dawn-cmake/test/shader_io/vertex_output_builtins_struct.wgsl

struct VertexOutputs {
  [[builtin(position)]] position : vec4<f32>;
};

[[stage(vertex)]]
fn main() -> VertexOutputs {
  return VertexOutputs(vec4<f32>(1.0, 2.0, 3.0, 4.0));
}