[Boost-commit] svn:boost r65312 - in sandbox/chrono/libs/type_traits_ext: doc doc/html test

Subject: [Boost-commit] svn:boost r65312 - in sandbox/chrono/libs/type_traits_ext: doc doc/html test
From: vicente.botet_at_[hidden]
Date: 2010-09-05 15:50:30

Author: viboes
Date: 2010-09-05 15:50:30 EDT (Sun, 05 Sep 2010)
New Revision: 65312
URL: http://svn.boost.org/trac/boost/changeset/65312

Log:
update doc
Text files modified: 
   sandbox/chrono/libs/type_traits_ext/doc/html/index.html     |    45 ++++++++++++++++++++++++++++++++++----- 
   sandbox/chrono/libs/type_traits_ext/doc/type_traits_ext.qbk |     8 +++++++                                 
   sandbox/chrono/libs/type_traits_ext/test/Jamfile.v2         |     6 ++--                                    
   3 files changed, 50 insertions(+), 9 deletions(-)

Modified: sandbox/chrono/libs/type_traits_ext/doc/html/index.html
==============================================================================
--- sandbox/chrono/libs/type_traits_ext/doc/html/index.html	(original)
+++ sandbox/chrono/libs/type_traits_ext/doc/html/index.html	2010-09-05 15:50:30 EDT (Sun, 05 Sep 2010)
@@ -873,17 +873,50 @@
         and provides motivation for key design decisions.
       </p>
 </div>
-<div class="section" lang="en"><div class="titlepage"><div><div><h3 class="title">
+<div class="section" lang="en">
+<div class="titlepage"><div><div><h3 class="title">
 <a name="boost_typetraits_ext.appendices.implementation"></a><a href="index.html#boost_typetraits_ext.appendices.implementation" title=" Appendix
       C: Implementation Notes"> Appendix
       C: Implementation Notes</a>
-</h3></div></div></div></div>
+</h3></div></div></div>
+<a name="boost_typetraits_ext.appendices.implementation.common_type_c__03_implementation"></a><h4>
+<a name="id4997993"></a>
+        <a href="index.html#boost_typetraits_ext.appendices.implementation.common_type_c__03_implementation">common_type
+        C++03 implementation</a>
+      </h4>
+<p>
+        The C++03 implementation of <a href="index.html#boost_typetraits_ext.reference.common_type_hpp.common_type" title="
+        Class Template common_type&lt;&gt;"><code class="computeroutput"><span class="identifier">common_type</span></code></a> has some limitations.
+      </p>
+<div class="itemizedlist"><ul type="disc">
+<li>
+            Absence of variadic template: The number of template parameters is limited
+            to 3.
+          </li>
+<li>
+            decltype and rvalue references missing: the default common-type is based
+            on these C++0x features. When these are not present, BoostTypeOf is used
+            instead of decltype, and rvalue references are not used at all, and replaced
+            by the type itself.
+          </li>
+</ul></div>
+<p>
+        Jeffrey Lee Hellrung, Jr. has reache dto implement <a href="index.html#boost_typetraits_ext.reference.common_type_hpp.common_type" title="
+        Class Template common_type&lt;&gt;"><code class="computeroutput"><span class="identifier">common_type</span></code></a> without using Boost.TypeOf.
+        The idea is that the number of possible types of the expression <a href="index.html#boost_typetraits_ext.reference.declval_hpp.declval" title="
+        Function Template declval&lt;&gt;"><code class="computeroutput"><span class="identifier">declval</span></code></a>&lt;bool&gt;() ? <a href="index.html#boost_typetraits_ext.reference.declval_hpp.declval" title="
+        Function Template declval&lt;&gt;"><code class="computeroutput"><span class="identifier">declval</span></code></a>&lt;T&gt;() : <a href="index.html#boost_typetraits_ext.reference.declval_hpp.declval" title="
+        Function Template declval&lt;&gt;"><code class="computeroutput"><span class="identifier">declval</span></code></a>&lt;U&gt;() are limited.
+        His implementation enumerates the possible types and check if there is only
+        one common type.
+      </p>
+</div>
 <div class="section" lang="en">
 <div class="titlepage"><div><div><h3 class="title">
 <a name="boost_typetraits_ext.appendices.faq"></a> Appendix D: FAQ
 </h3></div></div></div>
 <a name="boost_typetraits_ext.appendices.faq.how_important_is_the_order_of_the_common_type_lt__gt__template_arguments_"></a><h4>
-<a name="id4998009"></a>
+<a name="id4998146"></a>
         <a href="index.html#boost_typetraits_ext.appendices.faq.how_important_is_the_order_of_the_common_type_lt__gt__template_arguments_">How
         important is the order of the common_type&lt;&gt; template arguments?</a>
       </h4>
@@ -923,7 +956,7 @@
         also undefined.
       </p>
 <a name="boost_typetraits_ext.appendices.faq.can_you_explain_the_pros_cons_of_common_type_against_boost_typeof_"></a><h4>
-<a name="id4998492"></a>
+<a name="id4998629"></a>
         <a href="index.html#boost_typetraits_ext.appendices.faq.can_you_explain_the_pros_cons_of_common_type_against_boost_typeof_">Can
         you explain the pros/cons of common_type against Boost.Typeof?</a>
       </h4>
@@ -1213,7 +1246,7 @@
       plans</a>
 </h3></div></div></div>
 <a name="boost_typetraits_ext.appendices.todo.for_later_releases"></a><h4>
-<a name="id4999121"></a>
+<a name="id4999257"></a>
         <a href="index.html#boost_typetraits_ext.appendices.todo.for_later_releases">For
         later releases</a>
       </h4>
@@ -1225,7 +1258,7 @@
 </div>
 </div>
 <table xmlns:rev="http://www.cs.rpi.edu/~gregod/boost/tools/doc/revision" width="100%"><tr>
-<td align="left"><p><small>Last revised: September 05, 2010 at 18:47:29 GMT</small></p></td>
+<td align="left"><p><small>Last revised: September 05, 2010 at 18:59:19 GMT</small></p></td>
 <td align="right"><div class="copyright-footer"></div></td>
 </tr></table>
 <hr>

