dawn-cmake/test/shader_io/fragment_input_locations_struct.wgsl

struct FragmentInputs {
  [[location(0), interpolate(flat)]] loc0 : i32;
  [[location(1), interpolate(flat)]] loc1 : u32;
  [[location(2)]] loc2 : f32;
  [[location(3)]] loc3 : vec4<f32>;
};

[[stage(fragment)]]
fn main(inputs : FragmentInputs) {
  let i : i32 = inputs.loc0;
  let u : u32 = inputs.loc1;
  let f : f32 = inputs.loc2;
  let v : vec4<f32> = inputs.loc3;
}