p.expect(token.DEFAULT)
	}

	colon := p.expect(token.COLON)
	p.openScope()
	body := p.parseStmtList()
	p.closeScope()

	return &ast.CaseClause{pos, list, colon, body}
}

func isExprSwitch(s ast.Stmt) bool {
	if s == nil {
		return true
	}
	if e, ok := s.(*ast.ExprStmt); ok {
		if a, ok := e.X.(*ast.TypeAssertExpr); ok {
			return a.Type != nil // regular type assertion
		}