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-rw-r--r--Rx/v2/src/rxcpp/operators/rx-map.hpp145
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diff --git a/Rx/v2/src/rxcpp/operators/rx-map.hpp b/Rx/v2/src/rxcpp/operators/rx-map.hpp
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-// Copyright (c) Microsoft Open Technologies, Inc. All rights reserved. See License.txt in the project root for license information.
-
-#pragma once
-
-/*! \file rx-map.hpp
-
- \brief For each item from this observable use Selector to produce an item to emit from the new observable that is returned.
-
- \tparam Selector the type of the transforming function
-
- \param s the selector function
-
- \return Observable that emits the items from the source observable, transformed by the specified function.
-
- \sample
- \snippet map.cpp map sample
- \snippet output.txt map sample
-*/
-
-#if !defined(RXCPP_OPERATORS_RX_MAP_HPP)
-#define RXCPP_OPERATORS_RX_MAP_HPP
-
-#include "../rx-includes.hpp"
-
-namespace rxcpp {
-
-namespace operators {
-
-namespace detail {
-
-template<class... AN>
-struct map_invalid_arguments {};
-
-template<class... AN>
-struct map_invalid : public rxo::operator_base<map_invalid_arguments<AN...>> {
- using type = observable<map_invalid_arguments<AN...>, map_invalid<AN...>>;
-};
-template<class... AN>
-using map_invalid_t = typename map_invalid<AN...>::type;
-
-template<class T, class Selector>
-struct map
-{
- typedef rxu::decay_t<T> source_value_type;
- typedef rxu::decay_t<Selector> select_type;
- typedef decltype((*(select_type*)nullptr)(*(source_value_type*)nullptr)) value_type;
- select_type selector;
-
- map(select_type s)
- : selector(std::move(s))
- {
- }
-
- template<class Subscriber>
- struct map_observer
- {
- typedef map_observer<Subscriber> this_type;
- typedef decltype((*(select_type*)nullptr)(*(source_value_type*)nullptr)) value_type;
- typedef rxu::decay_t<Subscriber> dest_type;
- typedef observer<source_value_type, this_type> observer_type;
- dest_type dest;
- mutable select_type selector;
-
- map_observer(dest_type d, select_type s)
- : dest(std::move(d))
- , selector(std::move(s))
- {
- }
- template<class Value>
- void on_next(Value&& v) const {
- auto selected = on_exception(
- [&](){
- return this->selector(std::forward<Value>(v));},
- dest);
- if (selected.empty()) {
- return;
- }
- dest.on_next(std::move(selected.get()));
- }
- void on_error(rxu::error_ptr e) const {
- dest.on_error(e);
- }
- void on_completed() const {
- dest.on_completed();
- }
-
- static subscriber<source_value_type, observer_type> make(dest_type d, select_type s) {
- auto cs = d.get_subscription();
- return make_subscriber<source_value_type>(std::move(cs), observer_type(this_type(std::move(d), std::move(s))));
- }
- };
-
- template<class Subscriber>
- auto operator()(Subscriber dest) const
- -> decltype(map_observer<Subscriber>::make(std::move(dest), selector)) {
- return map_observer<Subscriber>::make(std::move(dest), selector);
- }
-};
-
-}
-
-/*! @copydoc rx-map.hpp
-*/
-template<class... AN>
-auto map(AN&&... an)
- -> operator_factory<map_tag, AN...> {
- return operator_factory<map_tag, AN...>(std::make_tuple(std::forward<AN>(an)...));
-}
-
-/*! @copydoc rx-map.hpp
-*/
-template<class... AN>
-auto transform(AN&&... an)
- -> operator_factory<map_tag, AN...> {
- return operator_factory<map_tag, AN...>(std::make_tuple(std::forward<AN>(an)...));
-}
-
-}
-
-template<>
-struct member_overload<map_tag>
-{
- template<class Observable, class Selector,
- class Enabled = rxu::enable_if_all_true_type_t<
- is_observable<Observable>>,
- class ResolvedSelector = rxu::decay_t<Selector>,
- class SourceValue = rxu::value_type_t<Observable>,
- class Map = rxo::detail::map<SourceValue, ResolvedSelector>,
- class Value = rxu::value_type_t<Map>>
- static auto member(Observable&& o, Selector&& s)
- -> decltype(o.template lift<Value>(Map(std::forward<Selector>(s)))) {
- return o.template lift<Value>(Map(std::forward<Selector>(s)));
- }
-
- template<class... AN>
- static operators::detail::map_invalid_t<AN...> member(const AN...) {
- std::terminate();
- return {};
- static_assert(sizeof...(AN) == 10000, "map takes Selector");
- }
-};
-
-}
-
-#endif