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Fixes for concept checking; use destructors for checking classes, misc cleanup.

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[SVN r33862]
This commit is contained in:
Dave Abrahams
2006-04-29 20:27:14 +00:00
parent 28dd458088
commit f5b644e765
2 changed files with 171 additions and 182 deletions
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334
include/boost/iterator/iterator_concepts.hpp
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@ -35,79 +35,74 @@
#include <algorithm>
namespace boost_concepts {
namespace boost_concepts
{
// Used a different namespace here (instead of "boost") so that the
// concept descriptions do not take for granted the names in
// namespace boost.
// We use this in place of STATIC_ASSERT((is_convertible<...>))
// because some compilers (CWPro7.x) can't detect convertibility.
//
// Of course, that just gets us a different error at the moment with
// some tests, since new iterator category deduction still depends
// on convertibility detection. We might need some specializations
// to support this compiler.
template <class Target, class Source>
struct static_assert_base_and_derived
{
static_assert_base_and_derived(Target* = (Source*)0) {}
};
//===========================================================================
// Iterator Access Concepts
template <typename Iterator>
class ReadableIteratorConcept {
public:
typedef BOOST_DEDUCED_TYPENAME boost::detail::iterator_traits<Iterator>::value_type value_type;
struct ReadableIteratorConcept
: boost::AssignableConcept<Iterator>
, boost::CopyConstructibleConcept<Iterator>
void constraints() {
boost::function_requires< boost::AssignableConcept<Iterator> >();
boost::function_requires< boost::CopyConstructibleConcept<Iterator> >();
{
typedef BOOST_DEDUCED_TYPENAME boost::detail::iterator_traits<Iterator>::value_type value_type;
typedef BOOST_DEDUCED_TYPENAME boost::detail::iterator_traits<Iterator>::reference reference;
value_type v = *i;
boost::ignore_unused_variable_warning(v);
}
Iterator i;
~ReadableIteratorConcept()
{
value_type v = *i;
boost::ignore_unused_variable_warning(v);
}
private:
Iterator i;
};
template <
typename Iterator
, typename ValueType = BOOST_DEDUCED_TYPENAME boost::detail::iterator_traits<Iterator>::value_type
>
class WritableIteratorConcept {
public:
void constraints() {
boost::function_requires< boost::CopyConstructibleConcept<Iterator> >();
*i = v;
}
ValueType v;
Iterator i;
struct WritableIteratorConcept
: boost::CopyConstructibleConcept<Iterator>
{
~WritableIteratorConcept()
{
*i = v;
}
private:
ValueType v;
Iterator i;
};
template <typename Iterator>
class SwappableIteratorConcept {
public:
void constraints() {
std::iter_swap(i1, i2);
}
Iterator i1;
Iterator i2;
struct SwappableIteratorConcept
{
~SwappableIteratorConcept()
{
std::iter_swap(i1, i2);
}
private:
Iterator i1;
Iterator i2;
};
template <typename Iterator>
class LvalueIteratorConcept
struct LvalueIteratorConcept
{
public:
typedef typename boost::detail::iterator_traits<Iterator>::value_type value_type;
void constraints()
~LvalueIteratorConcept()
{
value_type& r = const_cast<value_type&>(*i);
boost::ignore_unused_variable_warning(r);
}
Iterator i;
private:
Iterator i;
};
@ -115,119 +110,106 @@ namespace boost_concepts {
// Iterator Traversal Concepts
template <typename Iterator>
class IncrementableIteratorConcept {
public:
typedef typename boost::iterator_traversal<Iterator>::type traversal_category;
