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::log2p1 – std::log2p1 Synopsis Defined in header <bit> template< class T > (since C++20) constexpr T log2p1(T x) noexcept; If x is not zero, calculates the number of bits needed to store the value x, that is, \(1 + \lfloor log_2(x) \rfloor\)1 + floor(log 2(x)). If x is zero, returns zero. This overload only participates…
std::log2,std::log2f,std::log2l – std::log2,std::log2f,std::log2l Synopsis Defined in header <cmath> float log2 ( float arg ); (1) (since C++11) float log2f( float arg ); double log2 ( double arg ); (2) (since C++11) long double log2 ( long double arg ); (3) (since C++11) long double log2l( long double arg ); double log2 ( IntegralType arg );…
std::log1p,std::log1pf,std::log1pl – std::log1p,std::log1pf,std::log1pl Synopsis Defined in header <cmath> float log1p ( float arg ); (1) (since C++11) float log1pf( float arg ); double log1p ( double arg ); (2) (since C++11) long double log1p ( long double arg ); (3) (since C++11) long double log1pl( long double arg ); double log1p ( IntegralType arg );…
std::log10,std::log10f,std::log10l – std::log10,std::log10f,std::log10l Synopsis Defined in header <cmath> float log10 ( float arg ); float log10f( float arg ); (since C++11) double log10 ( double arg ); (1) (2) long double log10 ( long double arg ); long double log10l( long double arg ); (3) (since C++11) double log10 ( IntegralType arg ); (4) (since…
std::log10(std::valarray) – std::log10(std::valarray) Synopsis Defined in header<valarray> template <class T> valarray<T> log10(const valarray<T> &va); For each element in va computes common (base 10) logarithm of the value of the element. Parameters va – value array to apply the operation to Return value Value array containing common logarithms of the values in va. Notes Unqualified function…
std::log10(std::complex) – std::log10(std::complex) Synopsis Defined in header<complex> template <class T> complex<T> log10(const complex<T> &z); Computes complex common (base 10) logarithm of a complex value z with a branch cut along the negative real axis. The behavior of this function is equivalent to std::log(z)/std::log(T(10)). Parameters z – complex value Return value Complex common logarithm of z…
std::log,std::logf,std::logl – std::log,std::logf,std::logl Synopsis Defined in header <cmath> float log ( float arg ); float logf( float arg ); (since C++11) double log ( double arg ); (1) (2) long double log ( long double arg ); long double logl( long double arg ); (3) (since C++11) double log ( IntegralType arg ); (4) (since…
std::log(std::valarray) – std::log(std::valarray) Synopsis Defined in header<valarray> template <class T> valarray<T> log(const valarray<T> &va); For each element in va computes natural logarithm of the value of the element. Parameters va – value array to apply the operation to Return value Value array containing natural logarithms of the values in va. Notes Unqualified function (log) is…
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…