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Difference between revisions of "cpp/thread/future category"

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< cpp‎ | thread
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{{ddcl | header=future | since=c++11 |
 
{{ddcl | header=future | since=c++11 |
const std::error_category& future_category();
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const std::error_category& future_category() noexcept;
 
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===Return value===
 
===Return value===
 
A reference to the static object of unspecified runtime type, derived from {{lc|std::error_category}}.
 
A reference to the static object of unspecified runtime type, derived from {{lc|std::error_category}}.
 
===Exceptions===
 
{{noexcept}}
 
  
 
===Example===
 
===Example===
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Latest revision as of 12:51, 2 September 2021

 
 
Concurrency support library
Threads
(C++11)
(C++20)
this_thread namespace
(C++11)
(C++11)
(C++11)
Cooperative cancellation
Mutual exclusion
(C++11)
Generic lock management
(C++11)
(C++11)
(C++11)
(C++11)
(C++11)
Condition variables
(C++11)
Semaphores
Latches and Barriers
(C++20)
(C++20)
Futures
(C++11)
(C++11)
(C++11)
(C++11)
future_category
(C++11)
Safe Reclamation
(C++26)
Hazard Pointers
Atomic types
(C++11)
(C++20)
Initialization of atomic types
(C++11)(deprecated in C++20)
(C++11)(deprecated in C++20)
Memory ordering
Free functions for atomic operations
Free functions for atomic flags
 
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.

Contents

[edit] Parameters

(none)

[edit] Return value

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

[edit] Example

[edit] See also

identifies the future error codes
(enum) [edit]
reports an error related to futures or promises
(class) [edit]
base class for error categories
(class) [edit]