forked from boostorg/fusion
flatten/flatten_view/ref
This commit is contained in:
Jamboree
@ -1841,6 +1841,50 @@ Constant. Returns a view which is lazily evaluated.
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[endsect]
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[endsect]
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[section flatten]
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[heading Description]
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Returns a new sequence without nested sequences.
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[heading Synopsis]
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template<
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typename Sequence
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>
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typename __result_of_flatten__<Sequence>::type flatten(Sequence& seq);
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template<
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typename Sequence
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>
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typename __result_of_flatten__<Sequence const>::type flatten(Sequence const& seq);
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[table Parameters
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[[Parameter][Requirement][Description]]
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[[`seq`][A model of __forward_sequence__][Operation's argument]]
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]
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[heading Expression Semantics]
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__flatten__(seq);
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[*Return type]:
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* A model of __forward_sequence__.
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[*Semantics]: Returns a new sequence containing all the leaf elements of `seq`.
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[heading Complexity]
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Constant. Returns a view which is lazily evaluated.
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[heading Header]
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#include <boost/fusion/algorithm/transformation/flatten.hpp>
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#include <boost/fusion/include/flatten.hpp>
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[heading Example]
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const __vector__<int, int, __vector__<int, int>, int> vec(1, 2, __make_vector__(3, 4), 5);
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assert(__flatten__(vec) == __make_vector__(1, 2, 3, 4, 5)));
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[endsect]
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[endsect]
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[endsect]
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[section Metafunctions]
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[section Metafunctions]
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@ -2633,6 +2677,44 @@ Constant.
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[endsect]
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[endsect]
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[section flatten]
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[heading Description]
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Returns the result type of __flatten__, given the input sequence type.
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[heading Synopsis]
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template<
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typename Sequence
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>
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struct flatten
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{
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typedef __unspecified__ type;
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};
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[table Parameters
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[[Parameter][Requirement][Description]]
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[[`Sequence`][A model of __forward_sequence__][Operation's argument]]
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]
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[heading Expression Semantics]
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__result_of_flatten__<Sequence>::type
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[*Return type]:
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* A model of __forward_sequence__.
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[*Semantics]: Returns a sequence with all the leaf elements of `Sequence`.
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[heading Complexity]
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Constant.
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[heading Header]
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#include <boost/fusion/algorithm/transformation/flatten.hpp>
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#include <boost/fusion/include/flatten.hpp>
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[endsect]
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[endsect]
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[endsect]
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[endsect]
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[endsect]
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@ -30,7 +30,7 @@
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[def __mpl__ [@http://www.boost.org/libs/mpl/index.html MPL]]
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[def __mpl__ [@http://www.boost.org/libs/mpl/index.html MPL]]
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[def __stl__ [@http://en.wikipedia.org/wiki/Standard_Template_Library STL]]
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[def __stl__ [@http://en.wikipedia.org/wiki/Standard_Template_Library STL]]
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[def __tuple__ [@http://www.boost.org/libs/tuple/doc/tuple_users_guide.html Boost.Tuple]]
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[def __tuple__ [@http://www.boost.org/libs/tuple/doc/tuple_users_guide.html Boost.Tuple]]
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[def __tr1__tuple__ [@http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2002/n1403.pdf TR1 Tuple]]
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[def __tr1__tuple__ [@http://std.dkuug.dk/jtc1/sc22/wg21/docs/papers/2002/n1403.pdf TR1 Tuple]]
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[def __boost_tools__ [@http://www.boost.org/tools/index.html Boost Tools]]
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[def __boost_tools__ [@http://www.boost.org/tools/index.html Boost Tools]]
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[def __spirit_list__ [@https://lists.sourceforge.net/lists/listinfo/spirit-general Spirit Mailing List]]
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[def __spirit_list__ [@https://lists.sourceforge.net/lists/listinfo/spirit-general Spirit Mailing List]]
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[def __spirit_general__ [@news://news.gmane.org/gmane.comp.spirit.general Spirit General NNTP news portal]]
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[def __spirit_general__ [@news://news.gmane.org/gmane.comp.spirit.general Spirit General NNTP news portal]]
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@ -131,6 +131,7 @@
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[def __transform_view__ [link fusion.view.transform_view `transform_view`]]
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[def __transform_view__ [link fusion.view.transform_view `transform_view`]]
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[def __reverse_view__ [link fusion.view.reverse_view `reverse_view`]]
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[def __reverse_view__ [link fusion.view.reverse_view `reverse_view`]]
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[def __zip_view__ [link fusion.view.zip_view `zip_view`]]
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[def __zip_view__ [link fusion.view.zip_view `zip_view`]]
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[def __flatten_view__ [link fusion.view.flatten_view `flatten_view`]]
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[def __array__ [link fusion.adapted.array array]]
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[def __array__ [link fusion.adapted.array array]]
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[def __std_pair__ [link fusion.adapted.std__pair `std::pair`]]
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[def __std_pair__ [link fusion.adapted.std__pair `std::pair`]]
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@ -288,6 +289,8 @@
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[def __result_of_push_back__ [link fusion.algorithm.transformation.metafunctions.push_back `result_of::push_back`]]
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[def __result_of_push_back__ [link fusion.algorithm.transformation.metafunctions.push_back `result_of::push_back`]]
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[def __push_front__ [link fusion.algorithm.transformation.functions.push_front `push_front`]]
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[def __push_front__ [link fusion.algorithm.transformation.functions.push_front `push_front`]]
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[def __result_of_push_front__ [link fusion.algorithm.transformation.metafunctions.push_front `result_of::push_front`]]
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[def __result_of_push_front__ [link fusion.algorithm.transformation.metafunctions.push_front `result_of::push_front`]]
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[def __flatten__ [link fusion.algorithm.transformation.functions.flatten `flatten`]]
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[def __result_of_flatten__ [link fusion.algorithm.transformation.metafunctions.flatten `result_of::flatten`]]
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[def __tr1_tuple_pair__ [link fusion.tuple.pairs `TR1 and std::pair`]]
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[def __tr1_tuple_pair__ [link fusion.tuple.pairs `TR1 and std::pair`]]
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[def __tuple_get__ [link fusion.tuple.class_template_tuple.element_access `get`]]
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[def __tuple_get__ [link fusion.tuple.class_template_tuple.element_access `get`]]
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55
doc/view.qbk
55
doc/view.qbk
@ -549,7 +549,6 @@ of the original Fusion __sequence__
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[endsect]
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[endsect]
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[section repetitive_view]
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[section repetitive_view]
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[heading Description]
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[heading Description]
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@ -615,4 +614,58 @@ printing a `repetitive_view` to `std::cout` is not.
