struct FragmentInputs { @builtin(position) position : vec4<f32>, @builtin(front_facing) front_facing : bool, @builtin(sample_index) sample_index : u32, @builtin(sample_mask) sample_mask : u32, }; @fragment fn main(inputs : FragmentInputs) { if (inputs.front_facing) { let foo : vec4<f32> = inputs.position; let bar : u32 = inputs.sample_index + inputs.sample_mask; } }