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container_hash/test/hash_float_test.hpp
Daniel James 2b3bc8c3f4 Merge latest hash developments: 
* Avoid float to int warning.
 * Work around 'using namespace' bug in Visual C++.
 * Make `<boost/functional/hash/extensions.hpp> self contained.
 * Move some of the extension implementation from the main hash header
   into the exensions header.
 * Remove BOOST_HASH_CHAR_TRAITS from `container_fwd.hpp`.
 * Other minor changes.

Merged revisions 53828,53924,54024-54025,54033-54034,54139-54145,54399 via svnmerge from 
https://svn.boost.org/svn/boost/trunk

........
  r53828 | danieljames | 2009-06-12 19:24:47 +0100 (Fri, 12 Jun 2009) | 1 line
  
  Try to avoid float to int warning when a float function doesn't exist.
........
  r53924 | danieljames | 2009-06-15 08:37:42 +0100 (Mon, 15 Jun 2009) | 4 lines
  
  Remove hash_complex_test's dependency on Boost.Random.
  
  Only test for a few values, but that should be okay as there isn't much
  to test.
........
  r54024 | danieljames | 2009-06-17 22:22:49 +0100 (Wed, 17 Jun 2009) | 1 line
  
  Put the minimum amount of implementation in the same namespace as the 'using namespace' directives in order to avoid Visual C++ 8 bug.
........
  r54025 | danieljames | 2009-06-17 22:23:42 +0100 (Wed, 17 Jun 2009) | 1 line
  
  Try to avoid using special macro handling code.
........
  r54033 | danieljames | 2009-06-18 00:24:28 +0100 (Thu, 18 Jun 2009) | 1 line
  
  Add copyright to namespace_fail_test.cpp
........
  r54034 | danieljames | 2009-06-18 00:25:12 +0100 (Thu, 18 Jun 2009) | 1 line
  
  A couple of missing newlines.
........
  r54139 | danieljames | 2009-06-21 10:41:11 +0100 (Sun, 21 Jun 2009) | 1 line
  
  A few more comments in boost::hash.
........
  r54140 | danieljames | 2009-06-21 10:41:30 +0100 (Sun, 21 Jun 2009) | 1 line
  
  Move includes to the header which they're used in.
........
  r54141 | danieljames | 2009-06-21 10:41:46 +0100 (Sun, 21 Jun 2009) | 1 line
  
  Revert [54025] "Try to avoid using special macro handling code."
........
  r54142 | danieljames | 2009-06-21 10:42:05 +0100 (Sun, 21 Jun 2009) | 1 line
  
  Get <boost/functional/hash/extensions.hpp> to work.
........
  r54143 | danieljames | 2009-06-21 10:42:20 +0100 (Sun, 21 Jun 2009) | 1 line
  
  Move BOOST_HASH_CHAR_TRAITS from container_fwd into the hash headers, and undefine it.
........
  r54144 | danieljames | 2009-06-21 10:42:40 +0100 (Sun, 21 Jun 2009) | 1 line
  
  Move the support for hashing containers into the extension header, and improve the standard tests.
........
  r54145 | danieljames | 2009-06-21 10:51:59 +0100 (Sun, 21 Jun 2009) | 1 line
  
  I didn't mean to comment this out.
........
  r54399 | danieljames | 2009-06-27 08:39:12 +0100 (Sat, 27 Jun 2009) | 1 line
  
  Add am implementation note about the Visual C++ problems.
........


