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Added ability to get the nth element from an abstract array type.

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This commit is contained in:
Benoit Steiner 2014-08-13 08:44:47 -07:00
parent f1d8c13dbc
commit 916ef48846
1 changed files with 11 additions and 2 deletions
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13
unsupported/Eigen/CXX11/src/Core/util/EmulateCXX11Meta.h
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@ -181,6 +181,15 @@ array<t, n> repeat(t v) {
return array; return array;
} }
template<std::size_t I, class Head, class Tail>
EIGEN_DEVICE_FUNC EIGEN_STRONG_INLINE typename Head::type array_get(type_list<Head, Tail>& a) {
return get<I, type_list<Head, Tail> >::value;
}
template<std::size_t I, class Head, class Tail>
EIGEN_DEVICE_FUNC EIGEN_STRONG_INLINE typename Head::type array_get(const type_list<Head, Tail>& a) {
return get<I, type_list<Head, Tail> >::value;
}
template<std::size_t n, typename t> template<std::size_t n, typename t>
EIGEN_DEVICE_FUNC EIGEN_STRONG_INLINE t array_prod(const array<t, n>& a) { EIGEN_DEVICE_FUNC EIGEN_STRONG_INLINE t array_prod(const array<t, n>& a) {
t prod = 1; t prod = 1;
@ -196,8 +205,8 @@ template<std::size_t I, class T, std::size_t N>
EIGEN_DEVICE_FUNC EIGEN_STRONG_INLINE T& array_get(array<T,N>& a) { EIGEN_DEVICE_FUNC EIGEN_STRONG_INLINE T& array_get(array<T,N>& a) {
return a[I]; return a[I];
} }
template<std::size_t I, class T, std::size_t N> EIGEN_DEVICE_FUNC EIGEN_STRONG_INLINE template<std::size_t I, class T, std::size_t N>
const T& array_get(const array<T,N>& a) { EIGEN_DEVICE_FUNC EIGEN_STRONG_INLINE const T& array_get(const array<T,N>& a) {
return a[I]; return a[I];
} }