feat add rxcpp
This commit is contained in:
tqcq
309
3party/rxcpp/operators/rx-concat.hpp
Normal file
309
3party/rxcpp/operators/rx-concat.hpp
Normal file
@ -0,0 +1,309 @@
|
||||
// Copyright (c) Microsoft Open Technologies, Inc. All rights reserved. See License.txt in the project root for license information.
|
||||
|
||||
#pragma once
|
||||
|
||||
/*! \file rx-concat.hpp
|
||||
|
||||
\brief For each item from this observable subscribe to one at a time, in the order received.
|
||||
For each item from all of the given observables deliver from the new observable that is returned.
|
||||
|
||||
There are 2 variants of the operator:
|
||||
- The source observable emits nested observables, nested observables are concatenated.
|
||||
- The source observable and the arguments v0...vn are used to provide the observables to concatenate.
|
||||
|
||||
\tparam Coordination the type of the scheduler (optional).
|
||||
\tparam Value0 ... (optional).
|
||||
\tparam ValueN types of source observables (optional).
|
||||
|
||||
\param cn the scheduler to synchronize sources from different contexts (optional).
|
||||
\param v0 ... (optional).
|
||||
\param vn source observables (optional).
|
||||
|
||||
\return Observable that emits the items emitted by each of the Observables emitted by the source observable, one after the other, without interleaving them.
|
||||
|
||||
\sample
|
||||
\snippet concat.cpp implicit concat sample
|
||||
\snippet output.txt implicit concat sample
|
||||
|
||||
\sample
|
||||
\snippet concat.cpp threaded implicit concat sample
|
||||
\snippet output.txt threaded implicit concat sample
|
||||
|
||||
\sample
|
||||
\snippet concat.cpp concat sample
|
||||
\snippet output.txt concat sample
|
||||
|
||||
\sample
|
||||
\snippet concat.cpp threaded concat sample
|
||||
\snippet output.txt threaded concat sample
|
||||
*/
|
||||
|
||||
#if !defined(RXCPP_OPERATORS_RX_CONCAT_HPP)
|
||||
#define RXCPP_OPERATORS_RX_CONCAT_HPP
|
||||
|
||||
#include "../rx-includes.hpp"
|
||||
|
||||
namespace rxcpp {
|
||||
|
||||
namespace operators {
|
||||
|
||||
namespace detail {
|
||||
|
||||
template<class... AN>
|
||||
struct concat_invalid_arguments {};
|
||||
|
||||
template<class... AN>
|
||||
struct concat_invalid : public rxo::operator_base<concat_invalid_arguments<AN...>> {
|
||||
using type = observable<concat_invalid_arguments<AN...>, concat_invalid<AN...>>;
|
||||
};
|
||||
template<class... AN>
|
||||
using concat_invalid_t = typename concat_invalid<AN...>::type;
|
||||
|
||||
template<class T, class Observable, class Coordination>
|
||||
struct concat
|
||||
: public operator_base<rxu::value_type_t<rxu::decay_t<T>>>
|
||||
{
|
||||
typedef concat<T, Observable, Coordination> this_type;
|
||||
|
||||
typedef rxu::decay_t<T> source_value_type;
|
||||
typedef rxu::decay_t<Observable> source_type;
|
||||
typedef rxu::decay_t<Coordination> coordination_type;
|
||||
|
||||
typedef typename coordination_type::coordinator_type coordinator_type;
|
||||
|
||||
typedef typename source_type::source_operator_type source_operator_type;
|
||||
typedef source_value_type collection_type;
|
||||
typedef typename collection_type::value_type value_type;
|
||||
|
||||
struct values
|
||||
{
|
||||
values(source_operator_type o, coordination_type sf)
|
||||
: source_operator(std::move(o))
|
||||
, coordination(std::move(sf))
|
||||
{
|
||||
}
|
||||
source_operator_type source_operator;
|
||||
coordination_type coordination;
|
||||
};
|
||||
values initial;
|
||||
|
||||
concat(const source_type& o, coordination_type sf)
|
||||
: initial(o.source_operator, std::move(sf))
|
||||
{
|
||||
}
|
||||
|
||||
template<class Subscriber>
|
||||
void on_subscribe(Subscriber scbr) const {
|
||||
static_assert(is_subscriber<Subscriber>::value, "subscribe must be passed a subscriber");
|
||||
|
||||
typedef Subscriber output_type;
|
||||
|
||||
struct concat_state_type
|
||||
