Branch at revision 46530

[SVN r46531]
Fixed syntax of optional_swap_should_use_default_constructor and swap template specializations that I added 2 days ago (changeset [45265]). Was accepted by MSVC, but rejected by other compilers.
2025-06-28 05:21:01 +02:00 · 2008-06-19 18:57:10 +00:00 · 2008-05-12 13:29:52 +00:00 · 2008-05-10 14:53:51 +00:00 · 2008-05-10 14:42:49 +00:00 · 2008-04-27 21:09:50 +00:00
51 changed files with 696 additions and 2046 deletions
--- a/doc/Jamfile.v2
+++ b/doc/Jamfile.v2
@ -21,8 +21,10 @@ boostbook standalone
    :
        optional
    :
-        <xsl:param>toc.max.depth=1
+        <xsl:param>boost.root=../../../..
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@ -12,17 +12,17 @@
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+<td align="right"><div class="copyright-footer">Copyright <20> 2003 -2007 Fernando Luis Cacciola Carballal<p>
        Distributed under the Boost Software License, Version 1.0. (See accompanying
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@ -10,24 +10,24 @@
    and Portability">
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@ -112,11 +112,15 @@
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-<td align="right"><small>Copyright <20> 2003 -2007 Fernando Luis Cacciola Carballal</small></td>
+<td align="right"><div class="copyright-footer">Copyright <20> 2003 -2007 Fernando Luis Cacciola Carballal<p>
        Distributed under the Boost Software License, Version 1.0. (See accompanying
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 <td align="left"></td>
-<td align="right"><small>Copyright <20> 2003 -2007 Fernando Luis Cacciola Carballal</small></td>
+<td align="right"><div class="copyright-footer">Copyright <20> 2003 -2007 Fernando Luis Cacciola Carballal<p>
        Distributed under the Boost Software License, Version 1.0. (See accompanying
        file LICENSE_1_0.txt or copy at <a href="http://www.boost.org/LICENSE_1_0.txt" target="_top">http://www.boost.org/LICENSE_1_0.txt</a>)
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@ -29,36 +29,42 @@
 <p>
      Because <code class="computeroutput"><span class="identifier">T</span></code> might be of reference
      type, in the sequel, those entries whose semantic depends on <code class="computeroutput"><span class="identifier">T</span></code> being of reference type or not will be
-      distinguished using the following convention: * If the entry reads: <code class="computeroutput"><span class="identifier">optional</span><span class="special">&lt;</span><span class="identifier">T</span></code><span class="emphasis"><em>(not a ref)</em></span><code class="computeroutput"><span class="special">&gt;</span></code>, the description corresponds only to the
+      distinguished using the following convention:
      case where <code class="computeroutput"><span class="identifier">T</span></code> is not of reference
      type. * If the entry reads: <code class="computeroutput"><span class="identifier">optional</span><span class="special">&lt;</span><span class="identifier">T</span><span class="special">&amp;&gt;</span></code>,
      the description corresponds only to the case where <code class="computeroutput"><span class="identifier">T</span></code>
      is of reference type. * If the entry reads: <code class="computeroutput"><span class="identifier">optional</span><span class="special">&lt;</span><span class="identifier">T</span><span class="special">&gt;</span></code>,
      the description is the same for both cases.
    </p>
 <div class="itemizedlist"><ul type="disc">
 <li>
        If the entry reads: <code class="computeroutput"><span class="identifier">optional</span><span class="special">&lt;</span><span class="identifier">T</span></code><span class="emphasis"><em>(not
        a ref)</em></span><code class="computeroutput"><span class="special">&gt;</span></code>, the description
        corresponds only to the case where <code class="computeroutput"><span class="identifier">T</span></code>
        is not of reference type.
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 <li>
        If the entry reads: <code class="computeroutput"><span class="identifier">optional</span><span class="special">&lt;</span><span class="identifier">T</span><span class="special">&amp;&gt;</span></code>,
        the description corresponds only to the case where <code class="computeroutput"><span class="identifier">T</span></code>
        is of reference type.
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 <li>
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 <div class="note"><table border="0" summary="Note">
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+<td rowspan="2" align="center" valign="top" width="25"><img alt="[Note]" src="../../../../../doc/html/images/note.png"></td>
 <th align="left">Note</th>
 </tr>
-<tr><td align="left" valign="top">
+<tr><td align="left" valign="top"><p>
 <p>
        </p>
 <p>
        The following section contains various <code class="computeroutput"><span class="identifier">assert</span><span class="special">()</span></code> which are used only to show the postconditions
        as sample code. It is not implied that the type <code class="computeroutput"><span class="identifier">T</span></code>
        must support each particular expression but that if the expression is supported,
        the implied condition holds.
-        </p>
+      </p></td></tr>
 <p>
      </p>
 </td></tr>
 </table></div>
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+<a name="id2620257"></a>
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@ -1334,7 +1340,7 @@
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    </p>
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@ -1693,11 +1699,15 @@
 </div>
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 <td align="left"></td>
-<td align="right"><small>Copyright <20> 2003 -2007 Fernando Luis Cacciola Carballal</small></td>
+<td align="right"><div class="copyright-footer">Copyright <20> 2003 -2007 Fernando Luis Cacciola Carballal<p>
        Distributed under the Boost Software License, Version 1.0. (See accompanying
        file LICENSE_1_0.txt or copy at <a href="http://www.boost.org/LICENSE_1_0.txt" target="_top">http://www.boost.org/LICENSE_1_0.txt</a>)
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        itself which are supported by a special interface.
