clang/test/SemaCXX/complex-conversion.cpp

   1 // RUN: %clang_cc1 -fsyntax-only -verify %s
   2
   3 template<typename T> void take(T);
   4
   5 void func(float Real, _Complex float Complex) {
   6   Real += Complex; // expected-error {{assigning to 'float' from incompatible type '_Complex float'}}
   7   Real += (float)Complex;
   8
   9   Real = Complex; // expected-error {{implicit conversion from '_Complex float' to 'float' is not permitted in C++}}
  10   Real = (float)Complex;
  11
  12   take<float>(Complex); // expected-error {{implicit conversion from '_Complex float' to 'float' is not permitted in C++}}
  13   take<double>(1.0i); // expected-error {{implicit conversion from '_Complex double' to 'double' is not permitted in C++}}
  14   take<_Complex float>(Complex);
  15
  16   // Conversion to bool doesn't actually discard the imaginary part.
  17   take<bool>(Complex);
  18
  19   using B = _Complex double;
  20   B c;
  21   c *= double();
  22 }