Linux Manuals session 3

std::front_insert_iterator – std::front_insert_iterator Synopsis Defined in header<iterator> template <class Container> class front_insert_iterator : public std::iterator<std::output_iterator_tag, (until C++ 17) void, void, void, void> template <class Container> (since C++ 17) class front_insert_iterator; std::front_insert_iterator is an LegacyOutputIterator that prepends elements to a container for which it was constructed. The container’s push_front() member function is called whenever the iterator…

std::from_chars – std::from_chars Synopsis Defined in header<charconv> std::from_chars_result from_chars(const char *first, const char *last, (1)(since C++ 17) /*see below*/ & value, int base = 10); std::from_chars_result from_chars(const char *first, const char *last, float &value, (2)(since C++ 17) std::chars_format fmt = std::chars_format::general); std::from_chars_result from_chars(const char *first, const char *last, double &value, (3)(since C++ 17) std::chars_format fmt…

std::frexp,std::frexpf,std::frexpl – std::frexp,std::frexpf,std::frexpl Synopsis Defined in header <cmath> float frexp ( float arg, int* exp ); float frexpf( float arg, int* exp ); (since C++11) double frexp ( double arg, int* exp ); (1) (2) long double frexp ( long double arg, int* exp ); long double frexpl( long double arg, int* exp ); (3)…

std::freopen – std::freopen Synopsis Defined in header<cstdio> std::FILE *freopen(const char *filename, const char *mode, std::FILE *stream); First, attempts to close the file associated with stream, ignoring any errors. Then, if filename is not null, attempts to open the file specified by filename using mode as if by fopen, and associates that file with the file…

std::free – std::free Synopsis Defined in header<cstdlib> void free(void *ptr); Deallocates the space previously allocated by std::malloc, std::calloc , std::aligned_alloc (since C++17), or std::realloc. If ptr is a null pointer, the function does nothing. The behavior is undefined if the value of ptr does not equal a value returned earlier by std::malloc, std::calloc , std::aligned_alloc…

std::fread – std::fread Synopsis Defined in header<cstdio> std::size_t fread(void *buffer, std::size_t size, std::size_t count, std::FILE *stream); Reads up to count objects into the array buffer from the given input stream stream as if by calling std::fgetc size times for each object, and storing the results, in the order obtained, into the successive positions of buffer,…

std::fputws – std::fputws Synopsis Defined in header<cwchar> int fputws(const wchar_t *str, std::FILE *stream); Writes every wide character from the null-terminated wide string str to the output stream stream, as if by repeatedly executing std::fputwc. The terminating null wide character from str is not written. Parameters str – null-terminated wide string to be written stream –…

std::fputwc – std::fputwc Synopsis Defined in header <cwchar> wint_t fputwc( wchar_t ch, std::FILE* stream ); wint_t putwc( wchar_t ch, std::FILE* stream ); Writes a wide character ch to the given output stream stream. putwc() may be implemented as a macro and may evaluate stream more than once. Parameters ch – wide character to be written…

std::fputs – std::fputs Synopsis Defined in header<cstdio> int fputs(const char *str, std::FILE *stream); Writes every character from the null-terminated string str to the output stream stream, as if by repeatedly executing std::fputc. The terminating null character from str is not written. Parameters str – null-terminated character string to be written stream – output stream Return…

std::fputc,std::putc – std::fputc,std::putc Synopsis Defined in header<cstdio> int fputc(int ch, std::FILE *stream); int putc(int ch, std::FILE *stream); Writes a character ch to the given output stream stream. Internally, the character is converted to unsigned char just before being written. In C, putc() may be implemented as a macro, which is disallowed in C++. Therefore calls…

std::fpos<State>::state – std::fpos<State>::state Synopsis State state() const; (1) void state( State st ); (2) Manages the file position state. 1) Returns the value of the file position state 2) Replaces the file position state with the value of st. For the specializations of std::fpos that are used in the standard library, State is always std::mbstate_t…

std::fpos – std::fpos Synopsis Defined in header <ios> template< class State > class fpos; Specializations of the class template std::fpos identify absolute positions in a stream or in a file. Each object of type fpos holds the byte position in the stream (typically as a private member of type std::streamoff) and the current shift state,…

std::fpclassify – std::fpclassify Synopsis 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( IntegralType arg ); (4) (since C++11) 1-3) Categorizes floating point value arg into the following categories: zero, subnormal, normal, infinite,…

std::forward_list<T,Allocator>::~forward_list – std::forward_list<T,Allocator>::~forward_list Synopsis ~forward_list(); (since C++11) Destructs the container. The destructors of the elements are called and the used storage is deallocated. Note, that if the elements are pointers, the pointed-to objects are not destroyed. Complexity Linear in the size of the container.

std::forward_iterator_tag – Synopsis Inherits std::input_iterator_tag. Inherited by std::bidirectional_iterator_tag. Detailed Description Forward iterators support a superset of input iterator operations. Definition at line 95 of file stl_iterator_base_types.h. Author Generated automatically by Doxygen for libstdc++ from the source code.

std::forward_as_tuple – std::forward_as_tuple Synopsis Defined in header <tuple> template< class… Types > (since C++11) tuple<Types&&…> forward_as_tuple( Types&&… args ) noexcept; (constexpr since C++14) Constructs a tuple of references to the arguments in args suitable for forwarding as an argument to a function. The tuple has rvalue reference data members when rvalues are used as arguments,…

std::forward – std::forward Synopsis Defined in header <utility> template< class T > (1) (since C++11) T&& forward( typename std::remove_reference<T>::type& t ) noexcept; (until C++14) template< class T > (1) (since C++14) constexpr T&& forward( typename std::remove_reference<T>::type& t ) noexcept; template< class T > (2) (since C++11) T&& forward( typename std::remove_reference<T>::type&& t ) noexcept; (until C++14)…

std::for_each_n – std::for_each_n Synopsis Defined in header <algorithm> template< class InputIt, class Size, class UnaryFunction > (since C++17) InputIt for_each_n( InputIt first, Size n, UnaryFunction f ); (until C++20) template< class InputIt, class Size, class UnaryFunction > (1) (since C++20) constexpr InputIt for_each_n( InputIt first, Size n, UnaryFunction f ); template< class ExecutionPolicy, class ForwardIt,…

std::for_each – std::for_each Synopsis Defined in header<algorithm> template <class InputIt, class UnaryFunction> (until C++ 20) UnaryFunction for_each(InputIt first, InputIt last, UnaryFunction f); template <class InputIt, class UnaryFunction> (1)(since C++ 20) constexpr UnaryFunction for_each(InputIt first, InputIt last, UnaryFunction f); template <class ExecutionPolicy, class ForwardIt, class UnaryFunction2> (2)(since C++ 17) void for_each(ExecutionPolicy &&policy, ForwardIt first, ForwardIt last,…

std::fopen – std::fopen Synopsis Defined in header<cstdio> std::FILE *fopen(const char *filename, const char *mode); Opens a file indicated by filename and returns a file stream associated with that file. mode is used to determine the file access mode. Parameters filename – file name to associate the file stream to            null-terminated character string determining file access…