Modified: sandbox/chrono/libs/type_traits_ext/doc/type_traits_ext.qbk
==============================================================================
--- sandbox/chrono/libs/type_traits_ext/doc/type_traits_ext.qbk	(original)
+++ sandbox/chrono/libs/type_traits_ext/doc/type_traits_ext.qbk	2010-09-05 15:50:30 EDT (Sun, 05 Sep 2010)
@@ -491,6 +491,14 @@
 [/======================================================]
 [section:implementation Appendix C: Implementation Notes]
 
+[heading common_type C++03 implementation]
+
+The C++03 implementation of __common_type__ has some limitations.
+
+* Absence of variadic template: The number of template parameters is limited to 3.
+* decltype and rvalue references missing: the default common-type is based on these C++0x features. When these are not present, BoostTypeOf is used instead of decltype, and rvalue references are not used at all, and replaced by the type itself.
+
+Jeffrey Lee Hellrung, Jr. has reache dto implement __common_type__ without using Boost.TypeOf. The idea is that the number of possible types of the expression __declval__<bool>() ? __declval__<T>() : __declval__<U>() are limited. His implementation enumerates the possible types and check if there is only one common type.
 
 [endsect]
 

Modified: sandbox/chrono/libs/type_traits_ext/test/Jamfile.v2
==============================================================================
--- sandbox/chrono/libs/type_traits_ext/test/Jamfile.v2	(original)
+++ sandbox/chrono/libs/type_traits_ext/test/Jamfile.v2	2010-09-05 15:50:30 EDT (Sun, 05 Sep 2010)
@@ -1,11 +1,11 @@
-# Boost Chrono Library test Jamfile
+# Boost TypeTraits.Ext Library test Jamfile
 
-# Copyright Beman Dawes 2003, 2006, 2008
+# Copyright Vicente J. Botet Excriba 2010
 
 # Distributed under the Boost Software License, Version 1.0.
 # See accompanying file LICENSE_1_0.txt or http://www.boost.org/LICENSE_1_0.txt
 
-# See library home page at http://www.boost.org/libs/chrono
+# See library home page at http://www.boost.org/libs/type_traits
 
 # uncomment one if the above lines if you build outside the Boost release
 #local BOOST_ROOT = /boost_1_41_0 ;