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[endsect]
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[endsect]
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[section flatten_view]
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[heading Description]
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`flatten_view` presents a view which iterates over its elements recursively in depth-first order.
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[heading Header]
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#include <boost/fusion/view/flatten_view.hpp>
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#include <boost/fusion/include/flatten_view.hpp>
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[heading Synopsis]
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template <typename Sequence>
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struct flatten_view;
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[heading Template parameters]
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[table
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[[Parameter] [Description] [Default]]
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[[`Sequence`] [A __forward_sequence__] []]
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]
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[heading Model of]
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* __forward_sequence__
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[variablelist Notation
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[[`F`] [A `flatten_view` type]]
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[[`s`] [An instance of `Sequence`]]
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[[`f`, `f2`] [Instances of `F`]]
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]
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[heading Expression Semantics]
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Semantics of an expression is defined only where it differs from, or is not
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defined in __forward_sequence__.
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[table
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[[Expression] [Semantics]]
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[[`F(s)`] [Creates a `flatten_view` given sequence, `s`.]]
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[[`F(f)`] [Copy constructs a `flatten_view` from another `flatten_view`, `f`.]]
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[[`f = f2`] [Assigns to a `flatten_view`, `f`, from another `flatten_view`, `f2`.]]
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]
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[heading Example]
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typedef __vector__<int, int, __vector__<int, int>, int> sequence_type;
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sequence_type seq;
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__flatten_view__<sequence_type> flattened(seq);
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__copy__(__make_vector__(1, 2, 3, 4, 5), flattened);
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assert(seq == __make_vector__(1, 2, __make_vector__(3, 4), 5));
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[endsect]
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[endsect]
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[endsect]
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@ -27,5 +27,6 @@
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#include <boost/fusion/algorithm/transformation/reverse.hpp>
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#include <boost/fusion/algorithm/transformation/reverse.hpp>
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#include <boost/fusion/algorithm/transformation/transform.hpp>
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#include <boost/fusion/algorithm/transformation/transform.hpp>
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#include <boost/fusion/algorithm/transformation/zip.hpp>
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#include <boost/fusion/algorithm/transformation/zip.hpp>
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#include <boost/fusion/algorithm/transformation/flatten.hpp>
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#endif
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#endif
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44
include/boost/fusion/algorithm/transformation/flatten.hpp
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44
include/boost/fusion/algorithm/transformation/flatten.hpp
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@ -0,0 +1,44 @@
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/*//////////////////////////////////////////////////////////////////////////////
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Copyright (c) 2013 Jamboree
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Distributed under the Boost Software License, Version 1.0. (See accompanying
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file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
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//////////////////////////////////////////////////////////////////////////////*/
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#ifndef BOOST_FUSION_ALGORITHM_FLATTEN_HPP_INCLUDED
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#define BOOST_FUSION_ALGORITHM_FLATTEN_HPP_INCLUDED
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#include <boost/fusion/view/flatten_view.hpp>
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#include <boost/fusion/support/is_sequence.hpp>
