! RUN: %python %S/test_errors.py %s %flang_fc1
module m
  interface operator(-)
    !ERROR: OPERATOR(-) function 'f1' conflicts with intrinsic operator
    function f1(x)
      real, intent(in) :: x
    end
    !ERROR: OPERATOR(-) function 'f2' conflicts with intrinsic operator
    attributes(device) function f2(x)
      real, intent(in), device :: x(:)
    end
    function f3(x) ! ok
      real, intent(in), device :: x(:,:)
    end
    !ERROR: OPERATOR(-) function 'f4' conflicts with intrinsic operator
    attributes(device) function f4(x)
      real, intent(in) :: x(:,:,:)
    end
    !ERROR: OPERATOR(-) function 'f5' conflicts with intrinsic operator
    function f5(x)
      real, intent(in), unified :: x(:,:,:,:)
    end
    !ERROR: OPERATOR(-) function 'f6' conflicts with intrinsic operator
    attributes(device) function f6(x)
      real, intent(in), managed :: x(:,:,:,:,:)
    end
  end interface
  interface operator(*)
    !ERROR: OPERATOR(*) function 'f11' conflicts with intrinsic operator
    function f11(x, y)
      real, intent(in) :: x, y
    end
    !ERROR: OPERATOR(*) function 'f12' conflicts with intrinsic operator
    attributes(device) function f12(x, y)
      real, intent(in), device :: x, y(:)
    end
    !ERROR: OPERATOR(*) function 'f13' conflicts with intrinsic operator
    attributes(device) function f13(x, y)
      real, intent(in) :: x(:), y
    end
    function f14a(x, y) ! ok
      real, intent(in), device :: x(:)
      real, intent(in) :: y(:)
    end
    function f14b(x, y) ! ok
      real, intent(in) :: x
      real, intent(in), device :: y(:,:)
    end
    !ERROR: OPERATOR(*) function 'f15' conflicts with intrinsic operator
    function f15(x, y)
      real, intent(in) :: x(:,:)
      real, intent(in), unified :: y
    end
    !ERROR: OPERATOR(*) function 'f16' conflicts with intrinsic operator
    attributes(device) function f16(x, y)
      real, intent(in), device :: x(:,:)
      real, intent(in), managed :: y(:,:)
    end
  end interface
  interface assignment(=)
    !ERROR: Defined assignment subroutine 's1' conflicts with intrinsic assignment
    subroutine s1(x, y)
      real, intent(in out) :: x
      real, intent(in) :: y
    end
    !ERROR: Defined assignment subroutine 's2' conflicts with intrinsic assignment
    attributes(device) subroutine s2(x, y)
      real, intent(in out), device :: x(:)
      real, intent(in), device :: y
    end
    !ERROR: Defined assignment subroutine 's3' conflicts with intrinsic assignment
    attributes(device) subroutine s3(x, y)
      real, intent(in out) :: x(:)
      real, intent(in) :: y(:)
    end
    subroutine s4a(x, y) ! ok
      real, intent(in out), device :: x(:,:)
      real, intent(in) :: y
    end
    subroutine s4b(x, y) ! ok
      real, intent(in out) :: x(:,:)
      real, intent(in), device :: y(:,:)
    end
    !ERROR: Defined assignment subroutine 's5' conflicts with intrinsic assignment
    subroutine s5(x, y)
      real, intent(in out) :: x(:,:,:)
      real, intent(in), unified :: y
    end
    !ERROR: Defined assignment subroutine 's6' conflicts with intrinsic assignment
    attributes(device) subroutine s6(x, y)
      real, intent(in out), device :: x(:,:,:)
      real, intent(in), managed :: y(:,:,:)
    end
  end interface
end