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C library:
<cassert> (assert.h)
<cctype> (ctype.h)
<cerrno> (errno.h)
C++11
<cfenv> (fenv.h)
<cfloat> (float.h)
C++11
<cinttypes> (inttypes.h)
<ciso646> (iso646.h)
<climits> (limits.h)
<clocale> (locale.h)
<cmath> (math.h)
<csetjmp> (setjmp.h)
<csignal> (signal.h)
<cstdarg> (stdarg.h)
C++11
<cstdbool> (stdbool.h)
<cstddef> (stddef.h)
C++11
<cstdint> (stdint.h)
<cstdio> (stdio.h)
<cstdlib> (stdlib.h)
<cstring> (string.h)
C++11
<ctgmath> (tgmath.h)
<ctime> (time.h)
C++11
<cuchar> (uchar.h)
<cwchar> (wchar.h)
<cwctype> (wctype.h)
Containers:
C++11
<array>
<deque>
C++11
<forward_list>
<list>
<map>
<queue>
<set>
<stack>
C++11
<unordered_map>
C++11
<unordered_set>
<vector>
Input/Output:
<fstream>
<iomanip>
<ios>
<iosfwd>
<iostream>
<istream>
<ostream>
<sstream>
<streambuf>
Multi-threading:
C++11
<atomic>
C++11
<condition_variable>
C++11
<future>
C++11
<mutex>
C++11
<thread>
Other:
<algorithm>
<bitset>
C++11
<chrono>
C++11
<codecvt>
<complex>
<exception>
<functional>
C++11
<initializer_list>
<iterator>
<limits>
<locale>
<memory>
<new>
<numeric>
C++11
<random>
C++11
<ratio>
C++11
<regex>
<stdexcept>
<string>
C++11
<system_error>
C++11
<tuple>
C++11
<type_traits>
C++11
<typeindex>
<typeinfo>
<utility>
<valarray>
<system_error>
classes
C++11
error_category
C++11
error_code
C++11
error_condition
C++11
is_error_code_enum
C++11
is_error_condition_enum
C++11
system_error
enum classes
C++11
errc
functions
C++11
generic_category
C++11
make_error_code
C++11
make_error_condition
C++11
system_category
error_condition
C++11
error_condition::error_condition
member functions
C++11
error_condition::assign
C++11
error_condition::category
C++11
error_condition::clear
C++11
error_condition::message
C++11
error_condition::operator bool
C++11
error_condition::operator=
C++11
error_condition::value
non-member overloads
C++11
relational operators (error_condition)
Reference
<system_error>
error_condition
value
public member function
<system_error>
std::
error_condition
::value
int value() const noexcept;
Error condition value
Returns the value associated with the
error_condition
object.
Parameters
none
Return value
The error condition value.
See also
error_condition::category
Get category
(public member function)
error_condition::message
Get message
(public member function)