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Merge pull request #104 from boostorg/feature/allocator_access

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Support additional is_empty intrinsics
This commit is contained in:
Glen Fernandes
2021-12-07 11:02:04 -05:00
committed by GitHub
parent d038633f98 eb7bc1ff53
commit f5ab83efe8
1 changed files with 16 additions and 11 deletions
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27
include/boost/core/allocator_access.hpp
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@ -20,15 +20,21 @@ Distributed under the Boost Software License, Version 1.0.
#endif
#if defined(BOOST_GCC_VERSION) && (BOOST_GCC_VERSION >= 40300)
#define BOOST_DETAIL_ALLOC_HAS_IS_EMPTY
#define BOOST_DETAIL_ALLOC_EMPTY(T) __is_empty(T)
#elif defined(BOOST_INTEL) && defined(_MSC_VER) && (_MSC_VER >= 1500)
#define BOOST_DETAIL_ALLOC_HAS_IS_EMPTY
#define BOOST_DETAIL_ALLOC_EMPTY(T) __is_empty(T)
#elif defined(BOOST_MSVC) && (BOOST_MSVC >= 1400)
#define BOOST_DETAIL_ALLOC_HAS_IS_EMPTY
#define BOOST_DETAIL_ALLOC_EMPTY(T) __is_empty(T)
#elif defined(BOOST_CLANG) && !defined(__CUDACC__)
#if __has_feature(is_empty)
#define BOOST_DETAIL_ALLOC_HAS_IS_EMPTY
#define BOOST_DETAIL_ALLOC_EMPTY(T) __is_empty(T)
#endif
#elif defined(__SUNPRO_CC) && (__SUNPRO_CC >= 0x5130)
#define BOOST_DETAIL_ALLOC_EMPTY(T) __oracle_is_empty(T)
#elif defined(__ghs__) && (__GHS_VERSION_NUMBER >= 600)
#define BOOST_DETAIL_ALLOC_EMPTY(T) __is_empty(T)
#elif defined(BOOST_CODEGEARC)
#define BOOST_DETAIL_ALLOC_EMPTY(T) __is_empty(T)
#endif
#if defined(_LIBCPP_SUPPRESS_DEPRECATED_PUSH)
@ -329,10 +335,10 @@ template<class A, class = void>
struct alloc_equal {
typedef typename std::is_empty<A>::type type;
};
#elif defined(BOOST_DETAIL_ALLOC_HAS_IS_EMPTY)
#elif defined(BOOST_DETAIL_ALLOC_EMPTY)
template<class A, class = void>
struct alloc_equal {
typedef alloc_bool<__is_empty(A)> type;
typedef alloc_bool<BOOST_DETAIL_ALLOC_EMPTY(A)> type;
};
#else
template<class A, class = void>
@ -385,9 +391,9 @@ struct alloc_none { };
template<class A>
class alloc_has_allocate {
template<class O>
static auto check(int) -> decltype(std::declval<O&>().allocate(
std::declval<typename boost::allocator_size_type<A>::type>(),
std::declval<typename
static auto check(int)
-> decltype(std::declval<O&>().allocate(std::declval<typename
boost::allocator_size_type<A>::type>(), std::declval<typename
boost::allocator_const_void_pointer<A>::type>()));
template<class>
@ -658,8 +664,7 @@ public:
template<class A>
class alloc_has_soccc {
template<class O>
static auto check(int)
-> decltype(std::declval<const
static auto check(int) -> decltype(std::declval<const
O&>().select_on_container_copy_construction());
template<class>