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Class used to specify that an asynchronous operation should return a function object to lazily launch the operation.
class deferred_t
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Name |
Description |
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Type alias to adapt an I/O object to use deferred_t as its default completion token type. |
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Adapts an executor to add the deferred_t completion token as the default. |
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Name |
Description |
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as_default_on [static] |
Function helper to adapt an I/O object to use deferred_t as its default completion token type. |
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deferred_t [constructor] |
Default constructor. |
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Creates a new deferred from a function. |
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values [static] |
Returns a deferred operation that returns the provided values. |
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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 asio::deferred. For example:
auto my_deferred_op = my_socket.async_read_some(my_buffer, asio::deferred);
The initiating function (async_read_some in the above example) returns a function object that will lazily initiate the operation.
Header: asio/deferred.hpp
Convenience header: asio.hpp