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@ -115,8 +115,8 @@ __ iterator_facade.pdf
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__ iterator_adaptor.pdf
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Both |facade| and |adaptor| as well as many of the `specialized
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adaptors`_ mentioned below have been proposed for standardization,
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and accepted into the first C++ technical report; see our
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adaptors`_ mentioned below have been proposed for standardization;
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see our
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`Standard Proposal For Iterator Facade and Adaptor`__ (PDF__)
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@ -9,6 +9,7 @@
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#ifndef BOOST_FUNCTION_INPUT_ITERATOR
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#define BOOST_FUNCTION_INPUT_ITERATOR
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#include <boost/config.hpp>
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#include <boost/assert.hpp>
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#include <boost/mpl/if.hpp>
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#include <boost/function_types/is_function_pointer.hpp>
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@ -17,6 +18,7 @@
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#include <boost/iterator/iterator_facade.hpp>
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#include <boost/none.hpp>
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#include <boost/optional/optional.hpp>
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#include <boost/utility/result_of.hpp>
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namespace boost {
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@ -28,9 +30,9 @@ namespace iterators {
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class function_input_iterator
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: public iterator_facade<
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function_input_iterator<Function, Input>,
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typename Function::result_type,
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BOOST_DEDUCED_TYPENAME result_of<Function ()>::type,
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single_pass_traversal_tag,
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typename Function::result_type const &
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BOOST_DEDUCED_TYPENAME result_of<Function ()>::type const &
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>
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{
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public:
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@ -46,7 +48,7 @@ namespace iterators {
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++state;
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}
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typename Function::result_type const &
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BOOST_DEDUCED_TYPENAME result_of<Function ()>::type const &
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dereference() const {
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return (value ? value : value = (*f)()).get();
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}
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@ -58,7 +60,7 @@ namespace iterators {
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private:
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Function * f;
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Input state;
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mutable optional<typename Function::result_type> value;
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mutable optional<BOOST_DEDUCED_TYPENAME result_of<Function ()>::type> value;
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};
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template <class Function, class Input>
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@ -11,6 +11,7 @@
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#include <iterator>
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#include <vector>
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#include <boost/config.hpp>
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#include <boost/iterator/function_input_iterator.hpp>
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namespace {
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@ -96,6 +97,23 @@ int main(int argc, char * argv[])
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assert(generated[i] == 42 + i);
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cout << "function iterator test with stateful function object successful." << endl;
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#if !defined(BOOST_NO_CXX11_LAMBDAS) && !defined(BOOST_NO_CXX11_AUTO_DECLARATIONS)
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// test the iterator with lambda expressions
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int num = 42;
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auto lambda_generator = [&num] { return num++; };
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vector<int>().swap(generated);
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copy(
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boost::make_function_input_iterator(lambda_generator, 0),
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boost::make_function_input_iterator(lambda_generator, 10),
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back_inserter(generated)
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);
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assert(generated.size() == 10);
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for(std::size_t i = 0; i != 10; ++i)
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assert(generated[i] == 42 + i);
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cout << "function iterator test with lambda expressions successful." << endl;
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#endif // BOOST_NO_CXX11_LAMBDAS
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return 0;
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}
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@ -33,37 +33,6 @@
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using boost::dummyT;
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struct mult_functor {
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typedef int result_type;
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typedef int argument_type;
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// Functors used with transform_iterator must be
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// DefaultConstructible, as the transform_iterator must be
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// DefaultConstructible to satisfy the requirements for
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// TrivialIterator.
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mult_functor() { }
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mult_functor(int aa) : a(aa) { }
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int operator()(int b) const { return a * b; }
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int a;
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};
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template <class Pair>
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struct select1st_
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: public std::unary_function<Pair, typename Pair::first_type>
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{
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const typename Pair::first_type& operator()(const Pair& x) const {
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return x.first;
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}
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typename Pair::first_type& operator()(Pair& x) const {
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return x.first;
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}
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};
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struct one_or_four {
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bool operator()(dummyT x) const {
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return x.foo() == 1 || x.foo() == 4;
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}
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};
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typedef std::deque<int> storage;
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typedef std::deque<int*> pointer_deque;
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typedef std::set<storage::iterator> iterator_set;
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@ -56,12 +56,24 @@ int main()
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STATIC_ASSERT_SAME(boost::pointee<X*>::type, X);
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STATIC_ASSERT_SAME(boost::pointee<X const*>::type, X const);
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#if defined(BOOST_NO_CXX11_SMART_PTR)
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STATIC_ASSERT_SAME(boost::pointee<std::auto_ptr<int> >::type, int);
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STATIC_ASSERT_SAME(boost::pointee<std::auto_ptr<X> >::type, X);
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STATIC_ASSERT_SAME(boost::pointee<std::auto_ptr<int const> >::type, int const);
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STATIC_ASSERT_SAME(boost::pointee<std::auto_ptr<X const> >::type, X const);
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#else
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STATIC_ASSERT_SAME(boost::pointee<std::unique_ptr<int> >::type, int);
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STATIC_ASSERT_SAME(boost::pointee<std::unique_ptr<X> >::type, X);
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STATIC_ASSERT_SAME(boost::pointee<std::unique_ptr<int const> >::type, int const);
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STATIC_ASSERT_SAME(boost::pointee<std::unique_ptr<X const> >::type, X const);
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#endif
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STATIC_ASSERT_SAME(boost::pointee<std::list<int>::iterator >::type, int);
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STATIC_ASSERT_SAME(boost::pointee<std::list<X>::iterator >::type, X);
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