxnet c:\opencv4\build\include\opencv2\core\cvstd_wrapper.hpp 52 错误 name followed by "::" must be a class or namespace name mxnet c:\opencv4\build\include\opencv2\core\cvstd_wrapper.hpp 52 错误 name followed by "::" must be a class or namespace name mxnet c:\opencv4\build\include\opencv2\core\cvstd_wrapper.hpp 52 错误 name followed by "::" must be a class or namespace name mxnet c:\opencv4\build\include\opencv2\core\cvstd_wrapper.hpp 52 错误 name followed by "::" must be a class or namespace name mxnet c:\opencv4\build\include\opencv2\core\cvstd_wrapper.hpp 52 错误 name followed by "::" must be a class or namespace name mxnet c:\opencv4\build\include\opencv2\core\cvstd_wrapper.hpp 52 错误 name followed by "::" must be a class or namespace name mxnet c:\opencv4\build\include\opencv2\core\cvstd_wrapper.hpp 52 错误 name followed by "::" must be a class or namespace name mxnet c:\opencv4\build\include\opencv2\core\cvstd_wrapper.hpp 52 错误 name followed by "::" must be a class or namespace name mxnet c:\opencv4\build\include\opencv2\core\cvstd_wrapper.hpp 52 错误 name followed by "::" must be a class or namespace name mxnet c:\opencv4\build\include\opencv2\core\cvstd_wrapper.hpp 52 错误 name followed by "::" must be a class or namespace name mxnet c:\opencv4\build\include\opencv2\core\cvstd_wrapper.hpp 52 错误 name followed by "::" must be a class or namespace name mxnet c:\opencv4\build\include\opencv2\core\cvstd_wrapper.hpp 52 错误 name followed by "::" must be a class or namespace name mxnet c:\opencv4\build\include\opencv2\core\cvstd_wrapper.hpp 52 错误 name followed by "::" must be a class or namespace name mxnet c:\opencv4\build\include\opencv2\core\cvstd_wrapper.hpp 52 错误 name followed by "::" must be a class or namespace name mxnet c:\opencv4\build\include\opencv2\core\cvstd_wrapper.hpp 52 错误 name followed by "::" must be a class or namespace name mxnet c:\opencv4\build\include\opencv2\core\cvstd_wrapper.hpp 52 错误 name followed by "::" must be a class or namespace name mxnet c:\opencv4\build\include\opencv2\core\cvstd_wrapper.hpp 52 错误 name followed by "::" must be a class or namespace name mxnet c:\opencv4\build\include\opencv2\core\cvstd_wrapper.hpp 52 错误 name followed by "::" must be a class or namespace name mxnet c:\opencv4\build\include\opencv2\core\cvstd_wrapper.hpp 52 错误 name followed by "::" must be a class or namespace name mxnet c:\opencv4\build\include\opencv2\core\cvstd_wrapper.hpp 52 错误 template instantiation resulted in unexpected function type of "std::true_type (std::integral_constant<__nv_bool, false> *)" (the meaning of a name may have changed since the template declaration -- the type of the template is "std::true_type (std::is_same<std::decay<decltype((<expression>))>::type, void>::type *)") mxnet c:\opencv4\build\include\opencv2\core\cvstd_wrapper.hpp 49 错误 template instantiation resulted in unexpected function type of "std::true_type (std::integral_constant<__nv_bool, false> *)" (the meaning of a name may have changed since the template declaration -- the type of the template is "std::true_type (std::is_same<std::decay<decltype((<expression>))>::type, void>::type *)") mxnet c:\opencv4\build\include\opencv2\core\cvstd_wrapper.hpp 49 错误 template instantiation resulted in unexpected function type of "std::true_type (std::integral_constant<__nv_bool, false> *)" (the meaning of a name may have changed since the template declaration -- the type of the template is "std::true_type (std::is_same<std::decay<decltype((<expression>))>::type, void>::type *)") mxnet c:\opencv4\build\include\opencv2\core\cvstd_wrapper.hpp 49 错误 template instantiation resulted in unexpected function type of "std::true_type (std::integral_constant<__nv_bool, false> *)" (the meaning of a name may have changed since the template