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::log(std::complex) – std::log(std::complex) Synopsis Defined in header<complex> template <class T> complex<T> log(const complex<T> &z); Computes complex natural (base e) logarithm of a complex value z with a branch cut along the negative real axis. Parameters z – complex value Return value If no errors occur, the complex natural logarithm of z is returned, in the…
std::lock_guard<Mutex>::~lock_guard – std::lock_guard<Mutex>::~lock_guard Synopsis ~lock_guard(); (since C++11) Releases the ownership of the owned mutex. Effectively calls m.unlock() where m is the mutex passed to the lock_guard’s constructor.
std::lock_guard – std::lock_guard Synopsis Defined in header <mutex> template< class Mutex > class lock_guard; The class lock_guard is a mutex wrapper that provides a convenient RAII-style mechanism for owning a mutex for the duration of a scoped block. When a lock_guard object is created, it attempts to take ownership of the mutex it is given….
std::lock – std::lock Synopsis Defined in header<mutex> template <class Lockable1, class Lockable2, class… LockableN> (since C++ 11) void lock(Lockable1 &lock1, Lockable2 &lock2, LockableN &…lockn); Locks the given Lockable objects lock1, lock2, …, lockn using a deadlock avoidance algorithm to avoid deadlock. The objects are locked by an unspecified series of calls to lock, try_lock, and…
std::localtime – std::localtime Synopsis Defined in header<ctime> std::tm *localtime(const std::time_t *time); Converts given time since epoch as std::time_t value into calendar time, expressed in local time. Parameters time – pointer to a time_t object to convert Return value pointer to a static internal std::tm object on success, or null pointer otherwise. The structure may be…
std::localeconv – std::localeconv Synopsis Defined in header <clocale> std::lconv* localeconv(); The localeconv function obtains a pointer to a static object of type std::lconv, which represents numeric and monetary formatting rules of the current C locale. Parameters (none) Return value Pointer to the current std::lconv object. Notes Modifying the object references through the returned pointer is…
std::locale::id – Synopsis Public Member Functions id () size_t _M_id () const throw () Friends template<typename _Facet > bool has_facet (const locale &) throw () class locale class locale::_Impl template<typename _Facet > const _Facet & use_facet (const locale &) Detailed Description Facet ID class. The ID class provides facets with an index used to identify…
std::locale::facet – Synopsis Inherited by std::__codecvt_abstract_base< _InternT, _ExternT, encoding_state >, std::__codecvt_abstract_base< char, char, mbstate_t >, std::__codecvt_abstract_base< wchar_t, char, mbstate_t >, std::__ctype_abstract_base< wchar_t >, std::__codecvt_abstract_base< _InternT, _ExternT, _StateT >, std::__ctype_abstract_base< _CharT >, std::__moneypunct_cache< _CharT, _Intl >, std::__numpunct_cache< _CharT >, std::__timepunct< _CharT >, std::__timepunct_cache< _CharT >, std::collate< _CharT >, std::ctype< char >, std::messages< _CharT >, std::money_get< _CharT,…
std::locale::operator==,operator!= – std::locale::operator==,operator!= Synopsis Defined in header <locale> bool operator==( const locale& other ) const; (1) bool operator!=( const locale& other ) const; (2) Tests two locales for equality. Named locales are considered equal if their names are equal. Unnamed locales are considered equal if they are copies of each other. Parameters other – a…
std::locale::name – std::locale::name Synopsis Defined in header<locale> std::string name() const; Returns the name of the locale, which is the name by which it is known to the operating system, such as "POSIX" or "en_US.UTF8" or "English_United States.1252". If the locale is not a copy of a system-supplied locale, the string "*" is returned. Return value…
std::locale::~locale – std::locale::~locale Synopsis Defined in header <locale> ~locale(); Non-virtual destructor which decrements reference counts of all facets held by *this. Those facets whose reference count becomes zero are deleted. Return value (none) Exceptions (none) Example This section is incomplete Reason: no example See also constructs a new locale constructor (public member function)
std::locale::id::id – std::locale::id::id Synopsis Defined in header<locale> id(); (1) id(const id &) = delete; (2) 1) default constructor: creates an object of type std::locale::id with implementation-specific content. 2) copy constructor is deleted; std::locale::id is not copyable. Notes Because locales and facets must be available for the IO stream objects with static storage duration, such as…
std::locale::id – std::locale::id Synopsis Defined in header <locale> class locale::id; The class std::locale::id provides implementation-specific identification of a locale facet. Each class derived from std::locale::facet must have a public static member named id of type std::locale::id and each std::locale object maintains a list of facets it implements, indexed by their ids. Facets with the same…
std::locale::global – std::locale::global Synopsis Defined in header<locale> static locale global(const locale &loc); Replaces the global C++ locale with loc, which means all future calls to the std::locale default constructor will now return a copy of loc.If loc has a name, also replaces the C locale as if by std::setlocale(LC_ALL, loc.name().c_str()); .This function is the only…
std::locale::facet::facet – std::locale::facet::facet Synopsis Defined in header<locale> explicit facet(std::size_t refs = 0); (1) facet(const facet &) = delete; (2) 1) creates a facet with starting reference count refs. If refs is non-zero, the facet will not be deleted when the last locale referencing it goes out of scope. A facet with static or dynamic storage…
std::locale::facet – std::locale::facet Synopsis Defined in header <locale> class locale::facet; std::locale::facet is the base class for facets. It provides a common base class so that locales could store pointers to the facets they implement in a single indexed container, and it abstracts support for facet reference counting. Whenever a facet is added to a locale,…
std::locale::combine – std::locale::combine Synopsis Defined in header<locale> template <class Facet> locale combine(const locale &other) const; Constructs a locale object which is a copy of *this except for the facet of type Facet, which is copied from other. Return value The new, nameless, locale. Exceptions std::runtime_error if other does not implement Facet Example // Run this…
std::locale::classic – std::locale::classic Synopsis Defined in header<locale> static const locale &classic(); Obtains a reference to the C++ locale that implements the classic "C" locale semantics. This locale, unlike the global locale, cannot be altered. Parameters none Return value Returns a reference to the "C" locale. Notes Some of the standard-required facets, such as the UTF-8/UTF-32…
std::locale – std::locale Synopsis Defined in header <locale> class locale; An object of class std::locale is an immutable indexed set of immutable facets. Each stream object of the C++ input/output library is associated with an std::locale object and uses its facets for parsing and formatting of all data. In addition, a locale object is associated…
std::literals::string_view_literals::operator""sv – std::literals::string_view_literals::operator""sv Synopsis Defined in header <string_view> constexpr string_view operator "" sv(const char* str, size_t len) noexcept; (1) (since C++17) constexpr u8string_view operator "" sv(const char8_t* str, size_t len) noexcept; (2) (since C++20) constexpr u16string_view operator "" sv(const char16_t* str, size_t len) noexcept; (3) (since C++17) constexpr u32string_view operator "" sv(const char32_t* str, size_t…