[SVN r54402]
2009-06-27 08:12:20 +00:00

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// Copyright 2005-2009 Daniel James.
// Distributed under the Boost Software License, Version 1.0. (See accompanying
// file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
#include "./config.hpp"
#ifdef TEST_STD_INCLUDES
# include <functional>
#else
# include <boost/functional/hash.hpp>
#endif
#include <boost/detail/lightweight_test.hpp>
#include <cmath>
#include <boost/functional/hash/detail/limits.hpp>
#include <boost/functional/hash/detail/float_functions.hpp>
#include <boost/detail/workaround.hpp>
#include <iostream>
#if defined(BOOST_MSVC)
#pragma warning(push)
#pragma warning(disable:4127) // conditional expression is constant
#endif
char const* float_type(float*) { return "float"; }
char const* float_type(double*) { return "double"; }
char const* float_type(long double*) { return "long double"; }
template <class T>
void float_tests(char const* name, T* = 0)
{
std::cerr<<"\n"
<<"Testing " BOOST_STRINGIZE(HASH_NAMESPACE) "::hash<"<<name<<">\n"
<<"\n"
<<"boost::hash_detail::limits<T>::digits = "
<<boost::hash_detail::limits<T>::digits<<"\n"
<<"boost::hash_detail::limits<int>::digits = "
<<boost::hash_detail::limits<int>::digits<<"\n"
<<"boost::hash_detail::limits<std::size_t>::digits = "
<<boost::hash_detail::limits<std::size_t>::digits<<"\n"
<<"\n"
<<"boost::hash_detail::call_ldexp<T>::float_type = "
<<float_type((BOOST_DEDUCED_TYPENAME boost::hash_detail::call_ldexp<T>::float_type*)0)<<"\n"
<<"boost::hash_detail::call_frexp<T>::float_type = "
<<float_type((BOOST_DEDUCED_TYPENAME boost::hash_detail::call_frexp<T>::float_type*)0)<<"\n"
<<"boost::hash_detail::select_hash_type<T>::type = "
<<float_type((BOOST_DEDUCED_TYPENAME boost::hash_detail::select_hash_type<T>::type*)0)<<"\n"
<<"\n"
;
HASH_NAMESPACE::hash<T> x1;
T zero = 0;
T minus_zero = (T) -1 * zero;
BOOST_TEST(zero == minus_zero);
BOOST_TEST(x1(zero) == x1(minus_zero));
#if defined(TEST_EXTENSIONS)
BOOST_TEST(x1(zero) == HASH_NAMESPACE::hash_value(zero));
BOOST_TEST(x1(minus_zero) == HASH_NAMESPACE::hash_value(minus_zero));
#endif
using namespace std;
// Doing anything with infinity causes borland to crash.
#if defined(__BORLANDC__)
std::cerr<<"Not running infinity checks on Borland, as it causes it to crash.\n";
#else
if(boost::hash_detail::limits<T>::has_infinity) {
T infinity = -log(zero);
T infinity2 = (T) 1. / zero;
T infinity3 = (T) -1. / minus_zero;
T infinity4 = boost::hash_detail::limits<T>::infinity();
T minus_infinity = log(zero);
T minus_infinity2 = (T) -1. / zero;
T minus_infinity3 = (T) 1. / minus_zero;
#if defined(TEST_EXTENSIONS)
BOOST_TEST(x1(infinity) == HASH_NAMESPACE::hash_value(infinity));
BOOST_TEST(x1(minus_infinity)
== HASH_NAMESPACE::hash_value(minus_infinity));
#endif
if(infinity == infinity2)
BOOST_TEST(x1(infinity) == x1(infinity2));
if(infinity == infinity3)
BOOST_TEST(x1(infinity) == x1(infinity3));
if(infinity == infinity4)
BOOST_TEST(x1(infinity) == x1(infinity4));
if(minus_infinity == minus_infinity2)
BOOST_TEST(x1(minus_infinity) == x1(minus_infinity2));
if(minus_infinity == minus_infinity3)
BOOST_TEST(x1(minus_infinity) == x1(minus_infinity3));
BOOST_TEST(infinity != minus_infinity);
if(x1(infinity) == x1(minus_infinity)) {
std::cerr<<"x1(infinity) == x1(-infinity) == "<<x1(infinity)<<"\n";
}
// This should really be 'has_denorm == denorm_present' but some
// compilers don't have 'denorm_present'. See also a later use.
if(boost::hash_detail::limits<T>::has_denorm) {
if(x1(boost::hash_detail::limits<T>::denorm_min()) == x1(infinity)) {
std::cerr<<"x1(denorm_min) == x1(infinity) == "<<x1(infinity)<<"\n";
}
if(x1(boost::hash_detail::limits<T>::denorm_min()) == x1(minus_infinity)) {
std::cerr<<"x1(denorm_min) == x1(-infinity) == "<<x1(minus_infinity)<<"\n";
}
}
if(boost::hash_detail::limits<T>::has_quiet_NaN) {
if(x1(boost::hash_detail::limits<T>::quiet_NaN()) == x1(infinity)) {
std::cerr<<"x1(quiet_NaN) == x1(infinity) == "<<x1(infinity)<<"\n";
}
if(x1(boost::hash_detail::limits<T>::quiet_NaN()) == x1(minus_infinity)) {
std::cerr<<"x1(quiet_NaN) == x1(-infinity) == "<<x1(minus_infinity)<<"\n";
}
}
}
#endif
T max = (boost::hash_detail::limits<T>::max)();
T half_max = max / 2;
T quarter_max = max / 4;
T three_quarter_max = max - quarter_max;
