if r == nil {
				return nil
			}
			returns = append(returns, &ast.Field{
				Type: r,
			})
		}
		return &ast.FuncType{
			Params: &ast.FieldList{
				List: params,
			},
			Results: &ast.FieldList{
				List: returns,
			},
		}
	case interface{ Obj() *types.TypeName }: // *types.{Alias,Named,TypeParam}
		if t.Obj().Pkg() == nil {
			return ast.NewIdent(t.Obj().Name())

	case *Ident:
		return t
	case *SelectorExpr:
		if _, ok := t.X.(*Ident); ok {
			return t.Sel
		}
	case *StarExpr:
		return fieldName(t.X)
	}
	return nil
}

func filterFieldList(fields *FieldList, filter Filter, export bool) (removedFields bool) {
	if fields == nil {
		return false
	}
	list := fields.List
	j := 0
	for _, f := range list {
		keepField := false
		if len(f.Names) == 0 {

// inadvertently copy a lock, by checking whether
// its receiver, parameters, or return values
// are locks.
func checkCopyLocksFunc(pass *analysis.Pass, name string, recv *ast.FieldList, typ *ast.FuncType) {
	if recv != nil && len(recv.List) > 0 {
		expr := recv.List[0].Type
		if path := lockPath(pass.Pkg, pass.TypesInfo.Types[expr].Type, nil); path != nil {

	r.order++
}

// fields returns a struct's fields or an interface's methods.
func fields(typ ast.Expr) (list []*ast.Field, isStruct bool) {
	var fields *ast.FieldList
	switch t := typ.(type) {
	case *ast.StructType:
		fields = t.Fields
		isStruct = true
	case *ast.InterfaceType:
		fields = t.Methods
	}
	if fields != nil {
		list = fields.List
	}
	return

		check.error(tdecl.Type, MisplacedTypeParam, "cannot use a type parameter as RHS in type declaration")
		named.underlying = Typ[Invalid]
	}
}

func (check *Checker) collectTypeParams(dst **TypeParamList, list *ast.FieldList) {
	var tparams []*TypeParam
	// Declare type parameters up-front, with empty interface as type bound.
	// The scope of type parameters starts at the beginning of the type parameter

			// as the key should be resolved by the type of the
			// composite literal.
			ast.Inspect(e.Value, inspectFunc)
			return false
		}
		return true
	}

	inspectFieldList := func(fl *ast.FieldList) {
		if fl != nil {
			for _, f := range fl.List {
				ast.Inspect(f.Type, inspectFunc)
			}
		}
	}

	// Find the decls immediately referenced by body.
	ast.Inspect(body, inspectFunc)