Continuation line not supported with cuf or OpenACC conditional compilation line

[clementval]

Using continuation line in a cuf or OpenACC conditional compilation line will trigger a bad character error.

!@cuf attributes(device) &
function rgbMinusRgb(rgb1, rgb2) result(res)
  type(rgb), intent(in) :: rgb1, rgb2
  real(4), intent(out) :: res(3)
  res = rgb1%v - rgb2%v
end function rgbMinusRgb

$ bbc -fcuda example.cuf -o -
./bin/bbc: could not scan example.cuf
./example.cuf:1:26: error: bad character ('&') in Fortran token
  !@cuf attributes(device) &

[llvmbot]

@llvm/issue-subscribers-flang-frontend

Author: Valentin Clement (バレンタイン クレメン) (clementval)

Using continuation line in a cuf or OpenACC conditional compilation line will trigger a `bad character` error.

!@<!-- -->cuf attributes(device) &amp;
function rgbMinusRgb(rgb1, rgb2) result(res)
  type(rgb), intent(in) :: rgb1, rgb2
  real(4), intent(out) :: res(3)
  res = rgb1%v - rgb2%v
end function rgbMinusRgb

$ bbc -fcuda example.cuf -o -
./bin/bbc: could not scan example.cuf
./example.cuf:1:26: error: bad character ('&') in Fortran token
  !@<!-- -->cuf attributes(device) &amp;