Linux Manuals session 3

std::is_convertible,std::is_nothrow_convertible – std::is_convertible,std::is_nothrow_convertible Synopsis Defined in header<type_traits> template <class From, class To> (1)(since C++ 11) struct is_convertible; template <class From, class To> (2)(since C++ 20) struct is_nothrow_convertible; 1) If the imaginary function definition To test() { return std::declval<From>(); } is well-formed, (that is, either std::declval<From>() can be converted to To using implicit_conversions, or both From…

std::is_constructible< _Tp, _Args > – Synopsis Inherits std::integral_constant< bool,(__is_constructible_impl< _Tp, _Args…>::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, typename… _Args>struct std::is_constructible< _Tp, _Args > is_constructible Definition at line 955 of file type_traits….

std::is_constructible,std::is_trivially_constructible,std::is_nothrow_constructible – std::is_constructible,std::is_trivially_constructible,std::is_nothrow_constructible Synopsis Defined in header<type_traits> template <class T, class… Args> (1)(since C++ 11) struct is_constructible; template <class T, class… Args> (2)(since C++ 11) struct is_trivially_constructible; template <class T, class… Args> (3)(since C++ 11) struct is_nothrow_constructible; 1) If T is an object or reference type and the variable definition T obj(std::declval<Args>()…); is well-formed, provides…

std::is_constant_evaluated – std::is_constant_evaluated Synopsis Defined in header <type_traits> constexpr bool is_constant_evaluated() noexcept; (since C++20) Detects whether the function call occurs within a constant-evaluated context. Returns true if the evaluation of the call occurs within the evaluation of an expression or conversion that is manifestly constant-evaluated; otherwise returns false. The following expressions (including conversions to the…

std::is_const – std::is_const Synopsis Defined in header<type_traits> template <class T> (since C++ 11) struct is_const; If T is a const-qualified type (that is, const, or const volatile), 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_compound – std::is_compound Synopsis Defined in header<type_traits> template <class T> (since C++ 11) struct is_compound; If T is a compound type (that is, array, function, object pointer, function pointer, member object pointer, member function pointer, reference, class, union, or enumeration, including any cv-qualified variants), provides the member constant value equal true. For any other type,…

std::is_class – std::is_class Synopsis Defined in header<type_traits> template <class T> (since C++ 11) struct is_class; Checks whether T is a non-union class type. Provides the member constant value which is equal to true, if T is a class type (but not union). Otherwise, value is equal to false. Template parameters T – a type to…

std::is_bounded_array – std::is_bounded_array Synopsis Defined in header<type_traits> template <class T> (since C++ 20) struct is_bounded_array; Checks whether T is an array type of known bound. Provides the member constant value which is equal to true, if T is an array type of known bound. Otherwise, value is equal to false. Template parameters T – a…

std::is_bind_expression – std::is_bind_expression Synopsis Defined in header<functional> template <class T> (since C++ 11) struct is_bind_expression; If T is the type produced by a call to std::bind, this template is derived from std::true_type. For any other type, this template is derived from std::false_type. This template may be specialized for a user-defined type T to implement UnaryTypeTrait…

std::is_base_of – std::is_base_of Synopsis Defined in header<type_traits> template <class Base, class Derived> (since C++ 11) struct is_base_of; If Derived is derived from Base or if both are the same non-union class (in both cases ignoring cv-qualification), provides the member constant value equal to true. Otherwise value is false. If both Base and Derived are non-union…

std::is_assignable< _Tp, _Up > – Synopsis Inherits std::integral_constant< bool, __is_assignable_helper< _Tp, _Up >::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, typename _Up>struct std::is_assignable< _Tp, _Up > is_assignable Definition at line 1099…

std::is_assignable,std::is_trivially_assignable,std::is_nothrow_assignable – std::is_assignable,std::is_trivially_assignable,std::is_nothrow_assignable Synopsis Defined in header<type_traits> template <class T, class U> (1)(since C++ 11) struct is_assignable; template <class T, class U> (2)(since C++ 11) struct is_trivially_assignable; template <class T, class U> (3)(since C++ 11) struct is_nothrow_assignable; 1) If the expression std::declval<T>() = std::declval<U>() is well-formed in unevaluated context, provides the member constant value equal…

std::is_array – std::is_array Synopsis Defined in header<type_traits> template <class T> (since C++ 11) struct is_array; Checks whether T is an array type. Provides the member constant value which is equal to true, if T is an array type. Otherwise, value is equal to false. Template parameters T – a type to check Helper variable template…

std::is_arithmetic – std::is_arithmetic Synopsis Defined in header<type_traits> template <class T> (since C++ 11) struct is_arithmetic; If T is an arithmetic type (that is, an integral type or a floating-point type) or a cv-qualified version thereof, provides the member constant value equal true. For any other type, value is false. Template parameters T – a type…

std::is_aggregate – std::is_aggregate Synopsis Defined in header<type_traits> template <class T> (since C++ 17) struct is_aggregate; Checks if T is an aggregate_type. The member constant value is equal to true if T is an aggregate type and false otherwise. The behavior is undefined if std::remove_all_extents_t<T> is an incomplete type other than (possibly cv-qualified) void. Template parameters…

std::is_abstract – std::is_abstract Synopsis Defined in header<type_traits> template <class T> (since C++ 11) struct is_abstract; If T is an abstract_class (that is, a non-union class that declares or inherits at least one pure virtual function), provides the member constant value equal true. For any other type, value is false. If T is a non-union class…

std::iota – std::iota Synopsis Defined in header<numeric> template <class ForwardIt, class T> (since C++ 11) void iota(ForwardIt first, ForwardIt last, T value); Fills the range [first, last) with sequentially increasing values, starting with value and repetitively evaluating ++value. Equivalent operation: *(d_first) = value; *(d_first+1) = ++value; *(d_first+2) = ++value; *(d_first+3) = ++value; … Parameters first,…

std::iostream_category – std::iostream_category Synopsis Defined in header <ios> const std::error_category& iostream_category() noexcept; (since C++11) Obtains a reference to the static error category object for iostream errors. The object is required to override the virtual function error_category::name() to return a pointer to the string "iostream". It is used to identify error codes provided in the exceptions…

std::basic_iostream – std::basic_iostream Synopsis Defined in header <istream> template< class CharT, class Traits = std::char_traits<CharT> > class basic_iostream; The class template basic_iostream provides support for high level input/output operations on streams. The supported operations include sequential reading or writing and formatting. This functionality is implemented over the interface provided by the basic_streambuf class. It is…

std::ios_base::failure – Synopsis Inherits std::exception. Public Member Functions failure (const string &__str) throw () virtual const char * what () const throw () Detailed Description These are thrown to indicate problems with io. 27.4.2.1.1 Class ios_base::failure. Definition at line 209 of file ios_base.h. Member Function Documentation virtual const char* std::ios_base::failure::what () const [virtual] Returns a…