std::error_code::operator bool – cppreference.com

std::error_code::operator bool

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<metanoindex/>

 
C++
 
Utilities-Bibliothek
 
Fehlerbehandlung
Exception Handling
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Exception handling
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exception
uncaught_exception
exception_ptr(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)
Ausnahmebehandlung Ausfälle
Original:
Exception handling failures
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terminate
terminate_handler
get_terminate(C++11)
set_terminate
unexpected(veraltet)
bad_exception
unexpected_handler(veraltet)
get_unexpected(C++11)(veraltet)
set_unexpected(veraltet)
Exception Kategorien
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Exception categories
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logic_error
invalid_argument
domain_error
length_error
out_of_range
runtime_error
range_error
overflow_error
underflow_error
Fehlercodes
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Error codes
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Fehlercodes
errno
Assertions
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Assertions
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assert
system_error Anlage
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system_error facility
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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)
 
std::error_code
Member-Funktionen
Original:
Member functions
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error_code::error_code
error_code::operator=
error_code::assign
Modifiers
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Modifiers
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error_code::clear
Beobachter
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Observers
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error_code::value
error_code::category
error_code::default_error_condition
error_code::message
error_code::operator bool
Non-Member-Funktionen
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Non-member functions
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operator<
operator==
operator!=
operator<<
make_error_code
Helper-Klassen
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Helper classes
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is_error_code_enum
hash<std::error_code>
 
<tbody> </tbody>
explicit operator bool() const;
 (seit C++11)
Prüft, ob der Fehler Wert gültig ist, dh nicht-Null .
Original:
Checks if the error value is valid, i.e. non-zero.
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Parameter

(None)
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(none)
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Rückgabewert

false wenn value() == 0, true sonst .
Original:
false if value() == 0, true otherwise.
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Ausnahmen

noexcept specification:  
<tbody> </tbody>
  (seit C++11)