ext-boost/boost/iterator/new_iterator_tests.hpp
2014-12-07 23:50:51 +01:00

265 lines
7.2 KiB
C++

#ifndef BOOST_NEW_ITERATOR_TESTS_HPP
# define BOOST_NEW_ITERATOR_TESTS_HPP
//
// Copyright (c) David Abrahams 2001.
// Copyright (c) Jeremy Siek 2001-2003.
// Copyright (c) Thomas Witt 2002.
//
// Use, modification and distribution is subject to 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)
//
// This is meant to be the beginnings of a comprehensive, generic
// test suite for STL concepts such as iterators and containers.
//
// Revision History:
// 28 Oct 2002 Started update for new iterator categories
// (Jeremy Siek)
// 28 Apr 2002 Fixed input iterator requirements.
// For a == b a++ == b++ is no longer required.
// See 24.1.1/3 for details.
// (Thomas Witt)
// 08 Feb 2001 Fixed bidirectional iterator test so that
// --i is no longer a precondition.
// (Jeremy Siek)
// 04 Feb 2001 Added lvalue test, corrected preconditions
// (David Abrahams)
# include <iterator>
# include <boost/type_traits.hpp>
# include <boost/static_assert.hpp>
# include <boost/concept_archetype.hpp> // for detail::dummy_constructor
# include <boost/detail/iterator.hpp>
# include <boost/pending/iterator_tests.hpp>
# include <boost/iterator/is_readable_iterator.hpp>
# include <boost/iterator/is_lvalue_iterator.hpp>
# include <boost/iterator/detail/config_def.hpp>
# include <boost/detail/is_incrementable.hpp>
# include <boost/detail/lightweight_test.hpp>
namespace boost {
// Do separate tests for *i++ so we can treat, e.g., smart pointers,
// as readable and/or writable iterators.
template <class Iterator, class T>
void readable_iterator_traversal_test(Iterator i1, T v, mpl::true_)
{
T v2(*i1++);
BOOST_TEST(v == v2);
}
template <class Iterator, class T>
void readable_iterator_traversal_test(const Iterator i1, T v, mpl::false_)
{}
template <class Iterator, class T>
void writable_iterator_traversal_test(Iterator i1, T v, mpl::true_)
{
++i1; // we just wrote into that position
*i1++ = v;
Iterator x(i1++);
(void)x;
}
template <class Iterator, class T>
void writable_iterator_traversal_test(const Iterator i1, T v, mpl::false_)
{}
// Preconditions: *i == v
template <class Iterator, class T>
void readable_iterator_test(const Iterator i1, T v)
{
Iterator i2(i1); // Copy Constructible
typedef typename detail::iterator_traits<Iterator>::reference ref_t;
ref_t r1 = *i1;
ref_t r2 = *i2;
T v1 = r1;
T v2 = r2;
BOOST_TEST(v1 == v);
BOOST_TEST(v2 == v);
# if !BOOST_WORKAROUND(__MWERKS__, <= 0x2407)
readable_iterator_traversal_test(i1, v, detail::is_postfix_incrementable<Iterator>());
// I think we don't really need this as it checks the same things as
// the above code.
