Linux Manuals session 3

std::lognormal_distribution<RealType>::lognormal_distribution – std::lognormal_distribution<RealType>::lognormal_distribution Synopsis lognormal_distribution() : lognormal_distribution(0.0){}(1)(since C++ 11) explicit lognormal_distribution(RealType m, RealType s = 1.0); (2)(since C++ 11) explicit lognormal_distribution(const param_type &params); (3)(since C++ 11) Constructs a new distribution object. (2) uses m and s as the distribution parameters. (3) uses params as the distribution parameters. Parameters m – the m distribution parameter (log-scale)…

std::lognormal_distribution – std::lognormal_distribution Synopsis Defined in header <random> template< class RealType = double > (since C++11) class lognormal_distribution; The lognormal_distribution random number distribution produces random numbers x > 0 according to a log-normal_distribution:       f(x; m,s) =       1       sx       √       2 π       exp⎛       ⎜       ⎝-       (ln x – m)2       2s2       ⎞       ⎟       ⎠ The parameters m…

std::logical_or<void> – std::logical_or<void> Synopsis Defined in header<functional> template <> (since C++ 14) class logical_or<void>; std::logical_or<> is a specialization of std::logical_or with parameter and return type deduced. Member types Member type Definition is_transparent /* unspecified */ Member functions            applies operator|| to lhs and rhs operator() (public member function)  std::logical_or<>::operator() template< class T, class U> constexpr auto…

std::logical_not<void> – std::logical_not<void> Synopsis Defined in header<functional> template <> (since C++ 14) class logical_not<void>; std::logical_not<> is a specialization of std::logical_not with parameter and return type deduced. Member types Member type Definition is_transparent /* unspecified */ Member functions            applies operator! to its argument operator() (public member function)  std::logical_not<>::operator() template< class T > constexpr auto operator()( T&&…

std::logical_and<void> – std::logical_and<void> Synopsis Defined in header<functional> template <> (since C++ 14) class logical_and<void>; std::logical_and<> is a specialization of std::logical_and with parameter and return type deduced. Member types Member type Definition is_transparent /* unspecified */ Member functions            applies operator&& to lhs and rhs operator() (public member function)  std::logical_and<>::operator() template< class T, class U> constexpr auto…

std::logic_error – std::logic_error Synopsis Defined in header <stdexcept> class logic_error; Defines a type of object to be thrown as exception. It reports errors that are a consequence of faulty logic within the program such as violating logical preconditions or class invariants and may be preventable. No standard library components throw this exception directly, but the…

std::logb,std::logbf,std::logbl – std::logb,std::logbf,std::logbl Synopsis Defined in header <cmath> float logb ( float arg ); (1) (since C++11) float logbf( float arg ); double logb ( double arg ); (2) (since C++11) long double logb ( long double arg ); (3) (since C++11) long double logbl( long double arg ); double logb ( IntegralType arg );…

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…