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    assert

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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
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    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
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    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)
     
    <tbody> </tbody>
    definiert in Header <cassert>
    #ifdef NDEBUG #define assert(condition) ((void)0) #else #define assert(condition) /*implementation defined*/ #endif
    Die Definition des Makros assert hängt von einem anderen Makro, NDEBUG, die nicht von der Standard-Bibliothek definiert ist .
    Original:
    The definition of the macro assert depends on another macro, NDEBUG, which is not defined by the standard library.
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    Wenn NDEBUG als Makronamen an der Stelle im Quellcode, wo <cassert> enthalten ist definiert wird, dann assert nichts .
    Original:
    If NDEBUG is defined as a macro name at the point in the source code where <cassert> is included, then assert does nothing.
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    Wenn NDEBUG nicht definiert ist, dann assert prüft, ob ihr Argument (das muss skalar Art haben) vergleicht gleich Null. Ist dies der Fall, assert ausgibt Umsetzung Diagnose-Informationen über die Standard-Fehlerausgabe und ruft std::abort. Die Diagnoseinformationen ist erforderlich, um den Text der expression sowie die Werte der Standard-Makros __FILE__, __LINE__, und die Standard-Variable __func__ gehören .
    Original:
    If NDEBUG is not defined, then assert checks if its argument (which must have scalar type) compares equal to zero. If it does, assert outputs implementation-specific diagnostic information on the standard error output and calls std::abort. The diagnostic information is required to include the text of expression, as well as the values of the standard macros __FILE__, __LINE__, and the standard variable __func__.
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    Parameter

    condition -
    Ausdruck der skalaren Typ
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    expression of scalar type
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    Rückgabewert

    (None)
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    (none)
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    Beispiel

    #include <iostream>
// uncomment to disable assert()
// #define NDEBUG
#include <cassert>

int main()
{
    assert(2+2==4);
    std::cout << "Execution continues past the first assert\n";
    assert(2+2==5);
    std::cout << "Execution continues past the second assert\n";
}

    Output: 

    Execution continues past the first assert
test: test.cc:8: int main(): Assertion `2+2==5' failed.
Aborted

    Siehe auch

    statische Behauptung
    führt Kompilierung assertion checking (seit C++11)
    Original:
    performs compile-time assertion checking (seit C++11)
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    [edit]
    verursacht abnormale Beendigung des Programms (ohne Reinigung)
    Original:
    causes abnormal program termination (without cleaning up)
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    (Funktion) [edit]