Defined in header <complex> template< class T > complex<T> tan( const complex<T>& z ); Computes complex tangent of a complex value z. Parameters z - complex value Return value If no errors occur, the complex tangent of z is returned. Errors and special cases are handled as if the operation is implemented by -i * std::tanh(i*z), where i is the imaginary unit. Notes Tangent is an analytical function on the complex plain and has no branc

virtual const char* what() const; (since C++11) Returns the explanatory string. Parameters (none). Return value Pointer to a null-terminated string with explanatory information. Exceptions noexcept specification: noexcept See also code returns error code (public member function)

const std::error_code& code() const; (since C++11) Returns the stored error code. Parameters (none). Return value The stored error code. Exceptions noexcept specification: noexcept See also what [virtual] returns explanatory string (virtual public member function)

Defined in header <system_error> const std::error_category& system_category(); (since C++11) Obtains a reference to the static error category object for errors reported by the operating system. The object is required to override the virtual function std::error_category::name() to return a pointer to the string "system". It is also required to override the virtual function std::error_category::default_error_condition() to map the error codes that match POSIX errno values

system_error( std::error_code ec ); (1) (since C++11) system_error( std::error_code ec, const std::string& what_arg ); (2) (since C++11) system_error( std::error_code ec, const char* what_arg ); (2) (since C++11) system_error( int ev, const std::error_category& ecat ); (3) (since C++11) system_error( int ev, const std::error_category& ecat, const std::string& what_arg); (4) (since C++11) system_error( int ev, const std::error_category

Defined in header <cstdlib> int system( const char* command ); Calls the host environment's command processor (/bin/sh, cmd.exe, command.com) with the parameter command. Returns an implementation-defined value (usually the value that the invoked program returns). If command is a null pointer, checks if host environment has a command processor and returns nonzero value only if the command processor exists. Parameters command - character string identifying the command

Defined in header <system_error> class system_error; (since C++11) std::system_error is the type of the exception thrown by various library functions (typically the functions that interface with the OS facilities, e.g. the constructor of std::thread) when the exception has an associated std::error_code, which may be reported. Inheritance diagram. Member functions (constructor) constructs the system_error object (public member function) code returns error c

Defined in header <algorithm> template< class ForwardIt1, class ForwardIt2 > ForwardIt2 swap_ranges( ForwardIt1 first1, ForwardIt1 last1, ForwardIt2 first2 ); Exchanges elements between range [first1, last1) and another range starting at first2. Parameters first1, last1 - the first range of elements to swap first2 - beginning of the second range of elements to swap Type requirements - ForwardIt1, ForwardIt2 must meet the requirements of ForwardIterat

template< class Key, class Hash, class KeyEqual, class Alloc > void swap( unordered_set<Key,Hash,KeyEqual,Alloc>& lhs, unordered_set<Key,Hash,KeyEqual,Alloc>& rhs ); (since C++11) Specializes the std::swap algorithm for std::unordered_set. Swaps the contents of lhs and rhs. Calls lhs.swap(rhs). Parameters lhs, rhs - containers whose contents to swap Return value (none). Complexity Constant. Exceptions noexcept specification: noe

template< class Key, class T, class Hash, class KeyEqual, class Alloc > void swap( unordered_multimap<Key,T,Hash,KeyEqual,Alloc>& lhs, unordered_multimap<Key,T,Hash,KeyEqual,Alloc>& rhs ); (since C++11) Specializes the std::swap algorithm for std::unordered_multimap. Swaps the contents of lhs and rhs. Calls lhs.swap(rhs). Parameters lhs, rhs - containers whose contents to swap Return value (none). Complexity Constant. Exceptions