struct IncrementableIteratorConcept
: boost::AssignableConcept<Iterator>
, boost::CopyConstructibleConcept<Iterator>
{
typedef typename boost::iterator_traversal<Iterator>::type traversal_category;
void constraints() {
boost::function_requires< boost::AssignableConcept<Iterator> >();
boost::function_requires< boost::CopyConstructibleConcept<Iterator> >();
~IncrementableIteratorConcept()
{
BOOST_MPL_ASSERT((
boost::is_convertible<
traversal_category
, boost::incrementable_traversal_tag
> ));
BOOST_STATIC_ASSERT(
(boost::is_convertible<
traversal_category
, boost::incrementable_traversal_tag
>::value
));
++i;
(void)i++;
}
Iterator i;
++i;
(void)i++;
}
private:
Iterator i;
};
template <typename Iterator>
class SinglePassIteratorConcept {
public:
typedef typename boost::iterator_traversal<Iterator>::type traversal_category;
typedef typename boost::detail::iterator_traits<Iterator>::difference_type difference_type;
struct SinglePassIteratorConcept
: IncrementableIteratorConcept<Iterator>
, boost::EqualityComparableConcept<Iterator>
void constraints() {
boost::function_requires< IncrementableIteratorConcept<Iterator> >();
boost::function_requires< boost::EqualityComparableConcept<Iterator> >();
BOOST_STATIC_ASSERT(
(boost::is_convertible<
traversal_category
, boost::single_pass_traversal_tag
>::value
));
}
{
~SinglePassIteratorConcept()
{
BOOST_MPL_ASSERT((
boost::is_convertible<
BOOST_DEDUCED_TYPENAME SinglePassIteratorConcept::traversal_category
, boost::single_pass_traversal_tag
> ));
}
};
template <typename Iterator>
class ForwardTraversalConcept {
public:
typedef typename boost::iterator_traversal<Iterator>::type traversal_category;
typedef typename boost::detail::iterator_traits<Iterator>::difference_type difference_type;
void constraints() {
boost::function_requires< SinglePassIteratorConcept<Iterator> >();
boost::function_requires<
boost::DefaultConstructibleConcept<Iterator> >();
typedef boost::mpl::and_<
boost::is_integral<difference_type>,
boost::mpl::bool_< std::numeric_limits<difference_type>::is_signed >
> difference_type_is_signed_integral;
BOOST_STATIC_ASSERT(difference_type_is_signed_integral::value);
BOOST_STATIC_ASSERT(
(boost::is_convertible<
traversal_category
, boost::forward_traversal_tag
>::value
));
struct ForwardTraversalConcept
: SinglePassIteratorConcept<Iterator>
, boost::DefaultConstructibleConcept<Iterator>
{
typedef typename boost::detail::iterator_traits<Iterator>::difference_type difference_type;
~ForwardTraversalConcept()
{
BOOST_MPL_ASSERT((boost::is_integral<difference_type>));
BOOST_MPL_ASSERT_RELATION(std::numeric_limits<difference_type>::is_signed, ==, true);
BOOST_MPL_ASSERT((
boost::is_convertible<
BOOST_DEDUCED_TYPENAME ForwardTraversalConcept::traversal_category
, boost::forward_traversal_tag
> ));
}
};
template <typename Iterator>
class BidirectionalTraversalConcept {
public:
typedef typename boost::iterator_traversal<Iterator>::type traversal_category;
void constraints() {
boost::function_requires< ForwardTraversalConcept<Iterator> >();
BOOST_STATIC_ASSERT(
(boost::is_convertible<
traversal_category
, boost::bidirectional_traversal_tag
>::value
));
--i;
(void)i--;
}
Iterator i;
struct BidirectionalTraversalConcept
: ForwardTraversalConcept<Iterator>
{
~BidirectionalTraversalConcept()
{
BOOST_MPL_ASSERT((
boost::is_convertible<
BOOST_DEDUCED_TYPENAME BidirectionalTraversalConcept::traversal_category
, boost::bidirectional_traversal_tag
> ));
--i;
(void)i--;
}
private:
Iterator i;
};
template <typename Iterator>
