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Add detail/is_range.hpp

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This commit is contained in:
Peter Dimov
2021-10-16 20:44:32 +03:00
parent 9bbedce029
commit 415f2fafe2
3 changed files with 155 additions and 0 deletions
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55
include/boost/container_hash/detail/is_range.hpp Normal file
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@@ -0,0 +1,55 @@
// Copyright 2017 Peter Dimov.
// Distributed under the Boost Software License, Version 1.0.
// https://www.boost.org/LICENSE_1_0.txt
#ifndef BOOST_HASH_DETAIL_IS_RANGE_HPP_INCLUDED
#define BOOST_HASH_DETAIL_IS_RANGE_HPP_INCLUDED
#include <boost/type_traits/integral_constant.hpp>
#include <boost/type_traits/is_integral.hpp>
#include <boost/type_traits/declval.hpp>
#include <boost/type_traits/is_same.hpp>
#include <boost/core/enable_if.hpp>
#include <boost/config.hpp>
#include <boost/config/workaround.hpp>
#include <iterator>
namespace boost
{
namespace hash_detail
{
#if !defined(BOOST_NO_CXX11_DECLTYPE) && !defined(BOOST_NO_SFINAE_EXPR) && !BOOST_WORKAROUND(BOOST_GCC, < 40700)
template<class It> true_type is_range_check( It first, It last, typename std::iterator_traits<It>::difference_type* = 0 );
template<class T> decltype( is_range_check( declval<T const&>().begin(), declval<T const&>().end() ) ) is_range_( int );
template<class T> false_type is_range_( ... );
template<class T> struct is_range: decltype( is_range_<T>( 0 ) )
{
};
#else
template<class T, class E = true_type> struct is_range_: false_type
{
};
template<class T> struct is_range_< T, integral_constant< bool,
is_same<typename T::value_type, typename std::iterator_traits<typename T::const_iterator>::value_type>::value &&
is_integral<typename T::size_type>::value
> >: true_type
{
};
template<class T> struct is_range: is_range_<T>
{
};
#endif // !defined(BOOST_NO_CXX11_DECLTYPE) && !defined(BOOST_NO_SFINAE_EXPR)
} // namespace hash_detail
} // namespace boost
#endif // #ifndef BOOST_HASH_DETAIL_IS_RANGE_HPP_INCLUDED

2
test/Jamfile.v2
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@@ -85,3 +85,5 @@ test-suite container_hash/hash_no_generic_float
explicit container_hash/hash_no_generic_float ;
build-project ../examples ;
run detail_is_range_test.cpp ;

98
test/detail_is_range_test.cpp Normal file
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@@ -0,0 +1,98 @@
// Copyright 2017 Peter Dimov.
// Distributed under the Boost Software License, Version 1.0.
// https://www.boost.org/LICENSE_1_0.txt
#include <boost/container_hash/detail/is_range.hpp>
#include <boost/core/lightweight_test_trait.hpp>
#include <boost/config.hpp>
#include <string>
#include <vector>
#include <list>
#include <deque>
#include <set>
#include <map>
#if !defined(BOOST_NO_CXX11_HDR_ARRAY)
# include <array>
#endif
#if !defined(BOOST_NO_CXX11_HDR_FORWARD_LIST)
# include <forward_list>
#endif
#if !defined(BOOST_NO_CXX11_HDR_UNORDERED_SET)
# include <unordered_set>
#endif
#if !defined(BOOST_NO_CXX11_HDR_UNORDERED_MAP)
# include <unordered_map>
#endif
struct X
{
};
int main()
{
using boost::hash_detail::is_range;
BOOST_TEST_TRAIT_FALSE((is_range<void>));
BOOST_TEST_TRAIT_FALSE((is_range<void const>));
BOOST_TEST_TRAIT_FALSE((is_range<int>));
BOOST_TEST_TRAIT_FALSE((is_range<int const>));
BOOST_TEST_TRAIT_FALSE((is_range<X>));
BOOST_TEST_TRAIT_FALSE((is_range<X const>));
BOOST_TEST_TRAIT_FALSE((is_range<int[2]>));
BOOST_TEST_TRAIT_FALSE((is_range<int const[2]>));
BOOST_TEST_TRAIT_TRUE((is_range<std::string>));
BOOST_TEST_TRAIT_TRUE((is_range<std::string const>));
BOOST_TEST_TRAIT_TRUE((is_range<std::wstring>));
BOOST_TEST_TRAIT_TRUE((is_range<std::wstring const>));
BOOST_TEST_TRAIT_TRUE((is_range< std::vector<X> >));
BOOST_TEST_TRAIT_TRUE((is_range< std::vector<X> const >));
BOOST_TEST_TRAIT_TRUE((is_range< std::deque<X> >));
BOOST_TEST_TRAIT_TRUE((is_range< std::deque<X> const >));
BOOST_TEST_TRAIT_TRUE((is_range< std::set<int> >));
BOOST_TEST_TRAIT_TRUE((is_range< std::set<int> const >));
BOOST_TEST_TRAIT_TRUE((is_range< std::multiset<int> >));
BOOST_TEST_TRAIT_TRUE((is_range< std::multiset<int> const >));
BOOST_TEST_TRAIT_TRUE((is_range< std::map<int, X> >));
BOOST_TEST_TRAIT_TRUE((is_range< std::map<int, X> const >));
BOOST_TEST_TRAIT_TRUE((is_range< std::multimap<int, X> >));
BOOST_TEST_TRAIT_TRUE((is_range< std::multimap<int, X> const >));
#if !defined(BOOST_NO_CXX11_HDR_ARRAY)
BOOST_TEST_TRAIT_TRUE((is_range< std::array<X, 2> >));
BOOST_TEST_TRAIT_TRUE((is_range< std::array<X, 2> const >));
#endif
#if !defined(BOOST_NO_CXX11_HDR_FORWARD_LIST)
BOOST_TEST_TRAIT_TRUE((is_range< std::forward_list<X> >));
BOOST_TEST_TRAIT_TRUE((is_range< std::forward_list<X> const >));
#endif
#if !defined(BOOST_NO_CXX11_HDR_UNORDERED_SET)
BOOST_TEST_TRAIT_TRUE((is_range< std::unordered_set<int> >));
BOOST_TEST_TRAIT_TRUE((is_range< std::unordered_set<int> const >));
BOOST_TEST_TRAIT_TRUE((is_range< std::unordered_multiset<int> >));
BOOST_TEST_TRAIT_TRUE((is_range< std::unordered_multiset<int> const >));
#endif
#if !defined(BOOST_NO_CXX11_HDR_UNORDERED_MAP)
BOOST_TEST_TRAIT_TRUE((is_range< std::unordered_map<int, X> >));
BOOST_TEST_TRAIT_TRUE((is_range< std::unordered_map<int, X> const >));
BOOST_TEST_TRAIT_TRUE((is_range< std::unordered_multimap<int, X> >));
BOOST_TEST_TRAIT_TRUE((is_range< std::unordered_multimap<int, X> const >));
#endif
return boost::report_errors();
}