Re: [boost] [filesystem] path noncopyable error with boost 1.55.0 and g++ 4.5.1

Subject: Re: [boost] [filesystem] path noncopyable error with boost 1.55.0 and g++ 4.5.1
From: Richard Hadsell (hadsell_at_[hidden])
Date: 2014-04-09 13:28:16

On 04/09/2014 12:41 PM, Andrey Semashev wrote:
>
> FWIW, there is BOOST_NO_CXX11_NON_PUBLIC_DEFAULTED_FUNCTIONS macro in
> Boost.Config just for this case. BOOST_DEFAULTED_FUNCTION takes it into
> account.
>
That's a good pointer.  I will change noncopyable.hpp to include this flag:

+++ boost/noncopyable.hpp	9 Apr 2014 17:05:09 -0000
@@ -23,7 +23,7 @@
    class noncopyable
    {
     protected:
-#ifndef BOOST_NO_DEFAULTED_FUNCTIONS
+#if !defined(BOOST_NO_DEFAULTED_FUNCTIONS) && !defined(BOOST_NO_CXX11_NON_PUBLIC_DEFAULTED_FUNCTIONS)
      BOOST_CONSTEXPR noncopyable() = default;
      ~noncopyable() = default;
  #else

Another possible fix would be to use BOOST_DEFAULTED_FUNCTION for the constructor and destructor, but I'm not sure what happens to 'BOOST_CONSTEXPR', which is not included with the '#else' version of the constructor.  So, I'll try out the safer fix I 
suggested.

I also didn't replace BOOST_NO_DEFAULTED_FUNCTIONS with BOOST_NO_CXX11_DEFAULTED_FUNCTIONS, not knowing the current preference.

Anyway, I leave it to you to decide how to fix noncopyable.hpp for this minor incompatibility with an ancient compiler.  Since BOOST_NO_CXX11_NON_PUBLIC_DEFAULTED_FUNCTIONS exists, it seems reasonable to use it where appropriate.