...one of the most highly
regarded and expertly designed C++ library projects in the
world.
— Herb Sutter and Andrei
Alexandrescu, C++
Coding Standards
Class used to specify that an asynchronous operation should return a function object to lazily launch the operation.
class deferred_t
Name |
Description |
---|---|
Adapts an executor to add the deferred_t completion token as the default. |
Name |
Description |
---|---|
as_default_on [static] |
Function helper to adapt an I/O object to use deferred_t as its default completion token type. |
deferred_t [constructor] |
Default constructor. |
Creates a new deferred from a function. |
|
values [static] |
Returns a deferred operation that returns the provided values. |
when [static] |
Creates a conditional object for branching deferred operations. |
The deferred_t
class is used to indicate that an asynchronous operation should return a
function object which is itself an initiation function. A deferred_t
object may be passed
as a completion token to an asynchronous operation, typically using the special
value boost::asio::deferred
. For example:
auto my_deferred_op = my_socket.async_read_some(my_buffer, boost::asio::deferred);
The initiating function (async_read_some in the above example) returns a function object that will lazily initiate the operation.
Header: boost/asio/deferred.hpp
Convenience header: boost/asio.hpp