[boost] [rational]boost::detail::resetter warning on MSVC7.1

From: Toon Knapen (toon.knapen_at_[hidden])
Date: 2006-01-09 11:33:07

While using the boost::rational MSVC7.1 generates errors saying:

warning C4512: 'boost::detail::resetter' : assignment operator could not
be generated

So I propose following diff to boost::detail::resetter that makes this
warning go away

RCS file: /cvsroot/boost/boost/boost/rational.hpp,v
retrieving revision 1.16
diff -u -r1.16 rational.hpp
--- rational.hpp	27 Dec 2005 11:38:27 -0000	1.16
+++ rational.hpp	9 Jan 2006 16:32:12 -0000
@@ -462,11 +462,16 @@

     // A utility class to reset the format flags for an istream at end
     // of scope, even in case of exceptions
-    struct resetter {
+    class resetter {
+      public:
         resetter(std::istream& is) : is_(is), f_(is.flags()) {}
         ~resetter() { is_.flags(f_); }
         std::istream& is_;
         std::istream::fmtflags f_;      // old GNU c++ lib has no ios_base
+      private:
+        // MSVC 7.1 complains that he is unable to generate the assignment-
+        // operator so we generate it for him as to avoid the warning.
+        resetter& operator=(const resetter&) ;
     };

 }