/usr/include/armadillo_bits/operator_plus.hpp is in libarmadillo-dev 1:4.200.0+dfsg-1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
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// Copyright (C) 2008-2012 NICTA (www.nicta.com.au)
// Copyright (C) 2012 Ryan Curtin
//
// This Source Code Form is subject to the terms of the Mozilla Public
// License, v. 2.0. If a copy of the MPL was not distributed with this
// file, You can obtain one at http://mozilla.org/MPL/2.0/.
//! \addtogroup operator_plus
//! @{
//! unary plus operation (does nothing, but is required for completeness)
template<typename T1>
arma_inline
typename enable_if2< is_arma_type<T1>::value, const T1& >::result
operator+
(const T1& X)
{
arma_extra_debug_sigprint();
return X;
}
//! Base + scalar
template<typename T1>
arma_inline
typename enable_if2< is_arma_type<T1>::value, const eOp<T1, eop_scalar_plus> >::result
operator+
(const T1& X, const typename T1::elem_type k)
{
arma_extra_debug_sigprint();
return eOp<T1, eop_scalar_plus>(X, k);
}
//! scalar + Base
template<typename T1>
arma_inline
typename enable_if2< is_arma_type<T1>::value, const eOp<T1, eop_scalar_plus> >::result
operator+
(const typename T1::elem_type k, const T1& X)
{
arma_extra_debug_sigprint();
return eOp<T1, eop_scalar_plus>(X, k); // NOTE: order is swapped
}
//! non-complex Base + complex scalar
template<typename T1>
arma_inline
typename
enable_if2
<
(is_arma_type<T1>::value && is_cx<typename T1::elem_type>::no),
const mtOp<typename std::complex<typename T1::pod_type>, T1, op_cx_scalar_plus>
>::result
operator+
(
const T1& X,
const std::complex<typename T1::pod_type>& k
)
{
arma_extra_debug_sigprint();
return mtOp<typename std::complex<typename T1::pod_type>, T1, op_cx_scalar_plus>('j', X, k);
}
//! complex scalar + non-complex Base
template<typename T1>
arma_inline
typename
enable_if2
<
(is_arma_type<T1>::value && is_cx<typename T1::elem_type>::no),
const mtOp<typename std::complex<typename T1::pod_type>, T1, op_cx_scalar_plus>
>::result
operator+
(
const std::complex<typename T1::pod_type>& k,
const T1& X
)
{
arma_extra_debug_sigprint();
return mtOp<typename std::complex<typename T1::pod_type>, T1, op_cx_scalar_plus>('j', X, k); // NOTE: order is swapped
}
//! addition of user-accessible Armadillo objects with same element type
template<typename T1, typename T2>
arma_inline
typename
enable_if2
<
is_arma_type<T1>::value && is_arma_type<T2>::value && is_same_type<typename T1::elem_type, typename T2::elem_type>::value,
const eGlue<T1, T2, eglue_plus>
>::result
operator+
(
const T1& X,
const T2& Y
)
{
arma_extra_debug_sigprint();
return eGlue<T1, T2, eglue_plus>(X, Y);
}
//! addition of user-accessible Armadillo objects with different element types
template<typename T1, typename T2>
inline
typename
enable_if2
<
(is_arma_type<T1>::value && is_arma_type<T2>::value && (is_same_type<typename T1::elem_type, typename T2::elem_type>::no)),
const mtGlue<typename promote_type<typename T1::elem_type, typename T2::elem_type>::result, T1, T2, glue_mixed_plus>
>::result
operator+
(
const T1& X,
const T2& Y
)
{
arma_extra_debug_sigprint();
typedef typename T1::elem_type eT1;
typedef typename T2::elem_type eT2;
typedef typename promote_type<eT1,eT2>::result out_eT;
promote_type<eT1,eT2>::check();
return mtGlue<out_eT, T1, T2, glue_mixed_plus>( X, Y );
}
//! addition of two sparse objects
template<typename T1, typename T2>
inline
arma_hot
typename
enable_if2
<
(is_arma_sparse_type<T1>::value && is_arma_sparse_type<T2>::value && is_same_type<typename T1::elem_type, typename T2::elem_type>::value),
SpGlue<T1,T2,spglue_plus>
>::result
operator+
(
const T1& x,
const T2& y
)
{
arma_extra_debug_sigprint();
return SpGlue<T1,T2,spglue_plus>(x, y);
}
//! addition of sparse and non-sparse object
template<typename T1, typename T2>
inline
typename
enable_if2
<
(is_arma_type<T1>::value && is_arma_sparse_type<T2>::value && is_same_type<typename T1::elem_type, typename T2::elem_type>::value),
Mat<typename T1::elem_type>
>::result
operator+
(
const T1& x,
const T2& y
)
{
arma_extra_debug_sigprint();
Mat<typename T1::elem_type> result(x);
const SpProxy<T2> pb(y);
arma_debug_assert_same_size( result.n_rows, result.n_cols, pb.get_n_rows(), pb.get_n_cols(), "addition" );
typename SpProxy<T2>::const_iterator_type it = pb.begin();
typename SpProxy<T2>::const_iterator_type it_end = pb.end();
while(it != it_end)
{
result.at(it.row(), it.col()) += (*it);
++it;
}
return result;
}
//! addition of sparse and non-sparse object
template<typename T1, typename T2>
inline
typename
enable_if2
<
(is_arma_sparse_type<T1>::value && is_arma_type<T2>::value && is_same_type<typename T1::elem_type, typename T2::elem_type>::value),
Mat<typename T1::elem_type>
>::result
operator+
(
const T1& x,
const T2& y
)
{
arma_extra_debug_sigprint();
// Just call the other order (these operations are commutative)
return (y + x);
}
//! @}
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