: public std::enable_shared_from_this<concat_state_type>
|
||||
, public values
|
||||
{
|
||||
concat_state_type(values i, coordinator_type coor, output_type oarg)
|
||||
: values(i)
|
||||
, source(i.source_operator)
|
||||
, sourceLifetime(composite_subscription::empty())
|
||||
, collectionLifetime(composite_subscription::empty())
|
||||
, coordinator(std::move(coor))
|
||||
, out(std::move(oarg))
|
||||
{
|
||||
}
|
||||
|
||||
void subscribe_to(collection_type st)
|
||||
{
|
||||
auto state = this->shared_from_this();
|
||||
|
||||
collectionLifetime = composite_subscription();
|
||||
|
||||
// when the out observer is unsubscribed all the
|
||||
// inner subscriptions are unsubscribed as well
|
||||
auto innercstoken = state->out.add(collectionLifetime);
|
||||
|
||||
collectionLifetime.add(make_subscription([state, innercstoken](){
|
||||
state->out.remove(innercstoken);
|
||||
}));
|
||||
|
||||
auto selectedSource = on_exception(
|
||||
[&](){return state->coordinator.in(std::move(st));},
|
||||
state->out);
|
||||
if (selectedSource.empty()) {
|
||||
return;
|
||||
}
|
||||
|
||||
// this subscribe does not share the out subscription
|
||||
// so that when it is unsubscribed the out will continue
|
||||
auto sinkInner = make_subscriber<value_type>(
|
||||
state->out,
|
||||
collectionLifetime,
|
||||
// on_next
|
||||
[state, st](value_type ct) {
|
||||
state->out.on_next(ct);
|
||||
},
|
||||
// on_error
|
||||
[state](rxu::error_ptr e) {
|
||||
state->out.on_error(e);
|
||||
},
|
||||
//on_completed
|
||||
[state](){
|
||||
if (!state->selectedCollections.empty()) {
|
||||
auto value = state->selectedCollections.front();
|
||||
state->selectedCollections.pop_front();
|
||||
state->collectionLifetime.unsubscribe();
|
||||
state->subscribe_to(value);
|
||||
} else if (!state->sourceLifetime.is_subscribed()) {
|
||||
state->out.on_completed();
|
||||
}
|
||||
}
|
||||
);
|
||||
auto selectedSinkInner = on_exception(
|
||||
[&](){return state->coordinator.out(sinkInner);},
|
||||
state->out);
|
||||
if (selectedSinkInner.empty()) {
|
||||
return;
|
||||
}
|
||||
selectedSource->subscribe(std::move(selectedSinkInner.get()));
|
||||
}
|
||||
observable<source_value_type, source_operator_type> source;
|
||||
composite_subscription sourceLifetime;
|
||||
composite_subscription collectionLifetime;
|
||||
std::deque<collection_type> selectedCollections;
|
||||
coordinator_type coordinator;
|
||||
output_type out;
|
||||
};
|
||||
|
||||
auto coordinator = initial.coordination.create_coordinator(scbr.get_subscription());
|
||||
|
||||
// take a copy of the values for each subscription
|
||||
auto state = std::make_shared<concat_state_type>(initial, std::move(coordinator), std::move(scbr));
|
||||
|
||||
state->sourceLifetime = composite_subscription();
|
||||
|
||||
// when the out observer is unsubscribed all the
|
||||
// inner subscriptions are unsubscribed as well
|
||||
state->out.add(state->sourceLifetime);
|
||||
|
||||
auto source = on_exception(
|
||||
[&](){return state->coordinator.in(state->source);},
|
||||
state->out);
|
||||
if (source.empty()) {
|
||||
return;
|
||||
}
|
||||
|
||||
// this subscribe does not share the observer subscription
|
||||
// so that when it is unsubscribed the observer can be called
|
||||
// until the inner subscriptions have finished
|
||||
auto sink = make_subscriber<collection_type>(
|
||||
state->out,
|
||||
state->sourceLifetime,
|
||||
// on_next
|
||||
[state](collection_type st) {
|
||||
if (state->collectionLifetime.is_subscribed()) {
|
||||
state->selectedCollections.push_back(st);
|
||||
} else if (state->selectedCollections.empty()) {
|
||||
state->subscribe_to(st);
|
||||
}
|
||||
},
|
||||
// on_error
|
||||
[state](rxu::error_ptr e) {
|
||||
state->out.on_error(e);
|
||||
},
|
||||
// on_completed
|
||||
[state]() {
|
||||
if (!state->collectionLifetime.is_subscribed() && state->selectedCollections.empty()) {
