struct In {
  @location(0)
  none : f32,
  @location(1) @interpolate(flat)
  flat : f32,
  @location(2) @interpolate(perspective, center)
  perspective_center : f32,
  @location(3) @interpolate(perspective, centroid)
  perspective_centroid : f32,
  @location(4) @interpolate(perspective, sample)
  perspective_sample : f32,
  @location(5) @interpolate(linear, center)
  linear_center : f32,
  @location(6) @interpolate(linear, centroid)
  linear_centroid : f32,
  @location(7) @interpolate(linear, sample)
  linear_sample : f32,
}

@stage(fragment)
fn main(in : In) {
}