[Boost-commit] svn:boost r56343 - trunk/boost/spirit/home/support/char_encoding

Subject: [Boost-commit] svn:boost r56343 - trunk/boost/spirit/home/support/char_encoding
From: hartmut.kaiser_at_[hidden]
Date: 2009-09-21 13:54:35

Author: hkaiser
Date: 2009-09-21 13:54:33 EDT (Mon, 21 Sep 2009)
New Revision: 56343
URL: http://svn.boost.org/trac/boost/changeset/56343

Log:
Spirit: silencing a warning
Text files modified: 
   trunk/boost/spirit/home/support/char_encoding/standard_wide.hpp |    13 +++++++++----                           
   1 files changed, 9 insertions(+), 4 deletions(-)

Modified: trunk/boost/spirit/home/support/char_encoding/standard_wide.hpp
==============================================================================
--- trunk/boost/spirit/home/support/char_encoding/standard_wide.hpp	(original)
+++ trunk/boost/spirit/home/support/char_encoding/standard_wide.hpp	2009-09-21 13:54:33 EDT (Mon, 21 Sep 2009)
@@ -60,10 +60,15 @@
         static bool
         ischar(int ch)
         {
-            // we have to watch out for sign extensions
-            return ( 0 == (ch & ~traits::wchar_t_size<sizeof(wchar_t)>::mask) || 
-                    ~0 == (ch | traits::wchar_t_size<sizeof(wchar_t)>::mask)) ? 
-                true : false;     // any wchar_t, but no other bits set
+            // we have to watch out for sign extensions (casting is there to 
+            // silence certain compilers complaining about signed/unsigned
+            // mismatch)
+            return (
+                std::size_t(0) == 
+                    std::size_t(ch & ~traits::wchar_t_size<sizeof(wchar_t)>::mask) || 
+                std::size_t(~0) == 
+                    std::size_t(ch | traits::wchar_t_size<sizeof(wchar_t)>::mask)
+            ) ? true : false;     // any wchar_t, but no other bits set
         }
 
         static bool