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: code.go
    path of file: ./repos/gitkube/vendor/golang.org/x/tools/present
    
    the code of the file until where you have to start completion: // Copyright 2012 The Go Authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.

package present

import (
	"bufio"
	"bytes"
	"fmt"
	"html/template"
	"path/filepath"
	"regexp"
	"strconv"
	"strings"
)

// PlayEnabled specifies whether runnable playground snippets should be
// displayed in the present user interface.
var PlayEnabled = false

// TODO(adg): replace the PlayEnabled flag with something less spaghetti-like.
// Instead this will probably be determined by a template execution Context
// va
    
func parseArgs(name string, line int, args []string) (res []interface{}, err error) {
	res = make([]interface{}, len(args))
	for i, v := range args {
		if len(v) == 0 {
			return nil, fmt.Errorf("%s:%d bad code argument %q", name, line, v)
		}
		switch v[0] {
		case '0', '1', '2', '3', '4', '5', '6', '7', '8', '9':
			n, err := strconv.Atoi(v)
			if err != nil {
				return nil, fmt.Errorf("%s:%d bad code argument %q", name, line, v)
			}
			res[i] = n
		case '/':
			if len(v) < 2 || v[len(v)-1] != '/' {
				return nil, fmt.Errorf("%s:%d bad code argument %q", name, line, v)
			}
			res[i] = v
		case '$':
			res[i] = "$"
		case '_':
			if len(v) == 1 {
				// Do nothing; "_" indicates an intentionally empty parameter.
				break
			}
			fallthrough
		default:
			return nil, fmt.Errorf("%s:%d bad code argument %q", name, line, v)
		}
	}
	return
}