BOOST_STATIC_ASSERT(is_readable_iterator<Iterator>::value);
# endif
}
template <class Iterator, class T>
void writable_iterator_test(Iterator i, T v, T v2)
{
Iterator i2(i); // Copy Constructible
*i2 = v;
# if !BOOST_WORKAROUND(__MWERKS__, <= 0x2407)
writable_iterator_traversal_test(
i, v2, mpl::and_<
detail::is_incrementable<Iterator>
, detail::is_postfix_incrementable<Iterator>
>());
# endif
}
template <class Iterator>
void swappable_iterator_test(Iterator i, Iterator j)
{
Iterator i2(i), j2(j);
typename detail::iterator_traits<Iterator>::value_type bi = *i, bj = *j;
iter_swap(i2, j2);
typename detail::iterator_traits<Iterator>::value_type ai = *i, aj = *j;
BOOST_TEST(bi == aj && bj == ai);
}
template <class Iterator, class T>
void constant_lvalue_iterator_test(Iterator i, T v1)
{
Iterator i2(i);
typedef typename detail::iterator_traits<Iterator>::value_type value_type;
typedef typename detail::iterator_traits<Iterator>::reference reference;
BOOST_STATIC_ASSERT((is_same<const value_type&, reference>::value));
const T& v2 = *i2;
BOOST_TEST(v1 == v2);
# ifndef BOOST_NO_LVALUE_RETURN_DETECTION
BOOST_STATIC_ASSERT(is_lvalue_iterator<Iterator>::value);
BOOST_STATIC_ASSERT(!is_non_const_lvalue_iterator<Iterator>::value);
# endif
}
template <class Iterator, class T>
void non_const_lvalue_iterator_test(Iterator i, T v1, T v2)
{
Iterator i2(i);
typedef typename detail::iterator_traits<Iterator>::value_type value_type;
typedef typename detail::iterator_traits<Iterator>::reference reference;
BOOST_STATIC_ASSERT((is_same<value_type&, reference>::value));
T& v3 = *i2;
BOOST_TEST(v1 == v3);
// A non-const lvalue iterator is not neccessarily writable, but we
// are assuming the value_type is assignable here
*i = v2;
T& v4 = *i2;
BOOST_TEST(v2 == v4);
# ifndef BOOST_NO_LVALUE_RETURN_DETECTION
BOOST_STATIC_ASSERT(is_lvalue_iterator<Iterator>::value);
BOOST_STATIC_ASSERT(is_non_const_lvalue_iterator<Iterator>::value);
# endif
}
template <class Iterator, class T>
void forward_readable_iterator_test(Iterator i, Iterator j, T val1, T val2)
{
Iterator i2;
Iterator i3(i);
i2 = i;
BOOST_TEST(i2 == i3);
BOOST_TEST(i != j);
BOOST_TEST(i2 != j);
readable_iterator_test(i, val1);
readable_iterator_test(i2, val1);
readable_iterator_test(i3, val1);
BOOST_TEST(i == i2++);
BOOST_TEST(i != ++i3);
readable_iterator_test(i2, val2);
readable_iterator_test(i3, val2);
readable_iterator_test(i, val1);
}
template <class Iterator, class T>
void forward_swappable_iterator_test(Iterator i, Iterator j, T val1, T val2)
{
forward_readable_iterator_test(i, j, val1, val2);
Iterator i2 = i;
++i2;
swappable_iterator_test(i, i2);
}
// bidirectional
// Preconditions: *i == v1, *++i == v2
template <class Iterator, class T>
void bidirectional_readable_iterator_test(Iterator i, T v1, T v2)
{
Iterator j(i);
++j;
forward_readable_iterator_test(i, j, v1, v2);
++i;
Iterator i1 = i, i2 = i;
BOOST_TEST(i == i1--);
BOOST_TEST(i != --i2);
readable_iterator_test(i, v2);
readable_iterator_test(i1, v1);
readable_iterator_test(i2, v1);
--i;
BOOST_TEST(i == i1);
BOOST_TEST(i == i2);
++i1;
++i2;
readable_iterator_test(i, v1);
readable_iterator_test(i1, v2);
readable_iterator_test(i2, v2);
}
// random access
// Preconditions: [i,i+N) is a valid range
template <class Iterator, class TrueVals>
void random_access_readable_iterator_test(Iterator i, int N, TrueVals vals)
{
bidirectional_readable_iterator_test(i, vals[0], vals[1]);
const Iterator j = i;
int c;
for (c = 0; c < N-1; ++c)
{
BOOST_TEST(i == j + c);
BOOST_TEST(*i == vals[c]);
typename detail::iterator_traits<Iterator>::value_type x = j[c];
BOOST_TEST(*i == x);
BOOST_TEST(*i == *(j + c));
BOOST_TEST(*i == *(c + j));
++i;
BOOST_TEST(i > j);
BOOST_TEST(i >= j);
BOOST_TEST(j <= i);
BOOST_TEST(j < i);
}
Iterator k = j + N - 1;
for (c = 0; c < N-1; ++c)
{
BOOST_TEST(i == k - c);
BOOST_TEST(*i == vals[N - 1 - c]);
typename detail::iterator_traits<Iterator>::value_type x = j[N - 1 - c];
BOOST_TEST(*i == x);
Iterator q = k - c;
BOOST_TEST(*i == *q);
BOOST_TEST(i > j);
BOOST_TEST(i >= j);
BOOST_TEST(j <= i);
BOOST_TEST(j < i);
--i;
}
}
} // namespace boost
# include <boost/iterator/detail/config_undef.hpp>
#endif // BOOST_NEW_ITERATOR_TESTS_HPP