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[SVN r32015]
This commit is contained in:
Thorsten Jørgen Ottosen
2005-12-13 22:50:00 +00:00
parent 51f7fe9878
commit 6478f85444
2 changed files with 46 additions and 4 deletions
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14
include/boost/range/iterator_range.hpp
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@ -143,6 +143,14 @@ namespace boost
//! This type //! This type
typedef iterator_range<IteratorT> this_type; typedef iterator_range<IteratorT> this_type;
//! Refence type
//
// Needed because value-type is the same for
// const and non-const iterators
//
typedef BOOST_DEDUCED_TYPENAME
iterator_reference<IteratorT>::type reference;
//! const_iterator type //! const_iterator type
/*! /*!
There is no distinction between const_iterator and iterator. There is no distinction between const_iterator and iterator.
@ -306,20 +314,20 @@ namespace boost
#endif #endif
public: // convenience public: // convenience
value_type& front() const reference front() const
{ {
BOOST_ASSERT( !empty() ); BOOST_ASSERT( !empty() );
return *m_Begin; return *m_Begin;
} }
value_type& back() const reference back() const
{ {
BOOST_ASSERT( !empty() ); BOOST_ASSERT( !empty() );
IteratorT last( m_End ); IteratorT last( m_End );
return *--last; return *--last;
} }
value_type& operator[]( size_type sz ) const reference operator[]( size_type sz ) const
{ {
//BOOST_STATIC_ASSERT( is_random_access ); //BOOST_STATIC_ASSERT( is_random_access );
BOOST_ASSERT( sz < size() ); BOOST_ASSERT( sz < size() );

36
test/iterator_range.cpp
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@ -1,6 +1,6 @@
// Boost.Range library // Boost.Range library
// //
// Copyright Thorsten Ottosen 2003-2004. Use, modification and // Copyright Thorsten Ottosen & Larry Evans 2003-2005. Use, modification and
// distribution is subject to the Boost Software License, Version // distribution is subject to the Boost Software License, Version
// 1.0. (See accompanying file LICENSE_1_0.txt or copy at // 1.0. (See accompanying file LICENSE_1_0.txt or copy at
// http://www.boost.org/LICENSE_1_0.txt) // http://www.boost.org/LICENSE_1_0.txt)
@ -27,6 +27,8 @@
using namespace boost; using namespace boost;
using namespace std; using namespace std;
void check_reference_type();
void check_iterator_range() void check_iterator_range()
{ {
@ -91,6 +93,8 @@ void check_iterator_range()
BOOST_CHECK( rrr == "ello worl" ); BOOST_CHECK( rrr == "ello worl" );
rrr = make_iterator_range( rrr, -1, 1 ); rrr = make_iterator_range( rrr, -1, 1 );
BOOST_CHECK( rrr == str ); BOOST_CHECK( rrr == str );
check_reference_type();
} }
@ -105,3 +109,33 @@ test_suite* init_unit_test_suite( int argc, char* argv[] )
return test; return test;
} }
//
//
// Check that constness is propgated correct from
// the iterator types.
//
// Test contributed by Larry Evans.
//
template< class Container >
void test_iter_range( Container& a_cont )
{
typedef BOOST_DEDUCED_TYPENAME range_result_iterator<Container>::type citer_type;
typedef iterator_range<citer_type> riter_type;
riter_type a_riter( make_iterator_range( a_cont ) );
a_riter.front();
a_riter.back();
int i = a_riter[0];
}
void check_reference_type()
{
typedef vector<int> veci_type;
veci_type a_vec;
a_vec.push_back( 999 );
test_iter_range<veci_type>(a_vec);
test_iter_range<veci_type const>(a_vec);
}