@ -79,79 +79,72 @@ enum class ord : value_type { less = -1, greater = 1 };
enum class ncmp : value_type { unordered = - 127 } ;
// Define macros to allow for creation or emulation of C++17 inline variables
// based on whether the feature is supported. Note: we can't use
// ABSL_INTERNAL_INLINE_CONSTEXPR here because the variables here are of
// incomplete types so they need to be defined after the types are complete.
# ifdef __cpp_inline_variables
# define ABSL_COMPARE_INLINE_BASECLASS_DECL(name)
# define ABSL_COMPARE_INLINE_SUBCLASS_DECL(type, name) \
static const type name
# define ABSL_COMPARE_INLINE_INIT(type, name, init) \
inline constexpr type type : : name ( init )
# else // __cpp_inline_variables
# define ABSL_COMPARE_INLINE_BASECLASS_DECL(name) \
ABSL_CONST_INIT static const T name
# define ABSL_COMPARE_INLINE_SUBCLASS_DECL(type, name)
# define ABSL_COMPARE_INLINE_INIT(type, name, init) \
template < typename T > \
const T compare_internal : : type # # _base < T > : : name ( init )
# endif // __cpp_inline_variables
// These template base classes allow for defining the values of the constants
// in the header file (for performance) without using inline variables (which
// aren't available in C++11).
template < typename T >
struct weak_equality_base {
ABSL_CONST_INIT static const T equivalent ;
ABSL_CONST_INIT static const T nonequivalent ;
ABSL_COMPARE_INLINE_BASECLASS_DECL ( equivalent ) ;
ABSL_COMPARE_INLINE_BASECLASS_DECL ( nonequivalent ) ;
} ;
template < typename T >
const T weak_equality_base < T > : : equivalent ( eq : : equivalent ) ;
template < typename T >
const T weak_equality_base < T > : : nonequivalent ( eq : : nonequivalent ) ;
template < typename T >
struct strong_equality_base {
ABSL_CONST_INIT static const T equal ;
ABSL_CONST_INIT static const T nonequal ;
ABSL_CONST_INIT static const T equivalent ;
ABSL_CONST_INIT static const T nonequivalent ;
ABSL_COMPARE_INLINE_BASECLASS_DECL ( equal ) ;
ABSL_COMPARE_INLINE_BASECLASS_DECL ( nonequal ) ;
ABSL_COMPARE_INLINE_BASECLASS_DECL ( equivalent ) ;
ABSL_COMPARE_INLINE_BASECLASS_DECL ( nonequivalent ) ;
} ;
template < typename T >
const T strong_equality_base < T > : : equal ( eq : : equal ) ;
template < typename T >
const T strong_equality_base < T > : : nonequal ( eq : : nonequal ) ;
template < typename T >
const T strong_equality_base < T > : : equivalent ( eq : : equivalent ) ;
template < typename T >
const T strong_equality_base < T > : : nonequivalent ( eq : : nonequivalent ) ;
template < typename T >
struct partial_ordering_base {
ABSL_CONST_INIT static const T less ;
ABSL_CONST_INIT static const T equivalent ;
ABSL_CONST_INIT static const T greater ;
ABSL_CONST_INIT static const T unordered ;
ABSL_COMPARE_INLINE_BASECLASS_DECL ( less ) ;
ABSL_COMPARE_INLINE_BASECLASS_DECL ( equivalent ) ;
ABSL_COMPARE_INLINE_BASECLASS_DECL ( greater ) ;
ABSL_COMPARE_INLINE_BASECLASS_DECL ( unordered ) ;
} ;
template < typename T >
const T partial_ordering_base < T > : : less ( ord : : less ) ;
template < typename T >
const T partial_ordering_base < T > : : equivalent ( eq : : equivalent ) ;
template < typename T >
const T partial_ordering_base < T > : : greater ( ord : : greater ) ;
template < typename T >