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#include <boost/utility/enable_if.hpp>
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namespace boost { namespace fusion { namespace result_of
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{
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template<typename Sequence>
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struct flatten
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{
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typedef flatten_view<Sequence> type;
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};
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}}}
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namespace boost { namespace fusion
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{
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template <typename Sequence>
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inline typename result_of::flatten<Sequence>::type
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flatten(Sequence& view)
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{
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return flatten_view<Sequence>(view);
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}
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template <typename Sequence>
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inline typename result_of::flatten<Sequence const>::type
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flatten(Sequence const& view)
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{
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return flatten_view<Sequence const>(view);
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}
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}}
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#endif
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14
include/boost/fusion/include/flatten.hpp
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14
include/boost/fusion/include/flatten.hpp
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@ -0,0 +1,14 @@
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/*//////////////////////////////////////////////////////////////////////////////
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Copyright (c) 2014 Jamboree
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Distributed under the Boost Software License, Version 1.0. (See accompanying
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file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
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//////////////////////////////////////////////////////////////////////////////*/
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#ifndef FUSION_INCLUDE_FLATTEN
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#define FUSION_INCLUDE_FLATTEN
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#include <boost/fusion/algorithm/transformation/flatten.hpp>
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#endif
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14
include/boost/fusion/include/flatten_view.hpp
Normal file
14
include/boost/fusion/include/flatten_view.hpp
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@ -0,0 +1,14 @@
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/*//////////////////////////////////////////////////////////////////////////////
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Copyright (c) 2014 Jamboree
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Distributed under the Boost Software License, Version 1.0. (See accompanying
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file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
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//////////////////////////////////////////////////////////////////////////////*/
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#ifndef FUSION_INCLUDE_FLATTEN_VIEW
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#define FUSION_INCLUDE_FLATTEN_VIEW
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#include <boost/fusion/view/flatten_view.hpp>
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#endif
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14
include/boost/fusion/include/ref.hpp
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14
include/boost/fusion/include/ref.hpp
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@ -0,0 +1,14 @@
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/*//////////////////////////////////////////////////////////////////////////////
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Copyright (c) 2014 Jamboree
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Distributed under the Boost Software License, Version 1.0. (See accompanying
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file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
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//////////////////////////////////////////////////////////////////////////////*/
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#ifndef FUSION_INCLUDE_REF
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#define FUSION_INCLUDE_REF
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#include <boost/fusion/support/ref.hpp>
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#endif
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@ -21,5 +21,6 @@
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#include <boost/fusion/support/deduce_sequence.hpp>
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#include <boost/fusion/support/deduce_sequence.hpp>
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#include <boost/fusion/support/unused.hpp>
