[boost] boost/functional/detail/hash_float.hpp: patch to quiet gcc warning

From: Caleb Epstein (caleb.epstein_at_[hidden])
Date: 2007-08-15 09:33:52

The for loop in float_hash_impl in <boost/functional/detail/hash_float.hpp>
generates a warning from gcc when instantiated with T = float.  Changing the
< to != quiets the warning.  Here's the warning:

/pkg/boost/include/boost/functional/detail/hash_float.hpp: In function
'size_t boost::hash_detail::float_hash_
impl(T) [with T = float]':
/pkg/boost/include/boost/functional/detail/hash_float.hpp:136:
instantiated from 'size_t boost::hash_detail:
:float_hash_value(T) [with T = float]'
/pkg/boost/include/boost/functional/hash/hash.hpp:307:   instantiated from
here
/pkg/boost/include/boost/functional/detail/hash_float.hpp:109: warning:
comparison of unsigned expression < 0
is always false

Here's the patch:

diff -ur boost-1.35.0-svn38670/include/boost/functional/detail/hash_fl
oat.hpp boost/include/boost/functional/detail/hash_float.hpp
--- boost-1.35.0-svn38670/include/boost/functional/detail/hash_float.hpp
       2007-08-15
07:52:45.838953000 -0400
+++ boost/include/boost/functional/detail/hash_float.hpp        2007-08-14
12:59:02.358904000 -0400
@@ -106,7 +106,7 @@
                         boost::static_log2<limits<T>::radix>::value - 1)
                 / limits<std::size_t>::digits;

-            for(std::size_t i = 0; i < length; ++i)
+            for(std::size_t i = 0; i != length; ++i)
             {
                 v = boost::hash_detail::call_ldexp(v,
limits<std::size_t>::digits);
                 std::size_t part = static_cast<std::size_t>(v);

-- 
Caleb Epstein