mirror of
https://github.com/ecency/ecency-mobile.git
synced 2024-12-22 12:51:42 +03:00
323 lines
12 KiB
C++
323 lines
12 KiB
C++
/*!
|
|
@file
|
|
Defines `boost::hana::set`.
|
|
|
|
@copyright Louis Dionne 2013-2016
|
|
Distributed under the Boost Software License, Version 1.0.
|
|
(See accompanying file LICENSE.md or copy at http://boost.org/LICENSE_1_0.txt)
|
|
*/
|
|
|
|
#ifndef BOOST_HANA_SET_HPP
|
|
#define BOOST_HANA_SET_HPP
|
|
|
|
#include <boost/hana/fwd/set.hpp>
|
|
|
|
#include <boost/hana/at.hpp>
|
|
#include <boost/hana/bool.hpp>
|
|
#include <boost/hana/concept/comparable.hpp>
|
|
#include <boost/hana/concept/constant.hpp>
|
|
#include <boost/hana/concept/hashable.hpp>
|
|
#include <boost/hana/config.hpp>
|
|
#include <boost/hana/contains.hpp>
|
|
#include <boost/hana/core/make.hpp>
|
|
#include <boost/hana/core/to.hpp>
|
|
#include <boost/hana/detail/decay.hpp>
|
|
#include <boost/hana/detail/fast_and.hpp>
|
|
#include <boost/hana/detail/has_duplicates.hpp>
|
|
#include <boost/hana/detail/operators/adl.hpp>
|
|
#include <boost/hana/detail/operators/comparable.hpp>
|
|
#include <boost/hana/detail/operators/searchable.hpp>
|
|
#include <boost/hana/equal.hpp>
|
|
#include <boost/hana/erase_key.hpp>
|
|
#include <boost/hana/find_if.hpp>
|
|
#include <boost/hana/fold_left.hpp>
|
|
#include <boost/hana/fwd/any_of.hpp>
|
|
#include <boost/hana/fwd/core/to.hpp>
|
|
#include <boost/hana/fwd/difference.hpp>
|
|
#include <boost/hana/fwd/intersection.hpp>
|
|
#include <boost/hana/fwd/union.hpp>
|
|
#include <boost/hana/insert.hpp>
|
|
#include <boost/hana/is_subset.hpp>
|
|
#include <boost/hana/length.hpp>
|
|
#include <boost/hana/or.hpp>
|
|
#include <boost/hana/remove.hpp>
|
|
#include <boost/hana/tuple.hpp>
|
|
#include <boost/hana/unpack.hpp>
|
|
#include <boost/hana/value.hpp>
|
|
|
|
#include <cstddef>
|
|
#include <type_traits>
|
|
#include <utility>
|
|
|
|
|
|
BOOST_HANA_NAMESPACE_BEGIN
|
|
//////////////////////////////////////////////////////////////////////////
|
|
// set
|
|
//////////////////////////////////////////////////////////////////////////
|
|
//! @cond
|
|
template <typename ...Xs>
|
|
struct set
|
|
: detail::operators::adl<set<Xs...>>
|
|
, detail::searchable_operators<set<Xs...>>
|
|
{
|
|
tuple<Xs...> storage;
|
|
using hana_tag = set_tag;
|
|
static constexpr std::size_t size = sizeof...(Xs);
|
|
|
|
explicit constexpr set(tuple<Xs...> const& xs)
|
|
: storage(xs)
|
|
{ }
|
|
|
|
explicit constexpr set(tuple<Xs...>&& xs)
|
|
: storage(static_cast<tuple<Xs...>&&>(xs))
|
|
{ }
|
|
|
|
constexpr set(set const& other) = default;
|
|
constexpr set(set&& other) = default;
|
|
};
|
|
//! @endcond
|
|
|
|
//////////////////////////////////////////////////////////////////////////
|
|
// Operators
|
|
//////////////////////////////////////////////////////////////////////////
|
|
namespace detail {
|
|
template <>
|
|
struct comparable_operators<set_tag> {
|
|
static constexpr bool value = true;
|
|
};
|
|
}
|
|
|
|
//////////////////////////////////////////////////////////////////////////
|
|
// make<set_tag>
|
|
//////////////////////////////////////////////////////////////////////////
|
|
template <>
|
|
struct make_impl<set_tag> {
|
|
template <typename ...Xs>
|
|
static constexpr auto apply(Xs&& ...xs) {
|
|
#if defined(BOOST_HANA_CONFIG_ENABLE_DEBUG_MODE)
|
|
static_assert(detail::fast_and<hana::Comparable<Xs>::value...>::value,
|
|
"hana::make_set(xs...) requires all the 'xs' to be Comparable");
|
|
|
|
static_assert(detail::fast_and<hana::Hashable<Xs>::value...>::value,
|
|
"hana::make_set(xs...) requires all the 'xs' to be Hashable");
|
|
|
|
static_assert(detail::fast_and<
|
|
Constant<decltype(hana::equal(xs, xs))>::value...