      </p>
 <a name="boost_optional.development.the_interface.lexically_hinted_value_access_in_the_presence_of_possibly_untitialized_optional_objects__the_operators___and___gt_"></a><h5>
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        <a href="development.html#boost_optional.development.the_interface.lexically_hinted_value_access_in_the_presence_of_possibly_untitialized_optional_objects__the_operators___and___gt_">Lexically-hinted
        Value Access in the presence of possibly untitialized optional objects: The
        operators * and -&gt;</a>
@ -357,7 +357,7 @@
        incarnated by pointers.
      </p>
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+<a name="id2615714"></a>
        <a href="development.html#boost_optional.development.the_interface.optional_lt_t_gt__as_a_model_of_optionalpointee">Optional&lt;T&gt;
        as a model of OptionalPointee</a>
      </h5>
@ -369,19 +369,12 @@
      </p>
 <div class="warning"><table border="0" summary="Warning">
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-<td rowspan="2" align="center" valign="top" width="25"><img alt="[Warning]" src="../images/warning.png"></td>
+<td rowspan="2" align="center" valign="top" width="25"><img alt="[Warning]" src="../../../../../doc/html/images/warning.png"></td>
 <th align="left">Warning</th>
 </tr>
-<tr><td align="left" valign="top">
+<tr><td align="left" valign="top"><p>
-<p>
+          However, it is particularly important to note that <code class="computeroutput"><span class="identifier">optional</span><span class="special">&lt;&gt;</span></code> objects are not pointers. <span class="underline"><code class="computeroutput"><span class="identifier">optional</span><span class="special">&lt;&gt;</span></code> is not, and does not model, a pointer</span>.
-          </p>
+        </p></td></tr>
 <p>
            However, it is particularly important to note that <code class="computeroutput"><span class="identifier">optional</span><span class="special">&lt;&gt;</span></code> objects are not pointers. <span class="underline"><code class="computeroutput"><span class="identifier">optional</span><span class="special">&lt;&gt;</span></code> is not, and does not model, a
            pointer</span>.
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        For instance, <code class="computeroutput"><span class="identifier">optional</span><span class="special">&lt;&gt;</span></code>
@ -405,11 +398,15 @@
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-<td align="right"><small>Copyright <20> 2003 -2007 Fernando Luis Cacciola Carballal</small></td>
+<td align="right"><div class="copyright-footer">Copyright <20> 2003 -2007 Fernando Luis Cacciola Carballal<p>
        Distributed under the Boost Software License, Version 1.0. (See accompanying
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-<td align="right"><small>Copyright <20> 2003 -2007 Fernando Luis Cacciola Carballal</small></td>
+<td align="right"><div class="copyright-footer">Copyright <20> 2003 -2007 Fernando Luis Cacciola Carballal<p>
        Distributed under the Boost Software License, Version 1.0. (See accompanying
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 <span class="special">}</span>
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-<a name="id2644335"></a>
+<a name="id2644478"></a>
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+<td align="right"><div class="copyright-footer">Copyright <20> 2003 -2007 Fernando Luis Cacciola Carballal<p>
        Distributed under the Boost Software License, Version 1.0. (See accompanying
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--- a/doc/html/boost_optional/in_place_factories.html
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    optional&lt;bool&gt;">
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@ -75,7 +75,7 @@
 <span class="identifier">assert</span><span class="special">(</span><span class="identifier">b</span><span class="special">==</span><span class="number">3</span><span class="special">);</span> 
 </pre>
 <a name="boost_optional.rebinding_semantics_for_assignment_of_optional_references.rationale"></a><h4>
-<a name="id2639932"></a>
+<a name="id2640074"></a>
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    </h4>
 <p>
@ -141,11 +141,15 @@
 </div>
 <table xmlns:rev="http://www.cs.rpi.edu/~gregod/boost/tools/doc/revision" width="100%"><tr>
 <td align="left"></td>
-<td align="right"><small>Copyright <20> 2003 -2007 Fernando Luis Cacciola Carballal</small></td>
+<td align="right"><div class="copyright-footer">Copyright <20> 2003 -2007 Fernando Luis Cacciola Carballal<p>
        Distributed under the Boost Software License, Version 1.0. (See accompanying
        file LICENSE_1_0.txt or copy at <a href="http://www.boost.org/LICENSE_1_0.txt" target="_top">http://www.boost.org/LICENSE_1_0.txt</a>)
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-<td align="right"><small>Copyright <20> 2003 -2007 Fernando Luis Cacciola Carballal</small></td>
+<td align="right"><div class="copyright-footer">Copyright <20> 2003 -2007 Fernando Luis Cacciola Carballal<p>
        Distributed under the Boost Software License, Version 1.0. (See accompanying
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-<td align="right"><small>Copyright <20> 2003 -2007 Fernando Luis Cacciola Carballal</small></td>
+<td align="right"><div class="copyright-footer">Copyright <20> 2003 -2007 Fernando Luis Cacciola Carballal<p>