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#include <boost/fusion/support/unused.hpp>
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#include <boost/fusion/support/as_const.hpp>
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#include <boost/fusion/support/as_const.hpp>
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#include <boost/fusion/support/ref.hpp>
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#endif
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#endif
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186
include/boost/fusion/support/ref.hpp
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186
include/boost/fusion/support/ref.hpp
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@ -0,0 +1,186 @@
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|
/*//////////////////////////////////////////////////////////////////////////////
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||||||
|
Copyright (c) 2013 Jamboree
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||||||
|
|
||||||
|
Distributed under the Boost Software License, Version 1.0. (See accompanying
|
||||||
|
file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
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||||||
|
//////////////////////////////////////////////////////////////////////////////*/
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|
#ifndef BOOST_FUSION_SUPPORT_REF_HPP_INCLUDED
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|
#define BOOST_FUSION_SUPPORT_REF_HPP_INCLUDED
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|
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|
#include <boost/ref.hpp>
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#include <boost/mpl/bool.hpp>
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#include <boost/fusion/support/tag_of_fwd.hpp>
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|
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|
namespace boost { namespace fusion
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|
{
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|
struct reference_wrapper_tag;
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|
}}
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|
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|
namespace boost { namespace fusion { namespace traits
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|
{
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|
template<typename T>
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|
struct tag_of<reference_wrapper<T> >
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|
{
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typedef reference_wrapper_tag type;
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|
};
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|
}}}
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|
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|
namespace boost { namespace fusion { namespace extension
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|
{
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template<typename Tag>
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struct category_of_impl;
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template<typename Tag>
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struct begin_impl;
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template<typename Tag>
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struct end_impl;
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template<typename Tag>
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struct at_impl;
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template<typename Tag>
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struct value_at_impl;
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template<typename Tag>
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struct size_impl;
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template<typename Tag>
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struct at_key_impl;
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template<typename Tag>
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||||||
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struct value_at_key_impl;
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||||||
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template<typename Tag>
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struct has_key_impl;
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template<typename Tag>
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struct is_sequence_impl;
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||||||
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template<typename Tag>
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struct is_view_impl;
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||||||
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template<typename Tag>
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||||||
|
struct is_segmented_impl;
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||||||
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|
||||||
|
template<>
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||||||
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struct category_of_impl<reference_wrapper_tag>
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||||||
|
{
|
||||||
|
template<typename Sequence>
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||||||
|
struct apply
|
||||||
|
: category_of_impl<typename traits::tag_of<typename Sequence::type>::type>::
|
||||||
|
