117             if let syn::Type::Path(ty) = ungroup(&field.ty) {  in with_bound()
118                 if let Some(Pair::Punctuated(t, _)) = ty.path.segments.pairs().next() {  in with_bound()
120                         self.associated_type_usage.push(ty);  in with_bound()
124             self.visit_type(&field.ty);  in with_bound()
148         fn visit_type(&mut self, ty: &'ast syn::Type) {  in with_bound()
149             match ty {  in with_bound()
150                 syn::Type::Array(ty) => self.visit_type(&ty.elem),  in with_bound()
151                 syn::Type::BareFn(ty) => {  in with_bound()
152                     for arg in &ty.inputs {  in with_bound()
153                         self.visit_type(&arg.ty);  in with_bound()
155                     self.visit_return_type(&ty.output);  in with_bound()
157                 syn::Type::Group(ty) => self.visit_type(&ty.elem),  in with_bound()
158                 syn::Type::ImplTrait(ty) => {  in with_bound()
159                     for bound in &ty.bounds {  in with_bound()
163                 syn::Type::Macro(ty) => self.visit_macro(&ty.mac),  in with_bound()
164                 syn::Type::Paren(ty) => self.visit_type(&ty.elem),  in with_bound()
165                 syn::Type::Path(ty) => {  in with_bound()
166                     if let Some(qself) = &ty.qself {  in with_bound()
167                         self.visit_type(&qself.ty);  in with_bound()
169                     self.visit_path(&ty.path);  in with_bound()
171                 syn::Type::Ptr(ty) => self.visit_type(&ty.elem),  in with_bound()
172                 syn::Type::Reference(ty) => self.visit_type(&ty.elem),  in with_bound()
173                 syn::Type::Slice(ty) => self.visit_type(&ty.elem),  in with_bound()
174                 syn::Type::TraitObject(ty) => {  in with_bound()
175                     for bound in &ty.bounds {  in with_bound()
179                 syn::Type::Tuple(ty) => {  in with_bound()
180                     for elem in &ty.elems {  in with_bound()
205                             syn::GenericArgument::Binding(arg) => self.visit_type(&arg.ty),  in with_bound()