|
|
>::value,
|
|
"hana::make_set(xs...) requires all the 'xs' to be "
|
|
"Comparable at compile-time");
|
|
|
|
static_assert(!detail::has_duplicates<Xs&&...>::value,
|
|
"hana::make_set(xs...) requires all the 'xs' to be unique");
|
|
#endif
|
|
|
|
return set<typename detail::decay<Xs>::type...>{
|
|
hana::make_tuple(static_cast<Xs&&>(xs)...)
|
|
};
|
|
}
|
|
};
|
|
|
|
//////////////////////////////////////////////////////////////////////////
|
|
// Comparable
|
|
//////////////////////////////////////////////////////////////////////////
|
|
template <>
|
|
struct equal_impl<set_tag, set_tag> {
|
|
template <typename S1, typename S2>
|
|
static constexpr auto equal_helper(S1 const& s1, S2 const& s2, hana::true_)
|
|
{ return hana::is_subset(s1, s2); }
|
|
|
|
template <typename S1, typename S2>
|
|
static constexpr auto equal_helper(S1 const&, S2 const&, hana::false_)
|
|
{ return hana::false_c; }
|
|
|
|
template <typename S1, typename S2>
|
|
static constexpr decltype(auto) apply(S1&& s1, S2&& s2) {
|
|
return equal_impl::equal_helper(s1, s2, hana::bool_c<
|
|
decltype(hana::length(s1.storage))::value ==
|
|
decltype(hana::length(s2.storage))::value
|
|
>);
|
|
}
|
|
};
|
|
|
|
//////////////////////////////////////////////////////////////////////////
|
|
// Foldable
|
|
//////////////////////////////////////////////////////////////////////////
|
|
template <>
|
|
struct unpack_impl<set_tag> {
|
|
template <typename Set, typename F>
|
|
static constexpr decltype(auto) apply(Set&& set, F&& f) {
|
|
return hana::unpack(static_cast<Set&&>(set).storage,
|
|
static_cast<F&&>(f));
|
|
}
|
|
};
|
|
|
|
//////////////////////////////////////////////////////////////////////////
|
|
// Searchable
|
|
//////////////////////////////////////////////////////////////////////////
|
|
template <>
|
|
struct find_if_impl<set_tag> {
|
|
template <typename Xs, typename Pred>
|
|
static constexpr auto apply(Xs&& xs, Pred&& pred) {
|
|
return hana::find_if(static_cast<Xs&&>(xs).storage, static_cast<Pred&&>(pred));
|
|
}
|
|
};
|
|
|
|
template <>
|
|
struct any_of_impl<set_tag> {
|
|
template <typename Pred>
|
|
struct any_of_helper {
|
|
Pred const& pred;
|
|
template <typename ...X>
|
|
constexpr auto operator()(X const& ...x) const {
|
|
return hana::or_(pred(x)...);
|
|
}
|
|
constexpr auto operator()() const {
|
|
return hana::false_c;
|
|
}
|
|
};
|
|
|
|
template <typename Xs, typename Pred>
|
|
static constexpr auto apply(Xs const& xs, Pred const& pred) {
|
|
return hana::unpack(xs.storage, any_of_helper<Pred>{pred});
|
|
}
|
|
};
|
|
|
|
template <>
|
|
struct is_subset_impl<set_tag, set_tag> {
|
|
template <typename Ys>
|
|
struct all_contained {
|
|
Ys const& ys;
|
|
template <typename ...X>
|
|
constexpr auto operator()(X const& ...x) const {
|
|
return hana::bool_c<detail::fast_and<
|
|
hana::value<decltype(hana::contains(ys, x))>()...
