The Linux Manuals (man pages) document is an important part of Linux documents. Linux Manuals are organized as several sections. Each section has a group of commands for a specific area in Linux usage, administration or development.
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…
std::ios_base::xalloc – std::ios_base::xalloc Synopsis static int xalloc(); Returns a unique (program-wide) index value that can be used to access one long and one void* elements in the private storage of std::ios_base by calling iword() and pword(). The call to xalloc does not allocate memory. This function is thread-safe; concurrent access by multiple threads does not…
std::ios_base::width – std::ios_base::width Synopsis streamsize width() const; (1) streamsize width( streamsize new_width ); (2) Manages the minimum number of characters to generate on certain output operations and the maximum number of characters to generate on certain input operations. 1) Returns the current field width. 2) Sets the field width to the given one. Returns the…
std::ios_base::unsetf – std::ios_base::unsetf Synopsis void unsetf(fmtflags flags); Unsets the formatting flags identified by flags. Parameters formatting flags to unset. It can be a combination of the following constants: Constant Explanation dec use decimal base for integer I/O: see std::dec oct use octal base for integer I/O: see std::oct hex use hexadecimal base for integer I/O:…
std::ios_base::sync_with_stdio – std::ios_base::sync_with_stdio Synopsis static bool sync_with_stdio( bool sync = true ); Sets whether the standard C++ streams are synchronized to the standard C streams after each input/output operation. The standard C++ streams are the following: std::cin, std::cout, std::cerr, std::clog, std::wcin, std::wcout, std::wcerr and std::wclog The standard C streams are the following: stdin, stdout and…
std::ios_base::setf – std::ios_base::setf Synopsis fmtflags setf( fmtflags flags ); (1) fmtflags setf( fmtflags flags, fmtflags mask ); (2) Sets the formatting flags to specified settings. 1) Sets the formatting flags identified by flags. Effectively the following operation is performed fl = fl | flags where fl defines the state of internal formatting flags. 2) Clears…
std::ios_base::seekdir – std::ios_base::seekdir Synopsis typedef /*implementation defined*/ seekdir; static constexpr seekdir beg = /*implementation defined*/ static constexpr seekdir end = /*implementation defined*/ static constexpr seekdir cur = /*implementation defined*/ Specifies file seeking direction type. The following constants are defined: Constant Explanation beg the beginning of a stream end the ending of a stream cur the…
std::ios_base::register_callback – std::ios_base::register_callback Synopsis void register_callback(event_callback function, int index); Registers a user-defined function which will be called by imbue(), std::basic_ios::copyfmt() and ~ios_base(). Every registered callback is called every time: the event type (a value of type event) is passed as its first argument, and may be used to distinguish between the callers. The callbacks are…