# std::future_category

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< cpp‎ | thread

Defined in header `<future>` |  |
const std::error_category & future_category() noexcept; |  | (since C++11)

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

### Parameters

(none)

### Return value

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

### Example

| This section is incomplete Reason: no example

### See also

future_errc (C++11) | identifies the future error codes (enum)
future_error (C++11) | reports an error related to futures or promises (class)
error_category (C++11) | base class for error categories (class)

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