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The execution::is_operation_state
trait detects whether a type T satisfies the execution::operation_state concept.
template<
typename T>
struct is_operation_state
Class template is_operation_state is a type trait that is derived
from true_type if the type T meets the concept
definition for an operation_state, otherwise false_type.
Header: asio/execution/operation_state.hpp
Convenience header: asio/execution.hpp