assert

 

C++

Linguaggio

Concetti

Libreria di Utilità

Stringhe

Contenitori

Algoritmi

Iteratori

Libreria matematca

Input/output

Localizzazione

Espressioni regolari(C++11)

Operazioni atomicche(C++11)

Multithreading(C++11)

 

Utilità libreria

Tipo di supporto (basic types, RTTI, type traits)

Gestione della memoria dinamica

La gestione degli errori

Programma di utilità

Funzioni variadic

Data e ora

Funzione oggetti

initializer_list (C++11)

bitset

hash (C++11)

Gli operatori relazionali Original: Relational operators The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions.

rel_ops::operator!= rel_ops::operator> rel_ops::operator<= rel_ops::operator>=

Coppie e tuple Original: Pairs and tuples The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions.

pair

tuple (C++11)

piecewise_construct_t (C++11)

piecewise_construct (C++11)

Swap, in avanti e spostare Original: Swap, forward and move The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions.

swap

forward (C++11)

move (C++11)

move_if_noexcept (C++11)

declval (C++11)

 

La gestione degli errori

Gestione delle eccezioni Original: Exception handling The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions.

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)

Gestione delle eccezioni fallimenti Original: Exception handling failures The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions.

terminate

terminate_handler

get_terminate (C++11)

set_terminate

unexpected (deprecato)

bad_exception

unexpected_handler (deprecato)

get_unexpected (C++11)(deprecato)

set_unexpected (deprecato)

Eccezione categorie Original: Exception categories The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions.

logic_error

invalid_argument

domain_error

length_error

out_of_range

runtime_error

range_error

overflow_error

underflow_error

Codici di errore Original: Error codes The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions.

Codici di errore

errno

Asserzioni Original: Assertions The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions.

assert

impianto system_error Original: system_error facility The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions.

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)

 

Elemento definito nell'header <cassert>
#ifdef NDEBUG #define assert(condition) ((void)0) #else #define assert(condition) /*implementation defined*/ #endif

La definizione del assert macro dipende un'altra macro, NDEBUG, che non è definito dalla libreria standard.

Original:

The definition of the macro assert depends on another macro, NDEBUG, which is not defined by the standard library.

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Se NDEBUG è definito come un nome di macro nel punto in cui il codice sorgente è incluso <cassert>, quindi assert non fa nulla.

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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Se NDEBUG non è definito, i controlli di assert se il suo argomento (che deve avere tipo scalare) confronta uguale a zero. In caso affermativo, assert uscite attuazione specifiche informazioni di diagnostica sul standard error e chiama std::abort. Le informazioni di diagnostica è necessario includere il testo expression, così come i valori dei macro standard __FILE__, __LINE__, e la variabile __func__ standard.

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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Parametri

condition

-

espressione di tipo scalare Original: expression of scalar type The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions.

Valore di ritorno

(Nessuno)

Original:

(none)

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Esempio

#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

Vedi anche

affermazione statico	esegue in fase di compilazione affermazione controllo (dal C++11) Original: performs compile-time assertion checking (dal C++11) The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions.
abort	causa chiusura anomala del programma (senza pulizia) Original: causes abnormal program termination (without cleaning up) The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions. (funzione)