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< cpp | error | error code C++ Compiler support Freestanding and hosted Language Standard library Standard library headers Named requirements Feature test macros (C++20) Language support library Concepts library (C++20) Diagnostics library Memory management library Metaprogramming library (C++11) General utilities library Containers library Iterators library Ranges library (C++20) Algorithms library Strings library Text processing library Numerics library Date and time library Input/output library Filesystem library (C++17) Concurrency support library (C++11) Execution control library (C++26) Technical specifications Symbols index External libraries [edit] Utilities library Language support Type support (basic types, RTTI) Library feature-test macros (C++20) Program utilities Variadic functions initializer_list(C++11)
is_constant_evaluated(C++20)
is_within_lifetime(C++26)
source_location(C++20)
Coroutine support (C++20) Contract support (C++26) Three-way comparison three_way_comparablethree_way_comparable_with(C++20)(C++20)
strong_ordering(C++20)
weak_ordering(C++20)
partial_ordering(C++20)
common_comparison_category(C++20)
compare_three_way_result(C++20)
compare_three_way(C++20)
strong_order(C++20)
weak_order(C++20)
partial_order(C++20)
compare_strong_order_fallback(C++20)
compare_weak_order_fallback(C++20)
compare_partial_order_fallback(C++20)
(C++20)(C++20)(C++20)
(C++20)(C++20)(C++20)
(C++11)
Relational operators (deprecated in C++20) rel_ops::operator!=rel_ops::operator> rel_ops::operator<=rel_ops::operator>= Integer comparison functions cmp_equalcmp_lesscmp_less_than(C++20)(C++20)(C++20)
(C++20)(C++20)(C++20)
in_range(C++20)
Swap and type operations swap ranges::swap(C++20)
exchange(C++14)
declval(C++11)
to_underlying(C++23)
forward(C++11)
forward_like(C++23)
move(C++11)
move_if_noexcept(C++11)
as_const(C++17)
Common vocabulary types pair tuple(C++11)
optional(C++17)
any(C++17)
variant(C++17)
tuple_size(C++11)
tuple_element(C++11)
apply(C++17)
make_from_tuple(C++17)
expected(C++23)
(until C++20*) (C++17)
(C++11)
make_exception_ptr(C++11)
current_exception(C++11)
rethrow_exception(C++11)
nested_exception(C++11)
throw_with_nested(C++11)
rethrow_if_nested(C++11)
Exception handling failures terminate terminate_handler get_terminate(C++11)
set_terminate bad_exception unexpected(until C++17*)
unexpected_handler(until C++17*)
get_unexpected(until C++17*)
set_unexpected(until C++17*)
Error numbers Error codes errno Assertions assert Exception categories logic_error invalid_argument domain_error length_error out_of_range runtime_error range_error overflow_error underflow_error tx_exception(TM TS)
System error error_category(C++11)
generic_category(C++11)
system_category(C++11)
error_condition(C++11)
errc(C++11)
error_code(C++11)
system_error(C++11)
Stacktrace stacktrace_entry(C++23)
basic_stacktrace(C++23)
Debugging support is_debugger_present(C++26)
breakpoint_if_debugging(C++26)
breakpoint(C++26)
[edit] std::error_code Member functions error_code::error_code error_code::operator= error_code::assign Modifiers error_code::clear Observers error_code::value error_code::category error_code::default_error_conditionerror_code::message
error_code::operator bool Non-member functions operator==operator!=operator<operator<=>(until C++20)(until C++20)(C++20)
operator<< Helper classes is_error_code_enum hash<std::error_code> [edit] std::string message() const; (since C++11)Returns the message corresponding to the current error code value and category.
Equivalent to category().message(value()).
[edit] Parameters(none)
[edit] Return valueThe error message corresponding to the current error code value and category.
[edit] ExceptionsMay throw implementation-defined exceptions.
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