Defined in header <cmath> float tgamma( float arg ); (1) (since C++11) double tgamma( double arg ); (2) (since C++11) long double tgamma( long double arg ); (3) (since C++11) double tgamma( Integral arg ); (4) (since C++11) 1-3) Computes the gamma function of arg. 4) A set of overloads or a function template accepting an argument of any integral type. Equivalent to 2) (the argument is cast to double). Parameters arg - value of a f

Defined in header <scoped_allocator> template< class OuterAlloc, class... InnerAlloc > class scoped_allocator_adaptor : public OuterAlloc; (since C++11) The std::scoped_allocator_adaptor class template is an allocator which can be used with multilevel containers (vector of sets of lists of tuples of maps, etc). It is instantiated with one outer allocator type OuterAlloc and zero or more inner allocator types InnerAlloc.... A container constructed directly with a scope

The random number library provides classes that generate random and pseudo-random numbers. These classes include: Random number engines (both pseudo-random number generators, which generate integer sequences with a uniform distribution, and true random number generators if available) Random number distributions (e.g. uniform, normal, or poisson distributions) which convert the output of random number engines into various statistical distributions Engines and distributions are designed to

Defined in header <cmath> int fpclassify( float arg ); (1) (since C++11) int fpclassify( double arg ); (2) (since C++11) int fpclassify( long double arg ); (3) (since C++11) int fpclassify( Integral arg ); (4) (since C++11) 1-3) Categorizes floating point value arg into the following categories: zero, subnormal, normal, infinite, NAN, or implementation-defined category. 4) A set of overloads or a function template accepting the from argument of any inte

Defined in header <memory> std::pointer_safety get_pointer_safety(); (since C++11) Obtains the implementation-defined pointer safety model, which is a value of type std::pointer_safety. Parameters (none). Return value The pointer safety used by this implementation. Exceptions noexcept specification: noexcept See also pointer_safety (C++11) lists pointer safety models (class)

Defined in header <locale> template< class CharT > class messages_byname : public std::messages<CharT>; std::messages_byname is a std::messages facet which encapsulates retrieval of strings from message catalogs of the locale specified at its construction. Two specializations are provided by the standard library. Defined in header <locale> std::messages_byname<char> narrow/multibyte message catalog access std::messages_byname<wchar_t>

size_type max_size() const; Returns the maximum number of elements the container is able to hold due to system or library implementation limitations, i.e. std::distance(begin(), end()) for the largest container. Parameters (none). Return value Maximum number of elements. Exceptions (none) (until C++11) noexcept specification: noexcept (since C++11) Complexity Constant. Notes This value is typically equal to std::numeric_limits<size_type>::max(), and reflects the

Defined in header <cwchar> int wmemcmp( const wchar_t* lhs, const wchar_t* rhs, std::size_t count ); Compares the first count wide characters of the wide character arrays pointed to by lhs and rhs. The comparison is done lexicographically. The sign of the result is the sign of the difference between the values of the first pair of wide characters that differ in the arrays being compared. If count is zero, the function does nothing. Parameters lhs, rhs - pointers to

Specifies that a non-static member function is virtual and supports dynamic binding. Syntax virtual function_declaration ; Explanation Virtual functions are member functions whose behavior can be overridden in derived classes. As opposed to non-virtual functions, the overridden behavior is preserved even if there is no compile-time information about the actual type of the class. If a derived class is handled using pointer or reference to the base class, a call to a overridden virt

valarray<T> shift( int count ) const; Returns a new valarray of the same size with elements whose positions are shifted by count elements. The new position of each element is i−count where i is the previous position. The value of shifted in elements is T(). Parameters count - number of positions to shift the elements by Return value The resulting valarray with shifted elements. Notes The function can be implemented with the return type different from std::valarray