parlist-23-a,diff

[features.git] / src / ParagraphList.C

diff --git a/src/ParagraphList.C b/src/ParagraphList.C
index 0c70bee13d0c03bfdcd698cd59dfffa9449103ef..3e19224f9cb66385d4d822697506906e51cf3b2c 100644 (file)
--- a/src/ParagraphList.C
+++ b/src/ParagraphList.C
@@ -80,6 +80,80 @@ bool operator!=(ParagraphList::iterator const & i1,
        return !(i1 == i2);
 }
 
+////////// The ParagraphList::const_iterator
+
+ParagraphList::const_iterator::const_iterator()
+       : ptr(0)
+{}
+
+
+ParagraphList::const_iterator::const_iterator(Paragraph * p)
+       : ptr(p)
+{}
+
+
+ParagraphList::const_iterator::const_reference
+ParagraphList::const_iterator::operator*()
+{
+       return *ptr;
+}
+
+
+ParagraphList::const_iterator::const_pointer
+ParagraphList::const_iterator::operator->()
+{
+       return ptr;
+}
+
+
+ParagraphList::const_iterator &
+ParagraphList::const_iterator::operator++()
+{
+       ptr = ptr->next_par_;
+       return *this;
+}
+
+
+ParagraphList::const_iterator
+ParagraphList::const_iterator::operator++(int)
+{
+       const_iterator tmp = *this;
+       ++*this;
+       return tmp;
+}
+
+
+ParagraphList::const_iterator &
+ParagraphList::const_iterator::operator--()
+{
+       ptr = ptr->prev_par_;
+       return *this;
+}
+
+
+ParagraphList::const_iterator
+ParagraphList::const_iterator::operator--(int)
+{
+       const_iterator tmp = *this;
+       --*this;
+       return tmp;
+}
+
+
+bool operator==(ParagraphList::const_iterator const & i1,
+               ParagraphList::const_iterator const & i2)
+{
+       return &(*const_cast<ParagraphList::const_iterator&>(i1))
+           == &(*const_cast<ParagraphList::const_iterator&>(i2));
+}
+
+
+bool operator!=(ParagraphList::const_iterator const & i1,
+               ParagraphList::const_iterator const & i2)
+{
+       return !(i1 == i2);
+}
+
 //////////
 ////////// The ParagraphList proper
 //////////
@@ -93,8 +167,8 @@ ParagraphList::ParagraphList(ParagraphList const & pl)
        : parlist(0)
 {
        // Deep copy.
-       ParagraphList::iterator it = pl.begin();
-       ParagraphList::iterator end = pl.end();
+       ParagraphList::const_iterator it = pl.begin();
+       ParagraphList::const_iterator end = pl.end();
        for (; it != end; ++it) {
                push_back(*it);
        }
@@ -231,9 +305,9 @@ ParagraphList::iterator ParagraphList::begin()
 }
 
 
-ParagraphList::iterator ParagraphList::begin() const
+ParagraphList::const_iterator ParagraphList::begin() const
 {
-       return iterator(parlist);
+       return const_iterator(parlist);
 }
 
 
@@ -243,9 +317,9 @@ ParagraphList::iterator ParagraphList::end()
 }
 
 
-ParagraphList::iterator ParagraphList::end() const
+ParagraphList::const_iterator ParagraphList::end() const
 {
-       return iterator();
+       return const_iterator();
 }