<html>
    <head>
      <base href="http://llvm.org/bugs/" />
    </head>
    <body><table border="1" cellspacing="0" cellpadding="8">
        <tr>
          <th>Bug ID</th>
          <td><a class="bz_bug_link 
          bz_status_NEW "
   title="NEW --- - Compilation error with boost::optional (from Boost 1.55)"
   href="http://llvm.org/bugs/show_bug.cgi?id=18180">18180</a>
          </td>
        </tr>

        <tr>
          <th>Summary</th>
          <td>Compilation error with boost::optional (from Boost 1.55)
          </td>
        </tr>

        <tr>
          <th>Product</th>
          <td>clang
          </td>
        </tr>

        <tr>
          <th>Version</th>
          <td>trunk
          </td>
        </tr>

        <tr>
          <th>Hardware</th>
          <td>PC
          </td>
        </tr>

        <tr>
          <th>OS</th>
          <td>Linux
          </td>
        </tr>

        <tr>
          <th>Status</th>
          <td>NEW
          </td>
        </tr>

        <tr>
          <th>Severity</th>
          <td>normal
          </td>
        </tr>

        <tr>
          <th>Priority</th>
          <td>P
          </td>
        </tr>

        <tr>
          <th>Component</th>
          <td>-New Bugs
          </td>
        </tr>

        <tr>
          <th>Assignee</th>
          <td>unassignedclangbugs@nondot.org
          </td>
        </tr>

        <tr>
          <th>Reporter</th>
          <td>benpope81@gmail.com
          </td>
        </tr>

        <tr>
          <th>CC</th>
          <td>llvmbugs@cs.uiuc.edu
          </td>
        </tr>

        <tr>
          <th>Classification</th>
          <td>Unclassified
          </td>
        </tr></table>
      <p>
        <div>
        <pre>Created <span class=""><a href="attachment.cgi?id=11690" name="attach_11690" title="Preprocessed source">attachment 11690</a> <a href="attachment.cgi?id=11690&action=edit" title="Preprocessed source">[details]</a></span>
Preprocessed source

Unfortunately I haven't managed to reduce the preprocessed output, but the gist
of it is this:

#include <boost/optional.hpp>

int main()
{
   boost::optional<int> max;
   return max == false;
}

clang++-3.4 -std=c++11 -stdlib=libc++ -I../boost/test/build/boost -lc++abi
signal_test.cpp

signal_test.cpp:6:15: error: invalid operands to binary expression
('boost::optional<int>' and 'int')
   return max == false;
          ~~~ ^  ~~~~~
../boost/test/build/boost/boost/optional/optional.hpp:838:6: note: candidate
function [with T = int] not viable: no known conversion from 'bool' to 'none_t'
(aka 'int boost::detail::none_helper::*') for 2nd
      argument
bool operator == ( optional<T> const& x, none_t )
     ^
../boost/test/build/boost/boost/optional/optional.hpp:769:6: note: candidate
template ignored: deduced conflicting types for parameter 'T' ('int' vs.
'bool')
bool operator == ( optional<T> const& x, T const& y )
     ^
../boost/test/build/boost/boost/optional/optional.hpp:735:6: note: candidate
template ignored: could not match 'optional<type-parameter-0-0>' against 'bool'
bool operator == ( optional<T> const& x, optional<T> const& y )
     ^
../boost/test/build/boost/boost/optional/optional.hpp:803:6: note: candidate
template ignored: could not match 'optional<type-parameter-0-0>' against 'bool'
bool operator == ( T const& x, optional<T> const& y )
     ^
../boost/test/build/boost/boost/optional/optional.hpp:872:6: note: candidate
template ignored: could not match 'optional<type-parameter-0-0>' against 'bool'
bool operator == ( none_t , optional<T> const& y )

This code compiles with Clang 3.3 and G++-4.8.2, but I haven't verified whether
it's correct.  Preprocessed source attached.</pre>
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