std::is_error_code_enum<std::io_errc>

 

C++

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

basic_streambuf

basic_filebuf

basic_stringbuf

strstreambuf (deprecato)

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

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

ios_base

basic_ios

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basic_iostream

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basic_ifstream

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

basic_istringstream

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istrstream (deprecato)

ostrstream (deprecato)

strstream (deprecato)

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streamoff

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fpos

Errore categoria interfaccia Original: Error category interface The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions.

iostream_category (C++11)

io_errc (C++11)

 

std::io_errc

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

is_error_code_enum<std::io_errc>

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

make_error_code(std::io_errc)

make_error_condition(std::io_errc)

 

Elemento definito nell'header <ios>
template<> struct is_error_code_enum<std::io_errc>:publicstd::true_type{};		(dal C++11)

Questa specializzazione di componenti di libreria std::is_error_code_enum informa gli altri che i valori di tipo std::io_errc sono enumerazioni che contengono i codici di errore, che li rende convertibile in modo implicito e assegnabili a oggetti di tipo std::error_code.

Original:

This specialization of std::is_error_code_enum informs other library components that values of type std::io_errc are enumerations that hold error codes, which makes them implicitly convertible and assignable to objects of type std::error_code.

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Inherited from std::integral_constant

Member constants

value [statico]	true (pubblico membro statico costante)

Member functions

operator bool	converte l'oggetto in bool, restituisce value Original: converts the object to bool, returns value The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions. (metodo pubblico)

Member types

Tipo Original: Type The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions.	Definition
value_type	bool
type	std::integral_constant<bool, value>

Esempio

Il confronto tra e.code() e std::io_errc::stream compila perché std::is_error_code_enum<std::io_errc>::value==true

Original:

The comparison between e.code() and std::io_errc::stream compiles because std::is_error_code_enum<std::io_errc>::value==true

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#include <iostream>#include <fstream>int main(){std::ifstream f("doesn't exist");try{ f.exceptions(f.failbit);}catch(conststd::ios_base::failure& e){std::cout<<"Caught an ios_base::failure.\n";if(e.code()==std::io_errc::stream)std::cout<<"The error code is std::io_errc::stream\n";}}

Output:

Caught an ios_base::failure. The error code is std::io_errc::stream

Vedi anche

is_error_code_enum (C++11)	identifica una classe come codice_errore enumerazione Original: identifies a class as an error_code enumeration The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions. (classe template)
error_code (C++11)	in possesso di un dipendente dalla piattaforma codice di errore Original: holds a platform-dependent error code The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions. (classe)
io_errc (C++11)	il flusso IO codici di errore Original: the IO stream error codes The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions. (enum)