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Fix compilation of Vector::operator()(enum) by treating enums as Index

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This commit is contained in:
Gael Guennebaud 2017-09-07 14:34:30 +02:00
parent ea4e65bf41
commit 6d42309f13
4 changed files with 29 additions and 6 deletions
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10
Eigen/src/Core/util/Macros.h
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@ -410,6 +410,16 @@
#endif
#endif
// Does the compiler support type_trais?
#ifndef EIGEN_HAS_TYPE_TRAITS
#if EIGEN_MAX_CPP_VER>=11 && (EIGEN_HAS_CXX11 || __has_feature(is_enum) || EIGEN_COMP_MSVC >= 1700)
#define EIGEN_HAS_TYPE_TRAITS 1
#define EIGEN_INCLUDE_TYPE_TRAITS
#else
#define EIGEN_HAS_TYPE_TRAITS 0
#endif
#endif
// Does the compiler support variadic templates?
#ifndef EIGEN_HAS_VARIADIC_TEMPLATES
#if EIGEN_MAX_CPP_VER>=11 && (__cplusplus > 199711L || EIGEN_COMP_MSVC >= 1900) \

10
Eigen/src/Core/util/XprHelper.h
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@ -34,6 +34,16 @@ inline IndexDest convert_index(const IndexSrc& idx) {
return IndexDest(idx);
}
// true if T can be considered as an integral index (i.e., and integral type or enum)
template<typename T> struct is_valid_index_type
: std::integral_constant<bool,
#if EIGEN_HAS_TYPE_TRAITS
internal::is_integral<T>::value || std::is_enum<T>::value
#else
// without C++11, we use is_convertible to Index instead of is_integral in order to treat enums as Index.
internal::is_convertible<T,Index>::value
#endif
> {};
// promote_scalar_arg is an helper used in operation between an expression and a scalar, like:
// expression * scalar

10
Eigen/src/plugins/IndexedViewMethods.h
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@ -55,9 +55,7 @@ ivcSize(const Indices& indices) const {
template<typename RowIndices, typename ColIndices>
struct valid_indexed_view_overload {
// Here we use is_convertible to Index instead of is_integral in order to treat enums as Index.
// In c++11 we could use is_integral<T> && is_enum<T> if is_convertible appears to be too permissive.
enum { value = !(internal::is_convertible<RowIndices,Index>::value && internal::is_convertible<ColIndices,Index>::value) };
enum { value = !(internal::is_valid_index_type<RowIndices>::value && internal::is_valid_index_type<ColIndices>::value) };
};
public:
@ -146,7 +144,7 @@ operator()(const RowIndicesT (&rowIndices)[RowIndicesN], const ColIndicesT (&col
template<typename Indices>
typename internal::enable_if<
IsRowMajor && (!(internal::get_compile_time_incr<typename IvcType<Indices>::type>::value==1 || internal::is_integral<Indices>::value)),
IsRowMajor && (!(internal::get_compile_time_incr<typename IvcType<Indices>::type>::value==1 || internal::is_valid_index_type<Indices>::value)),
IndexedView<EIGEN_INDEXED_VIEW_METHOD_CONST Derived,IvcIndex,typename IvcType<Indices>::type> >::type
operator()(const Indices& indices) EIGEN_INDEXED_VIEW_METHOD_CONST
{
@ -157,7 +155,7 @@ operator()(const Indices& indices) EIGEN_INDEXED_VIEW_METHOD_CONST
template<typename Indices>
typename internal::enable_if<
(!IsRowMajor) && (!(internal::get_compile_time_incr<typename IvcType<Indices>::type>::value==1 || internal::is_integral<Indices>::value)),
(!IsRowMajor) && (!(internal::get_compile_time_incr<typename IvcType<Indices>::type>::value==1 || internal::is_valid_index_type<Indices>::value)),
IndexedView<EIGEN_INDEXED_VIEW_METHOD_CONST Derived,typename IvcType<Indices>::type,IvcIndex> >::type
operator()(const Indices& indices) EIGEN_INDEXED_VIEW_METHOD_CONST
{
@ -168,7 +166,7 @@ operator()(const Indices& indices) EIGEN_INDEXED_VIEW_METHOD_CONST
template<typename Indices>
typename internal::enable_if<
(internal::get_compile_time_incr<typename IvcType<Indices>::type>::value==1) && (!internal::is_integral<Indices>::value) && (!Symbolic::is_symbolic<Indices>::value),
(internal::get_compile_time_incr<typename IvcType<Indices>::type>::value==1) && (!internal::is_valid_index_type<Indices>::value) && (!Symbolic::is_symbolic<Indices>::value),
VectorBlock<EIGEN_INDEXED_VIEW_METHOD_CONST Derived,internal::array_size<Indices>::value> >::type
operator()(const Indices& indices) EIGEN_INDEXED_VIEW_METHOD_CONST
{

5
test/indexed_view.cpp
View File

@ -366,6 +366,11 @@ void check_indexed_view()
VERIFY( is_same_eq( cA.middleRows<3>(1), cA.middleRows(1,fix<3>)) );
}
// Check compilation of enums as index type:
enum { X=0, Y=1 };
a(X) = 1;
A(X,Y) = 1;
}
void test_indexed_view()