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update optional.hpp: fixes building on older clang versions

optional
Antonio SJ Musumeci 4 years ago
parent
b1c6d4864f
commit
a520946572
1 changed files with 80 additions and 31 deletions
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  1. 111
      src/nonstd/optional.hpp

111
src/nonstd/optional.hpp
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@ -293,18 +293,28 @@ namespace nonstd {
#define optional_CPP11_140 (optional_CPP11_OR_GREATER_ || optional_COMPILER_MSVC_VER >= 1900)
#define optional_CPP11_141 (optional_CPP11_OR_GREATER_ || optional_COMPILER_MSVC_VER >= 1910)
#define optional_CPP11_140_490 ((optional_CPP11_OR_GREATER_ && optional_COMPILER_GNUC_VERSION >= 490) || (optional_COMPILER_MSVC_VER >= 1910))
#define optional_CPP14_000 (optional_CPP14_OR_GREATER)
#define optional_CPP17_000 (optional_CPP17_OR_GREATER)
// gcc >= 4.9, msvc >= vc14.1 (vs17):
#define optional_CPP11_140_G490 ((optional_CPP11_OR_GREATER_ && optional_COMPILER_GNUC_VERSION >= 490) || (optional_COMPILER_MSVC_VER >= 1910))
// clang >= 3.5, msvc >= vc11 (vs12):
#define optional_CPP11_110_C350 ( optional_CPP11_110 && !optional_BETWEEN( optional_COMPILER_CLANG_VERSION, 1, 350 ) )
// clang >= 3.5, gcc >= 5.0, msvc >= vc11 (vs12):
#define optional_CPP11_110_C350_G500 \
( optional_CPP11_110 && \
!( optional_BETWEEN( optional_COMPILER_CLANG_VERSION, 1, 350 ) \
|| optional_BETWEEN( optional_COMPILER_GNUC_VERSION , 1, 500 ) ) )
// Presence of C++11 language features:
#define optional_HAVE_CONSTEXPR_11 optional_CPP11_140
#define optional_HAVE_IS_DEFAULT optional_CPP11_140
#define optional_HAVE_NOEXCEPT optional_CPP11_140
#define optional_HAVE_NULLPTR optional_CPP11_100
#define optional_HAVE_REF_QUALIFIER optional_CPP11_140_490
#define optional_HAVE_REF_QUALIFIER optional_CPP11_140_G490
#define optional_HAVE_INITIALIZER_LIST optional_CPP11_140
// Presence of C++14 language features:
@ -324,6 +334,13 @@ namespace nonstd {
#define optional_HAVE_TR1_TYPE_TRAITS (!! optional_COMPILER_GNUC_VERSION )
#define optional_HAVE_TR1_ADD_POINTER (!! optional_COMPILER_GNUC_VERSION )
#define optional_HAVE_IS_ASSIGNABLE optional_CPP11_110_C350
#define optional_HAVE_IS_MOVE_CONSTRUCTIBLE optional_CPP11_110_C350
#define optional_HAVE_IS_NOTHROW_MOVE_ASSIGNABLE optional_CPP11_110_C350
#define optional_HAVE_IS_NOTHROW_MOVE_CONSTRUCTIBLE optional_CPP11_110_C350
#define optional_HAVE_IS_TRIVIALLY_COPY_CONSTRUCTIBLE optional_CPP11_110_C350_G500
#define optional_HAVE_IS_TRIVIALLY_MOVE_CONSTRUCTIBLE optional_CPP11_110_C350_G500
// C++ feature usage:
#if optional_HAVE( CONSTEXPR_11 )
@ -419,6 +436,12 @@ namespace nonstd { namespace optional_lite {
namespace std11 {
template< class T, T v > struct integral_constant { enum { value = v }; };
template< bool B > struct bool_constant : integral_constant<bool, B>{};
typedef bool_constant< true > true_type;
typedef bool_constant< false > false_type;
#if optional_CPP11_OR_GREATER
using std::move;
#else
@ -432,16 +455,42 @@ namespace std11 {
template< typename T, typename F > struct conditional<false, T, F> { typedef F type; };
#endif // optional_HAVE_CONDITIONAL
// gcc < 5:
#if optional_CPP11_OR_GREATER
#if optional_BETWEEN( optional_COMPILER_GNUC_VERSION, 1, 500 )
template< typename T > struct is_trivially_copy_constructible : std::true_type{};
template< typename T > struct is_trivially_move_constructible : std::true_type{};
#if optional_HAVE( IS_ASSIGNABLE )
using std::is_assignable;
#else
template< class T, class U > struct is_assignable : std11::true_type{};
#endif
#if optional_HAVE( IS_MOVE_CONSTRUCTIBLE )
using std::is_move_constructible;
#else
template< class T > struct is_move_constructible : std11::true_type{};
#endif
#if optional_HAVE( IS_NOTHROW_MOVE_ASSIGNABLE )
using std::is_nothrow_move_assignable;
#else
template< class T > struct is_nothrow_move_assignable : std11::true_type{};
#endif
#if optional_HAVE( IS_NOTHROW_MOVE_CONSTRUCTIBLE )
using std::is_nothrow_move_constructible;
#else
template< class T > struct is_nothrow_move_constructible : std11::true_type{};
#endif
#if optional_HAVE( IS_TRIVIALLY_COPY_CONSTRUCTIBLE )
using std::is_trivially_copy_constructible;
using std::is_trivially_move_constructible;
#else
template< class T > struct is_trivially_copy_constructible : std11::true_type{};
#endif
#if optional_HAVE( IS_TRIVIALLY_MOVE_CONSTRUCTIBLE )
using std::is_trivially_move_constructible;
#else
template< class T > struct is_trivially_move_constructible : std11::true_type{};
#endif
} // namespace std11
#if optional_CPP11_OR_GREATER
@ -464,10 +513,10 @@ using std::swap;
struct is_swappable
{
template< typename T, typename = decltype( swap( std::declval<T&>(), std::declval<T&>() ) ) >