// Check the limits::max is in range.
BOOST_TEST(max != half_max);
BOOST_TEST(max != quarter_max);
BOOST_TEST(max != three_quarter_max);
BOOST_TEST(half_max != quarter_max);
BOOST_TEST(half_max != three_quarter_max);
BOOST_TEST(quarter_max != three_quarter_max);
#if defined(TEST_EXTENSIONS)
BOOST_TEST(x1(max) == HASH_NAMESPACE::hash_value(max));
BOOST_TEST(x1(half_max) == HASH_NAMESPACE::hash_value(half_max));
BOOST_TEST(x1(quarter_max) == HASH_NAMESPACE::hash_value(quarter_max));
BOOST_TEST(x1(three_quarter_max) == HASH_NAMESPACE::hash_value(three_quarter_max));
#endif
// The '!=' tests could legitimately fail, but with my hash it indicates a bug.
BOOST_TEST(x1(max) == x1(max));
BOOST_TEST(x1(max) != x1(quarter_max));
BOOST_TEST(x1(max) != x1(half_max));
BOOST_TEST(x1(max) != x1(three_quarter_max));
BOOST_TEST(x1(quarter_max) == x1(quarter_max));
BOOST_TEST(x1(quarter_max) != x1(half_max));
BOOST_TEST(x1(quarter_max) != x1(three_quarter_max));
BOOST_TEST(x1(half_max) == x1(half_max));
BOOST_TEST(x1(half_max) != x1(three_quarter_max));
BOOST_TEST(x1(three_quarter_max) == x1(three_quarter_max));
// Intel with gcc stdlib sometimes segfaults on calls to asin and acos.
#if !((defined(__INTEL_COMPILER) || defined(__ICL) || \
defined(__ICC) || defined(__ECC)) && \
(defined(__GLIBCPP__) || defined(__GLIBCXX__)))
T v1 = asin((T) 1);
T v2 = acos((T) 0);
if(v1 == v2)
BOOST_TEST(x1(v1) == x1(v2));
#if defined(TEST_EXTENSIONS)
BOOST_TEST(x1(v1) == HASH_NAMESPACE::hash_value(v1));
BOOST_TEST(x1(v2) == HASH_NAMESPACE::hash_value(v2));
#endif
#endif
#if defined(TEST_EXTENSIONS)
BOOST_TEST(x1(boost::hash_detail::limits<T>::epsilon()) ==
HASH_NAMESPACE::hash_value(boost::hash_detail::limits<T>::epsilon()));
#endif
BOOST_TEST(boost::hash_detail::limits<T>::epsilon() != (T) 0);
if(x1(boost::hash_detail::limits<T>::epsilon()) == x1((T) 0))
std::cerr<<"x1(epsilon) == x1(0) == "<<x1((T) 0)<<"\n";
BOOST_TEST(-boost::hash_detail::limits<T>::epsilon() != (T) 0);
if(x1(-boost::hash_detail::limits<T>::epsilon()) == x1((T) 0))
std::cerr<<"x1(-epsilon) == x1(0) == "<<x1((T) 0)<<"\n";
BOOST_TEST((T) 1 + boost::hash_detail::limits<T>::epsilon() != (T) 1);
if(x1((T) 1 + boost::hash_detail::limits<T>::epsilon()) == x1((T) 1))
std::cerr<<"x1(1 + epsilon) == x1(1) == "<<x1((T) 1)<<"\n";
BOOST_TEST((T) 1 - boost::hash_detail::limits<T>::epsilon() != (T) 1);
if(x1((T) 1 - boost::hash_detail::limits<T>::epsilon()) == x1((T) 1))
std::cerr<<"x1(1 - epsilon) == x1(1) == "<<x1((T) 1)<<"\n";
BOOST_TEST((T) -1 + boost::hash_detail::limits<T>::epsilon() != (T) -1);
if(x1((T) -1 + boost::hash_detail::limits<T>::epsilon()) == x1((T) -1))
std::cerr<<"x1(-1 + epsilon) == x1(-1) == "<<x1((T) -1)<<"\n";
BOOST_TEST((T) -1 - boost::hash_detail::limits<T>::epsilon() != (T) -1);
if(x1((T) -1 - boost::hash_detail::limits<T>::epsilon()) == x1((T) -1))
std::cerr<<"x1(-1 - epsilon) == x1(-1) == "<<x1((T) -1)<<"\n";
// As before.
if(boost::hash_detail::limits<T>::has_denorm) {
if(x1(boost::hash_detail::limits<T>::denorm_min()) == x1(zero)) {
std::cerr<<"x1(denorm_min) == x1(zero) == "<<x1(zero)<<"\n";
}
#if !BOOST_WORKAROUND(__DECCXX_VER,<70190006) && defined(TEST_EXTENSIONS)
// The Tru64/CXX standard library prior to 7.1 contains a bug in the
// specialization of boost::hash_detail::limits::denorm_min() for long
// doubles which causes this test to fail.
if(x1(boost::hash_detail::limits<T>::denorm_min()) !=
HASH_NAMESPACE::hash_value(boost::hash_detail::limits<T>::denorm_min()))
{
std::cerr<<"x1(boost::hash_detail::limits<T>::denorm_min()) = "
<< x1(boost::hash_detail::limits<T>::denorm_min())
<< "\nhash_value(boost::hash_detail::limits<T>::denorm_min()) = "
<< HASH_NAMESPACE::hash_value(
boost::hash_detail::limits<T>::denorm_min())
<< "\nx1(0) = "<<x1(0)<<"\n";
}
#endif
}
// NaN also causes borland to crash.
#if !defined(__BORLANDC__) && defined(TEST_EXTENSIONS)
if(boost::hash_detail::limits<T>::has_quiet_NaN) {
if(x1(boost::hash_detail::limits<T>::quiet_NaN()) == x1(1.0)) {
std::cerr<<"x1(quiet_NaN) == x1(1.0) == "<<x1(1.0)<<"\n";
}
BOOST_TEST(x1(boost::hash_detail::limits<T>::quiet_NaN()) ==
HASH_NAMESPACE::hash_value(boost::hash_detail::limits<T>::quiet_NaN()));
}
#endif
}
#if defined(BOOST_MSVC)
#pragma warning(pop)
#endif
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