        Distributed under the Boost Software License, Version 1.0. (See accompanying
        file LICENSE_1_0.txt or copy at <a href="http://www.boost.org/LICENSE_1_0.txt" target="_top">http://www.boost.org/LICENSE_1_0.txt</a>)
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+++ b/doc/html/images/warning.png
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+++ b/doc/html/index.html
@ -8,16 +8,16 @@
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 <div class="chapter" lang="en">
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@ -27,7 +27,7 @@
 </h3></div></div>
 <div><p class="copyright">Copyright <20> 2003 -2007 Fernando Luis Cacciola Carballal</p></div>
 <div><div class="legalnotice">
-<a name="id2604804"></a><p>
+<a name="id2604939"></a><p>
        Distributed under the Boost Software License, Version 1.0. (See accompanying
        file LICENSE_1_0.txt or copy at <a href="http://www.boost.org/LICENSE_1_0.txt" target="_top">http://www.boost.org/LICENSE_1_0.txt</a>)
      </p>
@ -38,9 +38,24 @@
 <dl>
 <dt><span class="section"><a href="index.html#optional.motivation">Motivation</a></span></dt>
 <dt><span class="section"><a href="boost_optional/development.html">Development</a></span></dt>
 <dd><dl>
 <dt><span class="section"><a href="boost_optional/development.html#boost_optional.development.the_models">The models</a></span></dt>
 <dt><span class="section"><a href="boost_optional/development.html#boost_optional.development.the_semantics">The semantics</a></span></dt>
 <dt><span class="section"><a href="boost_optional/development.html#boost_optional.development.the_interface">The Interface</a></span></dt>
 </dl></dd>
 <dt><span class="section"><a href="boost_optional/synopsis.html">Synopsis</a></span></dt>
 <dt><span class="section"><a href="boost_optional/detailed_semantics.html">Detailed Semantics</a></span></dt>
 <dt><span class="section"><a href="boost_optional/examples.html">Examples</a></span></dt>
 <dd><dl>
 <dt><span class="section"><a href="boost_optional/examples.html#boost_optional.examples.optional_return_values">Optional
      return values</a></span></dt>
 <dt><span class="section"><a href="boost_optional/examples.html#boost_optional.examples.optional_local_variables">Optional
      local variables</a></span></dt>
 <dt><span class="section"><a href="boost_optional/examples.html#boost_optional.examples.optional_data_members">Optional
      data members</a></span></dt>
 <dt><span class="section"><a href="boost_optional/examples.html#boost_optional.examples.bypassing_expensive_unnecessary_default_construction">Bypassing
      expensive unnecessary default construction</a></span></dt>
 </dl></dd>
 <dt><span class="section"><a href="boost_optional/optional_references.html">Optional references</a></span></dt>
 <dt><span class="section"><a href="boost_optional/rebinding_semantics_for_assignment_of_optional_references.html">Rebinding
    semantics for assignment of optional references</a></span></dt>
@ -159,10 +174,10 @@
  </p>
 </div>
 <table xmlns:rev="http://www.cs.rpi.edu/~gregod/boost/tools/doc/revision" width="100%"><tr>
-<td align="left"><small><p>Last revised: May 29, 2007 at 06:31:03 GMT</p></small></td>
+<td align="left"><p><small>Last revised: February 12, 2008 at 22:47:14 GMT</small></p></td>
-<td align="right"><small></small></td>
+<td align="right"><div class="copyright-footer"></div></td>
 </tr></table>
 <hr>
-<div class="spirit-nav"><a accesskey="n" href="boost_optional/development.html"><img src="images/next.png" alt="Next"></a></div>
+<div class="spirit-nav"><a accesskey="n" href="boost_optional/development.html"><img src="../../../../doc/html/images/next.png" alt="Next"></a></div>
 </body>
 </html>
--- a/doc/optional.html
+++ b/doc/optional.html
--- a/doc/optional.qbk
+++ b/doc/optional.qbk
@ -22,7 +22,7 @@ Distributed under the Boost Software License, Version 1.0.
 [/ Cited Boost resources ]
 [def __BOOST_VARIANT__ [@../../../variant/index.html Boost.Variant]]
-[def __BOOST_TRIBOOL__ [@../../../tribool/index.html boost::tribool]]
+[def __BOOST_TRIBOOL__ [@../../../../doc/html/tribool.html boost::tribool]]
 [def __OPTIONAL_POINTEE__ [@../../../utility/OptionalPointee.html OptionalPointee]]
 [def __COPY_CONSTRUCTIBLE__ [@../../../utility/CopyConstructible.html Copy Constructible]]
@ -40,11 +40,6 @@ Distributed under the Boost Software License, Version 1.0.
 [/ Icons ]
 [def __NOTE__ [$images/note.png]]
 [def __ALERT__ [$images/caution.png]]
 [def __DETAIL__ [$images/note.png]]
 [def __TIP__ [$images/tip.png]]
 [def __QUESTION_MARK__ [$images/question.png]]
 [def __SPACE__ [$images/space.png]]
 [def __GO_TO__ [$images/callouts/R.png]]
--- a/doc/reference.qbk
+++ b/doc/reference.qbk
@ -126,6 +126,7 @@
 Because `T` might be of reference type, in the sequel, those entries whose
 semantic depends on `T` being of reference type or not will be distinguished
 using the following convention:
 * If the entry reads: `optional<T`['(not a ref)]`>`, the description
 corresponds only to the case where `T` is not of reference type.
 * If the entry reads: `optional<T&>`, the description corresponds only to
--- a/include/boost/none.hpp
+++ b/include/boost/none.hpp
@ -4,7 +4,7 @@
 // (See accompanying file LICENSE_1_0.txt or copy at
 // http://www.boost.org/LICENSE_1_0.txt)
 //
-// See http://www.boost.org/lib/optional/ for documentation.
+// See http://www.boost.org/libs/optional for documentation.
