libcxx/test/std/numerics/complex.number/cmplx.over/proj.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>    complex<T>           proj(const complex<T>&);
  12 //                      complex<long double> proj(long double);
  13 //                      complex<double>      proj(double);
  14 // template<Integral T> complex<double>      proj(T);
  15 //                      complex<float>       proj(float);
  16
  17 #include <complex>
  18 #include <type_traits>
  19 #include <cassert>
  20
  21 #include "test_macros.h"
  22 #include "../cases.h"
  23
  24 template <class T>
  25 void
  26 test(T x, typename std::enable_if<std::is_integral<T>::value>::type* = 0)
  27 {
  28     static_assert((std::is_same<decltype(std::proj(x)), std::complex<double> >::value), "");
  29     assert(std::proj(x) == proj(std::complex<double>(x, 0)));
  30 }
  31
  32 template <class T>
  33 void
  34 test(T x, typename std::enable_if<std::is_floating_point<T>::value>::type* = 0)
  35 {
  36     static_assert((std::is_same<decltype(std::proj(x)), std::complex<T> >::value), "");
  37     assert(std::proj(x) == proj(std::complex<T>(x, 0)));
  38 }
  39
  40 template <class T>
  41 void
  42 test(T x, typename std::enable_if<!std::is_integral<T>::value &&
  43                                   !std::is_floating_point<T>::value>::type* = 0)
  44 {
  45     static_assert((std::is_same<decltype(std::proj(x)), std::complex<T> >::value), "");
  46     assert(std::proj(x) == proj(std::complex<T>(x, 0)));
  47 }
  48
  49 template <class T>
  50 void
  51 test()
  52 {
  53     test<T>(0);
  54     test<T>(1);
  55     test<T>(10);
  56 }
  57
  58 int main(int, char**)
  59 {
  60     test<float>();
  61     test<double>();
  62     test<long double>();
  63     test<int>();
  64     test<unsigned>();
  65     test<long long>();
  66
  67   return 0;
  68 }