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Make is_same_dense compatible with different scalar types.

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This commit is contained in:
Gael Guennebaud 2018-07-03 13:21:43 +02:00
parent 67ec37f7b0
commit 3ae2083e23
2 changed files with 15 additions and 2 deletions
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9
Eigen/src/Core/util/XprHelper.h
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@ -680,13 +680,18 @@ template<typename S1, typename S2> struct glue_shapes;
template<> struct glue_shapes<DenseShape,TriangularShape> { typedef TriangularShape type; };
template<typename T1, typename T2>
bool is_same_dense(const T1 &mat1, const T2 &mat2, typename enable_if<has_direct_access<T1>::ret&&has_direct_access<T2>::ret, T1>::type * = 0)
struct possibly_same_dense {
enum { value = has_direct_access<T1>::ret && has_direct_access<T2>::ret && is_same<typename T1::Scalar,typename T2::Scalar>::value };
};
template<typename T1, typename T2>
bool is_same_dense(const T1 &mat1, const T2 &mat2, typename enable_if<possibly_same_dense<T1,T2>::value>::type * = 0)
{
return (mat1.data()==mat2.data()) && (mat1.innerStride()==mat2.innerStride()) && (mat1.outerStride()==mat2.outerStride());
}
template<typename T1, typename T2>
bool is_same_dense(const T1 &, const T2 &, typename enable_if<!(has_direct_access<T1>::ret&&has_direct_access<T2>::ret), T1>::type * = 0)
bool is_same_dense(const T1 &, const T2 &, typename enable_if<!possibly_same_dense<T1,T2>::value>::type * = 0)
{
return false;
}

8
test/is_same_dense.cpp
View File

@ -14,9 +14,13 @@ using internal::is_same_dense;
void test_is_same_dense()
{
typedef Matrix<double,Dynamic,Dynamic,ColMajor> ColMatrixXd;
typedef Matrix<std::complex<double>,Dynamic,Dynamic,ColMajor> ColMatrixXcd;
ColMatrixXd m1(10,10);
ColMatrixXcd m2(10,10);
Ref<ColMatrixXd> ref_m1(m1);
Ref<ColMatrixXd,0, Stride<Dynamic,Dynamic> > ref_m2_real(m2.real());
Ref<const ColMatrixXd> const_ref_m1(m1);
VERIFY(is_same_dense(m1,m1));
VERIFY(is_same_dense(m1,ref_m1));
VERIFY(is_same_dense(const_ref_m1,m1));
@ -30,4 +34,8 @@ void test_is_same_dense()
Ref<const ColMatrixXd> const_ref_m1_col(m1.col(1));
VERIFY(is_same_dense(m1.col(1),const_ref_m1_col));
VERIFY(!is_same_dense(m1, ref_m2_real));
VERIFY(!is_same_dense(m2, ref_m2_real));
}