declaration -- the type of the template is "std::true_type (std::is_same<std::decay<decltype((<expression>))>::type, void>::type *)") mxnet c:\opencv4\build\include\opencv2\core\cvstd_wrapper.hpp 49 错误 template instantiation resulted in unexpected function type of "std::true_type (std::integral_constant<__nv_bool, false> *)" (the meaning of a name may have changed since the template declaration -- the type of the template is "std::true_type (std::is_same<std::decay<decltype((<expression>))>::type, void>::type *)") mxnet c:\opencv4\build\include\opencv2\core\cvstd_wrapper.hpp 49 错误 template instantiation resulted in unexpected function type of "std::true_type (std::integral_constant<__nv_bool, false> *)" (the meaning of a name may have changed since the template declaration -- the type of the template is "std::true_type (std::is_same<std::decay<decltype((<expression>))>::type, void>::type *)") mxnet c:\opencv4\build\include\opencv2\core\cvstd_wrapper.hpp 49 错误 template instantiation resulted in unexpected function type of "std::true_type (std::integral_constant<__nv_bool, false> *)" (the meaning of a name may have changed since the template declaration -- the type of the template is "std::true_type (std::is_same<std::decay<decltype((<expression>))>::type, void>::type *)") mxnet c:\opencv4\build\include\opencv2\core\cvstd_wrapper.hpp 49 错误 template instantiation resulted in unexpected function type of "std::true_type (std::integral_constant<__nv_bool, false> *)" (the meaning of a name may have changed since the template declaration -- the type of the template is "std::true_type (std::is_same<std::decay<decltype((<expression>))>::type, void>::type *)") mxnet c:\opencv4\build\include\opencv2\core\cvstd_wrapper.hpp 49 错误 template instantiation resulted in unexpected function type of "std::true_type (std::integral_constant<__nv_bool, false> *)" (the meaning of a name may have changed since the template declaration -- the type of the template is "std::true_type (std::is_same<std::decay<decltype((<expression>))>::type, void>::type *)") mxnet c:\opencv4\build\include\opencv2\core\cvstd_wrapper.hpp 49 ``` for code of `cvstd_wrapper.hpp` in OPENCV4.0: ``` // This file is part of OpenCV project. // It is subject to the license terms in the LICENSE file found in the top-level directory // of this distribution and at http://opencv.org/license.html. #ifndef OPENCV_CORE_CVSTD_WRAPPER_HPP #define OPENCV_CORE_CVSTD_WRAPPER_HPP #include "opencv2/core/cvdef.h" #include <string> #include <memory> // std::shared_ptr #include <type_traits> // std::enable_if namespace cv { using std::nullptr_t; //! @addtogroup core_basic //! @{ #ifdef CV_DOXYGEN template <typename _Tp> using Ptr = std::shared_ptr<_Tp>; // In ideal world it should look like this, but we need some compatibility workarounds below template<typename _Tp, typename ... A1> static inline Ptr<_Tp> makePtr(const A1&... a1) { return std::make_shared<_Tp>(a1...); } #else // cv::Ptr with compatibility workarounds // It should be defined for C-API types only. // C++ types should use regular "delete" operator. template<typename Y> struct DefaultDeleter; #if 0 { void operator()(Y* p) const; }; #endif namespace sfinae { template<typename C, typename Ret, typename... Args> struct has_parenthesis_operator { private: template<typename T> static CV_CONSTEXPR std::true_type check(typename std::is_same<typename std::decay<decltype(std::declval<T>().operator()(std::declval<Args>()...))