class RandomAccessTraversalConcept {
public:
typedef typename boost::iterator_traversal<Iterator>::type traversal_category;
typedef typename boost::detail::iterator_traits<Iterator>::difference_type
difference_type;
void constraints() {
boost::function_requires< BidirectionalTraversalConcept<Iterator> >();
BOOST_STATIC_ASSERT(
(boost::is_convertible<
traversal_category
, boost::random_access_traversal_tag
>::value
));
struct RandomAccessTraversalConcept
: BidirectionalTraversalConcept<Iterator>
{
public:
~RandomAccessTraversalConcept()
{
BOOST_MPL_ASSERT((
boost::is_convertible<
BOOST_DEDUCED_TYPENAME RandomAccessTraversalConcept::traversal_category
, boost::random_access_traversal_tag
> ));
i += n;
i = i + n;
i = n + i;
i -= n;
i = i - n;
n = i - j;
}
i += n;
i = i + n;
i = n + i;
i -= n;
i = i - n;
n = i - j;
}
difference_type n;
Iterator i, j;
private:
typename BidirectionalTraversalConcept<Iterator>::difference_type n;
Iterator i, j;
};
//===========================================================================
@ -235,47 +217,52 @@ namespace boost_concepts {
namespace detail
{
template <typename Iterator1, typename Iterator2>
void interop_single_pass_constraints(Iterator1 const& i1, Iterator2 const& i2)
{
bool b;
b = i1 == i2;
b = i1 != i2;
b = i2 == i1;
b = i2 != i1;
bool b;
b = i1 == i2;
b = i1 != i2;
b = i2 == i1;
b = i2 != i1;
boost::ignore_unused_variable_warning(b);
}
template <typename Iterator1, typename Iterator2>
void interop_rand_access_constraints(Iterator1 const& i1, Iterator2 const& i2,
boost::random_access_traversal_tag, boost::random_access_traversal_tag)
void interop_rand_access_constraints(
Iterator1 const& i1, Iterator2 const& i2,
boost::random_access_traversal_tag, boost::random_access_traversal_tag)
{
bool b;
typename boost::detail::iterator_traits<Iterator2>::difference_type n;
b = i1 < i2;
b = i1 <= i2;
b = i1 > i2;
b = i1 >= i2;
n = i1 - i2;
b = i2 < i1;
b = i2 <= i1;
b = i2 > i1;
b = i2 >= i1;
n = i2 - i1;
bool b;
typename boost::detail::iterator_traits<Iterator2>::difference_type n;
b = i1 < i2;
b = i1 <= i2;
b = i1 > i2;
b = i1 >= i2;
n = i1 - i2;
b = i2 < i1;
b = i2 <= i1;
b = i2 > i1;
b = i2 >= i1;
n = i2 - i1;
boost::ignore_unused_variable_warning(b);
boost::ignore_unused_variable_warning(n);
}
template <typename Iterator1, typename Iterator2>
void interop_rand_access_constraints(Iterator1 const& i1, Iterator2 const& i2,
boost::single_pass_traversal_tag, boost::single_pass_traversal_tag)
void interop_rand_access_constraints(
Iterator1 const&, Iterator2 const&,
boost::single_pass_traversal_tag, boost::single_pass_traversal_tag)
{ }
} // namespace detail
template <typename Iterator, typename ConstIterator>
class InteroperableIteratorConcept
struct InteroperableIteratorConcept
{
public:
private:
typedef typename boost::detail::pure_traversal_tag<
typename boost::iterator_traversal<
Iterator
@ -287,17 +274,20 @@ namespace boost_concepts {
ConstIterator
>::type
>::type const_traversal_category;
void constraints()
public:
~InteroperableIteratorConcept()
{
boost::function_requires< SinglePassIteratorConcept<Iterator> >();
boost::function_requires< SinglePassIteratorConcept<ConstIterator> >();
BOOST_CONCEPT_ASSERT((SinglePassIteratorConcept<Iterator>));
BOOST_CONCEPT_ASSERT((SinglePassIteratorConcept<ConstIterator>));
detail::interop_single_pass_constraints(i, ci);
detail::interop_rand_access_constraints(i, ci, traversal_category(), const_traversal_category());
ci = i;
}
private:
Iterator i;
ConstIterator ci;
};