 //
 // You are welcome to contact the author at:
 //  fernando_cacciola@hotmail.com
--- a/include/boost/none_t.hpp
+++ b/include/boost/none_t.hpp
@ -4,7 +4,7 @@
 // License, Version 1.0. (See accompanying file LICENSE_1_0.txt or copy at
 // http://www.boost.org/LICENSE_1_0.txt)
 //
-// See http://www.boost.org/lib/optional for documentation.
+// See http://www.boost.org/libs/optional for documentation.
 //
 // You are welcome to contact the author at:
 //  fernando_cacciola@hotmail.com
--- a/include/boost/optional.hpp
+++ b/include/boost/optional.hpp
@ -4,7 +4,7 @@
 // License, Version 1.0. (See accompanying file LICENSE_1_0.txt or copy at
 // http://www.boost.org/LICENSE_1_0.txt)
 //
-// See http://www.boost.org/lib/optional for documentation.
+// See http://www.boost.org/libs/optional for documentation.
 //
 // You are welcome to contact the author at:
 //  fernando_cacciola@hotmail.com
--- a/include/boost/optional/optional.hpp
+++ b/include/boost/optional/optional.hpp
@ -1,4 +1,4 @@
-// Copyright (C) 2003, Fernando Luis Cacciola Carballal.
+// Copyright (C) 2003, 2008 Fernando Luis Cacciola Carballal.
 //
 // Use, modification, and distribution is subject to the Boost Software
 // License, Version 1.0. (See accompanying file LICENSE_1_0.txt or copy at
@ -9,6 +9,9 @@
 // You are welcome to contact the author at:
 //  fernando_cacciola@hotmail.com
 //
 // Revisions:
 // 27 Apr 2008 (improved swap) Fernando Cacciola, Niels Dekker, Thorsten Ottosen
 // 
 #ifndef BOOST_OPTIONAL_OPTIONAL_FLC_19NOV2002_HPP
 #define BOOST_OPTIONAL_OPTIONAL_FLC_19NOV2002_HPP
@ -19,6 +22,7 @@
 #include "boost/assert.hpp"
 #include "boost/type.hpp"
 #include "boost/type_traits/alignment_of.hpp"
 #include "boost/type_traits/has_nothrow_constructor.hpp"
 #include "boost/type_traits/type_with_alignment.hpp"
 #include "boost/type_traits/remove_reference.hpp"
 #include "boost/type_traits/is_reference.hpp"
@ -28,6 +32,7 @@
 #include "boost/detail/reference_content.hpp"
 #include "boost/none.hpp"
 #include "boost/utility/compare_pointees.hpp"
 #include "boost/utility/in_place_factory.hpp"
 #include "boost/optional/optional_fwd.hpp"
@ -516,7 +521,7 @@ class optional : public optional_detail::optional_base<T>
    // Creates a deep copy of another optional<T>
    // Can throw if T::T(T const&) does
-    optional ( optional const& rhs ) : base(rhs) {}
+    optional ( optional const& rhs ) : base( static_cast<base const&>(rhs) ) {}
   // No-throw (assuming T::~T() doesn't)
    ~optional() {}
@ -550,7 +555,7 @@ class optional : public optional_detail::optional_base<T>
    //  (NOTE: On BCB, this operator is not actually called and left is left UNMODIFIED in case of a throw)
    optional& operator= ( optional const& rhs )
      {
-        this->assign( rhs ) ;
+        this->assign( static_cast<base const&>(rhs) ) ;
        return *this ;
      }
@ -571,6 +576,14 @@ class optional : public optional_detail::optional_base<T>
        return *this ;
      }
    void swap( optional & arg )
      {
        // allow for Koenig lookup
        using boost::swap ;
        swap(*this, arg);
      }
    // Returns a reference to the value if this is initialized, otherwise,
    // the behaviour is UNDEFINED
    // No-throw
@ -878,44 +891,77 @@ namespace optional_detail {
 #define BOOST_OPTIONAL_STD_SWAP_INTRODUCED_AT_NS_SCOPE
 #endif
-// optional's swap:
+  template<bool use_default_constructor> struct swap_selector;
-// If both are initialized, calls swap(T&, T&). If this swap throws, both will remain initialized but their values are now unspecified.
+
-// If only one is initialized, calls U.reset(*I), THEN I.reset().
+  template<>
-// If U.reset(*I) throws, both are left UNCHANGED (U is kept uinitialized and I is never reset)
+  struct swap_selector<true>
 // If both are uninitialized, do nothing (no-throw)
 template<class T>
 inline
 void optional_swap ( optional<T>& x, optional<T>& y )
 {
  if ( !x && !!y )
  {
-    x.reset(*y);
+    template<class T>
-    y.reset();
+    static void optional_swap ( optional<T>& x, optional<T>& y )
  }
  else if ( !!x && !y )
    {
-    y.reset(*x);
+     bool hasX = x;
-    x.reset();
+     bool hasY = y;
-  }
+
-  else if ( !!x && !!y )
+     if ( !hasX && !hasY )
-  {
+       return;
-// GCC > 3.2 and all other compilers have the using declaration at function scope (FLC)
+
     if( !hasX )
         x = boost::in_place();
     else if ( !hasY )
         y = boost::in_place();
   // GCC > 3.2 and all other compilers have the using declaration at function scope (FLC)
 #ifndef BOOST_OPTIONAL_STD_SWAP_INTRODUCED_AT_NS_SCOPE
     // allow for Koenig lookup
     using std::swap ;
 #endif
     swap(*x,*y);
     if( !hasX )
         y = boost::none ;
     else if( !hasY )
         x = boost::none ;
    }
-}
+  };
  template<>
  struct swap_selector<false>
  {
    template<class T>
    static void optional_swap ( optional<T>& x, optional<T>& y )
    {
      if ( !x && !!y )
      {
        x = *y;
        y = boost::none ;
      }
      else if ( !!x && !y )
      {
        y = *x ;
        x = boost::none ;
      }
      else if ( !!x && !!y )
      {
    // GCC > 3.2 and all other compilers have the using declaration at function scope (FLC)
    #ifndef BOOST_OPTIONAL_STD_SWAP_INTRODUCED_AT_NS_SCOPE
        // allow for Koenig lookup
        using std::swap ;
    #endif
        swap(*x,*y);
      }
    }
  };
 } // namespace optional_detail
 template<class T>
 struct optional_swap_should_use_default_constructor : has_nothrow_default_constructor<T> {} ;
 template<class T> inline void swap ( optional<T>& x, optional<T>& y )
 {
-  optional_detail::optional_swap(x,y);
+  optional_detail::swap_selector<optional_swap_should_use_default_constructor<T>::value>::optional_swap(x, y);
 }
 } // namespace boost
 #endif
--- a/include/boost/optional/optional_fwd.hpp
+++ b/include/boost/optional/optional_fwd.hpp
@ -1,4 +1,4 @@
-// Copyright (C) 2003, Fernando Luis Cacciola Carballal.