template apply<typename Sequence::type>
|
||||||
|
{};
|
||||||
|
};
|
||||||
|
|
||||||
|
template<>
|
||||||
|
struct begin_impl<reference_wrapper_tag>
|
||||||
|
{
|
||||||
|
template<typename Sequence>
|
||||||
|
struct apply
|
||||||
|
: begin_impl<typename traits::tag_of<typename Sequence::type>::type>::
|
||||||
|
template apply<typename Sequence::type>
|
||||||
|
{};
|
||||||
|
};
|
||||||
|
|
||||||
|
template<>
|
||||||
|
struct end_impl<reference_wrapper_tag>
|
||||||
|
{
|
||||||
|
template<typename Sequence>
|
||||||
|
struct apply
|
||||||
|
: end_impl<typename traits::tag_of<typename Sequence::type>::type>::
|
||||||
|
template apply<typename Sequence::type>
|
||||||
|
{};
|
||||||
|
};
|
||||||
|
|
||||||
|
template<>
|
||||||
|
struct at_impl<reference_wrapper_tag>
|
||||||
|
{
|
||||||
|
template<typename Sequence, typename N>
|
||||||
|
struct apply
|
||||||
|
: at_impl<typename traits::tag_of<typename Sequence::type>::type>::
|
||||||
|
template apply<typename Sequence::type, N>
|
||||||
|
{};
|
||||||
|
};
|
||||||
|
|
||||||
|
template<>
|
||||||
|
struct value_at_impl<reference_wrapper_tag>
|
||||||
|
{
|
||||||
|
template<typename Sequence, typename N>
|
||||||
|
struct apply
|
||||||
|
: value_at_impl<typename traits::tag_of<typename Sequence::type>::type>::
|
||||||
|
template apply<typename Sequence::type, N>
|
||||||
|
{};
|
||||||
|
};
|
||||||
|
|
||||||
|
template<>
|
||||||
|
struct size_impl<reference_wrapper_tag>
|
||||||
|
{
|
||||||
|
template<typename Sequence>
|
||||||
|
struct apply
|
||||||
|
: size_impl<typename traits::tag_of<typename Sequence::type>::type>::
|
||||||
|
template apply<typename Sequence::type>
|
||||||
|
{};
|
||||||
|
};
|
||||||
|
|
||||||
|
template<>
|
||||||
|
struct value_at_key_impl<reference_wrapper_tag>
|
||||||
|
{
|
||||||
|
template<typename Sequence, typename Key>
|
||||||
|
struct apply
|
||||||
|
: value_at_key_impl<typename traits::tag_of<typename Sequence::type>::type>::
|
||||||
|
template apply<typename Sequence::type, Key>
|
||||||
|
{};
|
||||||
|
};
|
||||||
|
|
||||||
|
template<>
|
||||||
|
struct at_key_impl<reference_wrapper_tag>
|
||||||
|
{
|
||||||
|
template<typename Sequence, typename Key>
|
||||||
|
struct apply
|
||||||
|
: at_key_impl<typename traits::tag_of<typename Sequence::type>::type>::
|
||||||
|
template apply<typename Sequence::type, Key>
|
||||||
|
{};
|
||||||
|
};
|
||||||
|
|
||||||
|
template<>
|
||||||
|
struct has_key_impl<reference_wrapper_tag>
|
||||||
|
{
|
||||||
|
template<typename Sequence, typename Key>
|
||||||
|
struct apply
|
||||||
|
: has_key_impl<typename traits::tag_of<typename Sequence::type>::type>::
|
||||||
|
template apply<typename Sequence::type, Key>
|
||||||
|
{};
|
||||||
|
};
|
||||||
|
|
||||||
|
template<>
|
||||||
|
struct is_sequence_impl<reference_wrapper_tag>
|
||||||
|
{
|
||||||
|
template<typename T>
|
||||||
|
struct apply
|
||||||
|
: is_sequence_impl<typename traits::tag_of<typename T::type>::type>::
|
||||||
|
template apply<typename T::type>
|
||||||
|
{};
|
||||||
|
};
|
||||||
|
|
||||||
|
template<>
|
||||||
|
struct is_view_impl<reference_wrapper_tag>
|
||||||
|
: is_sequence_impl<reference_wrapper_tag>
|
||||||
|
{};
|
||||||
|
|
||||||
|
template<>
|
||||||
|
struct is_segmented_impl<reference_wrapper_tag>
|
||||||
|
{
|
||||||
|
template<typename T>
|
||||||
|
struct apply
|
||||||
|
: is_segmented_impl<typename traits::tag_of<typename T::type>::type>::
|
||||||
|
template apply<typename T::type>
|
||||||
|
{};
|
||||||
|
};
|
||||||
|
}}}
|
||||||
|
|
||||||
|
|
||||||
|
#endif
|
||||||
|
|
||||||
@ -16,5 +16,6 @@
|
|||||||
#include <boost/fusion/view/reverse_view.hpp>
|
#include <boost/fusion/view/reverse_view.hpp>
|
||||||
#include <boost/fusion/view/transform_view.hpp>
|
#include <boost/fusion/view/transform_view.hpp>
|
||||||
#include <boost/fusion/view/zip_view.hpp>
|
#include <boost/fusion/view/zip_view.hpp>
|
||||||
|
#include <boost/fusion/view/flatten_view.hpp>
|
||||||
|
|
||||||
#endif
|
#endif
|
||||||
|
|||||||
15
include/boost/fusion/view/flatten_view.hpp
Normal file
15
include/boost/fusion/view/flatten_view.hpp
Normal file
@ -0,0 +1,15 @@
|
|||||||
|
/*//////////////////////////////////////////////////////////////////////////////
|
||||||
|
Copyright (c) 2013 Jamboree
|
||||||
|
|
||||||
|
Distributed under the Boost Software License, Version 1.0. (See accompanying
|
||||||
|
file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
|
||||||
|
//////////////////////////////////////////////////////////////////////////////*/
|
||||||
|
#ifndef BOOST_FUSION_SEQUENCE_FLATTEN_VIEW_HPP_INCLUDED
|
||||||
|
#define BOOST_FUSION_SEQUENCE_FLATTEN_VIEW_HPP_INCLUDED
|
||||||
|
|
||||||
|
|
||||||
|
#include <boost/fusion/view/flatten_view/flatten_view.hpp>
|
||||||
|
#include <boost/fusion/view/flatten_view/flatten_view_iterator.hpp>
|
||||||
|
|
||||||
|
|
||||||
|
#endif
|
||||||
127
include/boost/fusion/view/flatten_view/flatten_view.hpp
Normal file
127
include/boost/fusion/view/flatten_view/flatten_view.hpp
Normal file
@ -0,0 +1,127 @@
|
|||||||
|
/*//////////////////////////////////////////////////////////////////////////////
|
||||||
|
Copyright (c) 2013 Jamboree
|
||||||
|
|
||||||
|
Distributed under the Boost Software License, Version 1.0. (See accompanying
|
||||||
|
file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
|
||||||
|
//////////////////////////////////////////////////////////////////////////////*/
|
||||||
|
#ifndef BOOST_FUSION_FLATTEN_VIEW_HPP_INCLUDED
|
||||||
|
#define BOOST_FUSION_FLATTEN_VIEW_HPP_INCLUDED
|
||||||
|
|
||||||
|
|
||||||
|
#include <boost/mpl/bool.hpp>
|
||||||
|
#include <boost/mpl/single_view.hpp>
|
||||||
|
#include <boost/fusion/support/detail/access.hpp>
|
||||||
