//
// The node type must be *[ast.File], *[printer.CommentedNode], [][ast.Decl],
// [][ast.Stmt], or assignment-compatible to [ast.Expr], [ast.Decl], [ast.Spec],
// or [ast.Stmt]. Node does not modify node. Imports are not sorted for
// nodes representing partial source files (for instance, if the node is
// not an *[ast.File] or a *[printer.CommentedNode] not wrapping an *[ast.File]).
//

		if len(n.Comments) > 0 {
			return n.Comments[len(n.Comments)-1]
		}
	}
	return nil
}

func (p *printer) printNode(node any) error {
	// unpack *CommentedNode, if any
	var comments []*ast.CommentGroup
	if cnode, ok := node.(*CommentedNode); ok {
		node = cnode.Node
		comments = cnode.Comments
	}

	if comments != nil {
		// commented node - restrict comment list to relevant range

		t.Fatal(err)
	}

	var buf bytes.Buffer

	err = Fprint(&buf, fset, &CommentedNode{Node: f.Decls[0], Comments: f.Comments})
	if err != nil {
		t.Fatal(err)
	}

	if buf.String() != foo {
		t.Errorf("got %q, want %q", buf.String(), foo)
	}

	buf.Reset()

	err = Fprint(&buf, fset, &CommentedNode{Node: f.Decls[1], Comments: f.Comments})
	if err != nil {
		t.Fatal(err)
	}

func (pkg *Package) emit(comment string, node ast.Node) {
	if node != nil {
		var arg any = node
		if showSrc {
			// Need an extra little dance to get internal comments to appear.
			arg = &printer.CommentedNode{
				Node:     node,
				Comments: pkg.file.Comments,
			}
		}
		err := format.Node(&pkg.buf, pkg.fs, arg)
		if err != nil {
			log.Fatal(err)
		}
		if comment != "" && !showSrc {

		{"SkipObjectResolution", Const, 17},
		{"SpuriousErrors", Const, 0},
		{"Trace", Const, 0},
	},
	"go/printer": {
		{"(*Config).Fprint", Method, 0},
		{"CommentedNode", Type, 0},
		{"CommentedNode.Comments", Field, 0},
		{"CommentedNode.Node", Field, 0},
		{"Config", Type, 0},
		{"Config.Indent", Field, 1},
		{"Config.Mode", Field, 0},
		{"Config.Tabwidth", Field, 0},
		{"Fprint", Func, 0},

pkg go/printer, method (*Config) Fprint(io.Writer, *token.FileSet, interface{}) error
pkg go/printer, type CommentedNode struct
pkg go/printer, type CommentedNode struct, Comments []*ast.CommentGroup
pkg go/printer, type CommentedNode struct, Node interface{}
pkg go/printer, type Config struct
pkg go/printer, type Config struct, Mode Mode
pkg go/printer, type Config struct, Tabwidth int