f.NamePos = make(map[*Name]token.Pos)

	// In ast1, find the import "C" line and get any extra C preamble.
	sawC := false
	for _, decl := range ast1.Decls {
		switch decl := decl.(type) {
		case *ast.GenDecl:
			for _, spec := range decl.Specs {
				s, ok := spec.(*ast.ImportSpec)
				if !ok || s.Path.Value != `"C"` {
					continue
				}
				sawC = true
				if s.Name != nil {

	if fields != nil {
		for _, field := range fields.List {
			for _, name := range field.Names {
				if f(name.Name) {
					return true
				}
			}
		}
	}
	return false
}

func matchDecl(d *ast.GenDecl, f Filter) bool {
	for _, d := range d.Specs {
		switch v := d.(type) {
		case *ast.ValueSpec:
			for _, name := range v.Names {
				if f(name.Name) {
					return true
				}
			}
		case *ast.TypeSpec:

// predeclared) type. The namedType for a type name is always found via
// reader.lookupType.
type namedType struct {
	doc  string       // doc comment for type
	name string       // type name
	decl *ast.GenDecl // nil if declaration hasn't been seen yet

	isEmbedded bool        // true if this type is embedded
	isStruct   bool        // true if this type is a struct
	embedded   embeddedSet // true if the embedded type is a pointer

	}
	_, err = conf.Check("types", fset, []*ast.File{file}, info)
	if err != nil {
		log.Fatalf("Check failed: %s", err)
	}
	for _, decl := range file.Decls {
		decl, ok := decl.(*ast.GenDecl)
		if !ok || decl.Tok != token.CONST {
			continue
		}
		for _, spec := range decl.Specs {
			spec, ok := spec.(*ast.ValueSpec)
			if !ok || len(spec.Names) == 0 {
				continue
			}

	}
)

// Pos and End implementations for declaration nodes.

func (d *BadDecl) Pos() token.Pos  { return d.From }
func (d *GenDecl) Pos() token.Pos  { return d.TokPos }
func (d *FuncDecl) Pos() token.Pos { return d.Type.Pos() }

func (d *BadDecl) End() token.Pos { return d.To }
func (d *GenDecl) End() token.Pos {
	if d.Rparen.IsValid() {
		return d.Rparen + 1
	}
	return d.Specs[0].End()
}

			importMap[path] = imported(info, spec)
		}

		// Add special dot-import declaration:
		//    import . "·this·"
		var decls []ast.Decl
		decls = append(decls, &ast.GenDecl{
			Tok: token.IMPORT,
			Specs: []ast.Spec{
				&ast.ImportSpec{
					Name: &ast.Ident{Name: "."},
					Path: &ast.BasicLit{
						Kind:  token.STRING,
						Value: strconv.Quote(thispkg),
					},

	// except in the definition (handled at end of function).
	refName := make(map[*ast.Expr]*Name)
	for _, r := range f.Ref {
		refName[r.Expr] = r.Name
	}
	for _, d := range f.AST.Decls {
		d, ok := d.(*ast.GenDecl)
		if !ok || d.Tok != token.TYPE {
			continue
		}
		for _, s := range d.Specs {
			s := s.(*ast.TypeSpec)
			n := refName[&s.Type]
			if n != nil && n.Mangle != "" {
				override[n.Mangle] = s.Name.Name
			}

				log.Fatal("unexpected function body")
			}
			declName := pkg + "." + decl.Name.Name
			decls[declName] = true
			fmt.Fprintf(w, "{%q, 1},\n", declName) // functions are ABIInternal (1)
		case *ast.GenDecl:
			if decl.Tok == token.IMPORT {
				continue
			}
			if decl.Tok != token.VAR {
				log.Fatal("unhandled declaration kind", decl.Tok)
			}
			for _, spec := range decl.Specs {
				spec := spec.(*ast.ValueSpec)

		ast.SortImports(fset, file)
	}

	return format(fset, file, sourceAdj, indentAdj, src, config)
}

func hasUnsortedImports(file *ast.File) bool {
	for _, d := range file.Decls {
		d, ok := d.(*ast.GenDecl)
		if !ok || d.Tok != token.IMPORT {
			// Not an import declaration, so we're done.
			// Imports are always first.
			return false
		}
		if d.Lparen.IsValid() {

		Uses:  make(map[*ast.Ident]Object),
	}
	_, err = conf.Check("types", fset, []*ast.File{file}, info)
	if err != nil {
		t.Fatal(err)
	}
	for _, decl := range file.Decls {
		decl, ok := decl.(*ast.GenDecl)
		if !ok || decl.Tok != token.CONST {
			continue
		}
		for _, spec := range decl.Specs {
			spec, ok := spec.(*ast.ValueSpec)
			if !ok || len(spec.Names) == 0 {
				continue
			}