libs/functional/hash/test/hash_complex_test.cpp

   1
   2 // Copyright 2005-2009 Daniel James.
   3 // Distributed under the Boost Software License, Version 1.0. (See accompanying
   4 // file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
   5
   6 #include "./config.hpp"
   7
   8 #if !defined(BOOST_HASH_TEST_EXTENSIONS)
   9
  10 int main() {}
  11
  12 #else
  13
  14 #ifdef BOOST_HASH_TEST_STD_INCLUDES
  15 #  include <functional>
  16 #else
  17 #  include <boost/functional/hash.hpp>
  18 #endif
  19
  20 #include <boost/detail/lightweight_test.hpp>
  21
  22 #if defined(BOOST_MSVC)
  23 #pragma warning(disable:4244)   // conversion from 'unsigned long' to
  24                                 // 'unsigned short', possible loss of data
  25 #pragma warning(disable:4245)   // conversion from 'int' to
  26                                 // 'const unsigned short',
  27                                 // signed/unsigned mismatch
  28 #pragma warning(disable:4305)   // truncation from 'double' to
  29                                 // 'const std::complex<float>::_Ty'
  30 #pragma warning(disable:4309)   // truncation of constant value
  31 #pragma warning(disable:4512)   // assignment operator could not be generated
  32 #if BOOST_MSVC < 1400
  33 #pragma warning(disable:4267)   // conversion from 'size_t' to 'unsigned int',
  34                                 // possible loss of data
  35 #endif
  36 #endif
  37
  38 #if defined(__GNUC__) && !defined(BOOST_INTEL_CXX_VERSION)
  39 #pragma GCC diagnostic ignored "-Wfloat-equal"
  40 #endif
  41
  42 #include <complex>
  43 #include <sstream>
  44 #include <boost/limits.hpp>
  45
  46 template <class T>
  47 void generic_complex_tests(std::complex<T> v)
  48 {
  49     BOOST_HASH_TEST_NAMESPACE::hash<std::complex<T> > complex_hasher;
  50
  51     BOOST_TEST(complex_hasher(v) == complex_hasher(v));
  52
  53     BOOST_HASH_TEST_NAMESPACE::hash<T> real_hasher;
  54     T real = v.real();
  55     T imag = v.imag();
  56
  57     BOOST_TEST(real_hasher(real) == complex_hasher(std::complex<T>(real)));
  58
  59     if(imag != 0 && real_hasher(real) == complex_hasher(v)) {
  60         std::ostringstream os;
  61         os<<"real_hasher("<<real<<") == complex_hasher("
  62             <<v.real()<<" + "<<v.imag()<<"i) == "
  63             <<real_hasher(real)<<" (This might not be a bug).";
  64         BOOST_ERROR(os.str().c_str());
  65     }
  66 }
  67
  68 template <class Float>
  69 void complex_float_tests(Float*)
  70 {
  71     typedef std::complex<Float> complex;
  72     generic_complex_tests(complex(0,0));
  73     generic_complex_tests(complex(0.5,0));
  74     generic_complex_tests(complex(25,0));
  75     generic_complex_tests(complex(25,0));
  76     generic_complex_tests(complex(static_cast<Float>(-67.5324535),static_cast<Float>(56.23578678)));
  77 }
  78
  79 template <class Integer>
  80 void complex_integral_tests(Integer*)
  81 {
  82     typedef std::complex<Integer> complex;
  83     generic_complex_tests(complex(0,0));
  84     generic_complex_tests(complex(15342,124));
  85     generic_complex_tests(complex(25,54356));
  86     generic_complex_tests(complex(5325,2346));
  87     generic_complex_tests(complex(-243897,-49923874));
  88     generic_complex_tests(complex(-543,763));
  89 }
  90
  91 int main()
  92 {
  93     // I've comments out the short and unsigned short tests
  94     // as they cause warnings and don't really test
  95     // anything that the other tests already deal with.
  96
  97     complex_float_tests((float*) 0);
  98     complex_float_tests((double*) 0);
  99     complex_float_tests((long double*) 0);
 100     //complex_integral_tests((short*) 0);
 101     complex_integral_tests((int*) 0);
 102     complex_integral_tests((long*) 0);
 103     //complex_integral_tests((unsigned short*) 0);
 104     complex_integral_tests((unsigned int*) 0);
 105     complex_integral_tests((unsigned long*) 0);
 106
 107     return boost::report_errors();
 108 }
 109
 110 #endif // BOOST_HASH_TEST_EXTENSIONS