[boost] [thread] wrong guard for explicit bool operators (c++11)

Subject: [boost] [thread] wrong guard for explicit bool operators (c++11)
From: Juergen Hunold (juergen.hunold_at_[hidden])
Date: 2012-02-09 04:02:31

Hi Vicente,

your commit
New Revision: 76951
URL: http://svn.boost.org/trac/boost/changeset/76951

Thread: Added explicit to operator bool for locks (11 hours ago) 

leads to the following errors when using gcc-4.6.1 in non-c++11 mode:
$BOOST_ROOT/boost/thread/locks.hpp:1323:34: warning: explicit conversion 
operators only available with -std=c++0x or -std=gnu++0x [enabled by default]

It seems that the guards checking for explicit conversion operators are wrong.

-#ifndef BOOST_NO_EXPLICIT_CONVERSION_OPERATORS
+#if defined(BOOST_NO_EXPLICIT_CONVERSION_OPERATORS)

Patch attached. Ok to commit?

Yours,

Jürgen
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