don't generate unused polymorphic builders

The removed builders aren't publicly exported and aren't used internally

generator/src/main.rs

@@ -1463,14 +1463,36 @@ impl Parser {
  struct_meta.insert(name, self.compute_meta(name, s));
  }
 
+ let polymorphic_whitelist = [
+ "XrCompositionLayerBaseHeader",
+ "XrCompositionLayerProjection",
+ "XrCompositionLayerQuad",
+ "XrCompositionLayerCylinderKHR",
+ "XrCompositionLayerCubeKHR",
+ "XrCompositionLayerEquirectKHR",
+ "XrHapticBaseHeader",
+ "XrHapticVibration",
+ "XrHapticPcmVibrationFB",
+ ]
+ .iter()
+ .cloned()
+ .collect::<HashSet<&str>>();
  let polymorphic_builders = self.base_headers.iter().filter_map(|(name, children)| {
- if name == "XrSwapchainImageBaseHeader"
- || name == "XrEventDataBaseHeader"
- || name == "XrLoaderInitInfoBaseHeaderKHR"
- {
- return None;
+ if polymorphic_whitelist.contains(&name[..]) {
+ let children = children
+ .iter()
+ .filter(|name| polymorphic_whitelist.contains(&name[..]))
+ .cloned()
+ .collect::<Vec<_>>();
+ Some(self.generate_polymorphic_builders(
+ &struct_meta,
+ &simple_structs,
+ name,
+ &children,
+ ))
+ } else {
+ None
  }
- Some(self.generate_polymorphic_builders(&struct_meta, &simple_structs, name, children))
  });
 
  let whitelist = [
@@ -1663,10 +1685,6 @@ impl Parser {
 
  let (type_params, type_args, marker, marker_init) = base_meta.type_params();
  let builders = children.iter().map(|name| {
- if name == "XrCompositionLayerPassthroughHTC" {
- // XrCompositionLayerPassthroughHTC has problems with its setters so we skip for now.
- return quote! {};
- }
  let ident = xr_ty_name(name);
  let s = self.structs.get(name).unwrap();
  let conds = conditions(name, s.extension.as_ref().map(|x| &x[..]));