diff options
author | Gael Guennebaud <g.gael@free.fr> | 2019-10-10 17:41:47 +0200 |
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committer | Gael Guennebaud <g.gael@free.fr> | 2019-10-10 17:41:47 +0200 |
commit | e7d8ba747c7b161eff59959d4d2a5acf788ee00e (patch) | |
tree | 93173c2dd314cc541c34148419126a2bf31b678a | |
parent | fb557aec5c1e4d75ef9293952dbfb03bbb357d6d (diff) |
bug #1752: make is_convertible equivalent to the std c++11 equivalent and fallback to std::is_convertible when c++11 is enabled.
-rwxr-xr-x | Eigen/src/Core/util/Meta.h | 13 | ||||
-rw-r--r-- | test/meta.cpp | 8 |
2 files changed, 19 insertions, 2 deletions
diff --git a/Eigen/src/Core/util/Meta.h b/Eigen/src/Core/util/Meta.h index db948cea1..fe9550d71 100755 --- a/Eigen/src/Core/util/Meta.h +++ b/Eigen/src/Core/util/Meta.h @@ -174,6 +174,11 @@ template<typename T> struct add_const_on_value_type<T*> { typedef T const template<typename T> struct add_const_on_value_type<T* const> { typedef T const* const type; }; template<typename T> struct add_const_on_value_type<T const* const> { typedef T const* const type; }; +#if EIGEN_HAS_CXX11 + +using std::is_convertible; + +#else template<typename From, typename To> struct is_convertible_impl @@ -211,6 +216,14 @@ struct is_convertible enum { value = is_convertible_impl<From,To>::value }; }; +template<typename T> +struct is_convertible<T,T&> { enum { value = false }; }; + +template<typename T> +struct is_convertible<const T,const T&> { enum { value = true }; }; + +#endif + /** \internal Allows to enable/disable an overload * according to a compile time condition. */ diff --git a/test/meta.cpp b/test/meta.cpp index 51395acd0..b432d9316 100644 --- a/test/meta.cpp +++ b/test/meta.cpp @@ -87,8 +87,12 @@ EIGEN_DECLARE_TEST(meta) STATIC_CHECK(( internal::is_convertible<const Matrix3f&,const Matrix3f&>::value )); STATIC_CHECK((!internal::is_convertible<const Matrix3f&,Matrix3f&>::value )); STATIC_CHECK((!internal::is_convertible<const Matrix3f,Matrix3f&>::value )); - STATIC_CHECK(( internal::is_convertible<Matrix3f,Matrix3f&>::value )); // std::is_convertible returns false here though Matrix3f from; Matrix3f& to = from; is valid. - //STATIC_CHECK((!internal::is_convertible<Matrix3f,Matrix3d>::value )); //does not work because the conversion is prevented by a static assertion + STATIC_CHECK(!( internal::is_convertible<Matrix3f,Matrix3f&>::value )); + + STATIC_CHECK(!( internal::is_convertible<int,int&>::value )); + STATIC_CHECK(( internal::is_convertible<const int,const int& >::value )); + + //STATIC_CHECK((!internal::is_convertible<Matrix3f,Matrix3d>::value )); //does not even compile because the conversion is prevented by a static assertion STATIC_CHECK((!internal::is_convertible<Array33f,int>::value )); STATIC_CHECK((!internal::is_convertible<MatrixXf,float>::value )); { |