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Diffstat (limited to 'src/third_party/boost/boost/numeric/conversion/detail/is_subranged.hpp')
-rw-r--r-- | src/third_party/boost/boost/numeric/conversion/detail/is_subranged.hpp | 234 |
1 files changed, 0 insertions, 234 deletions
diff --git a/src/third_party/boost/boost/numeric/conversion/detail/is_subranged.hpp b/src/third_party/boost/boost/numeric/conversion/detail/is_subranged.hpp deleted file mode 100644 index b5e7fe8f1e8..00000000000 --- a/src/third_party/boost/boost/numeric/conversion/detail/is_subranged.hpp +++ /dev/null @@ -1,234 +0,0 @@ -// (c) Copyright Fernando Luis Cacciola Carballal 2000-2004 -// Use, modification, and distribution is subject to the Boost Software -// License, Version 1.0. (See accompanying file LICENSE_1_0.txt or copy at -// http://www.boost.org/LICENSE_1_0.txt) - -// See library home page at http://www.boost.org/libs/numeric/conversion -// -// Contact the author at: fernando_cacciola@hotmail.com -// -#ifndef BOOST_NUMERIC_CONVERSION_DETAIL_IS_SUBRANGED_FLC_12NOV2002_HPP -#define BOOST_NUMERIC_CONVERSION_DETAIL_IS_SUBRANGED_FLC_12NOV2002_HPP - -#include "boost/config.hpp" -#include "boost/limits.hpp" - -#include "boost/mpl/int.hpp" -#include "boost/mpl/multiplies.hpp" -#include "boost/mpl/less.hpp" -#include "boost/mpl/equal_to.hpp" - -#include "boost/type_traits/is_same.hpp" - -#include "boost/numeric/conversion/detail/meta.hpp" -#include "boost/numeric/conversion/detail/int_float_mixture.hpp" -#include "boost/numeric/conversion/detail/sign_mixture.hpp" -#include "boost/numeric/conversion/detail/udt_builtin_mixture.hpp" - -namespace boost { namespace numeric { namespace convdetail -{ - //--------------------------------------------------------------- - // Implementations of the compile time predicate "T is subranged" - //--------------------------------------------------------------- - - // for integral to integral conversions - template<class T,class S> - struct subranged_Sig2Unsig - { - // Signed to unsigned conversions are 'subranged' because of possible loose - // of negative values. - typedef mpl::true_ type ; - } ; - - // for unsigned integral to signed integral conversions - template<class T,class S> - struct subranged_Unsig2Sig - { - // IMPORTANT NOTE: - // - // This code assumes that signed/unsigned integral values are represented - // such that: - // - // numeric_limits<signed T>::digits + 1 == numeric_limits<unsigned T>::digits - // - // The '+1' is required since numeric_limits<>::digits gives 1 bit less for signed integral types. - // - // This fact is used by the following logic: - // - // if ( (numeric_limits<T>::digits+1) < (2*numeric_limits<S>::digits) ) - // then the conversion is subranged. - // - - typedef mpl::int_< ::std::numeric_limits<S>::digits > S_digits ; - typedef mpl::int_< ::std::numeric_limits<T>::digits > T_digits ; - - // T is signed, so take digits+1 - typedef typename T_digits::next u_T_digits ; - - typedef mpl::int_<2> Two ; - - typedef typename mpl::multiplies<S_digits,Two>::type S_digits_times_2 ; - - typedef typename mpl::less<u_T_digits,S_digits_times_2>::type type ; - } ; - - // for integral to integral conversions of the same sign. - template<class T,class S> - struct subranged_SameSign - { - // An integral conversion of the same sign is subranged if digits(T) < digits(S). - - typedef mpl::int_< ::std::numeric_limits<S>::digits > S_digits ; - typedef mpl::int_< ::std::numeric_limits<T>::digits > T_digits ; - - typedef typename mpl::less<T_digits,S_digits>::type type ; - } ; - - // for integral to float conversions - template<class T,class S> - struct subranged_Int2Float - { - typedef mpl::false_ type ; - } ; - - // for float to integral conversions - template<class T,class S> - struct subranged_Float2Int - { - typedef mpl::true_ type ; - } ; - - // for float to float conversions - template<class T,class