const T partial_ordering_base < T > : : unordered ( ncmp : : unordered ) ;
template < typename T >
struct weak_ordering_base {
ABSL_CONST_INIT static const T less ;
ABSL_CONST_INIT static const T equivalent ;
ABSL_CONST_INIT static const T greater ;
ABSL_COMPARE_INLINE_BASECLASS_DECL ( less ) ;
ABSL_COMPARE_INLINE_BASECLASS_DECL ( equivalent ) ;
ABSL_COMPARE_INLINE_BASECLASS_DECL ( greater ) ;
} ;
template < typename T >
const T weak_ordering_base < T > : : less ( ord : : less ) ;
template < typename T >
const T weak_ordering_base < T > : : equivalent ( eq : : equivalent ) ;
template < typename T >
const T weak_ordering_base < T > : : greater ( ord : : greater ) ;
template < typename T >
struct strong_ordering_base {
ABSL_CONST_INIT static const T less ;
ABSL_CONST_INIT static const T equal ;
ABSL_CONST_INIT static const T equivalent ;
ABSL_CONST_INIT static const T greater ;
ABSL_COMPARE_INLINE_BASECLASS_DECL ( less ) ;
ABSL_COMPARE_INLINE_BASECLASS_DECL ( equal ) ;
ABSL_COMPARE_INLINE_BASECLASS_DECL ( equivalent ) ;
ABSL_COMPARE_INLINE_BASECLASS_DECL ( greater ) ;
} ;
template < typename T >
const T strong_ordering_base < T > : : less ( ord : : less ) ;
template < typename T >
const T strong_ordering_base < T > : : equal ( eq : : equal ) ;
template < typename T >
const T strong_ordering_base < T > : : equivalent ( eq : : equivalent ) ;
template < typename T >
const T strong_ordering_base < T > : : greater ( ord : : greater ) ;
} // namespace compare_internal
@ -162,6 +155,9 @@ class weak_equality
friend struct compare_internal : : weak_equality_base < weak_equality > ;
public :
ABSL_COMPARE_INLINE_SUBCLASS_DECL ( weak_equality , equivalent ) ;
ABSL_COMPARE_INLINE_SUBCLASS_DECL ( weak_equality , nonequivalent ) ;
// Comparisons
friend constexpr bool operator = = (
weak_equality v , compare_internal : : OnlyLiteralZero < > ) noexcept {
@ -183,6 +179,10 @@ class weak_equality
private :
compare_internal : : value_type value_ ;
} ;
ABSL_COMPARE_INLINE_INIT ( weak_equality , equivalent ,
compare_internal : : eq : : equivalent ) ;
ABSL_COMPARE_INLINE_INIT ( weak_equality , nonequivalent ,
compare_internal : : eq : : nonequivalent ) ;
class strong_equality
: public compare_internal : : strong_equality_base < strong_equality > {
@ -191,6 +191,11 @@ class strong_equality
friend struct compare_internal : : strong_equality_base < strong_equality > ;
public :
ABSL_COMPARE_INLINE_SUBCLASS_DECL ( strong_equality , equal ) ;
ABSL_COMPARE_INLINE_SUBCLASS_DECL ( strong_equality , nonequal ) ;
ABSL_COMPARE_INLINE_SUBCLASS_DECL ( strong_equality , equivalent ) ;
ABSL_COMPARE_INLINE_SUBCLASS_DECL ( strong_equality , nonequivalent ) ;
// Conversion
constexpr operator weak_equality ( ) const noexcept { // NOLINT
return value_ = = 0 ? weak_equality : : equivalent
@ -217,6 +222,13 @@ class strong_equality
private :
compare_internal : : value_type value_ ;
} ;
ABSL_COMPARE_INLINE_INIT ( strong_equality , equal , compare_internal : : eq : : equal ) ;
ABSL_COMPARE_INLINE_INIT ( strong_equality , nonequal ,
compare_internal : : eq : : nonequal ) ;
ABSL_COMPARE_INLINE_INIT ( strong_equality , equivalent ,
compare_internal : : eq : : equivalent ) ;
ABSL_COMPARE_INLINE_INIT ( strong_equality , nonequivalent ,
compare_internal : : eq : : nonequivalent ) ;