static std::true_type test( int /*unused*/ );
static std11::true_type test( int /*unused*/ );
template< typename >
static std::false_type test(...);
static std11::false_type test(...);
};
struct is_nothrow_swappable
@ -481,10 +530,10 @@ struct is_nothrow_swappable
}
template< typename T >
static auto test( int /*unused*/ ) -> std::integral_constant<bool, satisfies<T>()>{}
static auto test( int /*unused*/ ) -> std11::integral_constant<bool, satisfies<T>()>{}
template< typename >
static auto test(...) -> std::false_type;
static auto test(...) -> std11::false_type;
};
} // namespace detail
@ -891,13 +940,13 @@ public:
// 3 (C++11) - move-construct from optional
template< typename U = T
optional_REQUIRES_T(
std::is_move_constructible<U>::value
std11::is_move_constructible<U>::value
|| std11::is_trivially_move_constructible<U>::value
)
>
optional_constexpr14 optional( optional && other )
// NOLINTNEXTLINE( performance-noexcept-move-constructor )
noexcept( std::is_nothrow_move_constructible<T>::value )
noexcept( std11::is_nothrow_move_constructible<T>::value )
: has_value_( other.has_value() )
{
if ( other.has_value() )
@ -1101,8 +1150,8 @@ public:
)
operator=( optional const & other )
noexcept(
std::is_nothrow_move_assignable<T>::value
&& std::is_nothrow_move_constructible<T>::value
std11::is_nothrow_move_assignable<T>::value
&& std11::is_nothrow_move_constructible<T>::value
)
#else
optional & operator=( optional const & other )
@ -1121,7 +1170,7 @@ public:
optional_REQUIRES_R(
optional &,
true
// std::is_move_constructible<T>::value
// std11::is_move_constructible<T>::value
// && std::is_move_assignable<T>::value
)
operator=( optional && other ) noexcept
@ -1138,7 +1187,7 @@ public:
optional_REQUIRES_R(
optional &,
std::is_constructible<T , U>::value
&& std::is_assignable<T&, U>::value
&& std11::is_assignable<T&, U>::value
&& !std::is_same<typename std20::remove_cvref<U>::type, nonstd_lite_in_place_t(U)>::value
&& !std::is_same<typename std20::remove_cvref<U>::type, optional<T>>::value
&& !(std::is_scalar<T>::value && std::is_same<T, typename std::decay<U>::type>::value)
@ -1176,7 +1225,7 @@ public:
optional_REQUIRES_R(
optional&,
std::is_constructible< T , U const &>::value
&& std::is_assignable< T&, U const &>::value
&& std11::is_assignable< T&, U const &>::value
&& !std::is_constructible<T, optional<U> & >::value
&& !std::is_constructible<T, optional<U> && >::value
&& !std::is_constructible<T, optional<U> const & >::value
@ -1185,10 +1234,10 @@ public:
&& !std::is_convertible< optional<U> && , T>::value
&& !std::is_convertible< optional<U> const & , T>::value
&& !std::is_convertible< optional<U> const &&, T>::value
&& !std::is_assignable< T&, optional<U> & >::value
&& !std::is_assignable< T&, optional<U> && >::value
&& !std::is_assignable< T&, optional<U> const & >::value
&& !std::is_assignable< T&, optional<U> const && >::value
&& !std11::is_assignable< T&, optional<U> & >::value
&& !std11::is_assignable< T&, optional<U> && >::value
&& !std11::is_assignable< T&, optional<U> const & >::value
&& !std11::is_assignable< T&, optional<U> const && >::value
)
#else
optional&
@ -1206,7 +1255,7 @@ public:
optional_REQUIRES_R(
optional&,
std::is_constructible< T , U>::value
&& std::is_assignable< T&, U>::value
&& std11::is_assignable< T&, U>::value
&& !std::is_constructible<T, optional<U> & >::value
&& !std::is_constructible<T, optional<U> && >::value
&& !std::is_constructible<T, optional<U> const & >::value
@ -1215,10 +1264,10 @@ public:
&& !std::is_convertible< optional<U> && , T>::value
&& !std::is_convertible< optional<U> const & , T>::value
&& !std::is_convertible< optional<U> const &&, T>::value
&& !std::is_assignable< T&, optional<U> & >::value
&& !std::is_assignable< T&, optional<U> && >::value
&& !std::is_assignable< T&, optional<U> const & >::value
&& !std::is_assignable< T&, optional<U> const && >::value
&& !std11::is_assignable< T&, optional<U> & >::value
&& !std11::is_assignable< T&, optional<U> && >::value
&& !std11::is_assignable< T&, optional<U> const & >::value
&& !std11::is_assignable< T&, optional<U> const && >::value
)
operator=( optional<U> && other )
{
@ -1260,7 +1309,7 @@ public:
void swap( optional & other )
#if optional_CPP11_OR_GREATER
noexcept(
std::is_nothrow_move_constructible<T>::value
std11::is_nothrow_move_constructible<T>::value
&& std17::is_nothrow_swappable<T>::value
)
#endif
@ -1626,7 +1675,7 @@ inline optional_constexpr bool operator>=( U const & v, optional<T> const & x )
template< typename T
#if optional_CPP11_OR_GREATER
optional_REQUIRES_T(
std::is_move_constructible<T>::value
std11::is_move_constructible<T>::value
&& std17::is_swappable<T>::value )
#endif
>

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