+// Copyright (C) 2003, 2008 Fernando Luis Cacciola Carballal.
 //
 // Use, modification, and distribution is subject to the Boost Software
 // License, Version 1.0. (See accompanying file LICENSE_1_0.txt or copy at
@ -9,6 +9,9 @@
 // You are welcome to contact the author at:
 //  fernando_cacciola@hotmail.com
 //
 // Revisions:
 // 10 May 2008 (added swap related forward declaration) Niels Dekker
 // 
 #ifndef BOOST_OPTIONAL_OPTIONAL_FWD_FLC_19NOV2002_HPP
 #define BOOST_OPTIONAL_OPTIONAL_FWD_FLC_19NOV2002_HPP
@ -16,6 +19,10 @@ namespace boost {
 template<class T> class optional ;
 template<class T> void swap ( optional<T>& , optional<T>& ) ;
 template<class T> struct optional_swap_should_use_default_constructor ;
 } // namespace boost
 #endif
--- a/index.html
+++ b/index.html
@ -1,11 +1,11 @@
 <html>
 <head>
-<meta http-equiv="refresh" content="0; URL=doc/optional.html">
+<meta http-equiv="refresh" content="0; URL=doc/html/index.html">
 </head>
 <body>
 Automatic redirection failed, please go to
-<a href="doc/optional.html">doc/optional.html</a>.&nbsp;<hr>
+<a href="doc/html/index.html">doc/html/index.html</a>.&nbsp;<hr>
-<p><EFBFBD> Copyright Beman Dawes, 2001</p>
+<p><EFBFBD> Copyright Beman Dawes, 2001</p>
 <p>Distributed under the Boost Software License, Version 1.0. (See accompanying 
 file <a href="../../LICENSE_1_0.txt">LICENSE_1_0.txt</a> or copy 
 at <a href="http://www.boost.org/LICENSE_1_0.txt">www.boost.org/LICENSE_1_0.txt</a>)</p>
--- a/test/.cvsignore
+++ b/test/.cvsignore
@ -1 +0,0 @@
 bin
--- a/test/optional_test.cpp
+++ b/test/optional_test.cpp
@ -1,4 +1,4 @@
-// Copyright (C) 2003, Fernando Luis Cacciola Carballal.
+// Copyright (C) 2003, 2008 Fernando Luis Cacciola Carballal.
 //
 // Use, modification, and distribution is subject to the Boost Software
 // License, Version 1.0. (See accompanying file LICENSE_1_0.txt or copy at
@ -9,6 +9,9 @@
 // You are welcome to contact the author at:
 //  fernando_cacciola@hotmail.com
 //
 // Revisions:
 // 12 May 2008 (added more swap tests)
 //
 #include<iostream>
 #include<stdexcept>
 #include<string>
@ -16,6 +19,8 @@
 #define BOOST_ENABLE_ASSERT_HANDLER
 #include "boost/bind/apply.hpp" // Included just to test proper interaction with boost::apply<> as reported by Daniel Wallin
 #include "boost/mpl/bool.hpp"
 #include "boost/mpl/bool_fwd.hpp"  // For mpl::true_ and mpl::false_
 #include "boost/optional/optional.hpp"
@ -927,6 +932,337 @@ void test_conversions2()
  BOOST_CHECK(*get(&opt1) == static_cast<double>(f));
 }
 namespace optional_swap_test
 {
  class default_ctor_exception : public std::exception {} ;
  class copy_ctor_exception : public std::exception {} ;
  class assignment_exception : public std::exception {} ;
  //
  // Base class for swap test classes.  Its assignment should not be called, when swapping
  // optional<T> objects.  (The default std::swap would do so.)
  //
  class base_class_with_forbidden_assignment
  {
  public:
    base_class_with_forbidden_assignment & operator=(const base_class_with_forbidden_assignment &)
    {
      BOOST_CHECK(!"The assignment should not be used while swapping!");
      throw assignment_exception();
    }
    virtual ~base_class_with_forbidden_assignment() {}
  };
  //
  // Class without default constructor
  //
  class class_without_default_ctor : public base_class_with_forbidden_assignment
  {
  public:
    char data;
    explicit class_without_default_ctor(char arg) : data(arg) {}
  };
  //
  // Class whose default constructor should not be used by optional::swap!
