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author | Grigoriy Chudnov <g.chudnov@gmail.com> | 2017-01-08 20:40:49 +0300 |
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committer | Kirk Shoop <kirk.shoop@microsoft.com> | 2017-01-08 10:38:57 -0800 |
commit | a5a3f310d3358aa3628a694c44e45d746a193470 (patch) | |
tree | 85b5c14ae6bfeeac31dc385ae84cb110a0e0bd65 /Rx/v2 | |
parent | edd7d06673589ec3e2291bfad4f042f90e2cc25d (diff) | |
download | RxCpp-a5a3f310d3358aa3628a694c44e45d746a193470.tar.gz |
decouple skip_last from observable
Diffstat (limited to 'Rx/v2')
-rw-r--r-- | Rx/v2/src/rxcpp/operators/rx-skip_last.hpp | 72 | ||||
-rw-r--r-- | Rx/v2/src/rxcpp/rx-includes.hpp | 1 | ||||
-rw-r--r-- | Rx/v2/src/rxcpp/rx-observable.hpp | 27 | ||||
-rw-r--r-- | Rx/v2/src/rxcpp/rx-operators.hpp | 8 | ||||
-rw-r--r-- | Rx/v2/test/operators/skip_last.cpp | 5 |
5 files changed, 72 insertions, 41 deletions
diff --git a/Rx/v2/src/rxcpp/operators/rx-skip_last.hpp b/Rx/v2/src/rxcpp/operators/rx-skip_last.hpp index 1a9681a..6641bd8 100644 --- a/Rx/v2/src/rxcpp/operators/rx-skip_last.hpp +++ b/Rx/v2/src/rxcpp/operators/rx-skip_last.hpp @@ -2,6 +2,21 @@ #pragma once +/*! \file rx-skip_last.hpp + + \brief Make new observable with skipped last count items from this observable. + + \tparam Count the type of the items counter. + + \param t the number of last items to skip. + + \return An observable that is identical to the source observable except that it does not emit the last t items that the source observable emits. + + \sample + \snippet skip_last.cpp skip_last sample + \snippet output.txt skip_last sample +*/ + #if !defined(RXCPP_OPERATORS_RX_SKIP_LAST_HPP) #define RXCPP_OPERATORS_RX_SKIP_LAST_HPP @@ -13,6 +28,16 @@ namespace operators { namespace detail { +template<class... AN> +struct skip_last_invalid_arguments {}; + +template<class... AN> +struct skip_last_invalid : public rxo::operator_base<skip_last_invalid_arguments<AN...>> { + using type = observable<skip_last_invalid_arguments<AN...>, skip_last_invalid<AN...>>; +}; +template<class... AN> +using skip_last_invalid_t = typename skip_last_invalid<AN...>::type; + template<class T, class Observable, class Count> struct skip_last : public operator_base<T> { @@ -89,31 +114,40 @@ struct skip_last : public operator_base<T> } }; -template<class T> -class skip_last_factory -{ - typedef rxu::decay_t<T> count_type; - count_type count; -public: - skip_last_factory(count_type t) : count(std::move(t)) {} - template<class Observable> - auto operator()(Observable&& source) - -> observable<rxu::value_type_t<rxu::decay_t<Observable>>, skip_last<rxu::value_type_t<rxu::decay_t<Observable>>, Observable, count_type>> { - return observable<rxu::value_type_t<rxu::decay_t<Observable>>, skip_last<rxu::value_type_t<rxu::decay_t<Observable>>, Observable, count_type>>( - skip_last<rxu::value_type_t<rxu::decay_t<Observable>>, Observable, count_type>(std::forward<Observable>(source), count)); - } -}; - } -template<class T> -auto skip_last(T&& t) - -> detail::skip_last_factory<T> { - return detail::skip_last_factory<T>(std::forward<T>(t)); +/*! @copydoc rx-skip_last.hpp +*/ +template<class... AN> +auto skip_last(AN&&... an) + -> operator_factory<skip_last_tag, AN...> { + return operator_factory<skip_last_tag, AN...>(std::make_tuple(std::forward<AN>(an)...)); } } +template<> +struct member_overload<skip_last_tag> +{ + template<class Observable, class Count, + class Enabled = rxu::enable_if_all_true_type_t< + is_observable<Observable>>, + class SourceValue = rxu::value_type_t<Observable>, + class SkipLast = rxo::detail::skip_last<SourceValue, rxu::decay_t<Observable>, rxu::decay_t<Count>>, + class Value = rxu::value_type_t<SkipLast>, + class Result = observable<Value, SkipLast>> + static Result member(Observable&& o, Count&& c) { + return Result(SkipLast(std::forward<Observable>(o), std::forward<Count>(c))); + } + + template<class... AN> + static operators::detail::skip_last_invalid_t<AN...