mirror of
https://github.com/boostorg/iterator.git
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f18906ac6b
changes elsewhere. boost/iterator and libs/iterator/test were updated from branch "simplify" [SVN r20905]
112 lines
3.0 KiB
C++
112 lines
3.0 KiB
C++
// Copyright David Abrahams 2003. Permission to copy, use,
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// modify, sell and distribute this software is granted provided this
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// copyright notice appears in all copies. This software is provided
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// "as is" without express or implied warranty, and with no claim as
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// to its suitability for any purpose.
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#include <boost/iterator/iterator_adaptor.hpp>
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#include <boost/static_assert.hpp>
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#include "static_assert_same.hpp"
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#include <boost/type_traits/broken_compiler_spec.hpp>
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#include <boost/iterator/detail/minimum_category.hpp>
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struct X { int a; };
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BOOST_TT_BROKEN_COMPILER_SPEC(X)
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struct Xiter : boost::iterator_adaptor<Xiter,X*>
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{
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Xiter();
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Xiter(X* p) : boost::iterator_adaptor<Xiter, X*>(p) {}
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};
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void take_xptr(X*) {}
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void operator_arrow_test()
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{
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// check that the operator-> result is a pointer for lvalue iterators
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X x;
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take_xptr(Xiter(&x).operator->());
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}
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template <class T, class U, class Min>
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struct static_assert_min_cat
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: static_assert_same<
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typename boost::detail::minimum_category<T,U>::type, Min
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>
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{};
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void category_test()
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{
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using namespace boost;
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using namespace boost::detail;
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BOOST_STATIC_ASSERT((
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!boost::is_convertible<
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std::input_iterator_tag
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, input_output_iterator_tag>::value));
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BOOST_STATIC_ASSERT((
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!boost::is_convertible<
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std::output_iterator_tag
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, input_output_iterator_tag>::value));
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BOOST_STATIC_ASSERT((
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boost::is_convertible<
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input_output_iterator_tag
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, std::input_iterator_tag>::value));
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BOOST_STATIC_ASSERT((
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boost::is_convertible<
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input_output_iterator_tag
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, std::output_iterator_tag>::value));
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#if 0 // This seems wrong; we're not advertising
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// input_output_iterator_tag are we?
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BOOST_STATIC_ASSERT((
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boost::is_convertible<
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std::forward_iterator_tag
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, input_output_iterator_tag>::value));
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#endif
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int test = static_assert_min_cat<
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std::input_iterator_tag,input_output_iterator_tag, std::input_iterator_tag
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>::value;
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test = static_assert_min_cat<
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input_output_iterator_tag,std::input_iterator_tag, std::input_iterator_tag
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>::value;
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#if 0
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test = static_assert_min_cat<
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input_output_iterator_tag,std::forward_iterator_tag, input_output_iterator_tag
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>::value;
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#endif
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test = static_assert_min_cat<
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std::input_iterator_tag,std::forward_iterator_tag, std::input_iterator_tag
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>::value;
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test = static_assert_min_cat<
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std::input_iterator_tag,std::random_access_iterator_tag, std::input_iterator_tag
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>::value;
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#if 0 // This would be wrong: a random access iterator is not
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// neccessarily writable, as is an output iterator.
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test = static_assert_min_cat<
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std::output_iterator_tag,std::random_access_iterator_tag, std::output_iterator_tag
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>::value;
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#endif
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(void)test;
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}
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int main()
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{
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category_test();
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operator_arrow_test();
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return 0;
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}
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