diff -r 666f914201fb -r 2fe1408b6811 epoc32/include/stdapis/boost/iterator/transform_iterator.hpp --- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/epoc32/include/stdapis/boost/iterator/transform_iterator.hpp Tue Mar 16 16:12:26 2010 +0000 @@ -0,0 +1,188 @@ +// (C) Copyright David Abrahams 2002. +// (C) Copyright Jeremy Siek 2002. +// (C) Copyright Thomas Witt 2002. +// 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_TRANSFORM_ITERATOR_23022003THW_HPP +#define BOOST_TRANSFORM_ITERATOR_23022003THW_HPP + +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include + +#if BOOST_WORKAROUND(BOOST_MSVC, BOOST_TESTED_AT(1310)) +# include + +#endif +#include + + +namespace boost +{ + template + class transform_iterator; + + namespace detail + { + + template + struct function_object_result + { + typedef typename UnaryFunction::result_type type; + }; + +#ifndef BOOST_NO_TEMPLATE_PARTIAL_SPECIALIZATION + template + struct function_object_result + { + typedef Return type; + }; +#endif + + // Compute the iterator_adaptor instantiation to be used for transform_iterator + template + struct transform_iterator_base + { + private: + // By default, dereferencing the iterator yields the same as + // the function. Do we need to adjust the way + // function_object_result is computed for the standard + // proposal (e.g. using Doug's result_of)? + typedef typename ia_dflt_help< + Reference + , function_object_result + >::type reference; + + // To get the default for Value: remove any reference on the + // result type, but retain any constness to signal + // non-writability. Note that if we adopt Thomas' suggestion + // to key non-writability *only* on the Reference argument, + // we'd need to strip constness here as well. + typedef typename ia_dflt_help< + Value + , remove_reference + >::type cv_value_type; + + public: + typedef iterator_adaptor< + transform_iterator + , Iterator + , cv_value_type + , use_default // Leave the traversal category alone + , reference + > type; + }; + } + + template + class transform_iterator + : public detail::transform_iterator_base::type + { + typedef typename + detail::transform_iterator_base::type + super_t; + + friend class iterator_core_access; + + public: + transform_iterator() { } + + transform_iterator(Iterator const& x, UnaryFunction f) + : super_t(x), m_f(f) { } + + explicit transform_iterator(Iterator const& x) + : super_t(x) + { + // Pro8 is a little too aggressive about instantiating the + // body of this function. +#if !BOOST_WORKAROUND(__MWERKS__, BOOST_TESTED_AT(0x3003)) + // don't provide this constructor if UnaryFunction is a + // function pointer type, since it will be 0. Too dangerous. + BOOST_STATIC_ASSERT(is_class::value); +#endif + } + + template< + class OtherUnaryFunction + , class OtherIterator + , class OtherReference + , class OtherValue> + transform_iterator( + transform_iterator const& t + , typename enable_if_convertible::type* = 0 +#if !BOOST_WORKAROUND(BOOST_MSVC, == 1310) + , typename enable_if_convertible::type* = 0 +#endif + ) + : super_t(t.base()), m_f(t.functor()) + {} + + UnaryFunction functor() const + { return m_f; } + + private: + typename super_t::reference dereference() const + { return m_f(*this->base()); } + + // Probably should be the initial base class so it can be + // optimized away via EBO if it is an empty class. + UnaryFunction m_f; + }; + + template + transform_iterator + make_transform_iterator(Iterator it, UnaryFunction fun) + { + return transform_iterator(it, fun); + } + + // Version which allows explicit specification of the UnaryFunction + // type. + // + // This generator is not provided if UnaryFunction is a function + // pointer type, because it's too dangerous: the default-constructed + // function pointer in the iterator be 0, leading to a runtime + // crash. + template +#if BOOST_WORKAROUND(BOOST_MSVC, <= 1300) + typename mpl::if_< +#else + typename iterators::enable_if< +#endif + is_class // We should probably find a cheaper test than is_class<> + , transform_iterator +#if BOOST_WORKAROUND(BOOST_MSVC, <= 1300) + , int[3] +#endif + >::type + make_transform_iterator(Iterator it) + { + return transform_iterator(it, UnaryFunction()); + } + +#if defined(BOOST_NO_TEMPLATE_PARTIAL_SPECIALIZATION ) && !defined(BOOST_NO_FUNCTION_TEMPLATE_ORDERING) + template + transform_iterator< Return (*)(Argument), Iterator, Return> + make_transform_iterator(Iterator it, Return (*fun)(Argument)) + { + return transform_iterator(it, fun); + } +#endif + +} // namespace boost + +#include + +#endif // BOOST_TRANSFORM_ITERATOR_23022003THW_HPP