40 lines
1.1 KiB
C++
40 lines
1.1 KiB
C++
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// Copyright (c) 2011 John Maddock
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// Use, modification and distribution are subject to the
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// Boost Software License, Version 1.0. (See accompanying file
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// LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
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#ifndef BOOST_MP_BIG_LANCZOS
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#define BOOST_MP_BIG_LANCZOS
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#include <boost/math/bindings/detail/big_lanczos.hpp>
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namespace boost{ namespace math{
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namespace lanczos{
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template <class T, class Policy>
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struct lanczos;
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template<class Backend, boost::multiprecision::expression_template_option ExpressionTemplates, class Policy>
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struct lanczos<multiprecision::number<Backend, ExpressionTemplates>, Policy>
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{
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typedef typename boost::math::policies::precision<multiprecision::number<Backend, ExpressionTemplates>, Policy>::type precision_type;
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typedef typename mpl::if_c<
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precision_type::value && (precision_type::value <= 73),
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lanczos13UDT,
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typename mpl::if_c<
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precision_type::value&& (precision_type::value <= 122),
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lanczos22UDT,
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undefined_lanczos
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>::type
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>::type type;
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};
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} // namespace lanczos
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}} // namespaces
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#endif
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