|
#include <boost/fusion/support/is_view.hpp>
|
||||||
|
#include <boost/fusion/support/category_of.hpp>
|
||||||
|
#include <boost/fusion/support/sequence_base.hpp>
|
||||||
|
#include <boost/fusion/sequence/intrinsic/begin.hpp>
|
||||||
|
#include <boost/fusion/sequence/intrinsic/end.hpp>
|
||||||
|
#include <boost/fusion/view/flatten_view/flatten_view_iterator.hpp>
|
||||||
|
|
||||||
|
|
||||||
|
namespace boost { namespace fusion
|
||||||
|
{
|
||||||
|
struct forward_traversal_tag;
|
||||||
|
struct flatten_view_tag;
|
||||||
|
|
||||||
|
template <typename Sequence>
|
||||||
|
struct flatten_view
|
||||||
|
: sequence_base<flatten_view<Sequence> >
|
||||||
|
{
|
||||||
|
typedef flatten_view_tag fusion_tag;
|
||||||
|
typedef fusion_sequence_tag tag; // this gets picked up by MPL
|
||||||
|
typedef mpl::true_ is_view;
|
||||||
|
typedef forward_traversal_tag category;
|
||||||
|
|
||||||
|
typedef Sequence sequence_type;
|
||||||
|
typedef typename result_of::begin<Sequence>::type first_type;
|
||||||
|
typedef typename result_of::end<Sequence>::type last_type;
|
||||||
|
|
||||||
|
explicit flatten_view(Sequence& seq)
|
||||||
|
: seq(seq)
|
||||||
|
{}
|
||||||
|
|
||||||
|
first_type first() const { return fusion::begin(seq); }
|
||||||
|
last_type last() const { return fusion::end(seq); }
|
||||||
|
|
||||||
|
typename mpl::if_<traits::is_view<Sequence>, Sequence, Sequence&>::type seq;
|
||||||
|
};
|
||||||
|
}}
|
||||||
|
|
||||||
|
namespace boost { namespace fusion { namespace extension
|
||||||
|
{
|
||||||
|
template<>
|
||||||
|
struct begin_impl<flatten_view_tag>
|
||||||
|
{
|
||||||
|
template<typename Sequence>
|
||||||
|
struct apply
|
||||||
|
{
|
||||||
|
typedef typename Sequence::first_type first_type;
|
||||||
|
|
||||||
|
typedef typename
|
||||||
|
result_of::begin<
|
||||||
|
mpl::single_view<
|
||||||
|
typename Sequence::sequence_type> >::type
|
||||||
|
root_iterator;
|
||||||
|
|
||||||
|
typedef
|
||||||
|
detail::seek_descent<root_iterator, first_type>
|
||||||
|
seek_descent;
|
||||||
|
|
||||||
|
typedef typename seek_descent::type type;
|
||||||
|
|
||||||
|
static inline
|
||||||
|
type call(Sequence& seq)
|
||||||
|
{
|
||||||
|
return seek_descent::apply(root_iterator(), seq.first());
|
||||||
|
}
|
||||||
|
};
|
||||||
|
};
|
||||||
|
|
||||||
|
template<>
|
||||||
|
struct end_impl<flatten_view_tag>
|
||||||
|
{
|
||||||
|
template<typename Sequence>
|
||||||
|
struct apply
|
||||||
|
{
|
||||||
|
typedef typename Sequence::last_type last_type;
|
||||||
|
|
||||||
|
typedef typename
|
||||||
|
result_of::end<
|
||||||
|
mpl::single_view<
|
||||||
|
typename Sequence::sequence_type> >::type
|
||||||
|
type;
|
||||||
|
|
||||||
|
static inline
|
||||||
|
type call(Sequence&)
|
||||||
|
{
|
||||||
|
return type();
|
||||||
|
}
|
||||||
|
};
|
||||||
|
};
|
||||||
|
|
||||||
|
template<>
|
||||||
|
struct size_impl<flatten_view_tag>
|
||||||
|
{
|
||||||
|
template <typename Sequence>
|
||||||
|
struct apply
|
||||||
|
: result_of::distance
|
||||||
|
<
|
||||||
|
typename result_of::begin<Sequence>::type
|
||||||
|
, typename result_of::end<Sequence>::type
|
||||||
|
>
|
||||||
|
{};
|
||||||
|
};
|
||||||
|
|
||||||
|
template<>
|
||||||
|
struct empty_impl<flatten_view_tag>
|
||||||
|
{
|
||||||
|
template <typename Sequence>
|
||||||
|
struct apply
|
||||||
|
: result_of::empty<typename Sequence::sequence_type>
|
||||||
|
{};
|
||||||
|
};
|
||||||
|
}}}
|
||||||
|
|
||||||
|
|
||||||
|
#endif
|
||||||
199
include/boost/fusion/view/flatten_view/flatten_view_iterator.hpp
Normal file
199
include/boost/fusion/view/flatten_view/flatten_view_iterator.hpp
Normal file
@ -0,0 +1,199 @@
|
|||||||
|
/*//////////////////////////////////////////////////////////////////////////////
|
||||||
|
Copyright (c) 2013 Jamboree
|
||||||
|
|
||||||
|
Distributed under the Boost Software License, Version 1.0. (See accompanying
|
||||||
|
file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
|
||||||
|
//////////////////////////////////////////////////////////////////////////////*/
|
||||||
|
#ifndef BOOST_FUSION_FLATTEN_VIEW_ITERATOR_HPP_INCLUDED
|
||||||
|
#define BOOST_FUSION_FLATTEN_VIEW_ITERATOR_HPP_INCLUDED
|
||||||
|
|
||||||
|
|
||||||
|
#include <boost/mpl/bool.hpp>
|
||||||
|
#include <boost/mpl/eval_if.hpp>
|
||||||
|
#include <boost/type_traits/remove_reference.hpp>
|
||||||
|
#include <boost/fusion/container/list/cons.hpp>
|
||||||
|
#include <boost/fusion/support/unused.hpp>
|
||||||
|
#include <boost/fusion/include/equal_to.hpp>
|
||||||
|
#include <boost/fusion/iterator/next.hpp>
|
||||||
|
#include <boost/fusion/iterator/deref.hpp>
|
||||||
|
#include <boost/fusion/iterator/value_of.hpp>
|
||||||
|
|
||||||
|
|
||||||
|
namespace boost { namespace fusion
|
||||||
|
{
|
||||||
|
struct forward_traversal_tag;
|
||||||
|
struct flatten_view_iterator_tag;
|
||||||
|
|
||||||
|
template<class First, class Base>
|
||||||
|
struct flatten_view_iterator
|
||||||
|
: iterator_base<flatten_view_iterator<First, Base> >
|
||||||
|
{
|
||||||
|
typedef flatten_view_iterator_tag fusion_tag;
|
||||||
|
typedef forward_traversal_tag category;
|
||||||
|
|
||||||
|
typedef convert_iterator<First> first_converter;
|
||||||
|
typedef typename first_converter::type first_type;
|
||||||
|
typedef Base base_type;
|
||||||
|
|
||||||
|
flatten_view_iterator(First const& first, Base const& base)
|
||||||
|
: first(first), base(base)
|
||||||
|
{}
|
||||||
|
|
||||||
|
first_type first;
|
||||||
|
base_type base;
|
||||||
|
};
|
||||||
|
}}
|
||||||
|
|
||||||
|
namespace boost { namespace fusion { namespace detail
|
||||||
|
{
|
||||||
|
template<class Iterator, class = void>
|
||||||
|
struct make_descent_cons
|
||||||
|
{
|
||||||