  //
  class class_whose_default_ctor_should_not_be_used : public base_class_with_forbidden_assignment
  {
  public:
    char data;
    explicit class_whose_default_ctor_should_not_be_used(char arg) : data(arg) {}
    class_whose_default_ctor_should_not_be_used()
    {
      BOOST_CHECK(!"This default constructor should not be used while swapping!");
      throw default_ctor_exception();
    }
  };
  //
  // Class whose default constructor should be used by optional::swap.
  // Its copy constructor should be avoided!
  //
  class class_whose_default_ctor_should_be_used : public base_class_with_forbidden_assignment
  {
  public:
    char data;
    explicit class_whose_default_ctor_should_be_used(char arg) : data(arg) { }
    class_whose_default_ctor_should_be_used() : data('\0') { }
    class_whose_default_ctor_should_be_used(const class_whose_default_ctor_should_be_used &)
    {
      BOOST_CHECK(!"This copy constructor should not be used while swapping!");
      throw copy_ctor_exception();
    }
  };
  //
  // Class template whose default constructor should be used by optional::swap.
  // Its copy constructor should be avoided!
  //
  template <class T>
  class template_whose_default_ctor_should_be_used : public base_class_with_forbidden_assignment
  {
  public:
    T data;
    explicit template_whose_default_ctor_should_be_used(T arg) : data(arg) { }
    template_whose_default_ctor_should_be_used() : data('\0') { }
    template_whose_default_ctor_should_be_used(const template_whose_default_ctor_should_be_used &)
    {
      BOOST_CHECK(!"This copy constructor should not be used while swapping!");
      throw copy_ctor_exception();
    }
  };
  //
  // Class whose explicit constructor should be used by optional::swap.
  // Its other constructors should be avoided!
  //
  class class_whose_explicit_ctor_should_be_used : public base_class_with_forbidden_assignment
  {
  public:
    char data;
    explicit class_whose_explicit_ctor_should_be_used(char arg) : data(arg) { }
    class_whose_explicit_ctor_should_be_used()
    {
      BOOST_CHECK(!"This default constructor should not be used while swapping!");
      throw default_ctor_exception();
    }
    class_whose_explicit_ctor_should_be_used(const class_whose_explicit_ctor_should_be_used &)
    {
      BOOST_CHECK(!"This copy constructor should not be used while swapping!");
      throw copy_ctor_exception();
    }
  };
  void swap(class_whose_default_ctor_should_not_be_used & lhs, class_whose_default_ctor_should_not_be_used & rhs)
  {
    std::swap(lhs.data, rhs.data);
  }
  void swap(class_whose_default_ctor_should_be_used & lhs, class_whose_default_ctor_should_be_used & rhs)
  {
    std::swap(lhs.data, rhs.data);
  }
  void swap(class_without_default_ctor & lhs, class_without_default_ctor & rhs)
  {
    std::swap(lhs.data, rhs.data);
  }
  void swap(class_whose_explicit_ctor_should_be_used & lhs, class_whose_explicit_ctor_should_be_used & rhs)
  {
    std::swap(lhs.data, rhs.data);
  }
  template <class T>
  void swap(template_whose_default_ctor_should_be_used<T> & lhs, template_whose_default_ctor_should_be_used<T> & rhs)
  {
    std::swap(lhs.data, rhs.data);
  }
  //
  // optional<T>::swap should be customized when neither the copy constructor
  // nor the default constructor of T are supposed to be used when swapping, e.g.,
  // for the following type T = class_whose_explicit_ctor_should_be_used.
  //
  void swap(boost::optional<class_whose_explicit_ctor_should_be_used> & x, boost::optional<class_whose_explicit_ctor_should_be_used> & y)
  {
    bool hasX = x;
    bool hasY = y;
    if ( !hasX && !hasY )
     return;
    if( !hasX )
       x = boost::in_place('\0');
    else if ( !hasY )
       y = boost::in_place('\0');
    optional_swap_test::swap(*x,*y);
     if( !hasX )
         y = boost::none ;
     else if( !hasY )
         x = boost::none ;
  }
 } // End of namespace optional_swap_test.
 namespace boost {
 //
 // Compile time tweaking on whether or not swap should use the default constructor:
 //
 template <> struct optional_swap_should_use_default_constructor<
  optional_swap_test::class_whose_default_ctor_should_be_used> : mpl::true_ {} ;
 template <> struct optional_swap_should_use_default_constructor<
  optional_swap_test::class_whose_default_ctor_should_not_be_used> : mpl::false_ {} ;
 template <class T> struct optional_swap_should_use_default_constructor<
  optional_swap_test::template_whose_default_ctor_should_be_used<T> > : mpl::true_ {} ;
 //
 // Specialization of boost::swap:
 //
 template <> 
 void swap(optional<optional_swap_test::class_whose_explicit_ctor_should_be_used> & x, optional<optional_swap_test::class_whose_explicit_ctor_should_be_used> & y)
 {
  optional_swap_test::swap(x, y);
 }
 } // namespace boost
 namespace std {
 //
 // Specializations of std::swap:
 //
 template <> 
 void swap(optional_swap_test::class_whose_default_ctor_should_be_used & x, optional_swap_test::class_whose_default_ctor_should_be_used & y)
 {
  optional_swap_test::swap(x, y);
 }
 template <> 
 void swap(optional_swap_test::class_whose_default_ctor_should_not_be_used & x, optional_swap_test::class_whose_default_ctor_should_not_be_used & y)
 {
  optional_swap_test::swap(x, y);
 }
 template <> 
 void swap(optional_swap_test::class_without_default_ctor & x, optional_swap_test::class_without_default_ctor & y)
 {
  optional_swap_test::swap(x, y);
 }
 template <> 
 void swap(optional_swap_test::class_whose_explicit_ctor_should_be_used & x, optional_swap_test::class_whose_explicit_ctor_should_be_used & y)
 {
  optional_swap_test::swap(x, y);
 }
 } // namespace std
 //
 // Tests whether the swap function works properly for optional<T>.
