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Diffstat (limited to 'src/armadillo/include/armadillo_bits/fill.hpp')
| -rw-r--r-- | src/armadillo/include/armadillo_bits/fill.hpp | 116 |
1 files changed, 116 insertions, 0 deletions
diff --git a/src/armadillo/include/armadillo_bits/fill.hpp b/src/armadillo/include/armadillo_bits/fill.hpp new file mode 100644 index 0000000..8b41097 --- /dev/null +++ b/src/armadillo/include/armadillo_bits/fill.hpp @@ -0,0 +1,116 @@ +// SPDX-License-Identifier: Apache-2.0 +// +// Copyright 2008-2016 Conrad Sanderson (http://conradsanderson.id.au) +// Copyright 2008-2016 National ICT Australia (NICTA) +// +// Licensed under the Apache License, Version 2.0 (the "License"); +// you may not use this file except in compliance with the License. +// You may obtain a copy of the License at +// http://www.apache.org/licenses/LICENSE-2.0 +// +// Unless required by applicable law or agreed to in writing, software +// distributed under the License is distributed on an "AS IS" BASIS, +// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. +// See the License for the specific language governing permissions and +// limitations under the License. +// ------------------------------------------------------------------------ + + +//! \addtogroup fill +//! @{ + + +namespace fill + { + struct fill_none {}; + struct fill_zeros {}; + struct fill_ones {}; + struct fill_eye {}; + struct fill_randu {}; + struct fill_randn {}; + + template<typename fill_type> + struct fill_class { inline constexpr fill_class() {} }; + + static constexpr fill_class<fill_none > none; + static constexpr fill_class<fill_zeros> zeros; + static constexpr fill_class<fill_ones > ones; + static constexpr fill_class<fill_eye > eye; + static constexpr fill_class<fill_randu> randu; + static constexpr fill_class<fill_randn> randn; + + // + + template<typename from_type, typename to_type> + struct allow_conversion + { + static constexpr bool value = true; + }; + + template<> struct allow_conversion<std::complex<double>, double> { static constexpr bool value = false; }; + template<> struct allow_conversion<std::complex<double>, float > { static constexpr bool value = false; }; + template<> struct allow_conversion<std::complex<double>, u64 > { static constexpr bool value = false; }; + template<> struct allow_conversion<std::complex<double>, s64 > { static constexpr bool value = false; }; + template<> struct allow_conversion<std::complex<double>, u32 > { static constexpr bool value = false; }; + template<> struct allow_conversion<std::complex<double>, s32 > { static constexpr bool value = false; }; + template<> struct allow_conversion<std::complex<double>, u16 > { static constexpr bool value = false; }; + template<> struct allow_conversion<std::complex<double>, s16 > { static constexpr bool value = false; }; + template<> struct allow_conversion<std::complex<double>, u8 > { static constexpr bool value = false; }; + template<> struct allow_conversion<std::complex<double>, s8 > { static constexpr bool value = false; }; + + template<> struct allow_conversion<std::complex<float>, double> { static constexpr bool value = false; }; + template<> struct allow_conversion<std::complex<float>, float > { static constexpr bool value = false; }; + template<> struct allow_conversion<std::complex<float>, u64 > { static constexpr bool value = false; }; + template<> struct allow_conversion<std::complex<float>, s64 > { static constexpr bool value = false; }; + template<> struct allow_conversion<std::complex<float>, u32 > { static constexpr bool value = false; }; + template<> struct allow_conversion<std::complex<float>, s32 > { static constexpr bool value = false; }; + template<> struct allow_conversion<std::complex<float>, u16 > { static constexpr bool value = false; }; + template<> struct allow_conversion<std::complex<float>, s16 > { static constexpr bool value = false; }; + template<> struct allow_conversion<std::complex<float>, u8 > { static constexpr bool value = false; }; + template<> struct allow_conversion<std::complex<float>, s8 > { static constexpr bool value = false; }; + + // + + template<typename eT> inline bool isfinite_wrapper(eT ) { return true; } + template<> inline bool isfinite_wrapper(float x) { return std::isfinite(x); } + template<> inline bool isfinite_wrapper(double x) { return std::isfinite(x); } + template<typename T> inline bool isfinite_wrapper(std::complex<T>& x) { return std::isfinite(x.real()) && std::isfinite(x.imag()); } + + // + + template<typename scalar_type1> + struct scalar_holder + { + const scalar_type1 scalar; + + inline explicit scalar_holder(const scalar_type1& in_scalar) : scalar(in_scalar) {} + + inline scalar_holder() = delete; + + template + < + typename scalar_type2, + typename arma::enable_if2<allow_conversion<scalar_type1, scalar_type2>::value, int>::result = 0 + > + inline + operator scalar_holder<scalar_type2>() const + { + const bool ok_conversion = (std::is_integral<scalar_type2>::value && std::is_floating_point<scalar_type1>::value) ? isfinite_wrapper(scalar) : true; + + return scalar_holder<scalar_type2>( ok_conversion ? scalar_type2(scalar) : scalar_type2(0) ); + } + }; + + // + + template<typename scalar_type> + inline + typename enable_if2< is_supported_elem_type<scalar_type>::value, scalar_holder<scalar_type> >::result + value(const scalar_type& in_scalar) + { + return scalar_holder<scalar_type>(in_scalar); + } + } + + +//! @} |