Linux Manuals session 3

std::round,std::roundf,std::roundl,std::lround,std::lroundf,std::lroundl,std::llround,std::llroundf – std::round,std::roundf,std::roundl,std::lround,std::lroundf,std::lroundl,std::llround,std::llroundf Synopsis Defined in header <cmath> float round ( float arg ); (1) (since C++11) float roundf( float arg ); double round ( double arg ); (2) (since C++11) long double round ( long double arg ); (3) (since C++11) long double roundl( long double arg ); double round ( IntegralType arg );…

std::round,std::roundf,std::roundl,std::lround,std::lroundf,std::lroundl, – std::round,std::roundf,std::roundl,std::lround,std::lroundf,std::lroundl, Synopsis Defined in header <cmath> float round ( float arg );              (1)  (since C++11) float roundf( float arg ); double round ( double arg );            (2)  (since C++11) long double round ( long double arg );  (3)  (since C++11) long double roundl( long double arg ); double round ( IntegralType arg );      (4)  (since C++11) long lround ( float arg );              (5)  (since C++11) long lroundf( float arg ); long lround ( double arg );             (6)  (since C++11) long lround ( long double arg );        (7)  (since C++11) long lroundl( long double arg ); long lround ( IntegralType…

std::rotate_copy – std::rotate_copy Synopsis Defined in header <algorithm> template< class ForwardIt, class OutputIt > OutputIt rotate_copy( ForwardIt first, ForwardIt n_first, (until C++20) ForwardIt last, OutputIt d_first ); template< class ForwardIt, class OutputIt > constexpr OutputIt rotate_copy( ForwardIt first, ForwardIt n_first, (1) (since C++20) ForwardIt last, OutputIt d_first ); template< class ExecutionPolicy, class ForwardIt1, class ForwardIt2…

std::rotate – std::rotate Synopsis Defined in header<algorithm> template <class ForwardIt> (until C++ 11) void rotate(ForwardIt first, ForwardIt n_first, ForwardIt last); template <class ForwardIt> (since C++ 11) ForwardIt rotate(ForwardIt first, ForwardIt n_first, ForwardIt last); (until C++ 20) template <class ForwardIt> (1)(since C++ 20) constexpr ForwardIt rotate(ForwardIt first, ForwardIt n_first, ForwardIt last); template <class ExecutionPolicy, class ForwardIt>…

std::rint,std::rintf,std::rintl,std::lrint,std::lrintf,std::lrintl,std::llrint,std::llrintf – std::rint,std::rintf,std::rintl,std::lrint,std::lrintf,std::lrintl,std::llrint,std::llrintf Synopsis Defined in header <cmath> float rint ( float arg ); (1) (since C++11) float rintf( float arg ); double rint ( double arg ); (2) (since C++11) long double rint ( long double arg ); (3) (since C++11) long double rintl( long double arg ); double rint ( IntegralType arg );…

std::rint,std::rintf,std::rintl,std::lrint,std::lrintf,std::lrintl,std::llrint, – std::rint,std::rintf,std::rintl,std::lrint,std::lrintf,std::lrintl,std::llrint, Synopsis Defined in header <cmath> float rint ( float arg );              (1)  (since C++11) float rintf( float arg ); double rint ( double arg );            (2)  (since C++11) long double rint ( long double arg );  (3)  (since C++11) long double rintl( long double arg ); double rint ( IntegralType arg );      (4)  (since C++11) long lrint ( float arg );              (5)  (since C++11) long lrintf( float arg ); long lrint ( double arg );             (6)  (since C++11) long lrint ( long double arg );        (7)  (since C++11) long lrintl( long double arg ); long lrint ( IntegralType…

std::riemann_zeta,std::riemann_zetaf,std::riemann_zetal – std::riemann_zeta,std::riemann_zetaf,std::riemann_zetal Synopsis double riemann_zeta( double arg ); float riemann_zeta( float arg ); long double riemann_zeta( long double arg ); (1) (since C++17) float riemann_zetaf( float arg ); long double riemann_zetal( long double arg ); double riemann_zeta( IntegralType arg ); (2) (since C++17) 1) Computes the Riemann_zeta_function of arg. 2) A set of overloads…

std::rewind – std::rewind Synopsis Defined in header<cstdio> void rewind(std::FILE *stream); Moves the file position indicator to the beginning of the given file stream. The function is equivalent to std::fseek(stream, 0, SEEK_SET);, except that end-of-file and error indicators are cleared. The function drops any effects from previous calls to ungetc. Parameters stream – file stream to…

std::reverse_iterator<Iter>::reverse_iterator – std::reverse_iterator<Iter>::reverse_iterator Synopsis reverse_iterator(); (until C++ 17) constexpr reverse_iterator(); (since C++ 17) explicit reverse_iterator(iterator_type x); (until C++ 17) constexpr explicit reverse_iterator(iterator_type x); (1)(since C++ 17) template <class U> (2)(until C++ 17) reverse_iterator(const reverse_iterator<U> &other); (3) template <class U> (since C++ 17) constexpr reverse_iterator(const reverse_iterator<U> &other); Constructs a new iterator adaptor. 1) Default constructor. The…

