FreeBSD Manual Pages
std::overflow_error(3) C++ Standard Libary std::overflow_error(3) NAME std::overflow_error - std::overflow_error Synopsis Defined in header <stdexcept> class overflow_error; Defines a type of object to be thrown as exception. It can be used to report arithmetic overflow errors (that is, situations where a result of a computation is too large for the destination type) The only standard library components that throw this exception are std::bitset::to_ulong and std::bitset::to_ullong. The mathematical functions of the standard library components do not throw this exception (mathematical functions report overflow errors as speci- fied in math_errhandling). Third-party libraries, however, use this. For ex- ample, boost.math throws std::overflow_error if boost::math::policies::throw_on_error is enabled (the default setting). std-overflow error-inheritance.svg Inheritance diagram Member functions constructor constructs a new overflow_error object with the given message (public member function) operator= replaces the overflow_error object (public member function) what returns the explanatory string (public member function) std::overflow_error::overflow_error overflow_error( const std::string& what_arg ); (1) overflow_error( const char* what_arg ); (2) (since C++11) overflow_error( const overflow_error& other ); (until C++11) overflow_error( const overflow_error& other ) (3) (since C++11) noexcept; 1-2) Constructs the exception object with what_arg as explanatory string that can be accessed through what(). 3) Copy constructor. If *this and other both have dynamic type std::overflow_error then std::strcmp(what(), other.what()) == 0. (since C++11) Parameters what_arg - explanatory string other - another exception object to copy Exceptions 1-2) May throw std::bad_alloc Notes Because copying std::overflow_error is not permitted to throw excep- tions, this message is typically stored internally as a separately-allocated reference-counted string. This is also why there is no constructor taking std::string&&: it would have to copy the content anyway. std::overflow_error::operator= overflow_error& operator=( const overflow_error& other ); (until C++11) overflow_error& operator=( const overflow_error& other ) noexcept; (since C++11) Assigns the contents with those of other. If *this and other both have dynamic type std::overflow_error then std::strcmp(what(), other.what()) == 0 after assignment. (since C++11) Parameters other - another exception object to assign with Return value *this std::overflow_error::what 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 string is suitable for conversion and display as a std::wstring. The pointer is guaranteed to be valid at least until the exception object from which it is ob- tained is destroyed, or until a non-const member function (e.g. copy assignment operator) on the exception object is called. Notes Implementations are allowed but not required to override what(). Inherited from std::runtime_error Inherited from std::exception Member functions destructor destroys the exception object [virtual] (virtual public member function of std::exception) what returns an explanatory string [virtual] (virtual public member function of std::exception) http://cppreference.com 2022.07.31 std::overflow_error(3)
NAME | Synopsis | Member functions | Parameters | Exceptions | Notes | Parameters | Return value | Parameters | Return value | Notes | Member functions
Want to link to this manual page? Use this URL:
<https://man.freebsd.org/cgi/man.cgi?query=std::overflow_error&sektion=3&manpath=FreeBSD+Ports+15.0>