std::btowc – std::btowc Synopsis Defined in header<cwchar> std::wint_t btowc(int c); Widens a single-byte character c to its wide character equivalent. Most multibyte character encodings use single-byte codes to represent the characters from the ASCII character set. This function may be used to convert such characters to wchar_t. Parameters c – single-byte character to widen Return…
std::bsearch – std::bsearch Synopsis Defined in header<cstdlib> void *bsearch(const void *key, const void *ptr, std::size_t count, std::size_t size, /*compare-pred*/ *comp); (1) void *bsearch(const void *key, const void *ptr, std::size_t count, std::size_t size, /*c-compare-pred*/ *comp); extern "C++" using /*compare-pred*/ = int(const void *, const void *); // exposition-only (2) extern "C" using /*c-compare-pred*/ = int(const void…
std::boyer_moore_searcher – std::boyer_moore_searcher Synopsis Defined in header <functional> template< class RandomIt1, class Hash = std::hash<typename std::iterator_traits<RandomIt1>::value_type>, (since C++17) class BinaryPredicate = std::equal_to<> > class boyer_moore_searcher; A searcher suitable for use with the Searcher overload of std::search that implements the Boyer-Moore_string_searching_algorithm. boyer_moore_searcher is CopyConstructible and CopyAssignable. RandomIt1 must meet the requirements of LegacyRandomAccessIterator. Member functions std::boyer_moore_searcher::boyer_moore_searcher…
std::boyer_moore_horspool_searcher – std::boyer_moore_horspool_searcher Synopsis Defined in header <functional> template< class RandomIt1, class Hash = std::hash<typename std::iterator_traits<RandomIt1>::value_type>, (since C++17) class BinaryPredicate = std::equal_to<> > class boyer_moore_horspool_searcher; A searcher suitable for use with the Searcher overload of std::search that implements the Boyer-Moore-Horspool_string_searching_algorithm. boyer_moore_horspool_searcher is CopyConstructible and CopyAssignable. RandomIt1 must meet the requirements of LegacyRandomAccessIterator. Member functions std::boyer_moore_horspool_searcher::boyer_moore_horspool_searcher…
std::boolalpha,std::noboolalpha – std::boolalpha,std::noboolalpha Synopsis Defined in header <ios> std::ios_base& boolalpha( std::ios_base& str ); (1) std::ios_base& noboolalpha( std::ios_base& str ); (2) 1) Enables the boolalpha flag in the stream str as if by calling str.setf(std::ios_base::boolalpha) 2) Disables the boolalpha flag in the stream str as if by calling str.unsetf(std::ios_base::boolalpha) std::boolalpha is an I/O manipulator, so it…
std::bitset<N>::to_ulong – std::bitset<N>::to_ulong Synopsis unsigned long to_ulong() const Converts the contents of the bitset to an unsigned long integer. The first bit of the bitset corresponds to the least significant digit of the number and the last bit corresponds to the most significant digit. Parameters (none) Return value the converted integer Exceptions throws std::overflow_error if…
std::bitset<N>::to_ullong – std::bitset<N>::to_ullong Synopsis unsigned long long to_ullong() const (since C++11) Converts the contents of the bitset to an unsigned long long integer. The first bit of the bitset corresponds to the least significant digit of the number and the last bit corresponds to the most significant digit. Parameters (none) Return value the converted integer…
std::bitset<N>::to_string – std::bitset<N>::to_string Synopsis template < class CharT, class Traits, (until C++ 11) class Alloc > std::basic_string<CharT, Traits, Allocator> to_string() const; template < class CharT = char, class Traits = std::char_traits<CharT>, (since C++ 11) class Allocator = std::allocator<CharT> > std::basic_string<CharT, Traits, Allocator> to_string(CharT zero = CharT(‘0’), CharT one = CharT(‘1’)) const; Converts the contents of…
std::bitset<N>::test – std::bitset<N>::test Synopsis bool test(size_t pos) const; Returns the value of the bit at the position pos. Unlike operator[], performs a bounds check and throws std::out_of_range if pos does not correspond to a valid position in the bitset. Parameters pos – position of the bit to return Return value true if the requested bit…