>::type, Ret>::type*); template<typename> static CV_CONSTEXPR std::false_type check(...); typedef decltype(check<C>(0)) type; public: static CV_CONSTEXPR bool value = type::value; }; } // namespace sfinae template <typename T, typename = void> struct has_custom_delete : public std::false_type {}; template <typename T> struct has_custom_delete<T, typename std::enable_if< sfinae::has_parenthesis_operator<DefaultDeleter<T>, void, T*>::value >::type > : public std::true_type {}; template<typename T> struct Ptr : public std::shared_ptr<T> { #if 0 using std::shared_ptr<T>::shared_ptr; // GCC 5.x can't handle this #else inline Ptr() CV_NOEXCEPT : std::shared_ptr<T>() {} inline Ptr(nullptr_t) CV_NOEXCEPT : std::shared_ptr<T>(nullptr) {} template<typename Y, typename D> inline Ptr(Y* p, D d) : std::shared_ptr<T>(p, d) {} template<typename D> inline Ptr(nullptr_t, D d) : std::shared_ptr<T>(nullptr, d) {} template<typename Y> inline Ptr(const Ptr<Y>& r, T* ptr) CV_NOEXCEPT : std::shared_ptr<T>(r, ptr) {} inline Ptr(const Ptr<T>& o) CV_NOEXCEPT : std::shared_ptr<T>(o) {} inline Ptr(Ptr<T>&& o) CV_NOEXCEPT : std::shared_ptr<T>(std::move(o)) {} template<typename Y> inline Ptr(const Ptr<Y>& o) CV_NOEXCEPT : std::shared_ptr<T>(o) {} template<typename Y> inline Ptr(Ptr<Y>&& o) CV_NOEXCEPT : std::shared_ptr<T>(std::move(o)) {} #endif inline Ptr(const std::shared_ptr<T>& o) CV_NOEXCEPT : std::shared_ptr<T>(o) {} inline Ptr(std::shared_ptr<T>&& o) CV_NOEXCEPT : std::shared_ptr<T>(std::move(o)) {} // Overload with custom DefaultDeleter: Ptr<IplImage>(...) template<typename Y> inline Ptr(const std::true_type&, Y* ptr) : std::shared_ptr<T>(ptr, DefaultDeleter<Y>()) {} // Overload without custom deleter: Ptr<std::string>(...); template<typename Y> inline Ptr(const std::false_type&, Y* ptr) : std::shared_ptr<T>(ptr) {} template<typename Y = T> inline Ptr(Y* ptr) : Ptr(has_custom_delete<Y>(), ptr) {} // Overload with custom DefaultDeleter: Ptr<IplImage>(...) template<typename Y> inline void reset(const std::true_type&, Y* ptr) { std::shared_ptr<T>::reset(ptr, DefaultDeleter<Y>()); } // Overload without custom deleter: Ptr<std::string>(...); template<typename Y> inline void reset(const std::false_type&, Y* ptr) { std::shared_ptr<T>::reset(ptr); } template<typename Y> inline void reset(Y* ptr) { Ptr<T>::reset(has_custom_delete<Y>(), ptr); } template<class Y, class Deleter> void reset(Y* ptr, Deleter d) { std::shared_ptr<T>::reset(ptr, d); } void reset() CV_NOEXCEPT { std::shared_ptr<T>::reset(); } Ptr& operator=(const Ptr& o) { std::shared_ptr<T>::operator =(o); return *this; } template<typename Y> inline Ptr& operator=(const Ptr<Y>& o) { std::shared_ptr<T>::operator =(o); return *this; } T* operator->() const CV_NOEXCEPT { return std::shared_ptr<T>::get();} typename std::add_lvalue_reference<T>::type operator*() const CV_NOEXCEPT { return *std::shared_ptr<T>::get(); } // OpenCV 3.x methods (not a part of standart C++ library) inline void release() { std::shared_ptr<T>::reset(); } inline operator T* () const { return std::shared_ptr<T>::get(); } inline bool empty() const { return std::shared_ptr<T>::get() == nullptr; } template<typename Y> inline Ptr<Y> staticCast() const CV_NOEXCEPT { return std::static_pointer_cast<Y>(*this); } template<typename Y> inline Ptr<Y> constCast() const CV_NOEXCEPT { return std::const_pointer_cast<Y>(*this); } template<typename Y> inline Ptr<Y> dynamicCast() const CV_NOEXCEPT { return std::dynamic_pointer_cast<Y>(*this); } }; template<typename _Tp, typename ... A1> static inline Ptr<_Tp> makePtr(const A1&... a1) { static_assert( !has_custom_delete<_Tp>::value, "Can't use this makePtr with custom DefaultDeleter"); return (Ptr<_Tp>)std::make_shared<_Tp>(a1...); } #endif // CV_DOXYGEN //! @} core_basic } // cv #endif //OPENCV_CORE_CVSTD_WRAPPER_HPP ``` the code at line 45 is ``` static CV_CONSTEXPR std::true_type check(typename std::is_same<typename std::decay<decltype(std::declval<T>().operator()(std::declval<Args>()...))>::type, Ret>::type*); ```
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