class partial_ordering
: public compare_internal : : partial_ordering_base < partial_ordering > {
@ -234,6 +246,11 @@ class partial_ordering
}
public :
ABSL_COMPARE_INLINE_SUBCLASS_DECL ( partial_ordering , less ) ;
ABSL_COMPARE_INLINE_SUBCLASS_DECL ( partial_ordering , equivalent ) ;
ABSL_COMPARE_INLINE_SUBCLASS_DECL ( partial_ordering , greater ) ;
ABSL_COMPARE_INLINE_SUBCLASS_DECL ( partial_ordering , unordered ) ;
// Conversion
constexpr operator weak_equality ( ) const noexcept { // NOLINT
return value_ = = 0 ? weak_equality : : equivalent
@ -292,6 +309,13 @@ class partial_ordering
private :
compare_internal : : value_type value_ ;
} ;
ABSL_COMPARE_INLINE_INIT ( partial_ordering , less , compare_internal : : ord : : less ) ;
ABSL_COMPARE_INLINE_INIT ( partial_ordering , equivalent ,
compare_internal : : eq : : equivalent ) ;
ABSL_COMPARE_INLINE_INIT ( partial_ordering , greater ,
compare_internal : : ord : : greater ) ;
ABSL_COMPARE_INLINE_INIT ( partial_ordering , unordered ,
compare_internal : : ncmp : : unordered ) ;
class weak_ordering
: public compare_internal : : weak_ordering_base < weak_ordering > {
@ -302,6 +326,10 @@ class weak_ordering
friend struct compare_internal : : weak_ordering_base < weak_ordering > ;
public :
ABSL_COMPARE_INLINE_SUBCLASS_DECL ( weak_ordering , less ) ;
ABSL_COMPARE_INLINE_SUBCLASS_DECL ( weak_ordering , equivalent ) ;
ABSL_COMPARE_INLINE_SUBCLASS_DECL ( weak_ordering , greater ) ;
// Conversions
constexpr operator weak_equality ( ) const noexcept { // NOLINT
return value_ = = 0 ? weak_equality : : equivalent
@ -365,6 +393,11 @@ class weak_ordering
private :
compare_internal : : value_type value_ ;
} ;
ABSL_COMPARE_INLINE_INIT ( weak_ordering , less , compare_internal : : ord : : less ) ;
ABSL_COMPARE_INLINE_INIT ( weak_ordering , equivalent ,
compare_internal : : eq : : equivalent ) ;
ABSL_COMPARE_INLINE_INIT ( weak_ordering , greater ,
compare_internal : : ord : : greater ) ;
class strong_ordering
: public compare_internal : : strong_ordering_base < strong_ordering > {
@ -375,6 +408,11 @@ class strong_ordering
friend struct compare_internal : : strong_ordering_base < strong_ordering > ;
public :
ABSL_COMPARE_INLINE_SUBCLASS_DECL ( strong_ordering , less ) ;
ABSL_COMPARE_INLINE_SUBCLASS_DECL ( strong_ordering , equal ) ;
ABSL_COMPARE_INLINE_SUBCLASS_DECL ( strong_ordering , equivalent ) ;
ABSL_COMPARE_INLINE_SUBCLASS_DECL ( strong_ordering , greater ) ;
// Conversions
constexpr operator weak_equality ( ) const noexcept { // NOLINT
return value_ = = 0 ? weak_equality : : equivalent
@ -446,6 +484,16 @@ class strong_ordering
private :
compare_internal : : value_type value_ ;
} ;
ABSL_COMPARE_INLINE_INIT ( strong_ordering , less , compare_internal : : ord : : less ) ;
ABSL_COMPARE_INLINE_INIT ( strong_ordering , equal , compare_internal : : eq : : equal ) ;
ABSL_COMPARE_INLINE_INIT ( strong_ordering , equivalent ,
compare_internal : : eq : : equivalent ) ;
ABSL_COMPARE_INLINE_INIT ( strong_ordering , greater ,
compare_internal : : ord : : greater ) ;
# undef ABSL_COMPARE_INLINE_BASECLASS_DECL
# undef ABSL_COMPARE_INLINE_SUBCLASS_DECL
# undef ABSL_COMPARE_INLINE_INIT
namespace compare_internal {
// We also provide these comparator adapter functions for internal absl use.