Allow match_results::position() to return a valid value for partial matches.

[SVN r34324]

doc/Attic/history.html

@@ -27,8 +27,11 @@
       <P>Boost 1.34</P>
       <UL>
          <LI>
-      	Fix for non-greedy repeats and partial matches not working correctly in some cases.
+         Fix for non-greedy repeats and partial matches not working correctly in some 
-      	</LI>
+         cases.
+         <LI>
+            Changed match_results::position() to return a valid result when *this 
+            represents a partial match.</LI>
       </UL>
       <P>Boost 1.33.1</P>
       <UL>
@@ -169,4 +172,3 @@
             or copy at <A href="http://www.boost.org/LICENSE_1_0.txt">http://www.boost.org/LICENSE_1_0.txt</A>)</I></P>
    </body>
 </html>
-

doc/Attic/match_results.html

@@ -300,7 +300,9 @@ difference_type position(unsigned int sub = 0)const;
 </pre>
       <b></b>
       <p><b>Effects:</b> Returns the starting location of sub-expression <EM>sub</EM>, 
-         or -1 if <EM>sub</EM> was not matched <code>.</code></p>
+         or -1 if <EM>sub</EM> was not matched.&nbsp; Note that if this represents a <A href="partial_matches.html">
+            partial match</A> , then <code>position()</code> will return the location of 
+         the partial match even though <code>(*this)[0].matched</code> is <EM>false</EM>.</p>
       <pre><A name=m6></A>
 string_type str(int sub = 0)const;
 </pre>

doc/history.html

@@ -27,8 +27,11 @@
       <P>Boost 1.34</P>
       <UL>
          <LI>
-      	Fix for non-greedy repeats and partial matches not working correctly in some cases.
+         Fix for non-greedy repeats and partial matches not working correctly in some 
-      	</LI>
+         cases.
+         <LI>
+            Changed match_results::position() to return a valid result when *this 
+            represents a partial match.</LI>
       </UL>
       <P>Boost 1.33.1</P>
       <UL>
@@ -169,4 +172,3 @@
             or copy at <A href="http://www.boost.org/LICENSE_1_0.txt">http://www.boost.org/LICENSE_1_0.txt</A>)</I></P>
    </body>
 </html>
-

doc/match_results.html

@@ -300,7 +300,9 @@ difference_type position(unsigned int sub = 0)const;
 </pre>
       <b></b>
       <p><b>Effects:</b> Returns the starting location of sub-expression <EM>sub</EM>, 
-         or -1 if <EM>sub</EM> was not matched <code>.</code></p>
+         or -1 if <EM>sub</EM> was not matched.&nbsp; Note that if this represents a <A href="partial_matches.html">
+            partial match</A> , then <code>position()</code> will return the location of 
+         the partial match even though <code>(*this)[0].matched</code> is <EM>false</EM>.</p>
       <pre><A name=m6></A>
 string_type str(int sub = 0)const;
 </pre>

include/boost/regex/v4/match_results.hpp

@@ -94,7 +94,7 @@ public:
       if(sub < m_subs.size())
       {
          const sub_match<BidiIterator>& s = m_subs[sub];
-         if(s.matched)
+         if(s.matched || (sub == 2))
          {
             return ::boost::re_detail::distance((BidiIterator)(m_base), (BidiIterator)(s.first));
          }