S> - struct subranged_Float2Float - { - // If both T and S are floats, - // compare exponent bits and if they match, mantisa bits. - - typedef mpl::int_< ::std::numeric_limits<S>::digits > S_mantisa ; - typedef mpl::int_< ::std::numeric_limits<T>::digits > T_mantisa ; - - typedef mpl::int_< ::std::numeric_limits<S>::max_exponent > S_exponent ; - typedef mpl::int_< ::std::numeric_limits<T>::max_exponent > T_exponent ; - - typedef typename mpl::less<T_exponent,S_exponent>::type T_smaller_exponent ; - - typedef typename mpl::equal_to<T_exponent,S_exponent>::type equal_exponents ; - - typedef mpl::less<T_mantisa,S_mantisa> T_smaller_mantisa ; - - typedef mpl::eval_if<equal_exponents,T_smaller_mantisa,mpl::false_> not_bigger_exponent_case ; - - typedef typename - mpl::eval_if<T_smaller_exponent,mpl::true_,not_bigger_exponent_case>::type - type ; - } ; - - // for Udt to built-in conversions - template<class T,class S> - struct subranged_Udt2BuiltIn - { - typedef mpl::true_ type ; - } ; - - // for built-in to Udt conversions - template<class T,class S> - struct subranged_BuiltIn2Udt - { - typedef mpl::false_ type ; - } ; - - // for Udt to Udt conversions - template<class T,class S> - struct subranged_Udt2Udt - { - typedef mpl::false_ type ; - } ; - - //------------------------------------------------------------------- - // Selectors for the implementations of the subranged predicate - //------------------------------------------------------------------- - - template<class T,class S> - struct get_subranged_Int2Int - { - typedef subranged_SameSign<T,S> Sig2Sig ; - typedef subranged_Sig2Unsig<T,S> Sig2Unsig ; - typedef subranged_Unsig2Sig<T,S> Unsig2Sig ; - typedef Sig2Sig Unsig2Unsig ; - - typedef typename get_sign_mixture<T,S>::type sign_mixture ; - - typedef typename - for_sign_mixture<sign_mixture, Sig2Sig, Sig2Unsig, Unsig2Sig, Unsig2Unsig>::type - type ; - } ; - - template<class T,class S> - struct get_subranged_BuiltIn2BuiltIn - { - typedef get_subranged_Int2Int<T,S> Int2IntQ ; - - typedef subranged_Int2Float <T,S> Int2Float ; - typedef subranged_Float2Int <T,S> Float2Int ; - typedef subranged_Float2Float<T,S> Float2Float ; - - typedef mpl::identity<Int2Float > Int2FloatQ ; - typedef mpl::identity<Float2Int > Float2IntQ ; - typedef mpl::identity<Float2Float> Float2FloatQ ; - - typedef typename get_int_float_mixture<T,S>::type int_float_mixture ; - - typedef for_int_float_mixture<int_float_mixture, Int2IntQ, Int2FloatQ, Float2IntQ, Float2FloatQ> for_ ; - - typedef typename for_::type selected ; - - typedef typename selected::type type ; - } ; - - template<class T,class S> - struct get_subranged - { - typedef get_subranged_BuiltIn2BuiltIn<T,S> BuiltIn2BuiltInQ ; - - typedef subranged_BuiltIn2Udt<T,S> BuiltIn2Udt ; - typedef subranged_Udt2BuiltIn<T,S> Udt2BuiltIn ; - typedef subranged_Udt2Udt<T,S> Udt2Udt ; - - typedef mpl::identity<BuiltIn2Udt> BuiltIn2UdtQ ; - typedef mpl::identity<Udt2BuiltIn> Udt2BuiltInQ ; - typedef mpl::identity<Udt2Udt > Udt2UdtQ ; - - typedef typename get_udt_builtin_mixture<T,S>::type udt_builtin_mixture ; - - typedef typename - for_udt_builtin_mixture<udt_builtin_mixture, BuiltIn2BuiltInQ, BuiltIn2UdtQ, Udt2BuiltInQ, Udt2UdtQ>::type - selected ; - - typedef typename selected::type selected2 ; - - typedef typename selected2::type type ; - } ; - - - //------------------------------------------------------------------- - // Top level implementation selector. - //------------------------------------------------------------------- - template<class T, class S> - struct get_is_subranged - { - typedef get_subranged<T,S> non_trivial_case ; - typedef mpl::identity<mpl::false_> trivial_case ; - - typedef is_same<T,S> is_trivial ; - - typedef typename mpl::if_<is_trivial,trivial_case,non_trivial_case>::type selected ; - - typedef typename selected::type type ; - } ; - -} } } // namespace boost::numeric::convdetail - -#endif - - |