std::exception::exception(3) C++ Standard Libary std::exception::exception(3) NAME std::exception::exception - std::exception::exception Synopsis exception() throw(); (until C++11) exception() noexcept; (1) (since C++11) exception( const exception& other ) throw(); (2) (un- til C++11) exception( const exception& other ) noexcept; (since C++11) Constructs new exception object. 1) Default constructor. what() returns an implementation-defined string. 2) Copy constructor. Initializes the contents with those of other. If *this and other both have dynamic type std::exception then std::strcmp(what(), other.what()) == 0. Parameters other - another exception to assign the contents of Notes Because copying std::exception is not permitted to throw exceptions, when derived classes (such as std::runtime_error) have to manage a user-defined diag- nostic message, it is typically implemented as a copy-on-write string. The Microsoft implementation includes non-standard constructors taking strings thus allowing instances to be thrown directly with a meaningful error mes- sage. The nearest standard equivalents are std::runtime_error or std::logic_error. Defect reports The following behavior-changing defect reports were applied retroac- tively to previously published C++ standards. DR Applied to Behavior as published Cor- rect behavior LWG 471 C++98 there is no requirement on what() of the added exception copy http://cppreference.com 2024.06.10 std::exception::exception(3)
NAME | Synopsis | Parameters | Notes
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