std::uncaught_exception

 

C++

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initializer_list (C++11)

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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)

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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)

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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

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out_of_range

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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)

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system_error (C++11)

 

Elemento definito nell'header <exception>
bool uncaught_exception();

Rileva se il thread corrente ha un oggetto vivo eccezione, che è, una è stata generata un'eccezione e non ancora entrati in una clausola corrispondente cattura, std::terminate o std::unexpected. In altre parole, std::uncaught_exception rileva se la rimozione dello stack è attualmente in corso.

Original:

Detects if the current thread has a live exception object, that is, an exception has been thrown and not yet entered a matching catch clause, std::terminate or std::unexpected. In other words, std::uncaught_exception detects if stack unwinding is currently in progress.

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A volte è sicuro per generare un'eccezione anche durante std::uncaught_exception()==true. Ad esempio, se le eccezioni sono catturati e ignorati in un distruttore, non possono propagare fuori di esso e non porterà ad std::terminate.

Original:

Sometimes it's safe to throw an exception even while std::uncaught_exception()==true. For example, if exceptions are caught and ignored in a destructor, they can't propagate out of it and won't lead to std::terminate.

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Parametri

(Nessuno)

Original:

(none)

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Valore di ritorno

true se la rimozione dello stack è attualmente in corso in questo thread.

Original:

true if stack unwinding is currently in progress in this thread.

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Eccezioni

noexcept specification:  

noexcept

  (dal C++11)

Esempio

#include <iostream>#include <exception>#include <stdexcept>   struct Foo { ~Foo(){if(std::uncaught_exception()){std::cout<<"~Foo() called during stack unwinding\n";}else{std::cout<<"~Foo() called normally\n";}}};int main(){ Foo f;try{ Foo f;std::cout<<"Exception thrown\n";throwstd::runtime_error("test exception");}catch(conststd::exception& e){std::cout<<"Exception caught: "<< e.what()<<'\n';}}

Output:

Exception thrown ~Foo() called during stack unwinding Exception caught: test exception ~Foo() called normally

Vedi anche

terminate	funzione chiamata quando la gestione delle eccezioni non riesce Original: function called when exception handling fails The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions. (funzione)
exception_ptr (C++11)	puntatore di tipo comune per la gestione di oggetti eccezione Original: shared pointer type for handling exception objects The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions. (typedef)

Collegamenti esterni

GOTW issue 47: Uncaught Exceptions