|
|
>::value>;
|
|
}
|
|
};
|
|
|
|
template <typename Xs, typename Ys>
|
|
static constexpr auto apply(Xs const& xs, Ys const& ys) {
|
|
return hana::unpack(xs, all_contained<Ys>{ys});
|
|
}
|
|
};
|
|
|
|
//////////////////////////////////////////////////////////////////////////
|
|
// Conversions
|
|
//////////////////////////////////////////////////////////////////////////
|
|
template <typename F>
|
|
struct to_impl<set_tag, F, when<hana::Foldable<F>::value>> {
|
|
template <typename Xs>
|
|
static constexpr decltype(auto) apply(Xs&& xs) {
|
|
return hana::fold_left(static_cast<Xs&&>(xs),
|
|
hana::make_set(),
|
|
hana::insert);
|
|
}
|
|
};
|
|
|
|
//////////////////////////////////////////////////////////////////////////
|
|
// insert
|
|
//////////////////////////////////////////////////////////////////////////
|
|
template <>
|
|
struct insert_impl<set_tag> {
|
|
template <typename Xs, typename X, typename Indices>
|
|
static constexpr auto
|
|
insert_helper(Xs&& xs, X&&, hana::true_, Indices) {
|
|
return static_cast<Xs&&>(xs);
|
|
}
|
|
|
|
template <typename Xs, typename X, std::size_t ...n>
|
|
static constexpr auto
|
|
insert_helper(Xs&& xs, X&& x, hana::false_, std::index_sequence<n...>) {
|
|
return hana::make_set(
|
|
hana::at_c<n>(static_cast<Xs&&>(xs).storage)..., static_cast<X&&>(x)
|
|
);
|
|
}
|
|
|
|
template <typename Xs, typename X>
|
|
static constexpr auto apply(Xs&& xs, X&& x) {
|
|
constexpr bool c = hana::value<decltype(hana::contains(xs, x))>();
|
|
constexpr std::size_t size = std::remove_reference<Xs>::type::size;
|
|
return insert_helper(static_cast<Xs&&>(xs), static_cast<X&&>(x),
|
|
hana::bool_c<c>, std::make_index_sequence<size>{});
|
|
}
|
|
};
|
|
|
|
//////////////////////////////////////////////////////////////////////////
|
|
// erase_key
|
|
//////////////////////////////////////////////////////////////////////////
|
|
template <>
|
|
struct erase_key_impl<set_tag> {
|
|
template <typename Xs, typename X>
|
|
static constexpr decltype(auto) apply(Xs&& xs, X&& x) {
|
|
return hana::unpack(
|
|
hana::remove(static_cast<Xs&&>(xs).storage,
|
|
static_cast<X&&>(x)),
|
|
hana::make_set
|
|
);
|
|
}
|
|
};
|
|
|
|
//////////////////////////////////////////////////////////////////////////
|
|
// intersection
|
|
//////////////////////////////////////////////////////////////////////////
|
|
namespace detail {
|
|
template <typename Ys>
|
|
struct set_insert_if_contains {
|
|
Ys const& ys;
|
|
|
|
template <typename Result, typename Key>
|
|
static constexpr auto helper(Result&& result, Key&& key, hana::true_) {
|
|
return hana::insert(static_cast<Result&&>(result), static_cast<Key&&>(key));
|
|
}
|
|
|
|
template <typename Result, typename Key>
|
|
static constexpr auto helper(Result&& result, Key&&, hana::false_) {
|
|
return static_cast<Result&&>(result);
|
|
}
|
|
|
|
template <typename Result, typename Key>
|
|
constexpr auto operator()(Result&& result, Key&& key) const {
|
|
constexpr bool keep = hana::value<decltype(hana::contains(ys, key))>();
|
|
return set_insert_if_contains::helper(static_cast<Result&&>(result),
|
|
static_cast<Key&&>(key),
|
|
hana::bool_c<keep>);
|
|
}
|
|
};
|
|
}
|
|
|
|
template <>
|
|
struct intersection_impl<set_tag> {
|
|
template <typename Xs, typename Ys>
|
|
static constexpr auto apply(Xs&& xs, Ys const& ys) {
|
|
return hana::fold_left(static_cast<Xs&&>(xs), hana::make_set(),
|
|
detail::set_insert_if_contains<Ys>{ys});
|
|
}
|
|
};
|
|
|
|
//////////////////////////////////////////////////////////////////////////
|
|
// union_
|
|
//////////////////////////////////////////////////////////////////////////
|
|
template <>
|
|
struct union_impl<set_tag> {
|
|
template <typename Xs, typename Ys>
|
|
static constexpr auto apply(Xs&& xs, Ys&& ys) {
|
|
return hana::fold_left(static_cast<Xs&&>(xs), static_cast<Ys&&>(ys),
|
|
hana::insert);
|
|
}
|
|
};
|
|
|
|
//////////////////////////////////////////////////////////////////////////
|
|
// difference
|
|
//////////////////////////////////////////////////////////////////////////
|
|
template <>
|
|
struct difference_impl<set_tag> {
|
|
template <typename Xs, typename Ys>
|
|
static constexpr auto apply(Xs&& xs, Ys&& ys) {
|
|
return hana::fold_left(static_cast<Ys&&>(ys), static_cast<Xs&&>(xs),
|
|
hana::erase_key);
|
|
}
|
|
};
|
|
BOOST_HANA_NAMESPACE_END
|
|
|
|
#endif // !BOOST_HANA_SET_HPP
|