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// This file is part of CAF, the C++ Actor Framework. See the file LICENSE in
// the main distribution directory for license terms and copyright or visit
// https://github.com/actor-framework/actor-framework/blob/master/LICENSE.
#pragma once
#include <tuple>
#include "caf/fwd.hpp"
namespace caf {
/// Identifies an unbound sequence of messages.
template <class DownstreamManager>
class stream_source_driver {
public:
// -- member types -----------------------------------------------------------
/// Type of the downstream manager, i.e., the type returned by
/// `stream_manager::out()`.
using downstream_manager_type = DownstreamManager;
/// Element type of the output stream.
using output_type = typename downstream_manager_type::output_type;
/// Type of the output stream.
using stream_type = stream<output_type>;
/// Implemented `stream_source` interface.
using source_type = stream_source<downstream_manager_type>;
/// Smart pointer to the interface type.
using source_ptr_type = intrusive_ptr<source_type>;
// -- constructors, destructors, and assignment operators --------------------
virtual ~stream_source_driver() {
// nop
}
// -- virtual functions ------------------------------------------------------
/// Cleans up any state.
virtual void finalize(const error&) {
// nop
}
// -- pure virtual functions -------------------------------------------------
/// Generates more elements for `dst`.
virtual void pull(downstream<output_type>& dst, size_t num) = 0;
/// Returns `true` if the source is done sending, otherwise `false`.
virtual bool done() const noexcept = 0;
};
} // namespace caf
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