libstdc++-v3/testsuite/27_io/basic_istream/extractors_arithmetic/char/dr696.cc

   1 // 2009-07-15  Paolo Carlini  <paolo.carlini@oracle.com>
   2 //
   3 // Copyright (C) 2009-2022 Free Software Foundation, Inc.
   4 //
   5 // This file is part of the GNU ISO C++ Library.  This library is free
   6 // software; you can redistribute it and/or modify it under the
   7 // terms of the GNU General Public License as published by the
   8 // Free Software Foundation; either version 3, or (at your option)
   9 // any later version.
  10
  11 // This library is distributed in the hope that it will be useful,
  12 // but WITHOUT ANY WARRANTY; without even the implied warranty of
  13 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14 // GNU General Public License for more details.
  15
  16 // You should have received a copy of the GNU General Public License along
  17 // with this library; see the file COPYING3.  If not see
  18 // <http://www.gnu.org/licenses/>.
  19
  20 // 27.6.1.2.2 arithmetic extractors
  21
  22 #include <sstream>
  23 #include <limits>
  24 #include <testsuite_hooks.h>
  25
  26 // DR 696.
  27 void test01()
  28 {
  29   using namespace std;
  30
  31   short s1 = 0;
  32   ostringstream oss1;
  33   oss1 << numeric_limits<short>::max();
  34   istringstream iss1(oss1.str());
  35   iss1 >> s1;
  36   VERIFY( s1 == numeric_limits<short>::max() );
  37   VERIFY( !iss1.fail() && iss1.eof() );
  38
  39   short s2 = 0;
  40   ostringstream oss2;
  41   oss2 << static_cast<long long>(numeric_limits<short>::max()) + 1;
  42   istringstream iss2(oss2.str());
  43   iss2 >> s2;
  44   VERIFY( s2 == numeric_limits<short>::max() );
  45   VERIFY( iss2.fail() && iss2.eof() );
  46
  47   short s3 = 0;
  48   ostringstream oss3;
  49   oss3 << numeric_limits<short>::min();
  50   istringstream iss3(oss3.str());
  51   iss3 >> s3;
  52   VERIFY( s3 == numeric_limits<short>::min() );
  53   VERIFY( !iss3.fail() && iss3.eof() );
  54
  55   short s4 = 0;
  56   ostringstream oss4;
  57   oss4 << static_cast<long long>(numeric_limits<short>::min()) - 1;
  58   istringstream iss4(oss4.str());
  59   iss4 >> s4;
  60   VERIFY( s4 == numeric_limits<short>::min() );
  61   VERIFY( iss4.fail() && iss4.eof() );
  62
  63   int i1 = 0;
  64   ostringstream oss5;
  65   oss5 << numeric_limits<int>::max();
  66   istringstream iss5(oss5.str());
  67   iss5 >> i1;
  68   VERIFY( i1 == numeric_limits<int>::max() );
  69   VERIFY( !iss5.fail() && iss5.eof() );
  70
  71   int i2 = 0;
  72   ostringstream oss6;
  73   oss6 << static_cast<long long>(numeric_limits<int>::max()) + 1;
  74   istringstream iss6(oss6.str());
  75   iss6 >> i2;
  76   VERIFY( i1 == numeric_limits<int>::max() );
  77   VERIFY( iss6.fail() && iss6.eof() );
  78
  79   int i3 = 0;
  80   ostringstream oss7;
  81   oss7 << numeric_limits<int>::min();
  82   istringstream iss7(oss7.str());
  83   iss7 >> i3;
  84   VERIFY( i3 == numeric_limits<int>::min() );
  85   VERIFY( !iss7.fail() && iss7.eof() );
  86
  87   int i4 = 0;
  88   ostringstream oss8;
  89   oss8 << static_cast<long long>(numeric_limits<int>::min()) - 1;
  90   istringstream iss8(oss8.str());
  91   iss8 >> i4;
  92   VERIFY( i4 == numeric_limits<int>::min() );
  93   VERIFY( iss8.fail() && iss8.eof() );
  94 }
  95
  96 int main()
  97 {
  98   test01();
  99   return 0;
 100 }