struct VertexInputs { [[builtin(vertex_index)]] vertex_index : u32; [[builtin(instance_index)]] instance_index : u32; }; [[stage(vertex)]] fn main(inputs : VertexInputs) -> [[builtin(position)]] vec4<f32> { let foo : u32 = (inputs.vertex_index + inputs.instance_index); return vec4<f32>(); }