> member(AN...) { + std::terminate(); + return {}; + static_assert(sizeof...(AN) == 10000, "skip_last takes (Count)"); + } +}; + } #endif diff --git a/Rx/v2/src/rxcpp/rx-includes.hpp b/Rx/v2/src/rxcpp/rx-includes.hpp index 2c565f9..7effb4b 100644 --- a/Rx/v2/src/rxcpp/rx-includes.hpp +++ b/Rx/v2/src/rxcpp/rx-includes.hpp @@ -208,6 +208,7 @@ #include "operators/rx-sample_time.hpp" #include "operators/rx-sequence_equal.hpp" #include "operators/rx-skip.hpp" +#include "operators/rx-skip_last.hpp" #include "operators/rx-take.hpp" #include "operators/rx-take_last.hpp" #include "operators/rx-take_until.hpp" diff --git a/Rx/v2/src/rxcpp/rx-observable.hpp b/Rx/v2/src/rxcpp/rx-observable.hpp index 1179d74..57a704e 100644 --- a/Rx/v2/src/rxcpp/rx-observable.hpp +++ b/Rx/v2/src/rxcpp/rx-observable.hpp @@ -1997,33 +1997,22 @@ public: */ template<class... AN> auto skip(AN... an) const - /// \cond SHOW_SERVICE_MEMBERS - -> decltype(observable_member(skip_tag{}, *(this_type*)nullptr, std::forward<AN>(an)...)) - /// \endcond + /// \cond SHOW_SERVICE_MEMBERS + -> decltype(observable_member(skip_tag{}, *(this_type*)nullptr, std::forward<AN>(an)...)) + /// \endcond { return observable_member(skip_tag{}, *this, std::forward<AN>(an)...); } - /*! Make new observable with skipped last count items from this observable. - - \tparam Count the type of the items counter - - \param t the number of last items to skip - - \return An observable that is identical to the source observable except that it does not emit the last t items that the source observable emits. - - \sample - \snippet skip_last.cpp skip_last sample - \snippet output.txt skip_last sample + /*! @copydoc rx-skip_last.hpp */ - template<class Count> - auto skip_last(Count t) const + template<class... AN> + auto skip_last(AN... an) const /// \cond SHOW_SERVICE_MEMBERS - -> observable<T, rxo::detail::skip_last<T, this_type, Count>> + -> decltype(observable_member(skip_last_tag{}, *(this_type*)nullptr, std::forward<AN>(an)...)) /// \endcond { - return observable<T, rxo::detail::skip_last<T, this_type, Count>>( - rxo::detail::skip_last<T, this_type, Count>(*this, t)); + return observable_member(skip_last_tag{}, *this, std::forward<AN>(an)...); } /*! Make new observable with items skipped until on_next occurs on the trigger observable diff --git a/Rx/v2/src/rxcpp/rx-operators.hpp b/Rx/v2/src/rxcpp/rx-operators.hpp index 4946af6..2469a23 100644 --- a/Rx/v2/src/rxcpp/rx-operators.hpp +++ b/Rx/v2/src/rxcpp/rx-operators.hpp @@ -106,7 +106,6 @@ public: #include "operators/rx-ref_count.hpp" #include "operators/rx-replay.hpp" #include "operators/rx-scan.hpp" -#include "operators/rx-skip_last.hpp" #include "operators/rx-skip_until.hpp" #include "operators/rx-start_with.hpp" #include "operators/rx-subscribe.hpp" @@ -318,6 +317,13 @@ struct skip_tag { }; }; +struct skip_last_tag { + template<class Included> + struct include_header{ + static_assert(Included::value, "missing include: please #include <rxcpp/operators/rx-skip_last.hpp>"); + }; +}; + struct take_tag { template<class Included> struct include_header{ diff --git a/Rx/v2/test/operators/skip_last.cpp b/Rx/v2/test/operators/skip_last.cpp index f67e965..7da7aee 100644 --- a/Rx/v2/test/operators/skip_last.cpp +++ b/Rx/v2/test/operators/skip_last.cpp @@ -1,4 +1,5 @@ #include "../test.h" +#include <rxcpp/operators/rx-skip_last.hpp> SCENARIO("skip last 0", "[skip_last][operators]"){ GIVEN("a source"){ @@ -20,9 +21,9 @@ SCENARIO("skip last 0", "[skip_last][operators]"){ auto res = w.start( [xs]() { return xs - .skip_last(0) + | rxo::skip_last(0) // forget type to workaround lambda deduction bug on msvc 2013 - .as_dynamic(); + | rxo::as_dynamic(); } ); |