|
typedef cons<Iterator> type;
|
||||||
|
|
||||||
|
static inline type apply(Iterator const& it)
|
||||||
|
{
|
||||||
|
return type(it);
|
||||||
|
}
|
||||||
|
};
|
||||||
|
|
||||||
|
template<class Iterator>
|
||||||
|
struct make_descent_cons<Iterator,
|
||||||
|
typename enable_if<traits::is_sequence<
|
||||||
|
typename result_of::value_of<Iterator>::type> >::type>
|
||||||
|
{
|
||||||
|
// we use 'value_of' above for convenience, assuming the value won't be reference,
|
||||||
|
// while we must use the regular 'deref' here for const issues...
|
||||||
|
typedef typename
|
||||||
|
remove_reference<typename result_of::deref<Iterator>::type>::type
|
||||||
|
sub_sequence;
|
||||||
|
|
||||||
|
typedef typename
|
||||||
|
result_of::begin<sub_sequence>::type
|
||||||
|
sub_begin;
|
||||||
|
|
||||||
|
typedef cons<Iterator, typename make_descent_cons<sub_begin>::type> type;
|
||||||
|
|
||||||
|
static inline type apply(Iterator const& it)
|
||||||
|
{
|
||||||
|
return type(it, make_descent_cons<sub_begin>::apply(
|
||||||
|
fusion::begin(*it)));
|
||||||
|
}
|
||||||
|
};
|
||||||
|
|
||||||
|
template<class Cons, class Base>
|
||||||
|
struct build_flatten_view_iterator;
|
||||||
|
|
||||||
|
template<class Car, class Base>
|
||||||
|
struct build_flatten_view_iterator<cons<Car>, Base>
|
||||||
|
{
|
||||||
|
typedef flatten_view_iterator<Car, Base> type;
|
||||||
|
|
||||||
|
static inline type apply(cons<Car> const& cons, Base const& base)
|
||||||
|
{
|
||||||
|
return type(cons.car, base);
|
||||||
|
}
|
||||||
|
};
|
||||||
|
|
||||||
|
template<class Car, class Cdr, class Base>
|
||||||
|
struct build_flatten_view_iterator<cons<Car, Cdr>, Base>
|
||||||
|
{
|
||||||
|
typedef flatten_view_iterator<Car, Base> next_base;
|
||||||
|
typedef build_flatten_view_iterator<Cdr, next_base> next;
|
||||||
|
typedef typename next::type type;
|
||||||
|
|
||||||
|
static inline type apply(cons<Car, Cdr> const& cons, Base const& base)
|
||||||
|
{
|
||||||
|
return next::apply(cons.cdr, next_base(cons.car, base));
|
||||||
|
}
|
||||||
|
};
|
||||||
|
|
||||||
|
template<class Base, class Iterator, class = void>
|
||||||
|
struct seek_descent
|
||||||
|
{
|
||||||
|
typedef make_descent_cons<Iterator> make_descent_cons_;
|
||||||
|
typedef typename make_descent_cons_::type cons_type;
|
||||||
|
typedef
|
||||||
|
build_flatten_view_iterator<cons_type, Base>
|
||||||
|
build_flatten_view_iterator_;
|
||||||
|
typedef typename build_flatten_view_iterator_::type type;
|
||||||
|
|
||||||
|
static inline type apply(Base const& base, Iterator const& it)
|
||||||
|
{
|
||||||
|
return build_flatten_view_iterator_::apply(
|
||||||
|
make_descent_cons_::apply(it), base);
|
||||||
|
}
|
||||||
|
};
|
||||||
|
|
||||||
|
template<class Base, class Iterator>
|
||||||
|
struct seek_descent<Base, Iterator,
|
||||||
|
typename enable_if<
|
||||||
|
result_of::equal_to<Iterator, typename result_of::end<
|
||||||
|
typename result_of::value_of<Base>::type>::type> >::type>
|
||||||
|
{
|
||||||
|
typedef typename result_of::next<Base>::type type;
|
||||||
|
|
||||||
|
static inline type apply(Base const& base, Iterator const&)
|
||||||
|
{
|
||||||
|
return fusion::next(base);
|
||||||
|
}
|
||||||
|
};
|
||||||
|
}}}
|
||||||
|
|
||||||
|
namespace boost { namespace fusion { namespace extension
|
||||||
|
{
|
||||||
|
template<>
|
||||||
|
struct next_impl<flatten_view_iterator_tag>
|
||||||
|
{
|
||||||
|
template<typename Iterator>
|
||||||
|
struct apply
|
||||||
|
{
|
||||||
|
typedef typename Iterator::first_type first_type;
|
||||||
|
typedef typename Iterator::base_type base_type;
|
||||||
|
typedef typename result_of::next<first_type>::type next_type;
|
||||||
|
|
||||||
|
typedef detail::seek_descent<base_type, next_type> seek_descent;
|
||||||
|
typedef typename seek_descent::type type;
|
||||||
|
|
||||||
|
static inline
|
||||||
|
type call(Iterator const& it)
|
||||||
|
{
|
||||||
|
return seek_descent::apply(it.base, fusion::next(it.first));
|
||||||
|
}
|
||||||
|
};
|
||||||
|
};
|
||||||
|
|
||||||
|
template<>
|
||||||
|
struct deref_impl<flatten_view_iterator_tag>
|
||||||
|
{
|
||||||
|
template<typename Iterator>
|
||||||
|
struct apply
|
||||||
|
{
|
||||||
|
typedef typename
|
||||||
|
result_of::deref<typename Iterator::first_type>::type
|
||||||
|
type;
|
||||||
|
|
||||||
|
static inline
|
||||||
|
type call(Iterator const& it)
|
||||||
|
{
|
||||||
|
return *it.first;
|
||||||
|
}
|
||||||
|
};
|
||||||
|
};
|
||||||
|
|
||||||
|
template<>
|
||||||
|
struct value_of_impl<flatten_view_iterator_tag>
|
||||||
|
{
|
||||||
|
template<typename Iterator>
|
||||||
|
struct apply
|
||||||
|
{
|
||||||
|
typedef typename
|
||||||
|
result_of::value_of<typename Iterator::first_type>::type
|
||||||
|
type;
|
||||||
|
};
|
||||||
|
};
|
||||||
|
}}}
|
||||||
|
|
||||||
|
|
||||||
|
#endif
|
||||||
|
|
||||||
@ -54,6 +54,7 @@ project
|
|||||||
[ run algorithm/zip.cpp : : : : ]
|
[ run algorithm/zip.cpp : : : : ]
|
||||||
[ run algorithm/zip2.cpp : : : : ]
|
[ run algorithm/zip2.cpp : : : : ]
|
||||||
[ run algorithm/zip_ignore.cpp : : : : ]
|
[ run algorithm/zip_ignore.cpp : : : : ]
|
||||||
|
[ run algorithm/flatten.cpp : : : : ]
|
||||||
|
|
||||||
[ run sequence/as_list.cpp : : : : ]
|
[ run sequence/as_list.cpp : : : : ]
|
||||||
[ run sequence/as_map.cpp : : : : ]
|
[ run sequence/as_map.cpp : : : : ]
|
||||||
@ -151,6 +152,7 @@ project
|
|||||||
[ run sequence/define_assoc_tpl_struct.cpp : : : : ]
|
[ run sequence/define_assoc_tpl_struct.cpp : : : : ]
|
||||||
[ run sequence/std_tuple_iterator.cpp : : : : ]
|
[ run sequence/std_tuple_iterator.cpp : : : : ]
|
||||||
[ run sequence/ref_vector.cpp : : : : ]
|
[ run sequence/ref_vector.cpp : : : : ]
