std::future_errc
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| Defined in header <ios>
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| enum class future_errc { broken_promise, |
（C++11 起） | |
The scoped enumeration std::future_errc defines the error codes reported by std::future and related classes in std::future_error exception objects. Only four error codes are required, although the implementation may define additional error codes. Because the appropriate specialization of std::is_error_code_enum is provided, values of type std::future_errc are implicitly convertible to std::error_code.
目錄 |
[编辑] 。會員常數。
| 。常數。
Original: Constant The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions. |
Explanation |
broken_promise
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the asynchronous task abandoned its shared state |
future_already_retrieved
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the contents of shared state were already accessed through std::future |
promise_already_satisfied
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attempt to store a value in the shared state twice |
no_state
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attempt to access std::promise or std::future without an associated shared state |
[编辑] 。 Helper類。
| extends the type trait std::is_error_code_enum to identify future error codes （類模板） | |
[编辑] 。非成員函數。
| constructs a future error code （函數） | |
| constructs a future error_condition （函數） | |
[编辑] 。為例。
| 本節是不完整的 原因: no example |
[编辑] 。另請參閱。
| （C++11） |
持有與平台相關的錯誤代碼 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. （類） |
| （C++11） |
持有攜帶型的錯誤代碼 Original: holds a portable error code The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions. （類） |
