Difference between revisions of "cpp/error/unexpected"
(Line break fix.) |
YexuanXiao (Talk | contribs) m |
||
| Line 7: | Line 7: | ||
void unexpected(); | void unexpected(); | ||
}} | }} | ||
| − | {{dcl| | + | {{dcl|deprecated=c++11|until=c++17| |
[[noreturn]] void unexpected(); | [[noreturn]] void unexpected(); | ||
}} | }} | ||
Latest revision as of 03:48, 20 August 2024
| Defined in header <exception>
|
||
| void unexpected(); |
(until C++11) | |
| [[noreturn]] void unexpected(); |
(deprecated in C++11) (removed in C++17) |
|
std::unexpected() is called by the C++ runtime when a dynamic exception specification is violated: an exception is thrown from a function whose exception specification forbids exceptions of this type.
std::unexpected() may also be called directly from the program.
In either case, std::unexpected calls the currently installed std::unexpected_handler. The default std::unexpected_handler calls std::terminate.
|
If a destructor reset the unexpected handler during stack unwinding and the unwinding later led to |
(until C++11) |
|
If a destructor reset the unexpected handler during stack unwinding, it is unspecified which handler is called if the unwinding later led to |
(since C++11) |
[edit] Exceptions
Throw any exception thrown by the currently installed std::unexpected_handler.
[edit] Defect reports
The following behavior-changing defect reports were applied retroactively to previously published C++ standards.
| DR | Applied to | Behavior as published | Correct behavior |
|---|---|---|---|
| LWG 2111 | C++11 | effect of calling std::set_unexpected during stack unwinding differs from C++98 and breaks some ABIs |
made unspecified |
[edit] See also
| (C++23) |
represented as an unexpected value (class template) |
| (deprecated in C++11)(removed in C++17) |
the type of the function called by std::unexpected (typedef) |
