ceph/src/boost/libs/numeric/conversion/test/numeric_cast_test.cpp

   1 //  boost utility cast test program  -----------------------------------------//
   2
   3 //  (C) Copyright Beman Dawes, Dave Abrahams 1999. Distributed under the Boost
   4 //  Software License, Version 1.0. (See accompanying file
   5 //  LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
   6
   7 //  See http://www.boost.org for most recent version including documentation.
   8
   9 //  Revision History
  10 //   28 Set 04  taken from the old cast library (Fernando Cacciola)
  11
  12 #include <iostream>
  13 #include <climits>
  14 #include <cfloat>   // for DBL_MAX (Peter Schmid)
  15
  16 #include <boost/numeric/conversion/cast.hpp>
  17
  18 #include "boost/test/minimal.hpp"
  19
  20 #  if SCHAR_MAX == LONG_MAX
  21 #      error "This test program doesn't work if SCHAR_MAX == LONG_MAX"
  22 #  endif
  23
  24 using namespace boost;
  25 using std::cout;
  26
  27 int test_main( int argc, char * argv[] )
  28 {
  29
  30 #   ifdef NDEBUG
  31         cout << "NDEBUG is defined\n";
  32 #   else
  33         cout << "NDEBUG is not defined\n";
  34 #   endif
  35
  36     cout << "\nBeginning tests...\n";
  37
  38 //  test implicit_cast and numeric_cast  -------------------------------------//
  39
  40     //  tests which should succeed
  41     long small_value = 1;
  42     long small_negative_value = -1;
  43     long large_value = LONG_MAX;
  44     long large_negative_value = LONG_MIN;
  45     signed char c = 0;
  46
  47     c = large_value;  // see if compiler generates warning
  48
  49     c = numeric_cast<signed char>( small_value );
  50     BOOST_CHECK( c == 1 );
  51     c = 0;
  52     c = numeric_cast<signed char>( small_value );
  53     BOOST_CHECK( c == 1 );
  54     c = 0;
  55     c = numeric_cast<signed char>( small_negative_value );
  56     BOOST_CHECK( c == -1 );
  57
  58     // These tests courtesy of Joe R NWP Swatosh<joe.r.swatosh@usace.army.mil>
  59     BOOST_CHECK( 0.0f == numeric_cast<float>( 0.0 ) );
  60     BOOST_CHECK( 0.0 == numeric_cast<double>( 0.0 ) );
  61
  62     //  tests which should result in errors being detected
  63
  64     bool caught_exception = false;
  65     try { c = numeric_cast<signed char>( large_value ); }
  66     catch ( numeric::bad_numeric_cast )
  67         { cout<<"caught bad_numeric_cast #1\n"; caught_exception = true; }
  68     BOOST_CHECK ( caught_exception );
  69
  70     caught_exception = false;
  71     try { c = numeric_cast<signed char>( large_negative_value ); }
  72     catch ( numeric::bad_numeric_cast )
  73         { cout<<"caught bad_numeric_cast #2\n"; caught_exception = true; }
  74     BOOST_CHECK ( caught_exception );
  75
  76     unsigned long ul;
  77     caught_exception = false;
  78     try { ul = numeric_cast<unsigned long>( large_negative_value ); }
  79     catch ( numeric::bad_numeric_cast )
  80         { cout<<"caught bad_numeric_cast #3\n"; caught_exception = true; }
  81     BOOST_CHECK ( caught_exception );
  82
  83     caught_exception = false;
  84     try { ul = numeric_cast<unsigned long>( small_negative_value ); }
  85     catch ( numeric::bad_numeric_cast )
  86         { cout<<"caught bad_numeric_cast #4\n"; caught_exception = true; }
  87     BOOST_CHECK ( caught_exception );
  88
  89     caught_exception = false;
  90     try { numeric_cast<int>( DBL_MAX ); }
  91     catch ( numeric::bad_numeric_cast )
  92         { cout<<"caught bad_numeric_cast #5\n"; caught_exception = true; }
  93     BOOST_CHECK ( caught_exception );
  94
  95     return 0 ;
  96
  97 }   // main