mirror of
https://github.com/OPM/opm-simulators.git
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274 lines
12 KiB
C++
274 lines
12 KiB
C++
// -*- mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*-
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// vi: set et ts=4 sw=4 sts=4:
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/*****************************************************************************
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* See the file COPYING for full copying permissions. *
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* *
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* This program is free software: you can redistribute it and/or modify *
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* it under the terms of the GNU General Public License as published by *
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* the Free Software Foundation, either version 3 of the License, or *
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* (at your option) any later version. *
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* *
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* This program is distributed in the hope that it will be useful, *
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* but WITHOUT ANY WARRANTY; without even the implied warranty of *
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the *
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* GNU General Public License for more details. *
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* *
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* You should have received a copy of the GNU General Public License *
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* along with this program. If not, see <http://www.gnu.org/licenses/>. *
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*****************************************************************************/
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/*!
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* \file
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* \ingroup Properties
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* \ingroup TypeTraits
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* \author Timo Koch
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* \brief The Opm property system, traits with inheritance
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*/
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#ifndef OPM_PROPERTY_SYSTEM_HH
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#define OPM_PROPERTY_SYSTEM_HH
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#include <dune/common/classname.hh>
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#include <cstring>
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#include <ostream>
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#include <tuple>
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#include <type_traits>
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namespace Opm {
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namespace Properties {
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//! a tag to mark properties as undefined
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struct UndefinedProperty {};
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template <class TypeTag, class MyTypeTag>
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struct Splices
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{
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using type = std::tuple<>;
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};
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//! implementation details for template meta programming
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namespace Detail {
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//! check if a property P is defined
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template<class P>
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constexpr auto isDefinedProperty(int)
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-> decltype(std::integral_constant<bool, !std::is_same<typename P::type, UndefinedProperty>::value>{})
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{ return {}; }
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//! fall back if a Property is defined
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template<class P>
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constexpr std::true_type isDefinedProperty(...) { return {}; }
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//! check if a TypeTag inherits from other TypeTags
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template<class T>
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constexpr auto hasParentTypeTag(int)
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-> decltype(std::declval<typename T::InheritsFrom>(), std::true_type{})
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{ return {}; }
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//! fall back if a TypeTag doesn't inherit
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template<class T>
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constexpr std::false_type hasParentTypeTag(...) { return {}; }
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//! helper alias to concatenate multiple tuples
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template<class ...Tuples>
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using ConCatTuples = decltype(std::tuple_cat(std::declval<Tuples>()...));
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//! helper struct to get the first property that is defined in the TypeTag hierarchy
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template<class TypeTag, template<class,class> class Property, class TTagList>
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struct GetDefined;
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//! helper struct to iterate over the TypeTag hierarchy
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template<class TypeTag, template<class,class> class Property, class TTagList, class Enable>
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struct GetNextTypeTag;
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template<class TypeTag, template<class,class> class Property, class LastTypeTag>
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struct GetNextTypeTag<TypeTag, Property, std::tuple<LastTypeTag>, std::enable_if_t<hasParentTypeTag<LastTypeTag>(int{}), void>>
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{ using type = typename GetDefined<TypeTag, Property, typename LastTypeTag::InheritsFrom>::type; };
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template<class TypeTag, template<class,class> class Property, class LastTypeTag>
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struct GetNextTypeTag<TypeTag, Property, std::tuple<LastTypeTag>, std::enable_if_t<!hasParentTypeTag<LastTypeTag>(int{}), void>>
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{ using type = UndefinedProperty; };
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template<class TypeTag, template<class,class> class Property, class FirstTypeTag, class ...Args>
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struct GetNextTypeTag<TypeTag, Property, std::tuple<FirstTypeTag, Args...>, std::enable_if_t<hasParentTypeTag<FirstTypeTag>(int{}), void>>
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{ using type = typename GetDefined<TypeTag, Property, ConCatTuples<typename FirstTypeTag::InheritsFrom, std::tuple<Args...>>>::type; };
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template<class TypeTag, template<class,class> class Property, class FirstTypeTag, class ...Args>
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struct GetNextTypeTag<TypeTag, Property, std::tuple<FirstTypeTag, Args...>, std::enable_if_t<!hasParentTypeTag<FirstTypeTag>(int{}), void>>
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{ using type = typename GetDefined<TypeTag, Property, std::tuple<Args...>>::type; };
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template<class TypeTag, template<class,class> class Property, class LastTypeTag>
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struct GetDefined<TypeTag, Property, std::tuple<LastTypeTag>>
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{
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// For clang, the following alias triggers compiler warnings if instantiated
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// from something like `GetPropType<..., DeprecatedProperty>`, even if that is
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// contained in a diagnostic pragma construct that should prevent these warnings.
