err := &ast.Field{Type: ast.NewIdent("error")}
		l := gtype.Results.List
		if len(l) == 0 {
			l = []*ast.Field{err}
		} else {
			l = []*ast.Field{l[0], err}
		}
		t := new(ast.FuncType)
		*t = *gtype
		t.Results = &ast.FieldList{List: l}
		gtype = t
	}

	// Go func declaration.
	d := &ast.FuncDecl{
		Name: ast.NewIdent(n.Mangle),
		Type: gtype,
	}

		if s.Name != nil {
			if s.Name.Name == old {
				s.Name.Name = new
				fixed = true
			}
		} else {
			_, thisName := path.Split(importPath(s))
			if thisName == old {
				s.Name = ast.NewIdent(new)
				fixed = true
			}
		}
	}

	// Rename any top-level declarations.
	for _, d := range f.Decls {
		switch d := d.(type) {
		case *ast.FuncDecl:
			if d.Recv == nil && d.Name.Name == old {

		i := 0
		for _, filename := range filenames {
			f := pkg.Files[filename]
			i += copy(comments[i:], f.Comments)
		}
	}

	// TODO(gri) need to compute unresolved identifiers!
	return &File{doc, pos, NewIdent(pkg.Name), decls, minPos, maxPos, pkg.Scope, imports, nil, comments, ""}

func (*ChanType) exprNode()      {}

// ----------------------------------------------------------------------------
// Convenience functions for Idents

// NewIdent creates a new [Ident] without position.
// Useful for ASTs generated by code other than the Go parser.
func NewIdent(name string) *Ident { return &Ident{token.NoPos, name, nil} }

// IsExported reports whether name starts with an upper-case letter.

				// Similarly so for return values: ret, ret1, ret2, ...
				name := "arg"
				if isret {
					name = "ret"
				}
				if argnum > 0 {
					name += strconv.Itoa(argnum)
				}
				names = []*ast.Ident{ast.NewIdent(name)}
			}
			argnum += len(names)

			// Create variable for each name.
			for _, id := range names {
				name := id.Name
				for _, c := range cc {
					outer := name + c.outer
					v := asmVar{

			// or the result type in a return statement. Create a pseudo-expression for that operand
			// that makes sense when reported in error messages from infer, below.
			expr := ast.NewIdent(T.desc)
			expr.NamePos = x.Pos() // correct position
			args = []*operand{{mode: value, expr: expr, typ: T.sig}}
			reverse = true
		}

		// Rename type parameters to avoid problems with recursive instantiations.

		for i := len(list) - 1; i >= 0; i-- {
			if par := &list[i]; par.typ != nil {
				typ = par.typ
				if par.name == nil {
					errPos = typ.Pos()
					n := ast.NewIdent("_")
					n.NamePos = errPos // correct position
					par.name = n
				}
			} else if typ != nil {
				par.typ = typ
			} else {
				// par.typ == nil && typ == nil => we only have a par.name

		{"MapType.Key", Field, 0},
		{"MapType.Map", Field, 0},
		{"MapType.Value", Field, 0},
		{"MergeMode", Type, 0},
		{"MergePackageFiles", Func, 0},
		{"NewCommentMap", Func, 1},
		{"NewIdent", Func, 0},
		{"NewObj", Func, 0},
		{"NewPackage", Func, 0},
		{"NewScope", Func, 0},
		{"Node", Type, 0},
		{"NotNilFilter", Func, 0},
		{"ObjKind", Type, 0},
		{"Object", Type, 0},

pkg go/ast, func Inspect(Node, func(Node) bool)
pkg go/ast, func IsExported(string) bool
pkg go/ast, func MergePackageFiles(*Package, MergeMode) *File
pkg go/ast, func NewIdent(string) *Ident
pkg go/ast, func NewObj(ObjKind, string) *Object
pkg go/ast, func NewPackage(*token.FileSet, map[string]*File, Importer, *Scope) (*Package, error)
pkg go/ast, func NewScope(*Scope) *Scope