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Calls the current unexpected handler.
By default, the unexpected handler calls terminate. But this behavior can be redefined by calling set_unexpected.
This function is automatically called when a function throws an exception that is not listed in its dynamic-exception-specifier (i.e., in its
This function is provided so that the unexpected handler can be explicitly called by a program, and works even if set_unexpected has not been used to set a custom unexpected handler (calling terminate in this case).
Reference
C library:
- <cassert> (assert.h)
- <cctype> (ctype.h)
- <cerrno> (errno.h)
-
<cfenv> (fenv.h)C++11
- <cfloat> (float.h)
-
<cinttypes> (inttypes.h)C++11
- <ciso646> (iso646.h)
- <climits> (limits.h)
- <clocale> (locale.h)
- <cmath> (math.h)
- <csetjmp> (setjmp.h)
- <csignal> (signal.h)
- <cstdarg> (stdarg.h)
-
<cstdbool> (stdbool.h)C++11
- <cstddef> (stddef.h)
-
<cstdint> (stdint.h)C++11
- <cstdio> (stdio.h)
- <cstdlib> (stdlib.h)
- <cstring> (string.h)
-
<ctgmath> (tgmath.h)C++11
- <ctime> (time.h)
-
<cuchar> (uchar.h)C++11
- <cwchar> (wchar.h)
- <cwctype> (wctype.h)
Containers:
-
<array>C++11
- <deque>
-
<forward_list>C++11
- <list>
- <map>
- <queue>
- <set>
- <stack>
-
<unordered_map>C++11
-
<unordered_set>C++11
- <vector>
-
Input/Output:
Multi-threading:
-
<atomic>C++11
-
<condition_variable>C++11
-
<future>C++11
-
<mutex>C++11
-
<thread>C++11
-
Other:
- <algorithm>
- <bitset>
-
<chrono>C++11
-
<codecvt>C++11
- <complex>
- <exception>
- <functional>
-
<initializer_list>C++11
- <iterator>
- <limits>
- <locale>
- <memory>
- <new>
- <numeric>
-
<random>C++11
-
<ratio>C++11
-
<regex>C++11
- <stdexcept>
- <string>
-
<system_error>C++11
-
<tuple>C++11
-
<type_traits>C++11
-
<typeindex>C++11
- <typeinfo>
- <utility>
- <valarray>
<exception>
functions
-
current_exceptionC++11
-
get_terminateC++11
-
get_unexpectedC++11
-
make_exception_ptrC++11
-
rethrow_exceptionC++11
-
rethrow_if_nestedC++11
- set_terminate
- set_unexpected
- terminate
-
throw_with_nestedC++11
- uncaught_exception
- unexpected
-
types
- Reference
- <exception>
- unexpected
function
<exception>
std::unexpected
void unexpected();
[[noreturn]] void unexpected();
Function handling unexpected exceptions
By default, the unexpected handler calls terminate. But this behavior can be redefined by calling set_unexpected.
This function is automatically called when a function throws an exception that is not listed in its dynamic-exception-specifier (i.e., in its
throw specifier).This function is provided so that the unexpected handler can be explicitly called by a program, and works even if set_unexpected has not been used to set a custom unexpected handler (calling terminate in this case).
Return value
noneCompatibility
The use of dynamic-exception-specifiers is deprecated (since C++11).Exception safety
Throws an exception if it does not terminate execution of the program.See also
- set_unexpected
- Set unexpected handler function (function)
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Spotted an error? contact us