 // Assumes that T has one data member, of type char.
 // Returns true iff the test is passed.
 //
 template <class T>
 bool test_swap_function( T const* )
 {
  const boost::unit_test::counter_t counter_before_test = boost::minimal_test::errors_counter();
  try
  {
    optional<T> obj1;
    optional<T> obj2('a');
    // Self-swap should not have any effect.
    swap(obj1, obj1);
    swap(obj2, obj2);
    BOOST_CHECK(!obj1);
    BOOST_CHECK(!!obj2 && obj2->data == 'a');
    // Call non-member swap.
    swap(obj1, obj2);
    // Test if obj1 and obj2 are really swapped.
    BOOST_CHECK(!!obj1 && obj1->data == 'a');
    BOOST_CHECK(!obj2);
    // Call non-member swap one more time.
    swap(obj1, obj2);
    // Test if obj1 and obj2 are swapped back.
    BOOST_CHECK(!obj1);
    BOOST_CHECK(!!obj2 && obj2->data == 'a');
  }
  catch(const std::exception &)
  {
    // The swap function should not throw, for our test cases.
    return false ;
  }
  return boost::minimal_test::errors_counter() == counter_before_test ;
 }
 //
 // Tests whether the optional<T>::swap member function works properly.
 // Assumes that T has one data member, of type char. 
 // Returns true iff the test is passed.
 //
 template <class T>
 bool test_swap_member_function( T const* )
 {
  const boost::unit_test::counter_t counter_before_test = boost::minimal_test::errors_counter();
  try
  {
    optional<T> obj1;
    optional<T> obj2('a');
    // Self-swap should not have any effect.
    obj1.swap(obj1);
    obj2.swap(obj2);
    BOOST_CHECK(!obj1);
    BOOST_CHECK(!!obj2 && obj2->data == 'a');
    // Call member swap.
    obj1.swap(obj2);
    // Test if obj1 and obj2 are really swapped.
    BOOST_CHECK(!!obj1 && obj1->data == 'a');
    BOOST_CHECK(!obj2);
    // Call member swap one more time.
    obj1.swap(obj2);
    // Test if obj1 and obj2 are swapped back.
    BOOST_CHECK(!obj1);
    BOOST_CHECK(!!obj2 && obj2->data == 'a');
  }
  catch(const std::exception &)
  {
    // The optional<T>::swap member function should not throw, for our test cases.
    return false ;
  }
  return boost::minimal_test::errors_counter() == counter_before_test ;
 }
 //
 // Tests compile time tweaking of swap, by means of
 // optional_swap_should_use_default_constructor.
 //
 void test_swap_tweaking()
 {
  BOOST_CHECK( test_swap_function( ARG(optional_swap_test::class_without_default_ctor) ) );
  BOOST_CHECK( test_swap_function( ARG(optional_swap_test::class_whose_default_ctor_should_be_used) ) );
  BOOST_CHECK( test_swap_function( ARG(optional_swap_test::class_whose_default_ctor_should_not_be_used) ) );
  BOOST_CHECK( test_swap_function( ARG(optional_swap_test::class_whose_explicit_ctor_should_be_used) ) );
  BOOST_CHECK( test_swap_function( ARG(optional_swap_test::template_whose_default_ctor_should_be_used<char>) ) );
  BOOST_CHECK( test_swap_member_function( ARG(optional_swap_test::class_without_default_ctor) ) );
  BOOST_CHECK( test_swap_member_function( ARG(optional_swap_test::class_whose_default_ctor_should_be_used) ) );
  BOOST_CHECK( test_swap_member_function( ARG(optional_swap_test::class_whose_default_ctor_should_not_be_used) ) );
  BOOST_CHECK( test_swap_member_function( ARG(optional_swap_test::class_whose_explicit_ctor_should_be_used) ) );
  BOOST_CHECK( test_swap_member_function( ARG(optional_swap_test::template_whose_default_ctor_should_be_used<char>) ) );
 }
 int test_main( int, char* [] )
 {
  try
@ -936,6 +1272,7 @@ int test_main( int, char* [] )
    test_no_implicit_conversions();
    test_conversions1();
    test_conversions2();
    test_swap_tweaking();
  }
  catch ( ... )
  {
Author	SHA1	Message	Date
Beman Dawes	2c839e600b	Branch at revision 46530 [SVN r46531]	2008-06-19 18:57:10 +00:00
Niels Dekker	3ebabcb2d8	Fixed syntax of optional_swap_should_use_default_constructor and swap template specializations that I added 2 days ago (changeset [45265]). Was accepted by MSVC, but rejected by other compilers. [SVN r45295]	2008-05-12 13:29:52 +00:00
Niels Dekker	63f6e7f45e	Added more optional::swap tests, especially on self swap, on specializing boost::swap for optional<T>, and on swapping optional<T> when T is a template class. [SVN r45265]	2008-05-10 14:53:51 +00:00
Niels Dekker	43eac5bb12	Added forward declaration of boost::optional_swap_should_use_default_constructor. [SVN r45264]	2008-05-10 14:42:49 +00:00
