p.print("BadDecl")
	case *ast.GenDecl:
		p.genDecl(d)
	case *ast.FuncDecl:
		p.funcDecl(d)
	default:
		panic("unreachable")
	}
}

// ----------------------------------------------------------------------------
// Files

func declToken(decl ast.Decl) (tok token.Token) {
	tok = token.ILLEGAL
	switch d := decl.(type) {
	case *ast.GenDecl:
		tok = d.Tok
	case *ast.FuncDecl:

	p.declare(spec, p.topScope, ast.Var, idents...)

	return spec
}

func (p *parser) parseGenDecl(keyword token.Token, f parseSpecFunction) *ast.GenDecl {
	if p.trace {
		defer un(trace(p, "GenDecl("+keyword.String()+")"))
	}

	doc := p.leadComment
	pos := p.expect(keyword)
	var lparen, rparen token.Pos
	var list []ast.Spec
	if p.tok == token.LPAREN {

		return x.Op == token.TILDE
	case *ast.ParenExpr:
		return isTypeElem(x.X)
	}
	return false
}

func (p *parser) parseGenDecl(keyword token.Token, f parseSpecFunction) *ast.GenDecl {
	if p.trace {
		defer un(trace(p, "GenDecl("+keyword.String()+")"))
	}

	doc := p.leadComment
	pos := p.expect(keyword)
	var lparen, rparen token.Pos
	var list []ast.Spec
	if p.tok == token.LPAREN {

	if err != nil {
		t.Fatal(err)
	}

	// map import paths to importDecl
	imports := make(map[string]*ast.ImportSpec)
	for _, s := range f.Decls[0].(*ast.GenDecl).Specs {
		if imp, _ := s.(*ast.ImportSpec); imp != nil {
			imports[imp.Path.Value] = imp
		}
	}

	for _, test := range tests {
		imp := imports[test.path]
		if imp == nil {

				r.Align = p.PtrSize
			}
			return r
		}
		// Look up the type in the top level declarations.
		// TODO: Handle types defined within a function.
		for _, d := range p.Decl {
			gd, ok := d.(*ast.GenDecl)
			if !ok || gd.Tok != token.TYPE {
				continue
			}
			for _, spec := range gd.Specs {
				ts, ok := spec.(*ast.TypeSpec)
				if !ok {
					continue
				}
				if ts.Name.Name == t.Name {

	case *ast.FuncType, *ast.InterfaceType, *ast.MapType, *ast.ChanType:
		return true
	case *ast.Ident:
		// TODO: Handle types defined within function.
		for _, d := range p.Decl {
			gd, ok := d.(*ast.GenDecl)
			if !ok || gd.Tok != token.TYPE {
				continue
			}
			for _, spec := range gd.Specs {
				ts, ok := spec.(*ast.TypeSpec)
				if !ok {
					continue
				}
				if ts.Name.Name == t.Name {