[Boost-bugs] [Boost C++ Libraries] #2961: Boost 1.38.0 fails to compile on g++-4.0.2

Subject: [Boost-bugs] [Boost C++ Libraries] #2961: Boost 1.38.0 fails to compile on g++-4.0.2
From: Boost C++ Libraries (noreply_at_[hidden])
Date: 2009-04-19 17:20:57

#2961: Boost 1.38.0 fails to compile on g++-4.0.2
---------------------------------------------+------------------------------
 Reporter:  Alex Shapiro <alexsh_at_[hidden]>  |       Owner:  johnmaddock
     Type:  Bugs                             |      Status:  new        
Milestone:  Boost 1.39.0                     |   Component:  math       
  Version:  Boost 1.38.0                     |    Severity:  Showstopper
 Keywords:  4.0.2, math, test_is_policy      |  
---------------------------------------------+------------------------------
 Boost 1.38.0 fails to compile on g++-4.0.2 on x86 Linux (while -4.0.1 is a
 tested target). The code compiles on g++-3.4.3.

 The offending file is
 source:/tags/release/Boost_1_38_0/boost/math/policies/policy.hpp . I'm
 sorry, that I don't have the full error message here, it's at work, and I
 don't have the specific compiler setup at home.

 {{{
 namespace detail{

 template <class A1,
           class A2,
           class A3,
           class A4,
           class A5,
           class A6,
           class A7,
           class A8,
           class A9,
           class A10,
           class A11>
 char test_is_policy(const policy<A1,A2,A3,A4,A5,A6,A7,A8,A9,A10,A11>*);
 double test_is_policy(...);

 template <class P>
 struct is_policy_imp
 {
    BOOST_STATIC_CONSTANT(bool, value =
 (sizeof(test_is_policy(static_cast<P*>(0))) == 1));
 };

 }
 }}}

 The error says that:
 {{{ "test_is_policy" undefined at scope }}}, at line {{{
 BOOST_STATIC_CONSTANT(bool, value =
 (sizeof(test_is_policy(static_cast<P*>(0))) == 1)); }}}

 Solution:

 Replace {{{ sizeof(test_is_policy(static_cast<P*>(0))) }}} with {{{
 sizeof(boost::math::policy::detail::test_is_policy(static_cast<P*>(0)))
 }}}

 Note: the same fix probably applies to
 source:/trunk/boost/math/policies/policy.hpp

-- 
Ticket URL: <https://svn.boost.org/trac/boost/ticket/2961>
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