libcxx/test/std/numerics/complex.number/complex.ops/stream_input.pass.cpp

   1 //===----------------------------------------------------------------------===//
   2 //
   3 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
   4 // See https://llvm.org/LICENSE.txt for license information.
   5 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
   6 //
   7 //===----------------------------------------------------------------------===//
   8
   9 // <complex>
  10
  11 // template<class T, class charT, class traits>
  12 //   basic_istream<charT, traits>&
  13 //   operator>>(basic_istream<charT, traits>& is, complex<T>& x);
  14
  15 #include <complex>
  16 #include <sstream>
  17 #include <cassert>
  18
  19 #include "test_macros.h"
  20
  21 int main(int, char**)
  22 {
  23     {
  24         std::istringstream is("5");
  25         std::complex<double> c;
  26         is >> c;
  27         assert(c == std::complex<double>(5, 0));
  28         assert(is.eof());
  29     }
  30     {
  31         std::istringstream is(" 5 ");
  32         std::complex<double> c;
  33         is >> c;
  34         assert(c == std::complex<double>(5, 0));
  35         assert(is.good());
  36     }
  37     {
  38         std::istringstream is(" 5, ");
  39         std::complex<double> c;
  40         is >> c;
  41         assert(c == std::complex<double>(5, 0));
  42         assert(is.good());
  43     }
  44     {
  45         std::istringstream is(" , 5, ");
  46         std::complex<double> c;
  47         is >> c;
  48         assert(c == std::complex<double>(0, 0));
  49         assert(is.fail());
  50     }
  51     {
  52         std::istringstream is("5.5 ");
  53         std::complex<double> c;
  54         is >> c;
  55         assert(c == std::complex<double>(5.5, 0));
  56         assert(is.good());
  57     }
  58     {
  59         std::istringstream is(" ( 5.5 ) ");
  60         std::complex<double> c;
  61         is >> c;
  62         assert(c == std::complex<double>(5.5, 0));
  63         assert(is.good());
  64     }
  65     {
  66         std::istringstream is("  5.5)");
  67         std::complex<double> c;
  68         is >> c;
  69         assert(c == std::complex<double>(5.5, 0));
  70         assert(is.good());
  71     }
  72     {
  73         std::istringstream is("(5.5 ");
  74         std::complex<double> c;
  75         is >> c;
  76         assert(c == std::complex<double>(0, 0));
  77         assert(is.fail());
  78     }
  79     {
  80         std::istringstream is("(5.5,");
  81         std::complex<double> c;
  82         is >> c;
  83         assert(c == std::complex<double>(0, 0));
  84         assert(is.fail());
  85     }
  86     {
  87         std::istringstream is("( -5.5 , -6.5 )");
  88         std::complex<double> c;
  89         is >> c;
  90         assert(c == std::complex<double>(-5.5, -6.5));
  91         assert(!is.eof());
  92     }
  93     {
  94         std::istringstream is("(-5.5,-6.5)");
  95         std::complex<double> c;
  96         is >> c;
  97         assert(c == std::complex<double>(-5.5, -6.5));
  98         assert(!is.eof());
  99     }
 100
 101   return 0;
 102 }