libstdc++-v3/testsuite/26_numerics/complex/cons/constexpr_primary.cc

   1 // { dg-do compile { target c++11 } }
   2
   3 // Copyright (C) 2010-2020 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 #include <complex>
  21
  22 // User defined type, so that the primary std::complex template is used.
  23 namespace numext
  24 {
  25   struct ldld_base
  26   {
  27     long double one;
  28     long double two;
  29   };
  30
  31   struct ldld_lit : public ldld_base
  32   { };
  33
  34   struct ldld_nonlit : public ldld_base
  35   {
  36     ~ldld_nonlit() { }
  37   };
  38
  39   bool
  40   operator<(const ldld_base __a, const ldld_base __b)
  41   { return __a.one < __b.one && __a.two < __b.two; }
  42
  43   bool
  44   operator==(const ldld_base __a, const ldld_base __b)
  45   { return __a.one == __b.one && __a.two == __b.two; }
  46
  47   ldld_base
  48   operator+=(const ldld_base __a, const ldld_base __b)
  49   { return ldld_base({ __a.one + __b.one, __a.two + __b.two}); }
  50
  51   ldld_base
  52   operator-=(const ldld_base __a, const ldld_base __b)
  53   { return ldld_base({ __a.one - __b.one, __a.two - __b.two}); }
  54
  55   ldld_base
  56   operator*=(const ldld_base __a, const ldld_base __b)
  57   { return ldld_base({ __a.one * __b.one, __a.two * __b.two}); }
  58
  59   ldld_base
  60   operator/=(const ldld_base __a, const ldld_base __b)
  61   { return ldld_base({ __a.one / __b.one, __a.two / __b.two}); }
  62
  63 }
  64
  65 constexpr std::complex<numext::ldld_lit> lit; // ok
  66 // constexpr std::complex<numext::ldld_nonlit> nonlit; // error