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// As a workaround, also add the pragmas around this line.
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// See the discussion in MR 1647 for more details.
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#ifdef __clang__
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#pragma clang diagnostic push
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#pragma clang diagnostic ignored "-Wdeprecated-declarations"
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#endif
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using LastType = Property<TypeTag, LastTypeTag>;
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#ifdef __clang__
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#pragma clang diagnostic pop
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#endif
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using type = std::conditional_t<isDefinedProperty<LastType>(int{}), LastType,
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typename GetNextTypeTag<TypeTag, Property, std::tuple<LastTypeTag>, void>::type>;
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};
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template<class TypeTag, template<class,class> class Property, class FirstTypeTag, class ...Args>
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struct GetDefined<TypeTag, Property, std::tuple<FirstTypeTag, Args...>>
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{
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// See the comment above.
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#ifdef __clang__
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#pragma clang diagnostic push
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#pragma clang diagnostic ignored "-Wdeprecated-declarations"
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#endif
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using FirstType = Property<TypeTag, FirstTypeTag>;
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#ifdef __clang__
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#pragma clang diagnostic pop
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#endif
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using type = std::conditional_t<isDefinedProperty<FirstType>(int{}), FirstType,
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typename GetNextTypeTag<TypeTag, Property, std::tuple<FirstTypeTag, Args...>, void>::type>;
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};
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//! helper struct to get the first property that is defined in the TypeTag hierarchy
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template<class TypeTag, class TTagList>
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struct GetDefinedSplice;
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//! helper struct to iterate over the TypeTag hierarchy
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template<class TypeTag, class TTagList, class Enable>
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struct GetNextSpliceTypeTag;
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template<class TypeTag, class LastTypeTag>
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struct GetNextSpliceTypeTag<TypeTag, std::tuple<LastTypeTag>, std::enable_if_t<hasParentTypeTag<LastTypeTag>(int{}), void>>
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{ using type = typename GetDefinedSplice<TypeTag, typename LastTypeTag::InheritsFrom>::type; };
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template<class TypeTag, class LastTypeTag>
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struct GetNextSpliceTypeTag<TypeTag, std::tuple<LastTypeTag>, std::enable_if_t<!hasParentTypeTag<LastTypeTag>(int{}), void>>
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{ using type = std::tuple<>; };
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template<class TypeTag, class FirstTypeTag, class ...Args>
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struct GetNextSpliceTypeTag<TypeTag, std::tuple<FirstTypeTag, Args...>, std::enable_if_t<hasParentTypeTag<FirstTypeTag>(int{}), void>>
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{ using type = typename GetDefinedSplice<TypeTag, ConCatTuples<typename FirstTypeTag::InheritsFrom, std::tuple<Args...>>>::type; };
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template<class TypeTag, class FirstTypeTag, class ...Args>
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struct GetNextSpliceTypeTag<TypeTag, std::tuple<FirstTypeTag, Args...>, std::enable_if_t<!hasParentTypeTag<FirstTypeTag>(int{}), void>>
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{ using type = typename GetDefinedSplice<TypeTag, std::tuple<Args...>>::type; };
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//! check if a splice S is defined
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template<class S>
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constexpr auto isDefinedSplice(int)
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-> decltype(std::integral_constant<bool, !std::is_same<typename S::type, std::tuple<>>::value>{})
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{ return {}; }
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//! fall back if a splice is defined
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template<class S>
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constexpr std::true_type isDefinedSplice(...) { return {}; }
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template<class TypeTag, class LastTypeTag>
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struct GetDefinedSplice<TypeTag, std::tuple<LastTypeTag>>
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{
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using LastSplice = Splices<TypeTag, LastTypeTag>;
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using nexttuple = typename GetNextSpliceTypeTag<TypeTag,
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ConCatTuples<
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std::tuple<LastTypeTag>,
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typename LastSplice::type
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>,
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void>::type;
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using type = std::conditional_t<isDefinedSplice<LastSplice>(int{}),
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ConCatTuples<nexttuple, typename LastSplice::type>,
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nexttuple>;
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};
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template<class TypeTag, class FirstTypeTag, class ...Args>
