Section 3: library functions
std::is_sorted – std::is_sorted Synopsis Defined in header <algorithm> template< class ForwardIt > (since C++11) bool is_sorted( ForwardIt first, ForwardIt last ); (until C++20) template< class ForwardIt > (since C++20) constexpr bool is_sorted( ForwardIt first, ForwardIt last ); template< class ExecutionPolicy, class ForwardIt > (2) (since C++17) bool is_sorted( ExecutionPolicy&& policy, ForwardIt first, ForwardIt last );…
std::is_signed – std::is_signed Synopsis Defined in header<type_traits> template <class T> (since C++ 11) struct is_signed; If T is an arithmetic type, provides the member constant value equal true if T(-1) < T(0): this results in true for the floating-point types and the signed integer types, and in false for the unsigned integer types and the…
std::is_scalar – std::is_scalar Synopsis Defined in header<type_traits> template <class T> (since C++ 11) struct is_scalar; If T is a scalar_type (that is a possibly cv-qualified arithmetic, pointer, pointer_to_member, enumeration, or std::nullptr_t type), provides the member constant value equal true. For any other type, value is false. Template parameters T – a type to check Helper…
std::is_same – std::is_same Synopsis Defined in header<type_traits> template <class T, class U> (since C++ 11) struct is_same; If T and U name the same type (including const/volatile qualifications), provides the member constant value equal to true. Otherwise value is false. Commutativity is satisfied, i.e. for any two types T and U, is_same<T, U>::value == true…
std::is_rvalue_reference – std::is_rvalue_reference Synopsis Defined in header<type_traits> template <class T> (since C++ 11) struct is_rvalue_reference; Checks whether T is a rvalue reference type. Provides the member constant value which is equal to true, if T is a rvalue reference type. Otherwise, value is equal to false. Template parameters T – a type to check Helper…
std::is_reference – std::is_reference Synopsis Defined in header<type_traits> template <class T> (since C++ 11) struct is_reference; If T is a reference type (lvalue reference or rvalue reference), provides the member constant value equal true. For any other type, value is false. Template parameters T – a type to check Helper variable template template< class T >…
std::is_polymorphic – std::is_polymorphic Synopsis Defined in header<type_traits> template <class T> (since C++ 11) struct is_polymorphic; If T is a polymorphic_class (that is, a non-union class that declares or inherits at least one virtual function), provides the member constant value equal true. For any other type, value is false. If T is a non-union class type,…
std::is_pointer – std::is_pointer Synopsis Defined in header<type_traits> template <class T> (since C++ 11) struct is_pointer; Checks whether T is a pointer_to_object or a pointer to function (but not a pointer to member/member function). Provides the member constant value which is equal to true, if T is a object/function pointer type. Otherwise, value is equal to…
std::is_pod – std::is_pod Synopsis Defined in header <type_traits> template< class T > (since C++11) struct is_pod; (deprecated in C++20) If T is a PODType ("plain old data type"), that is, both trivial and standard-layout, provides the member constant value equal true. For any other type, value is false. The behavior is undefined if std::remove_all_extents_t<T> is…
std::is_placeholder – std::is_placeholder Synopsis Defined in header<functional> template <class T> (since C++ 11) struct is_placeholder; If T is the type of a standard placeholder (_1, _2, _3, …), then this template is derived from std::integral_constant<int,1>, std::integral_constant<int,2>, std::integral_constant<int,3>, respectively. If T is not a standard placeholder type, this template is derived from std::integral_constant<int,0> The template may…
std::is_permutation – std::is_permutation Synopsis Defined in header <algorithm> template< class ForwardIt1, class ForwardIt2 > (since C++11) bool is_permutation( ForwardIt1 first1, ForwardIt1 last1, (until C++20) ForwardIt2 first2 ); template< class ForwardIt1, class ForwardIt2 > constexpr bool is_permutation( ForwardIt1 first1, ForwardIt1 last1, (since C++20) ForwardIt2 first2 ); template< class ForwardIt1, class ForwardIt2, class BinaryPredicate > (since C++11)…
std::is_partitioned – std::is_partitioned Synopsis Defined in header <algorithm> template< class InputIt, class UnaryPredicate > (since C++11) bool is_partitioned( InputIt first, InputIt last, UnaryPredicate p ); (until C++20) template< class InputIt, class UnaryPredicate > (1) (since C++20) constexpr bool is_partitioned( InputIt first, InputIt last, UnaryPredicate p ); template< class ExecutionPolicy, class ForwardIt, class UnaryPredicate > (2)…
std::is_object – std::is_object Synopsis Defined in header<type_traits> template <class T> (since C++ 11) struct is_object; If T is an object_type (that is any possibly cv-qualified type other than function, reference, or void types), provides the member constant value equal true. For any other type, value is false. Template parameters T – a type to check…
std::is_null_pointer – std::is_null_pointer Synopsis Defined in header<type_traits> template <class T> (since C++ 14) struct is_null_pointer; Checks whether T is the type std::nullptr_t. Provides the member constant value that is equal to true, if T is the type std::nullptr_t, const std::nullptr_t, volatile std::nullptr_t, or const volatile std::nullptr_t. Otherwise, value is equal to false. Template parameters T…
std::is_nothrow_move_constructible< _Tp > – Synopsis Inherits std::__is_nothrow_move_constructible_impl< _Tp, bool >. Detailed Description template<typename _Tp>struct std::is_nothrow_move_constructible< _Tp > is_nothrow_move_constructible Definition at line 1078 of file type_traits. Author Generated automatically by Doxygen for libstdc++ from the source code.
std::is_nothrow_move_assignable< _Tp > – Synopsis Inherits std::__is_nt_move_assignable_impl< _Tp, bool >. Detailed Description template<typename _Tp>struct std::is_nothrow_move_assignable< _Tp > is_nothrow_move_assignable Definition at line 1184 of file type_traits. Author Generated automatically by Doxygen for libstdc++ from the source code.
std::is_nothrow_destructible< _Tp > – Synopsis Inherits std::integral_constant< bool,(__is_nt_destructible_safe< _Tp >::value)>. Public Types typedef integral_constant < bool, __v > type" typedef bool value_type Public Member Functions constexpr operator value_type () Static Public Attributes static constexpr bool value Detailed Description template<typename _Tp>struct std::is_nothrow_destructible< _Tp > is_nothrow_destructible Definition at line 700 of file type_traits. Author Generated automatically by…
std::is_nothrow_default_constructible< _Tp > – Synopsis Inherits type< is_default_constructible< _Tp >, __is_nt_default_constructible_impl< _Tp > >. Inherited by std::__is_nt_constructible_impl< _Tp >. Detailed Description template<typename _Tp>struct std::is_nothrow_default_constructible< _Tp > is_nothrow_default_constructible Definition at line 1018 of file type_traits. Author Generated automatically by Doxygen for libstdc++ from the source code.
std::is_nothrow_copy_constructible< _Tp > – Synopsis Inherits std::__is_nothrow_copy_constructible_impl< _Tp, bool >. Detailed Description template<typename _Tp>struct std::is_nothrow_copy_constructible< _Tp > is_nothrow_copy_constructible Definition at line 1060 of file type_traits. Author Generated automatically by Doxygen for libstdc++ from the source code.
std::is_nothrow_copy_assignable< _Tp > – Synopsis Inherits std::__is_nt_copy_assignable_impl< _Tp, bool >. Detailed Description template<typename _Tp>struct std::is_nothrow_copy_assignable< _Tp > is_nothrow_copy_assignable Definition at line 1166 of file type_traits. Author Generated automatically by Doxygen for libstdc++ from the source code.