void $function() {}

float4 main(float2 xy) {
    const half $one = 1;
    $function();
    return $hsl_to_rgb(half3(0), $one);
}

/*%%*
name '$function' is reserved
name '$one' is reserved
name '$function' is reserved
name '$hsl_to_rgb' is reserved
name '$one' is reserved
*%%*/