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struct GetDefinedSplice<TypeTag, std::tuple<FirstTypeTag, Args...>>
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{
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using FirstSplice = Splices<TypeTag, FirstTypeTag>;
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using nexttuple = typename GetNextSpliceTypeTag<TypeTag,
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ConCatTuples<
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std::tuple<FirstTypeTag, Args...>,
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typename FirstSplice::type
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>,
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void>::type;
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using type = std::conditional_t<isDefinedSplice<FirstSplice>(int{}),
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ConCatTuples<typename FirstSplice::type, nexttuple>,
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nexttuple>;
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};
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//! helper struct to extract get the Property specilization given a TypeTag, asserts that the property is defined
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template<class TypeTag, template<class,class> class Property>
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struct GetPropImpl
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{
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using tuple = typename Detail::GetDefinedSplice<TypeTag, std::tuple<TypeTag>>::type;
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using type = typename Detail::GetDefined<TypeTag,
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Property,
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ConCatTuples<std::tuple<TypeTag>, tuple>
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>::type;
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static_assert(!std::is_same<type, UndefinedProperty>::value, "Property is undefined!");
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};
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template<class TypeTag, class SpliceTypeTag, template<class,class> class Property>
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struct GetSplicePropImpl
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{
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using type = typename Detail::GetDefined<TypeTag, Property, std::tuple<TypeTag, SpliceTypeTag>>::type;
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static_assert(!std::is_same<type, std::tuple<>>::value, "Splice is undefined!");
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};
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template <typename, class = void>
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struct has_name : public std::false_type {};
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template <typename T>
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struct has_name<T, decltype((void)T::name, void())>
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: public std::true_type {};
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} // end namespace Detail
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} // end namespace Property
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//! get the type of a property (equivalent to old macro GET_PROP(...))
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template<class TypeTag, template<class,class> class Property>
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using GetProp = typename Properties::Detail::GetPropImpl<TypeTag, Property>::type;
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// See the comment above.
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#ifdef __clang__
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#pragma clang diagnostic push
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#pragma clang diagnostic ignored "-Wdeprecated-declarations"
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#endif
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//! get the type alias defined in the property (equivalent to old macro GET_PROP_TYPE(...))
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template<class TypeTag, template<class,class> class Property>
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using GetPropType = typename Properties::Detail::GetPropImpl<TypeTag, Property>::type::type;
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template<class TypeTag, class SpliceTypeTag, template<class,class> class Property>
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using GetSplicePropType = typename Properties::Detail::GetSplicePropImpl<TypeTag, SpliceTypeTag, Property>::type::type;
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//! get the value data member of a property
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template<class TypeTag, template<class,class> class Property>
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constexpr auto getPropValue() { return Properties::Detail::GetPropImpl<TypeTag, Property>::type::value; }
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//! get the name data member of a property
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template<class TypeTag, template<class,class> class Property>
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auto getPropName()
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{
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using type = typename Properties::Detail::GetPropImpl<TypeTag,Property>::type;
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if constexpr (Properties::Detail::has_name<type>::value) {
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return Properties::Detail::GetPropImpl<TypeTag, Property>::type::name;
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} else {
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std::string paramName = Dune::className<type>();
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paramName.replace(0, std::strlen("Opm::Properties::"), "");
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const auto pos = paramName.find_first_of('<');
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paramName.erase(pos);
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return paramName;
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}
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}
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#ifdef __clang__
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#pragma clang diagnostic pop
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#endif
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} // end namespace Opm
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#endif
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