std::reverse_iterator<Iter>::operator[] – std::reverse_iterator<Iter>::operator[] Synopsis /*unspecified*/ operator[]( difference_type n ) const; (until C++17) constexpr /*unspecified*/ operator[]( difference_type n ) const; (since C++17) Returns a reference to the element at specified relative location. Parameters n – position relative to current location. Return value A reference to the element at relative location, that is, base()[-n-1]. Examples  This section…

std::reverse_iterator<Iter>::base – std::reverse_iterator<Iter>::base Synopsis iterator_type base() const; (until C++17) constexpr iterator_type base() const; (since C++17) Returns the underlying base iterator. That is std::reverse_iterator(it).base() == it. The base iterator refers to the element that is next (from the std::reverse_iterator::iterator_type perspective) to the element the reverse_iterator is currently pointing to. That is &*(rit.base() – 1) == &*rit….

std::reverse_iterator – std::reverse_iterator Synopsis Defined in header <iterator> template< class Iter > class reverse_iterator : public std::iterator< typename std::iterator_traits<Iter>::iterator_category, typename std::iterator_traits<Iter>::value_type, (until C++17) typename std::iterator_traits<Iter>::difference_type, typename std::iterator_traits<Iter>::pointer, typename std::iterator_traits<Iter>::reference > template< class Iter > (since C++17) class reverse_iterator; std::reverse_iterator is an iterator adaptor that reverses the direction of a given iterator. In other words, when…

std::reverse_copy – std::reverse_copy Synopsis Defined in header<algorithm> template <class BidirIt, class OutputIt> (until C++ 20) OutputIt reverse_copy(BidirIt first, BidirIt last, OutputIt d_first); template <class BidirIt, class OutputIt> (1)(since C++ 20) constexpr OutputIt reverse_copy(BidirIt first, BidirIt last, OutputIt d_first); template <class ExecutionPolicy, class BidirIt, class ForwardIt> (2)(since C++ 17) ForwardIt reverse_copy(ExecutionPolicy &&policy, BidirIt first, BidirIt last,…

std::reverse – std::reverse Synopsis Defined in header<algorithm> template <class BidirIt> (until C++ 20) void reverse(BidirIt first, BidirIt last); template <class BidirIt> (1)(since C++ 20) constexpr void reverse(BidirIt first, BidirIt last); template <class ExecutionPolicy, class BidirIt> (2)(since C++ 17) void reverse(ExecutionPolicy &&policy, BidirIt first, BidirIt last); 1) Reverses the order of the elements in the range…

std::return_temporary_buffer – std::return_temporary_buffer Synopsis Defined in header <memory> template< class T > (deprecated in C++17) void return_temporary_buffer( T* p ); (removed in C++20) Deallocates storage previously allocated with std::get_temporary_buffer. Parameters p – the pointer previously returned by std::get_temporary_buffer and not invalidated by an earlier call to return_temporary_buffer Return value (none) Exceptions (since C++17) (none) Example…

std::rethrow_if_nested – std::rethrow_if_nested Synopsis Defined in header<exception> template <class E> (since C++ 11) void rethrow_if_nested(const E &e); If E is not a polymorphic class type, or if std::nested_exception is an inaccessible or ambiguous base class of E, there is no effect. Otherwise, performs if (auto p = dynamic_cast<const std::nested_exception *>(std::addressof(e))) p->rethrow_nested(); Parameters e – the…

std::rethrow_exception – std::rethrow_exception Synopsis Defined in header <exception> [[noreturn]] void rethrow_exception( std::exception_ptr p ) (since C++11) Throws the previously captured exception object, referred to by the exception pointer p. Parameters p – non-null std::exception_ptr Return value (none) Example // Run this code #include <iostream> #include <string> #include <exception> #include <stdexcept> void handle_eptr(std::exception_ptr eptr) // passing…

std::result_of< _Signature > – Synopsis Detailed Description template<typename _Signature>class std::result_of< _Signature > result_of Definition at line 1878 of file type_traits. Author Generated automatically by Doxygen for libstdc++ from the source code.

std::result_of,std::invoke_result – std::result_of,std::invoke_result Synopsis Defined in header <type_traits> template< class > class result_of; // not defined (since C++11) (1) (deprecated in C++17) template< class F, class… ArgTypes > (removed in C++20) class result_of<F(ArgTypes…)>; template< class F, class… ArgTypes> (2) (since C++17) class invoke_result; Deduces the return type of an INVOKE expression at compile time. F…

std::resetiosflags – std::resetiosflags Synopsis Defined in header <iomanip> /*unspecified*/ resetiosflags( std::ios_base::fmtflags mask ); When used in an expression out << resetiosflags(mask) or in >> resetiosflags(mask), clears all format flags of the stream out or in as specified by the mask. Parameters mask – bitmask of the flags to clear Return value Returns an object of…