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Update nonstd::optional to v3.4.0

pull/939/head
Antonio SJ Musumeci 3 years ago
parent
8e47bf4946
commit
7013ff9aeb
1 changed files with 107 additions and 35 deletions
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  1. 142
      src/nonstd/optional.hpp

142
src/nonstd/optional.hpp
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@ -12,7 +12,7 @@
#define NONSTD_OPTIONAL_LITE_HPP #define NONSTD_OPTIONAL_LITE_HPP
#define optional_lite_MAJOR 3 #define optional_lite_MAJOR 3
#define optional_lite_MINOR 2
#define optional_lite_MINOR 4
#define optional_lite_PATCH 0 #define optional_lite_PATCH 0
#define optional_lite_VERSION optional_STRINGIFY(optional_lite_MAJOR) "." optional_STRINGIFY(optional_lite_MINOR) "." optional_STRINGIFY(optional_lite_PATCH) #define optional_lite_VERSION optional_STRINGIFY(optional_lite_MAJOR) "." optional_STRINGIFY(optional_lite_MINOR) "." optional_STRINGIFY(optional_lite_PATCH)
@ -26,6 +26,20 @@
#define optional_OPTIONAL_NONSTD 1 #define optional_OPTIONAL_NONSTD 1
#define optional_OPTIONAL_STD 2 #define optional_OPTIONAL_STD 2
// tweak header support:
#ifdef __has_include
# if __has_include(<nonstd/optional.tweak.hpp>)
# include <nonstd/optional.tweak.hpp>
# endif
#define optional_HAVE_TWEAK_HEADER 1
#else
#define optional_HAVE_TWEAK_HEADER 0
//# pragma message("optional.hpp: Note: Tweak header not supported.")
#endif
// optional selection and configuration:
#if !defined( optional_CONFIG_SELECT_OPTIONAL ) #if !defined( optional_CONFIG_SELECT_OPTIONAL )
# define optional_CONFIG_SELECT_OPTIONAL ( optional_HAVE_STD_OPTIONAL ? optional_OPTIONAL_STD : optional_OPTIONAL_NONSTD ) # define optional_CONFIG_SELECT_OPTIONAL ( optional_HAVE_STD_OPTIONAL ? optional_OPTIONAL_STD : optional_OPTIONAL_NONSTD )
#endif #endif
@ -33,7 +47,10 @@
// Control presence of exception handling (try and auto discover): // Control presence of exception handling (try and auto discover):
#ifndef optional_CONFIG_NO_EXCEPTIONS #ifndef optional_CONFIG_NO_EXCEPTIONS
# if defined(__cpp_exceptions) || defined(__EXCEPTIONS) || defined(_CPPUNWIND)
# if _MSC_VER
# include <cstddef> // for _HAS_EXCEPTIONS
# endif
# if defined(__cpp_exceptions) || defined(__EXCEPTIONS) || (_HAS_EXCEPTIONS)
# define optional_CONFIG_NO_EXCEPTIONS 0 # define optional_CONFIG_NO_EXCEPTIONS 0
# else # else
# define optional_CONFIG_NO_EXCEPTIONS 1 # define optional_CONFIG_NO_EXCEPTIONS 1
@ -293,18 +310,28 @@ namespace nonstd {
#define optional_CPP11_140 (optional_CPP11_OR_GREATER_ || optional_COMPILER_MSVC_VER >= 1900) #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_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_CPP14_000 (optional_CPP14_OR_GREATER)
#define optional_CPP17_000 (optional_CPP17_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: // Presence of C++11 language features:
#define optional_HAVE_CONSTEXPR_11 optional_CPP11_140 #define optional_HAVE_CONSTEXPR_11 optional_CPP11_140
#define optional_HAVE_IS_DEFAULT optional_CPP11_140 #define optional_HAVE_IS_DEFAULT optional_CPP11_140
#define optional_HAVE_NOEXCEPT optional_CPP11_140 #define optional_HAVE_NOEXCEPT optional_CPP11_140
#define optional_HAVE_NULLPTR optional_CPP11_100 #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 #define optional_HAVE_INITIALIZER_LIST optional_CPP11_140
// Presence of C++14 language features: // Presence of C++14 language features:
@ -324,6 +351,13 @@ namespace nonstd {
#define optional_HAVE_TR1_TYPE_TRAITS (!! optional_COMPILER_GNUC_VERSION ) #define optional_HAVE_TR1_TYPE_TRAITS (!! optional_COMPILER_GNUC_VERSION )
#define optional_HAVE_TR1_ADD_POINTER (!! 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: // C++ feature usage:
#if optional_HAVE( CONSTEXPR_11 ) #if optional_HAVE( CONSTEXPR_11 )
@ -419,6 +453,12 @@ namespace nonstd { namespace optional_lite {
namespace std11 { 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 #if optional_CPP11_OR_GREATER
using std::move; using std::move;
#else #else
@ -432,16 +472,42 @@ namespace std11 {
template< typename T, typename F > struct conditional<false, T, F> { typedef F type; }; template< typename T, typename F > struct conditional<false, T, F> { typedef F type; };
#endif // optional_HAVE_CONDITIONAL #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 #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_copy_constructible;
using std::is_trivially_move_constructible;
#else
template< class T > struct is_trivially_copy_constructible : std11::true_type{};
#endif #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 #endif
} // namespace std11 } // namespace std11
#if optional_CPP11_OR_GREATER #if optional_CPP11_OR_GREATER
@ -464,10 +530,10 @@ using std::swap;
struct is_swappable struct is_swappable
{ {
template< typename T, typename = decltype( swap( std::declval<T&>(), std::declval<T&>() ) ) > 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 > template< typename >
static std::false_type test(...);
static std11::false_type test(...);
}; };
struct is_nothrow_swappable struct is_nothrow_swappable
@ -481,10 +547,10 @@ struct is_nothrow_swappable
} }
template< typename T > 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 > template< typename >
