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std::future_error

提供: cppreference.com
< cpp‎ | thread

 
 
スレッドのサポートライブラリ
スレッド
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Threads
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thread(C++11)
this_thread空間
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this_thread namespace
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get_id(C++11)
yield(C++11)
sleep_for(C++11)
sleep_until(C++11)
相互排除
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Mutual exclusion
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mutex(C++11)
timed_mutex(C++11)
汎用のロック管理
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Generic lock management
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lock_guard(C++11)
unique_lock(C++11)
defer_lock_t
try_to_lock_t
adopt_lock_t
(C++11)
(C++11)
(C++11)
lock(C++11)
try_lock(C++11)
defer_lock
try_to_lock
adopt_lock
(C++11)
(C++11)
(C++11)
条件変数
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Condition variables
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condition_variable(C++11)
condition_variable_any(C++11)
notify_all_at_thread_exit(C++11)
cv_status(C++11)
先物
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Futures
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promise(C++11)
future(C++11)
shared_future(C++11)
packaged_task(C++11)
async(C++11)
launch(C++11)
future_status(C++11)
future_error(C++11)
future_category(C++11)
future_errc(C++11)
 
std::future_error
メンバ関数
Original:
Member functions
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future_error::future_error
future_error::code
future_error::what
 
Defined in header <future>
class future_error;
(C + + 11以来)
クラスstd::future_errorは非同期実行し、共有状態(std::futurestd::promiseなど)を扱っているスレッドライブラリの関数で失敗した場合にスローされる例外オブジェクトを定義します。 std::system_errorと同様に、この例外がstd::error_codeと互換性のあるエラーコードを運ぶ.
Original:
The class std::future_error defines an exception object that is thrown on failure by the functions in the thread library that deal with asynchronous execution and shared states (std::future, std::promise, etc). Similar to std::system_error, this exception carries an error code compatible with std::error_code.
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cpp/error/exceptioncpp/error/logic errorstd-future error-inheritance.svg
画像の詳細

Inheritance diagram

目次

[編集] メンバ関数

std::future_errorオブジェクトを作成します
Original:
creates a std::future_error object
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(パブリックメンバ関数) [edit]
エラーコードを返します
Original:
returns the error code
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(パブリックメンバ関数) [edit]
エラーコードに固有の説明の文字列を返します
Original:
returns the explanatory string specific to the error code
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(パブリックメンバ関数) [edit]

Inherited from std::logic_error

Inherited from std::exception

Member functions

例外オブジェクトを破棄します
Original:
destructs the exception object
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(仮想パブリックメンバ関数of std::exception) [edit]
[仮想]
説明文字列を返します
Original:
returns an explanatory string
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(仮想パブリックメンバ関数of std::exception) [edit]

[編集]

#include <future>
#include <iostream>
 
int main()
{
    std::future<int> empty;
    try {
        int n = empty.get();
    } catch (const std::future_error& e) {
        std::cout << "Caught a future_error with code \"" << e.code()
                  << "\"\nMessage: \"" << e.what() << "\"\n";
    }
}

Output:

Caught a future_error with code "future:3"
Message: "No associated state"

[編集] も参照してください

将来のエラー·コードを識別します
Original:
identifies the future error codes
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(列挙) [edit]