table of contents
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) (until
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.
(since C++11)
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 diagnostic
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 message. The
nearest standard equivalents are std::runtime_error or std::logic_error.
2022.07.31 | http://cppreference.com |