id,summary,reporter,owner,description,type,status,milestone,component,version,severity,resolution,keywords,cc
5870,The warning stack is not maintained,Tsukasa Kusakabe <kusakabe@…>,Gennadiy Rozental," === Problem ===
When ""#include"" is executed for the following file, the warning stack is destroyed.
The cause is a misuse of ""#pragma warning(default: warning-number-list)"".

File list
 * boost/test/utils/nullstream.hpp
 * boost/test/utils/iterator/ifstream_line_iterator.hpp

 === Impact ===
When the VisualStudio user uses a specific header, a part of a necessary warning is not displayed.

 === Reproduction code ===
{{{
#!cpp

#include <boost/config.hpp>
#pragma warning(error: 4193)

//boost/test/utils/nullstream.hpp
#pragma warning(pop) // => warning C4193
#include <boost/test/utils/nullstream.hpp>
#pragma warning(pop) // !!! There is not warning. !!!

//boost/test/utils/iterator/ifstream_line_iterator.hpp
#pragma warning(pop) // => warning C4193
#include <boost/test/utils/iterator/ifstream_line_iterator.hpp>
#pragma warning(pop) // !!! There is not warning. !!!

int main() {
  return 0;
}
}}}

 === Patch ===
{{{
#!diff

Index: boost/program_options/parsers.hpp
Index: boost/test/utils/iterator/ifstream_line_iterator.hpp
===================================================================
--- boost/test/utils/iterator/ifstream_line_iterator.hpp	(revision 74236)
+++ boost/test/utils/iterator/ifstream_line_iterator.hpp	(working copy)
@@ -86,7 +86,7 @@
 };
 
 #ifdef BOOST_MSVC
-# pragma warning(default: 4355)
+# pragma warning(pop)
 #endif
 
 typedef basic_ifstream_line_iterator<char>      ifstream_line_iterator;
Index: boost/test/utils/nullstream.hpp
===================================================================
--- boost/test/utils/nullstream.hpp	(revision 74236)
+++ boost/test/utils/nullstream.hpp	(working copy)
@@ -85,7 +85,7 @@
 };
 
 #ifdef BOOST_MSVC
-# pragma warning(default: 4355)
+# pragma warning(pop)
 #endif
 
 typedef basic_onullstream<char>      onullstream;
}}}

 === Environment ===
 * OS: Windows 7 Professional SP1
 * Compiler:
{{{
Microsoft Visual Studio 2010
Version 10.0.30319.1 RTMRel
Microsoft .NET Framework
Version 4.0.30319 RTMRel
}}}

 === Comments ===
Division origin #5577
",Bugs,closed,Boost 1.59.0,test,Boost 1.48.0,Problem,fixed,,