You are an expert in writing code in many different languages. Your goal is to perform code completion for the following code, keeping in mind the rest of the code and the file meta data.
    Metadata details:
    filename: repl.go
    path of file: ./repos/gomacro/fast
    
    the code of the file until where you have to start completion: /*
 * gomacro - A Go interpreter with Lisp-like macros
 *
 * Copyright (C) 2018-2019 Massimiliano Ghilardi
 *
 *     This Source Code Form is subject to the terms of the Mozilla Public
 *     License, v. 2.0. If a copy of the MPL was not distributed with this
 *     file, You can obtain one at http://mozilla.org/MPL/2.0/.
 *
 *
 * repl.go
 *
 *  Created on: Apr 28, 2018
 *      Author: Massimiliano Ghilardi
 */

package fast

import (
	"bufio"
	"fmt"
	"go/ast"
	"go/token"
	"os"
	"runtime/debug"
	"sort"
	"strings"
	"time"

	"g
    
func (c *Comp) completeWords(node interface{}, words []string) []string {
	i, n := 0, len(words)
	for i+1 < n {
		switch obj := node.(type) {
		case *Bind:
			if obj.Const() {
				if imp, ok := obj.Value.(*Import); ok {
					// complete on imported package contents
					node = imp
					continue
				}
			}
			// complete on symbol type
			node = obj.Type
			continue
		case *Import:
			if i != 0 {
				break
			} else if bind := obj.Binds[words[i]]; bind != nil {
				// complete on imported package binds
				node = bind
				i++
				continue
			} else if typ := obj.Types[words[i]]; typ != nil {
				// complete on imported package types
				node = typ
				i++
				continue
			}
		case xr.Type:
			field, fieldok, _, _, err := c.TryLookupFieldOrMethod(obj, words[i])
			if err != nil {
				break
			} else if fieldok {
				node = field.Type
				i++
				continue
			}
			// {type,value}.method.anything will never compile
		}
		return nil
	}
	return c.completeLastWord(node, words[i])
}