|
||||||
|
[ run sequence/flatten_view.cpp : : : : ]
|
||||||
|
|
||||||
[ run functional/fused.cpp : : : : ]
|
[ run functional/fused.cpp : : : : ]
|
||||||
[ run functional/fused_function_object.cpp : : : : ]
|
[ run functional/fused_function_object.cpp : : : : ]
|
||||||
|
|||||||
57
test/algorithm/flatten.cpp
Normal file
57
test/algorithm/flatten.cpp
Normal file
@ -0,0 +1,57 @@
|
|||||||
|
/*//////////////////////////////////////////////////////////////////////////////
|
||||||
|
Copyright (c) 2013 Jamboree
|
||||||
|
|
||||||
|
Distributed under the Boost Software License, Version 1.0. (See accompanying
|
||||||
|
file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
|
||||||
|
//////////////////////////////////////////////////////////////////////////////*/
|
||||||
|
#include <boost/detail/lightweight_test.hpp>
|
||||||
|
#include <boost/fusion/container/vector/vector.hpp>
|
||||||
|
#include <boost/fusion/sequence/io/out.hpp>
|
||||||
|
#include <boost/fusion/sequence/comparison/equal_to.hpp>
|
||||||
|
#include <boost/fusion/container/generation/make_vector.hpp>
|
||||||
|
#include <boost/fusion/sequence/intrinsic/begin.hpp>
|
||||||
|
#include <boost/fusion/sequence/intrinsic/end.hpp>
|
||||||
|
#include <boost/fusion/sequence/intrinsic/at.hpp>
|
||||||
|
#include <boost/fusion/sequence/intrinsic/size.hpp>
|
||||||
|
#include <boost/fusion/iterator/advance.hpp>
|
||||||
|
#include <boost/fusion/iterator/deref.hpp>
|
||||||
|
#include <boost/fusion/iterator/distance.hpp>
|
||||||
|
#include <boost/fusion/algorithm/auxiliary/copy.hpp>
|
||||||
|
#include <boost/fusion/algorithm/transformation/flatten.hpp>
|
||||||
|
|
||||||
|
|
||||||
|
int main()
|
||||||
|
{
|
||||||
|
using namespace boost::fusion;
|
||||||
|
|
||||||
|
{
|
||||||
|
typedef vector<int, int, vector<int, int>, int> sequence_type;
|
||||||
|
sequence_type seq(1, 2, make_vector(3, 4), 5);
|
||||||
|
|
||||||
|
BOOST_TEST((boost::fusion::size(flatten(seq)) == 5));
|
||||||
|
}
|
||||||
|
|
||||||
|
{
|
||||||
|
typedef vector<int, int, vector<int, int>, int> sequence_type;
|
||||||
|
sequence_type seq(1, 2, make_vector(3, 4), 5);
|
||||||
|
std::cout << flatten(seq) << std::endl;
|
||||||
|
BOOST_TEST((flatten(seq) == make_vector(1, 2, 3, 4, 5)));
|
||||||
|
}
|
||||||
|
|
||||||
|
{
|
||||||
|
std::cout << flatten(make_vector(1, 2, make_vector(3, 4), 5)) << std::endl;
|
||||||
|
BOOST_TEST((flatten(make_vector(1, 2, make_vector(3, 4), 5)) == make_vector(1, 2, 3, 4, 5)));
|
||||||
|
}
|
||||||
|
|
||||||
|
{
|
||||||
|
typedef vector<int, int, vector<int, int>, int> sequence_type;
|
||||||
|
sequence_type seq;
|
||||||
|
result_of::flatten<sequence_type>::type flat(flatten(seq));
|
||||||
|
copy(make_vector(1, 2, 3, 4, 5), flat);
|
||||||
|
std::cout << seq << std::endl;
|
||||||
|
BOOST_TEST((seq == make_vector(1, 2, make_vector(3, 4), 5)));
|
||||||
|
}
|
||||||
|
|
||||||
|
return boost::report_errors();
|
||||||
|
}
|
||||||
|
|
||||||
56
test/sequence/flatten_view.cpp
Normal file
56
test/sequence/flatten_view.cpp
Normal file
@ -0,0 +1,56 @@
|
|||||||
|
/*//////////////////////////////////////////////////////////////////////////////
|
||||||
|
Copyright (c) 2013 Jamboree
|
||||||
|
|
||||||
|
Distributed under the Boost Software License, Version 1.0. (See accompanying
|
||||||
|
file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
|
||||||
|
//////////////////////////////////////////////////////////////////////////////*/
|
||||||
|
#include <boost/detail/lightweight_test.hpp>
|
||||||
|
#include <boost/fusion/container/vector/vector.hpp>
|
||||||
|
#include <boost/fusion/view/flatten_view/flatten_view.hpp>
|
||||||
|
#include <boost/fusion/sequence/io/out.hpp>
|
||||||
|
#include <boost/fusion/sequence/comparison/equal_to.hpp>
|
||||||
|
#include <boost/fusion/container/generation/make_vector.hpp>
|
||||||
|
#include <boost/fusion/sequence/intrinsic/begin.hpp>
|
||||||
|
#include <boost/fusion/sequence/intrinsic/end.hpp>
|
||||||
|
#include <boost/fusion/sequence/intrinsic/at.hpp>
|
||||||
|
#include <boost/fusion/sequence/intrinsic/size.hpp>
|
||||||
|
#include <boost/fusion/iterator/advance.hpp>
|
||||||
|
#include <boost/fusion/iterator/deref.hpp>
|
||||||
|
#include <boost/fusion/iterator/distance.hpp>
|
||||||
|
#include <boost/fusion/algorithm/auxiliary/copy.hpp>
|
||||||
|
|
||||||
|
|
||||||
|
int main()
|
||||||
|
{
|
||||||
|
using namespace boost::fusion;
|
||||||
|
|
||||||
|
{
|
||||||
|
typedef vector<int, int, vector<int, int>, int> sequence_type;
|
||||||
|
sequence_type seq(1, 2, make_vector(3, 4), 5);
|
||||||
|
flatten_view<sequence_type> flattened(seq);
|
||||||
|
|
||||||
|
BOOST_TEST((boost::fusion::size(flattened) == 5));
|
||||||
|
BOOST_TEST((boost::fusion::distance(boost::fusion::begin(flattened), boost::fusion::end(flattened)) == 5));
|
||||||
|
}
|
||||||
|
|
||||||
|
{
|
||||||
|
typedef vector<int, int, vector<int, int>, int> sequence_type;
|
||||||
|
sequence_type seq(1, 2, make_vector(3, 4), 5);
|
||||||
|
flatten_view<sequence_type> flattened(seq);
|
||||||
|
std::cout << flattened << std::endl;
|
||||||
|
BOOST_TEST((flattened == make_vector(1, 2, 3, 4, 5)));
|
||||||
|
BOOST_TEST((*advance_c<2>(boost::fusion::begin(flattened)) == 3));
|
||||||
|
}
|
||||||
|
|
||||||
|
{
|
||||||
|
typedef vector<int, int, vector<int, int>, int> sequence_type;
|
||||||
|
sequence_type seq;
|
||||||
|
flatten_view<sequence_type> flattened(seq);
|
||||||
|
copy(make_vector(1, 2, 3, 4, 5), flattened);
|
||||||
|
std::cout << seq << std::endl;
|
||||||
|
BOOST_TEST((seq == make_vector(1, 2, make_vector(3, 4), 5)));
|
||||||
|
}
|
||||||
|
|
||||||
|
return boost::report_errors();
|
||||||
|
}
|
||||||
|
|
||||||
Reference in New Issue
Block a user