static auto test(...) -> std::false_type;
static auto test(...) -> std11::false_type;
}; };
} // namespace detail } // namespace detail
@ -712,6 +778,12 @@ union storage_t
::new( value_ptr() ) value_type( std::move( v ) ); ::new( value_ptr() ) value_type( std::move( v ) );
} }
template< class... Args >
storage_t( nonstd_lite_in_place_t(T), Args&&... args )
{
emplace( std::forward<Args>(args)... );
}
template< class... Args > template< class... Args >
void emplace( Args&&... args ) void emplace( Args&&... args )
{ {
@ -891,13 +963,13 @@ public:
// 3 (C++11) - move-construct from optional // 3 (C++11) - move-construct from optional
template< typename U = T template< typename U = T
optional_REQUIRES_T( optional_REQUIRES_T(
std::is_move_constructible<U>::value
std11::is_move_constructible<U>::value
|| std11::is_trivially_move_constructible<U>::value || std11::is_trivially_move_constructible<U>::value
) )
> >
optional_constexpr14 optional( optional && other ) optional_constexpr14 optional( optional && other )
// NOLINTNEXTLINE( performance-noexcept-move-constructor ) // 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() ) : has_value_( other.has_value() )
{ {
if ( other.has_value() ) if ( other.has_value() )
@ -1043,7 +1115,7 @@ public:
> >
optional_constexpr explicit optional( U && value ) optional_constexpr explicit optional( U && value )
: has_value_( true ) : has_value_( true )
, contained( T{ std::forward<U>( value ) } )
, contained( nonstd_lite_in_place(T), std::forward<U>( value ) )
{} {}
// 8b (C++11) - non-explicit move construct from value // 8b (C++11) - non-explicit move construct from value
@ -1058,7 +1130,7 @@ public:
// NOLINTNEXTLINE( google-explicit-constructor, hicpp-explicit-conversions ) // NOLINTNEXTLINE( google-explicit-constructor, hicpp-explicit-conversions )
optional_constexpr /*non-explicit*/ optional( U && value ) optional_constexpr /*non-explicit*/ optional( U && value )
: has_value_( true ) : has_value_( true )
, contained( std::forward<U>( value ) )
, contained( nonstd_lite_in_place(T), std::forward<U>( value ) )
{} {}
#else // optional_CPP11_OR_GREATER #else // optional_CPP11_OR_GREATER
@ -1101,8 +1173,8 @@ public:
) )
operator=( optional const & other ) operator=( optional const & other )
noexcept( 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 #else
optional & operator=( optional const & other ) optional & operator=( optional const & other )
@ -1121,7 +1193,7 @@ public:
optional_REQUIRES_R( optional_REQUIRES_R(
optional &, optional &,
true true
// std::is_move_constructible<T>::value
// std11::is_move_constructible<T>::value
// && std::is_move_assignable<T>::value // && std::is_move_assignable<T>::value
) )
operator=( optional && other ) noexcept operator=( optional && other ) noexcept
@ -1138,7 +1210,7 @@ public:
optional_REQUIRES_R( optional_REQUIRES_R(
optional &, optional &,
std::is_constructible<T , U>::value 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, nonstd_lite_in_place_t(U)>::value
&& !std::is_same<typename std20::remove_cvref<U>::type, optional<T>>::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) && !(std::is_scalar<T>::value && std::is_same<T, typename std::decay<U>::type>::value)
@ -1176,7 +1248,7 @@ public:
optional_REQUIRES_R( optional_REQUIRES_R(
optional&, optional&,
std::is_constructible< T , U const &>::value 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> && >::value && !std::is_constructible<T, optional<U> && >::value
&& !std::is_constructible<T, optional<U> const & >::value && !std::is_constructible<T, optional<U> const & >::value
@ -1185,10 +1257,10 @@ public:
&& !std::is_convertible< optional<U> && , T>::value && !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_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 #else
optional& optional&
@ -1206,7 +1278,7 @@ public:
optional_REQUIRES_R( optional_REQUIRES_R(
optional&, optional&,
std::is_constructible< T , U>::value 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> && >::value && !std::is_constructible<T, optional<U> && >::value
&& !std::is_constructible<T, optional<U> const & >::value && !std::is_constructible<T, optional<U> const & >::value
@ -1215,10 +1287,10 @@ public:
&& !std::is_convertible< optional<U> && , T>::value && !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_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 ) operator=( optional<U> && other )
{ {
@ -1260,7 +1332,7 @@ public:
void swap( optional & other ) void swap( optional & other )
#if optional_CPP11_OR_GREATER #if optional_CPP11_OR_GREATER
noexcept( noexcept(
std::is_nothrow_move_constructible<T>::value
std11::is_nothrow_move_constructible<T>::value
&& std17::is_nothrow_swappable<T>::value && std17::is_nothrow_swappable<T>::value
) )
#endif #endif
@ -1626,7 +1698,7 @@ inline optional_constexpr bool operator>=( U const & v, optional<T> const & x )
template< typename T template< typename T
#if optional_CPP11_OR_GREATER #if optional_CPP11_OR_GREATER
optional_REQUIRES_T( optional_REQUIRES_T(
std::is_move_constructible<T>::value
std11::is_move_constructible<T>::value
&& std17::is_swappable<T>::value ) && std17::is_swappable<T>::value )
#endif #endif
> >

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