Fix the link to the book example in the hash source documentation.

[SVN r31153]

doc/hash.qbk

@@ -180,7 +180,7 @@ And you can now use __boost_hash with book:
     assert(books.find(dandelion) == books.end());
 
 The full example can be found in:
-[@../../libs/functional/hash/examples/books.cpp /libs/functional/hash/examples/books.hpp]
+[@../../libs/functional/hash/examples/books.hpp /libs/functional/hash/examples/books.hpp]
 and
 [@../../libs/functional/hash/examples/books.cpp /libs/functional/hash/examples/books.cpp].
 
@@ -209,7 +209,7 @@ Say you have a point class, representing a two dimensional location:
 
         bool operator==(point const& other) const
         {
-            return x = other.x && y == other.y;
+            return x == other.x && y == other.y;
         }
     };
 

examples/point.cpp

@@ -20,7 +20,7 @@ public:
 
     bool operator==(point const& other) const
     {
-        return x = other.x && y == other.y;
+        return x == other.x && y == other.y;
     }
 
     friend std::size_t hash_value(point const& p)
@@ -49,3 +49,4 @@ int main()
     assert(point_hasher(p1) != point_hasher(p2));
     assert(point_hasher(p1) != point_hasher(p3));
 }
+

test/hash_float_test.cpp

@@ -86,7 +86,6 @@ void float_tests(char const* name, T* = 0)
                 std::cout<<"x1(denorm_min) == x1(-infinity) == "<<x1(minus_infinity)<<"\n";
             }
         }
-
         if(std::numeric_limits<T>::has_quiet_NaN) {
             if(x1(std::numeric_limits<T>::quiet_NaN()) == x1(infinity)) {
                 std::cout<<"x1(quiet_NaN) == x1(infinity) == "<<x1(infinity)<<"\n";
@@ -136,6 +135,10 @@ void float_tests(char const* name, T* = 0)
         if(x1(std::numeric_limits<T>::denorm_min()) == x1(zero)) {
             std::cout<<"x1(denorm_min) == x1(zero) == "<<x1(zero)<<"\n";
         }
+#if !BOOST_WORKAROUND(__DECCXX_VER,<70190006)
+        // The Tru64/CXX standard library prior to 7.1 contains a bug in the
+        // specialization of std::numeric_limits::denorm_min() for long
+        // doubles which causes this test to fail.
         BOOST_CHECK_MESSAGE(x1(std::numeric_limits<T>::denorm_min()) ==
             HASH_NAMESPACE::hash_value(std::numeric_limits<T>::denorm_min()),
             "x1(std::numeric_limits<T>::denorm_min()) = "
@@ -144,6 +147,7 @@ void float_tests(char const* name, T* = 0)
                 << HASH_NAMESPACE::hash_value(
                     std::numeric_limits<T>::denorm_min())
                 << "\nx1(0) = "<<x1(0)<<"\n");
+#endif
     }
 
 // NaN also causes borland to crash.