std::iostream_category

 

C++

Язык

Понятия (концепции)

Утилиты

Строки

Контейнеры

Алгоритмы

Итераторы

Работа с числами

Ввод / вывод

Локализация

Регулярные выражения (C++11)

Атомарные примитивы (C++11)

Потоки (C++11)

 

Библиотеки ввода / вывода

I / O манипуляторов

C-стиль I / O

Буферы 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 (устарело)

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

Абстракций 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

basic_istream

basic_ostream

basic_iostream

Файл I / O Original: File 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_ifstream

basic_ofstream

basic_fstream

Струнный 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

basic_ostringstream

basic_stringstream

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

istrstream (устарело)

ostrstream (устарело)

strstream (устарело)

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

streamoff

streamsize

fpos

Интерфейс Ошибка категории 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)

 

Заголовочный файл <ios>
const std::error_category& iostream_category();		(начиная с C++11)

Получает ссылку на статический объект категории ошибки для ошибки IOStream. Объект требуется переопределить виртуальный error_category::name() функция возвращает указатель на строку "iostream". Он используется для определения кодов ошибок приводится в исключения типа std::ios_base::failure.

Original:

Obtains a reference to the static error category object for iostream errors. The object is required to override the virtual function error_category::name() to return a pointer to the string "iostream". It is used to identify error codes provided in the exceptions of type std::ios_base::failure.

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Параметры

(Нет)

Original:

(none)

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Возвращаемое значение

Ссылка на статический объект неопределенного типа среды, полученные от std::error_category.

Original:

A reference to the static object of unspecified runtime type, derived from std::error_category.

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Исключения

noexcept-спецификация:  

noexcept

  (начиная с C++11)

Пример

#include <iostream>
#include <fstream>
 
int main()
{
    std::ifstream f("doesn't exist");
    try {
        f.exceptions(f.failbit);
    } catch (const std::ios_base::failure& e) {
        std::cout << "Caught an ios_base::failure.\n"
                  << "Error category: " << e.code().category().name() << '\n';
    }
}

Вывод:

Caught an ios_base::failure.
Error category: iostream

См. также

failure	Поток исключение Original: stream exception The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions. (public член класса std::ios_base)
io_errc (C++11)	IO коды поток ошибок 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. (перечисление)