Section 3: library functions
std::experimental::any::~any – std::experimental::any::~any Synopsis ~any(); (library fundamentals TS) Destroys the contained object, if any, as if by a call to clear(). See also destroys contained object clear (public member function)
std::experimental::any – std::experimental::any Synopsis Defined in header <experimental/any> class any; (library fundamentals TS) The class any describes a type-safe container for single values of any type. 1) An object of class any stores an instance of any type that satisfies the constructor requirements or is empty, and this is referred to as the state of…
std::exp2,std::exp2f,std::exp2l – std::exp2,std::exp2f,std::exp2l Synopsis Defined in header <cmath> float exp2 ( float n ); (1) (since C++11) float exp2f( float n ); double exp2 ( double n ); (2) (since C++11) long double exp2 ( long double n ); (3) (since C++11) long double exp2l( long double n ); double exp2 ( IntegralType n );…
std::exp,std::expf,std::expl – std::exp,std::expf,std::expl Synopsis Defined in header <cmath> float exp ( float arg ); float expf( float arg ); (since C++11) double exp ( double arg ); (1) (2) long double exp ( long double arg ); long double expl( long double arg ); (3) (since C++11) double exp ( IntegralType arg ); (4) (since…
std::exp(std::valarray) – std::exp(std::valarray) Synopsis Defined in header<valarray> template <class T> valarray<T> exp(const valarray<T> &va); For each element in va computes e raised to the power equal to the value of the element. Parameters va – value array to apply the operation to Return value Value array containing e raised by the values in va. Notes…
std::exp(std::complex) – std::exp(std::complex) Synopsis Defined in header<complex> template <class T> complex<T> exp(const complex<T> &z); Compute base-e exponential of z, that is e (Euler’s number, 2.7182818) raised to the z power. Parameters z – complex value Return value If no errors occur, e raised to the power of z, ez , is returned. Error handling and…
std::exit – std::exit Synopsis Defined in header <cstdlib> void exit( int exit_code ); (until C++11) [[noreturn]] void exit( int exit_code ); (since C++11) Causes normal program termination to occur. Several cleanup steps are performed: 1) destructors of objects with static storage duration are called in reverse order of completion of their constructors or the completion…
std::execution::sequenced_policy,std::execution::parallel_policy,std::execution::parallel_unsequenced_policy,std::execution::unsequenced_policy – std::execution::sequenced_policy,std::execution::parallel_policy,std::execution::parallel_unsequenced_policy,std::execution::unsequenced_policy Synopsis Defined in header <execution> class sequenced_policy { /* unspecified */ }; (1) (since C++17) class parallel_policy { /* unspecified */ }; (2) (since C++17) class parallel_unsequenced_policy { /* unspecified */ }; (3) (since C++17) class unsequenced_policy { /* unspecified */ }; (4) (since C++20) 1) The execution policy type used as…
std::execution::sequenced_policy,std::execution::parallel_policy, – std::execution::sequenced_policy,std::execution::parallel_policy, Synopsis Defined in header <execution> class sequenced_policy { /* unspecified */ }; (1) (since C++17) class parallel_policy { /* unspecified */ }; (2) (since C++17) class parallel_unsequenced_policy { /* unspecified */ }; (3) (since C++17) class unsequenced_policy { /* unspecified */ }; (4) (since C++20) 1) The execution policy type used as a unique type to disambiguate parallel algorithm overloading and require that a parallel algorithm’s execution may not be parallelized. The invocations of element access functions in parallel algorithms invoked with…
std::execution::seq,std::execution::par,std::execution::par_unseq,std::execution::unseq – std::execution::seq,std::execution::par,std::execution::par_unseq,std::execution::unseq Synopsis Defined in header <execution> inline constexpr std::execution::sequenced_policy seq { /* unspecified */ }; (since C++17) inline constexpr std::execution::parallel_policy par { /* unspecified */ }; (since C++17) inline constexpr std::execution::parallel_unsequenced_policy par_unseq { /* unspecified */ }; (since C++17) inline constexpr std::execution::unsequenced_policy unseq { /* unspecified */ }; (since C++20) std::execution::seq, std::execution::par, std::execution::par_unseq,…
std::exclusive_scan – std::exclusive_scan Synopsis Defined in header <numeric> template< class InputIt, class OutputIt, class T > OutputIt exclusive_scan( InputIt first, InputIt last, (1) (since C++17) OutputIt d_first, T init ); template< class ExecutionPolicy, class ForwardIt1, class ForwardIt2, class T > ForwardIt2 exclusive_scan( ExecutionPolicy&& policy, ForwardIt1 first, ForwardIt1 last, (2) (since C++17) ForwardIt2 d_first, T init);…
std::exchange – std::exchange Synopsis Defined in header <utility> template< class T, class U = T > (since C++14) T exchange( T& obj, U&& new_value ); (until C++20) template< class T, class U = T > (since C++20) constexpr T exchange( T& obj, U&& new_value ); Replaces the value of obj with new_value and returns the…
std::exception_ptr – std::exception_ptr Synopsis Defined in header <exception> typedef /*unspecified*/ exception_ptr; (since C++11) std::exception_ptr is a nullable pointer-like type that manages an exception object which has been thrown and captured with std::current_exception. An instance of std::exception_ptr may be passed to another function, possibly on another thread, where the exception may be rethrown and handled with…
std::exception::what – std::exception::what Synopsis virtual const char* what() const throw(); (until C++11) virtual const char* what() const noexcept; (since C++11) Returns the explanatory string. Parameters (none) Return value Pointer to a null-terminated string with explanatory information. The pointer is guaranteed to be valid at least until the exception object from which it is obtained is…
std::exception::operator= – std::exception::operator= Synopsis exception &operator=(const exception &other) throw(); (until C++ 11) exception & operator=(const exception &other) noexcept; (since C++ 11) Copy assignment operator. Assigns the contents of other The effects of calling what() after assignment are implementation-defined. (until C++11) If *this and other both have dynamic type std::exception then std::strcmp(what(), other.what()) == 0. (since…
std::exception::~exception – std::exception::~exception Synopsis virtual ~exception(); Destroys the exception object.
std::exception – std::exception Synopsis Defined in header <exception> class exception; Provides consistent interface to handle errors through the throw_expression. All exceptions generated by the standard library inherit from std::exception * logic_error * invalid_argument * domain_error * length_error * out_of_range * future_error(C++11) * bad_optional_access(C++17) * runtime_error * range_error * overflow_error * underflow_error * regex_error(C++11) * nonexistent_local_time(C++20)…
std::error_condition::value – std::error_condition::value Synopsis int value() const noexcept; (since C++ 11) Returns the stored error code. Parameters (none) Return value The stored error code.
std::error_condition::operatorbool – std::error_condition::operatorbool Synopsis explicit operator bool() const noexcept; (since C++11) Checks whether the stored error code is not zero. Parameters (none) Return value true if value != 0, false otherwise.
std::error_condition::operator= – std::error_condition::operator= Synopsis error_condition &operator=(const error_condition &other) noexcept; (1)(since C++ 11)(implicitly declared) template <class ErrorConditionEnum> (2)(since C++ 11) error_condition & operator=(ErrorConditionEnum e) noexcept; Assigns contents to an error condition. 1) Copy assignment operator. Assigns the contents of other. 2) Assigns error condition for enum e. Effectively calls make_error_condition(). Does not participate in the overload…