From f14a00699ca7a02028e85fb11638ff5f4a344dd7 Mon Sep 17 00:00:00 2001
From: Daniel James <daniel@calamity.org.uk>
Date: Sun, 4 Dec 2005 20:02:08 +0000
Subject: [PATCH] Test for hashing 1+epsilon, following recent boost-dev
 comments on Darwin gcc-4.0's long double.

[SVN r31907]
---
 hash/test/hash_float_test.cpp | 21 ++++++++++++++++++---
 1 file changed, 18 insertions(+), 3 deletions(-)

diff --git a/hash/test/hash_float_test.cpp b/hash/test/hash_float_test.cpp
index 3e1dd42..3dee9d6 100644
--- a/hash/test/hash_float_test.cpp
+++ b/hash/test/hash_float_test.cpp
@@ -23,8 +23,16 @@ template <class T>
 void float_tests(char const* name, T* = 0)
 {
     std::cout<<"\n"
-        "Testing " BOOST_STRINGIZE(HASH_NAMESPACE) "::hash<"<<name<<">\n"
-        "\n";
+        <<"Testing " BOOST_STRINGIZE(HASH_NAMESPACE) "::hash<"<<name<<">\n"
+        <<"\n"
+        <<"std::numeric_limits<T>::digits = "
+            <<std::numeric_limits<T>::digits<<"\n"
+        <<"std::numeric_limits<int>::digits = "
+            <<std::numeric_limits<int>::digits<<"\n"
+        <<"std::numeric_limits<std::size_t>::digits = "
+            <<std::numeric_limits<std::size_t>::digits<<"\n"
+        <<"\n"
+        ;
 
     HASH_NAMESPACE::hash<T> x1;
 
@@ -126,10 +134,17 @@ void float_tests(char const* name, T* = 0)
     BOOST_CHECK(x1(v1) == HASH_NAMESPACE::hash_value(v1));
     BOOST_CHECK(x1(v2) == HASH_NAMESPACE::hash_value(v2));
 
-    BOOST_CHECK(x1(std::numeric_limits<T>::epsilon()) != x1((T) 0));
     BOOST_CHECK(x1(std::numeric_limits<T>::epsilon()) ==
             HASH_NAMESPACE::hash_value(std::numeric_limits<T>::epsilon()));
 
+    BOOST_CHECK(x1(std::numeric_limits<T>::epsilon()) != x1((T) 0));
+    if(x1(std::numeric_limits<T>::epsilon()) == x1((T)0))
+        std::cout<<"x1(epsilon) == x1(0) == "<<x1(std::numeric_limits<T>::epsilon())<<"\n";
+
+    BOOST_CHECK(x1(std::numeric_limits<T>::epsilon()) != x1((T) 1));
+    if(x1(std::numeric_limits<T>::epsilon()) == x1((T)1))
+        std::cout<<"x1(epsilon) == x1(1) == "<<x1(std::numeric_limits<T>::epsilon())<<"\n";
+
     // As before.
     if(std::numeric_limits<T>::has_denorm) {
         if(x1(std::numeric_limits<T>::denorm_min()) == x1(zero)) {