46 lines
2.1 KiB
C++
46 lines
2.1 KiB
C++
// SPDX-License-Identifier: Apache-2.0
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//
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// Copyright 2008-2016 Conrad Sanderson (http://conradsanderson.id.au)
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// Copyright 2008-2016 National ICT Australia (NICTA)
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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// ------------------------------------------------------------------------
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//! \addtogroup access
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//! @{
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class access
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{
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public:
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//! internal function to allow modification of data declared as read-only (use with caution)
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template<typename T1> constexpr static T1& rw (const T1& x) { return const_cast<T1& >(x); }
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template<typename T1> constexpr static T1*& rwp(const T1* const& x) { return const_cast<T1*&>(x); }
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//! internal function to obtain the real part of either a plain number or a complex number
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template<typename eT> constexpr static const eT& tmp_real(const eT& X) { return X; }
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template<typename T> constexpr static const T tmp_real(const std::complex<T>& X) { return X.real(); }
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//! internal function to obtain the imag part of either a plain number or a complex number
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template<typename eT> constexpr static const eT tmp_imag(const eT ) { return eT(0); }
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template<typename T> constexpr static const T tmp_imag(const std::complex<T>& X) { return X.imag(); }
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//! internal function to work around braindead compilers
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template<typename eT> constexpr static const typename enable_if2<is_cx<eT>::no, const eT&>::result alt_conj(const eT& X) { return X; }
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template<typename eT> arma_inline static const typename enable_if2<is_cx<eT>::yes, const eT >::result alt_conj(const eT& X) { return std::conj(X); }
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};
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//! @}
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