Compare two shared_ptr objects template < class T, class U > bool operator==( const shared_ptr<T>& lhs, const shared_ptr<U>& rhs ); (1) (since C++11) template< class T, class U > bool operator!=( const shared_ptr<T>& lhs, const shared_ptr<U>& rhs ); (2) (since C++11) template< class T, class U > bool operator<( const shared_ptr<T>& lhs, const shared_ptr<U>& rhs ); (3) (since C++11) templat

Defined in header <iterator> template< class CharT, class Traits = std::char_traits<CharT> > class ostreambuf_iterator : public std::iterator<std::output_iterator_tag, void, void, void, void> (until C++17) template< class CharT, class Traits = std::char_traits<CharT> > class ostreambuf_iterator; (since C++17) std::ostreambuf_iterator is a single-pass OutputIterator that writes successive ch

Defined in header <regex> template < class CharT, class Traits = std::regex_traits<CharT> > class basic_regex; (since C++11) The class template basic_regex provides a general framework for holding regular expressions. Several specializations for common character types are provided: Defined in header <regex> Type Definition regex basic_regex<char> wregex basic_regex<wchar_t> Member types Member type Definition va

Defined in header <exception> template< class E > std::exception_ptr make_exception_ptr( E e ); (since C++11) Creates an std::exception_ptr that holds a reference to a copy of e. This is done as if executing the following code: try { throw e; } catch(...) { return std::current_exception(); } Parameters (none). Return value An instance of std::exception_ptr holding a reference to the copy of e, or to an instance of std::bad_alloc or to an instance of std:

(1) void erase( iterator pos ); (until C++11) iterator erase( iterator pos ); (since C++17) iterator erase( const_iterator pos ); (since C++11) (2) void erase( iterator first, iterator last ); (until C++11) iterator erase( const_iterator first, const_iterator last ); (since C++11) size_type erase( const key_type& key ); (3) Removes specified elements from the container. 1) Removes the element at pos. 2) Removes the elements in the range [first; last),

Initializes an object from explicit set of constructor arguments. Syntax T object ( arg ); T object ( arg1, arg2, ... ); (1) T object { arg }; T object { arg1, arg2, ... }; (2) (since C++11) T ( other ) T ( arg1, arg2, ... ); (3) static_cast< T >( other ) (4) new T(args, ...) (5) Class::Class() : member(args, ...) {... (6) [arg](){... (7) (since C++11) Explanation Direct initialization is performed in the following situations: 1) in

Allows values of integer type to be used in expressions directly. Syntax An integer literal is a primary expression of the form. decimal-literal integer-suffix(optional) (1) octal-literal integer-suffix(optional) (2) hex-literal integer-suffix(optional) (3) binary-literal integer-suffix(optional) (4) (since C++14) where. decimal-literal is a non-zero decimal digit (1, 2, 3, 4, 5, 6, 7, 8, 9), followed by zero or more decimal digits (0, 1, 2, 3, 4, 5, 6, 7, 8, 9)

T min() const; Computes the minimum value of the elements. If there are no elements, the behavior is undefined. The function can be used only if operator< is defined for type T. Parameters (none). Return value The minimum of the elements. Example See also max returns the largest element (public member function)

regex_traits(); Default-constructs the std::regex_traits object, including default-constructing the private std::locale member or any other internal state as necessary. Parameters (none). Return value (none). Example #include <iostream> #include <regex> int main() { std::locale::global(std::locale("en_US.utf8")); std::regex_traits<char> r1; std::regex_traits<wchar_t> r2; std::cout << "The regex locale is " << r1.getloc().n

const CharT* data() const; Returns pointer to the underlying array serving as character storage. The pointer is such that the range [data(); data() + size()) is valid and the values in it correspond to the values stored in the string. The returned array is not required to be null-terminated. If empty() returns true, the pointer is a non-null pointer that should not be dereferenced. (until C++11) The returned array is null-terminated, that is, data() and c_str() perform the same func