Niels Dekker	74674531c8	Replaced "using std::swap" by "using boost::swap" within optional::swap member function, hoping to fix GCC test failures, as mentioned at http://article.gmane.org/gmane.comp.lib.boost.devel/174350 "Re: [optional] problems with swap()" [SVN r44826]	2008-04-27 21:09:50 +00:00
Niels Dekker	a4572497be	Added forward declaration of optional<T>'s boost::swap overload, as mentioned at http://article.gmane.org/gmane.comp.lib.boost.devel/174350 "Re: [optional] problems with swap()" [SVN r44825]	2008-04-27 21:07:10 +00:00
Daniel James	951b49f992	Merge in documentation fixes. Apart from the change to optional's documenation Jamfile, which I included by mistake. Fixes #1659, #1661, #1684, #1685, 1687, #1690, #1801 I wrote about this at: http://lists.boost.org/Archives/boost/2008/04/136405.php Merged revisions 44585-44806 via svnmerge from https://svn.boost.org/svn/boost/branches/doc ........ r44585 \| danieljames \| 2008-04-19 16:25:27 +0100 (Sat, 19 Apr 2008) \| 2 lines Fix broken link to vacpp in bjam docs. Refs #1512 ........ r44586 \| danieljames \| 2008-04-19 16:27:36 +0100 (Sat, 19 Apr 2008) \| 2 lines Fix broken link to bcpp in bjam docs. Refs #1513 ........ r44587 \| danieljames \| 2008-04-19 16:33:58 +0100 (Sat, 19 Apr 2008) \| 2 lines DateTime documentation - Fix a link to the serialization library. Refs #1659 ........ r44588 \| danieljames \| 2008-04-19 16:35:36 +0100 (Sat, 19 Apr 2008) \| 2 lines Fix some links in interprocess & intrusive. Refs #1661 ........ r44589 \| danieljames \| 2008-04-19 16:37:39 +0100 (Sat, 19 Apr 2008) \| 2 lines Fix some links in the python docs. Refs #1684. ........ r44590 \| danieljames \| 2008-04-19 16:38:29 +0100 (Sat, 19 Apr 2008) \| 2 lines Work around a quickbook bug which is affecting the python docs. Refs #1684. ........ r44591 \| danieljames \| 2008-04-19 16:39:34 +0100 (Sat, 19 Apr 2008) \| 2 lines Fix a broken link in the numeric conversion docs. Refs #1685 ........ r44592 \| danieljames \| 2008-04-19 16:40:45 +0100 (Sat, 19 Apr 2008) \| 2 lines Fix some links in the optional docs. Refs #1687 ........ r44593 \| danieljames \| 2008-04-19 16:42:09 +0100 (Sat, 19 Apr 2008) \| 2 lines Fix link to the hash documentation from bimap. Refs #1690 ........ r44599 \| danieljames \| 2008-04-19 18:07:33 +0100 (Sat, 19 Apr 2008) \| 2 lines Fix a typo in the format library. Refs #1801 ........ r44600 \| danieljames \| 2008-04-19 19:20:59 +0100 (Sat, 19 Apr 2008) \| 1 line Initialise svnmerge. ........ r44641 \| danieljames \| 2008-04-20 18:59:47 +0100 (Sun, 20 Apr 2008) \| 2 lines Fix the lincense url in shared container iterator documentation. ........ r44642 \| danieljames \| 2008-04-20 19:00:00 +0100 (Sun, 20 Apr 2008) \| 2 lines Fix image link in the mpi documentation. ........ r44643 \| danieljames \| 2008-04-20 19:00:11 +0100 (Sun, 20 Apr 2008) \| 2 lines Fix a typo in the spirit docs. ........ r44644 \| danieljames \| 2008-04-20 19:00:23 +0100 (Sun, 20 Apr 2008) \| 2 lines Escape the slash so that quickbook doesn't think it the start of an italic section, and mess up the link. Refs #1844 ........ r44647 \| danieljames \| 2008-04-20 19:39:47 +0100 (Sun, 20 Apr 2008) \| 2 lines Fix another typo in spirit docs. ........ [SVN r44807]	2008-04-27 07:39:49 +00:00
Niels Dekker	1afed544db	Added unit tests, testing optional<T> swap improvements of revision [44766] [SVN r44767]	2008-04-25 16:52:34 +00:00
Niels Dekker	66c366d18a	Improved swap for optional<T>, co-written by Thorsten and Fernando: added support for tweaking whether swap should use T's default constructor. Added swap member function. Discussed at Boost developers' mailing list, "[optional] problems with swap()", http://lists.boost.org/Archives/boost/2008/04/135882.php [SVN r44766]	2008-04-25 16:50:32 +00:00
Matias Capeletto	472a68c920	redirect optional docs to new version [SVN r43248]	2008-02-14 17:44:21 +00:00
Matias Capeletto	3e33d4a200	optional docs fixes [SVN r43247]	2008-02-14 17:43:52 +00:00
Fernando Cacciola	95c864e119	Cast to base added to avoid a call to the convertir constructor/assignment (see Tickes 1419 and 1420) [SVN r41381]	2007-11-25 20:26:14 +00:00
Beman Dawes	9afdbe65e7	// Add or correct comment identifying Boost library this header is associated with. [SVN r41173]	2007-11-17 20:13:16 +00:00
Beman Dawes	f6518df0c4	Get rid of .cvsignore files [SVN r41107]	2007-11-15 15:20:27 +00:00