[Boost-bugs] [Boost C++ Libraries] #12971: g++ on Windows: warning: converting to non-pointer type from NULL

Subject: [Boost-bugs] [Boost C++ Libraries] #12971: g++ on Windows: warning: converting to non-pointer type from NULL
From: Boost C++ Libraries (noreply_at_[hidden])
Date: 2017-04-14 12:58:41

#12971: g++ on Windows: warning: converting to non-pointer type from NULL
-------------------------------------------------+-------------------------
 Reporter:  Fabian Meyer <mail@…>                |      Owner:  atompkins
     Type:  Bugs                                 |     Status:  new
Milestone:  To Be Determined                     |  Component:  uuid
  Version:  Boost 1.63.0                         |   Severity:  Problem
 Keywords:  uuid, windows, warning, conversion,  |
  non-pointer, null                              |
-------------------------------------------------+-------------------------
 The following minimal program "error.cpp" generates the warning:


 {{{
 #include <boost/uuid/random_generator.hpp>

 int main()
 {
     boost::uuids::uuid id = boost::uuids::random_generator()();
 }
 }}}

 Compiling on Windows (MinGW) with

 {{{
 g++ -I D:/libraries/boost_1_63_0/ error.cpp
 }}}

 yields the following message:

 {{{
 In file included from
 D:/libraries/boost_1_63_0/boost/uuid/random_generator.hpp:12:0,
                  from error.cpp:1:
 D:/libraries/boost_1_63_0/boost/uuid/seed_rng.hpp: In constructor
 'boost::uuids::detail::seed_rng::seed_rng()':
 D:/libraries/boost_1_63_0/boost/uuid/seed_rng.hpp:96:23: warning:
 converting to non-pointer type 'boost::detail::winapi::HCRYPTPROV_ {aka
 long unsigned int}' from NULL [-Wconversion-null]
          , random_(NULL)
                        ^
 D:/libraries/boost_1_63_0/boost/uuid/seed_rng.hpp:106:21: warning:
 converting to non-pointer type 'boost::detail::winapi::HCRYPTPROV_ {aka
 long unsigned int}' from NULL [-Wconversion-null]
              random_ = NULL;
                      ^
 }}}

-- 
Ticket URL: <https://svn.boost.org/trac/boost/ticket/12971>
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