|
||||
state->out.on_completed();
|
||||
}
|
||||
}
|
||||
);
|
||||
auto selectedSink = on_exception(
|
||||
[&](){return state->coordinator.out(sink);},
|
||||
state->out);
|
||||
if (selectedSink.empty()) {
|
||||
return;
|
||||
}
|
||||
source->subscribe(std::move(selectedSink.get()));
|
||||
}
|
||||
};
|
||||
|
||||
}
|
||||
|
||||
/*! @copydoc rx-concat.hpp
|
||||
*/
|
||||
template<class... AN>
|
||||
auto concat(AN&&... an)
|
||||
-> operator_factory<concat_tag, AN...> {
|
||||
return operator_factory<concat_tag, AN...>(std::make_tuple(std::forward<AN>(an)...));
|
||||
}
|
||||
|
||||
}
|
||||
|
||||
template<>
|
||||
struct member_overload<concat_tag>
|
||||
{
|
||||
template<class Observable,
|
||||
class Enabled = rxu::enable_if_all_true_type_t<
|
||||
is_observable<Observable>>,
|
||||
class SourceValue = rxu::value_type_t<Observable>,
|
||||
class Concat = rxo::detail::concat<SourceValue, rxu::decay_t<Observable>, identity_one_worker>,
|
||||
class Value = rxu::value_type_t<SourceValue>,
|
||||
class Result = observable<Value, Concat>
|
||||
>
|
||||
static Result member(Observable&& o) {
|
||||
return Result(Concat(std::forward<Observable>(o), identity_current_thread()));
|
||||
}
|
||||
|
||||
template<class Observable, class Coordination,
|
||||
class Enabled = rxu::enable_if_all_true_type_t<
|
||||
is_observable<Observable>,
|
||||
is_coordination<Coordination>>,
|
||||
class SourceValue = rxu::value_type_t<Observable>,
|
||||
class Concat = rxo::detail::concat<SourceValue, rxu::decay_t<Observable>, rxu::decay_t<Coordination>>,
|
||||
class Value = rxu::value_type_t<SourceValue>,
|
||||
class Result = observable<Value, Concat>
|
||||
>
|
||||
static Result member(Observable&& o, Coordination&& cn) {
|
||||
return Result(Concat(std::forward<Observable>(o), std::forward<Coordination>(cn)));
|
||||
}
|
||||
|
||||
template<class Observable, class Value0, class... ValueN,
|
||||
class Enabled = rxu::enable_if_all_true_type_t<
|
||||
all_observables<Observable, Value0, ValueN...>>,
|
||||
class EmittedValue = rxu::value_type_t<Observable>,
|
||||
class SourceValue = observable<EmittedValue>,
|
||||
class ObservableObservable = observable<SourceValue>,
|
||||
class Concat = typename rxu::defer_type<rxo::detail::concat, SourceValue, ObservableObservable, identity_one_worker>::type,
|
||||
class Value = rxu::value_type_t<Concat>,
|
||||
class Result = observable<Value, Concat>
|
||||
>
|
||||
static Result member(Observable&& o, Value0&& v0, ValueN&&... vn) {
|
||||
return Result(Concat(rxs::from(o.as_dynamic(), v0.as_dynamic(), vn.as_dynamic()...), identity_current_thread()));
|
||||
}
|
||||
|
||||
template<class Observable, class Coordination, class Value0, class... ValueN,
|
||||
class Enabled = rxu::enable_if_all_true_type_t<
|
||||
all_observables<Observable, Value0, ValueN...>,
|
||||
is_coordination<Coordination>>,
|
||||
class EmittedValue = rxu::value_type_t<Observable>,
|
||||
class SourceValue = observable<EmittedValue>,
|
||||
class ObservableObservable = observable<SourceValue>,
|
||||
class Concat = typename rxu::defer_type<rxo::detail::concat, SourceValue, ObservableObservable, rxu::decay_t<Coordination>>::type,
|
||||
class Value = rxu::value_type_t<Concat>,
|
||||
class Result = observable<Value, Concat>
|
||||
>
|
||||
static Result member(Observable&& o, Coordination&& cn, Value0&& v0, ValueN&&... vn) {
|
||||
return Result(Concat(rxs::from(o.as_dynamic(), v0.as_dynamic(), vn.as_dynamic()...), std::forward<Coordination>(cn)));
|
||||
}
|
||||
|
||||
template<class... AN>
|
||||
static operators::detail::concat_invalid_t<AN...> member(AN...) {
|
||||
std::terminate();
|
||||
return {};
|
||||
static_assert(sizeof...(AN) == 10000, "concat takes (optional Coordination, optional Value0, optional ValueN...)");
|
||||
}
|
||||
};
|
||||
|
||||
}
|
||||
|
||||
#endif
|
||||
Reference in New Issue
Block a user