std::bitset<N>::size – std::bitset<N>::size Synopsis std::size_t size() const; (until C++11) constexpr std::size_t size() const noexcept; (since C++11) Returns the number of bits that the bitset can hold. Parameters (none) Return value number of bits that the bitset can hold, i.e. the template parameter N See also returns the number of bits set to true count (public…
std::bitset<N>::set – std::bitset<N>::set Synopsis bitset<N>& set(); (until C++11) bitset<N>& set() noexcept; (1) (since C++11) bitset<N>& set( std::size_t pos, bool value = true ); (2) Sets all bits to true or to specified value. 1) Sets all bits to true. 2) Sets the bit at position pos to the value value. Parameters pos – the position…
std::bitset<N>::reset – std::bitset<N>::reset Synopsis bitset<N>& reset(); (until C++11) bitset<N>& reset() noexcept; (1) (since C++11) bitset<N>& reset( std::size_t pos ); (2) Sets bits to false. 1) Sets all bits to false 2) Sets the bit at position pos to false. Parameters pos – the position of the bit to set Return value *this Exceptions 2) Throws…
std::bitset<N>::reference – std::bitset<N>::reference Synopsis class reference; The std::bitset class includes std::bitset::reference as a publicly-accessible nested class. This class is used as a proxy object to allow users to interact with individual bits of a bitset, since standard C++ types (like references and pointers) are not built with enough precision to specify individual bits. The primary…
std::bitset<N>::operator[] – std::bitset<N>::operator[] Synopsis bool operator[]( std::size_t pos ) const; (until C++11) constexpr bool operator[]( std::size_t pos ) const; (1) (since C++11) reference operator[]( std::size_t pos ); (2) Accesses the bit at position pos. The first version returns the value of the bit, the second version returns an object of type std::bitset::reference that allows modification…
std::bitset<N>::flip – std::bitset<N>::flip Synopsis bitset<N>& flip(); (until C++11) bitset<N>& flip() noexcept; (1) (since C++11) bitset<N>& flip( std::size_t pos ); (2) Flips bits, i.e. changes true values to false and false values to true. Equivalent to a logical NOT operation on part or all of the bitset. 1) Flips all bits (like operator~, but in-place) 2)…
std::bitset<N>::count – std::bitset<N>::count Synopsis std::size_t count() const; (until C++11) std::size_t count() const noexcept; (since C++11) Returns the number of bits that are set to true. Parameters (none) Return value number of bits that are set to true. Example // Run this code #include <iostream> #include <bitset> int main() { std::bitset<8> b("00010010"); std::cout << "initial value:…
std::bitset<N>::bitset – std::bitset<N>::bitset Synopsis bitset(); (until C++ 11) constexpr bitset() noexcept; (since C++ 11) bitset(unsigned long val); (until C++ 11) constexpr bitset(unsigned long long val) noexcept; (since C++ 11) template <class CharT, class Traits, class Alloc> explicit bitset(const std::basic_string<CharT, Traits, Alloc> &str, typename std::basic_string<CharT, Traits, Alloc>::size_type(until C++ 11) pos = 0, typename std::basic_string<CharT, Traits, Alloc>::size_type…
std::bitset<N>::all,std::bitset<N>::any,std::bitset<N>::none – std::bitset<N>::all,std::bitset<N>::any,std::bitset<N>::none Synopsis bool all() const noexcept; (1) (since C++11) bool any() const; (until C++11) bool any() const noexcept; (2) (since C++11) bool none() const; (3) (until C++11) bool none() const noexcept; (since C++11) Checks if all, any or none of the bits are set to true. 1) Checks if all bits are set…
std::bitset – std::bitset Synopsis Defined in header <bitset> template< std::size_t N > class bitset; The class template bitset represents a fixed-size sequence of N bits. Bitsets can be manipulated by standard logic operators and converted to and from strings and integers. bitset meets the requirements of CopyConstructible and CopyAssignable. Template parameters N – the number…
std::bit_xor<void> – std::bit_xor<void> Synopsis Defined in header<functional> template <> (since C++ 14) class bit_xor<void>; std::bit_xor<> is a specialization of std::bit_xor 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::bit_xor<>::operator() template< class T, class U> constexpr auto…