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Move helper traits classes out of Quantity.hh
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,51 @@ | ||
| //----------------------------------*-C++-*----------------------------------// | ||
| // Copyright 2024 UT-Battelle, LLC, and other Celeritas developers. | ||
| // See the top-level COPYRIGHT file for details. | ||
| // SPDX-License-Identifier: (Apache-2.0 OR MIT) | ||
| //---------------------------------------------------------------------------// | ||
| //! \file corecel/math/UnitUtils.hh | ||
| //! \brief Helpers for unit trait classes | ||
| //---------------------------------------------------------------------------// | ||
| #pragma once | ||
|
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| #include "corecel/Macros.hh" | ||
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| namespace celeritas | ||
| { | ||
| //---------------------------------------------------------------------------// | ||
| //! Value is 1 / C1::value() | ||
| template<class C1> | ||
| struct UnitInverse | ||
| { | ||
| //! Get the conversion factor of the resulting unit | ||
| static CELER_CONSTEXPR_FUNCTION auto value() noexcept -> decltype(auto) | ||
| { | ||
| return 1 / C1::value(); | ||
| } | ||
| }; | ||
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| //---------------------------------------------------------------------------// | ||
| //! Value is C1::value() / C2::value() | ||
| template<class C1, class C2> | ||
| struct UnitDivide | ||
| { | ||
| //! Get the conversion factor of the resulting unit | ||
| static CELER_CONSTEXPR_FUNCTION auto value() noexcept -> decltype(auto) | ||
| { | ||
| return C1::value() / C2::value(); | ||
| } | ||
| }; | ||
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| //! Value is C1::value() * C2::value() | ||
| template<class C1, class C2> | ||
| struct UnitProduct | ||
| { | ||
| //! Get the conversion factor of the resulting unit | ||
| static CELER_CONSTEXPR_FUNCTION auto value() noexcept -> decltype(auto) | ||
| { | ||
| return C1::value() * C2::value(); | ||
| } | ||
| }; | ||
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| //---------------------------------------------------------------------------// | ||
| } // namespace celeritas |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,73 @@ | ||
| //----------------------------------*-C++-*----------------------------------// | ||
| // Copyright 2024 UT-Battelle, LLC, and other Celeritas developers. | ||
| // See the top-level COPYRIGHT file for details. | ||
| // SPDX-License-Identifier: (Apache-2.0 OR MIT) | ||
| //---------------------------------------------------------------------------// | ||
| //! \file corecel/math/detail/QuantityImpl.hh | ||
| //---------------------------------------------------------------------------// | ||
| #pragma once | ||
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| #include "corecel/Macros.hh" | ||
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| #include "NumericLimits.hh" | ||
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| namespace celeritas | ||
| { | ||
| namespace detail | ||
| { | ||
| //---------------------------------------------------------------------------// | ||
| //! Helper tag for special unitless values | ||
| enum class QConstant | ||
| { | ||
| neg_max = -1, | ||
| zero = 0, | ||
| max = 1 | ||
| }; | ||
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| //! Convert unitless values into a particular type | ||
| template<class T> | ||
| CELER_CONSTEXPR_FUNCTION T get_constant(QConstant qc) | ||
| { | ||
| if constexpr (std::is_floating_point_v<T>) | ||
| { | ||
| // Return +/- infinity | ||
| return qc == QConstant::neg_max ? -numeric_limits<T>::infinity() | ||
| : qc == QConstant::max ? numeric_limits<T>::infinity() | ||
| : 0; | ||
| } | ||
| else | ||
| { | ||
| // Return lowest and highest values | ||
| return qc == QConstant::neg_max ? numeric_limits<T>::lowest() | ||
| : qc == QConstant::max ? numeric_limits<T>::max() | ||
| : 0; | ||
| } | ||
| } | ||
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| //! Tag class for creating a nonnumeric value comparable to Quantity. | ||
| template<QConstant QC> | ||
| struct UnitlessQuantity | ||
| { | ||
| }; | ||
|
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| //! Helper class for getting attributes about a member function | ||
| template<class T> | ||
| struct AccessorTraits; | ||
|
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| //! \cond | ||
| //! Access the return type using AccessorTraits<decltype(&Foo::bar)> | ||
| template<class ResultType, class ClassType> | ||
| struct AccessorTraits<ResultType (ClassType::*)() const> | ||
| { | ||
| using type = ClassType; | ||
| using result_type = ResultType; | ||
| }; | ||
| //! \endcond | ||
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| //! Get the result type of a class accessor | ||
| template<class T> | ||
| using AccessorResultType = typename AccessorTraits<T>::result_type; | ||
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| //---------------------------------------------------------------------------// | ||
| } // namespace detail | ||
| } // namespace celeritas |