add explicit bool operator to negate to silence msvc warnings - closes #1307

2012-07-12 16:38:13 -07:00 · 2012-07-12 16:38:13 -07:00 · 02644aeed1
commit 02644aeed1
parent d828377c7c
1 changed files with 5 additions and 0 deletions
--- a/include/mapnik/value.hpp
+++ b/include/mapnik/value.hpp
@ -577,6 +577,11 @@ struct negate : public boost::static_visitor<V>
        return val;
    }

+    value_type operator() (bool val) const
+    {
+        return val ? -1 : 0;
+    }
+
    value_type operator() (UnicodeString const& ustr) const
    {
        UnicodeString inplace(ustr);