libstdc++-v3/testsuite/decimal/incdec-memfunc.cc

   1 // Copyright (C) 2009-2022 Free Software Foundation, Inc.
   2 //
   3 // This file is part of the GNU ISO C++ Library.  This library is free
   4 // software; you can redistribute it and/or modify it under the
   5 // terms of the GNU General Public License as published by the
   6 // Free Software Foundation; either version 3, or (at your option)
   7 // any later version.
   8
   9 // This library is distributed in the hope that it will be useful,
  10 // but WITHOUT ANY WARRANTY; without even the implied warranty of
  11 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  12 // GNU General Public License for more details.
  13
  14 // You should have received a copy of the GNU General Public License along
  15 // with this library; see the file COPYING3.  If not see
  16 // <http://www.gnu.org/licenses/>.
  17
  18 // { dg-require-effective-target dfp }
  19
  20 // ISO/IEC TR 24733  3.2.2.5  Increment and decrement operators (decimal32).
  21 // ISO/IEC TR 24733  3.2.3.5  Increment and decrement operators (decimal64).
  22 // ISO/IEC TR 24733  3.2.4.5  Increment and decrement operators (decimal128).
  23
  24 // Access member functions directly.
  25
  26 #include <decimal/decimal>
  27 #include <testsuite_hooks.h>
  28
  29 // Use extension to replace implicit long long conversion with function call.
  30 #define LONGLONG(X) decimal_to_long_long(X)
  31
  32 using namespace std::decimal;
  33
  34 void
  35 incdec32 (void)
  36 {
  37   int ival;
  38   decimal32 a(11), b, c;
  39
  40   // Verify that we get the expected value of b after assignment.
  41   b = a;
  42   ival = LONGLONG (b); VERIFY (ival == 11);
  43
  44   // Check that the increment and decrement operators change the value
  45   // of the original class.
  46   b = a;
  47   b.operator++();
  48   ival = LONGLONG (b); VERIFY (ival == 12);
  49
  50   b = a;
  51   b.operator++(1);
  52   ival = LONGLONG (b); VERIFY (ival == 12);
  53
  54   b = a;
  55   b.operator--();
  56   ival = LONGLONG (b); VERIFY (ival == 10);
  57
  58   b = a;
  59   b.operator--(1);
  60   ival = LONGLONG (b); VERIFY (ival == 10);
  61
  62   // Check that the increment and decrement operators return the
  63   // correct value.
  64   b = a;
  65   c = b.operator++();
  66   ival = LONGLONG (c); VERIFY (ival == 12);
  67
  68   b = a;
  69   c = b.operator++(1);
  70   ival = LONGLONG (c); VERIFY (ival == 11);
  71
  72   b = a;
  73   c = b.operator--();
  74   ival = LONGLONG (c); VERIFY (ival == 10);
  75
  76   b = a;
  77   c = b.operator--(1);
  78   ival = LONGLONG (c); VERIFY (ival == 11);
  79 }
  80
  81 void
  82 incdec64 (void)
  83 {
  84   int ival;
  85   decimal64 a(11), b, c;
  86
  87   // Verify that we get the expected value of b after assignment.
  88   b = a;
  89   ival = LONGLONG (b); VERIFY (ival == 11);
  90
  91   // Check that the increment and decrement operators change the value
  92   // of the original class.
  93   b = a;
  94   b.operator++();
  95   ival = LONGLONG (b); VERIFY (ival == 12);
  96
  97   b = a;
  98   b.operator++(1);
  99   ival = LONGLONG (b); VERIFY (ival == 12);
 100
 101   b = a;
 102   b.operator--();
 103   ival = LONGLONG (b); VERIFY (ival == 10);
 104
 105   b = a;
 106   b.operator--(1);
 107   ival = LONGLONG (b); VERIFY (ival == 10);
 108
 109   // Check that the increment and decrement operators return the
 110   // correct value.
 111   b = a;
 112   c = b.operator++();
 113   ival = LONGLONG (c); VERIFY (ival == 12);
 114
 115   b = a;
 116   c = b.operator++(1);
 117   ival = LONGLONG (c); VERIFY (ival == 11);
 118
 119   b = a;
 120   c = b.operator--();
 121   ival = LONGLONG (c); VERIFY (ival == 10);
 122
 123   b = a;
 124   c = b.operator--(1);
 125   ival = LONGLONG (c); VERIFY (ival == 11);
 126 }
 127
 128 void
 129 incdec128 (void)
 130 {
 131   int ival;
 132   decimal128 a(11), b, c;
 133
 134   // Verify that we get the expected value of b after assignment.
 135   b = a;
 136   ival = LONGLONG (b); VERIFY (ival == 11);
 137
 138   // Check that the increment and decrement operators change the value
 139   // of the original class.
 140   b = a;
 141   b.operator++();
 142   ival = LONGLONG (b); VERIFY (ival == 12);
 143
 144   b = a;
 145   b.operator++(1);
 146   ival = LONGLONG (b); VERIFY (ival == 12);
 147
 148   b = a;
 149   b.operator--();
 150   ival = LONGLONG (b); VERIFY (ival == 10);
 151
 152   b = a;
 153   b.operator--(1);
 154   ival = LONGLONG (b); VERIFY (ival == 10);
 155
 156   // Check that the increment and decrement operators return the
 157   // correct value.
 158   b = a;
 159   c = b.operator++();
 160   ival = LONGLONG (c); VERIFY (ival == 12);
 161
 162   b = a;
 163   c = b.operator++(1);
 164   ival = LONGLONG (c); VERIFY (ival == 11);
 165
 166   b = a;
 167   c = b.operator--();
 168   ival = LONGLONG (c); VERIFY (ival == 10);
 169
 170   b = a;
 171   c = b.operator--(1);
 172   ival = LONGLONG (c); VERIFY (ival == 11);
 173 }
 174
 175 int
 176 main ()
 177 {
 178   incdec32 ();
 179   incdec64 ();
 180   incdec128 ();
 181 }