类似于 getchar 的功能 [英] function similar to getchar

问题描述

是否有类似于 C 的 getchar 的 Go 函数能够处理控制台中的 Tab 按下?我想在我的控制台应用程序中进行某种完成.

Is there a Go function similar to C's getchar able to handle tab press in console? I want to make some sort of completion in my console app.

推荐答案

C 的 getchar() 示例:

#include <stdio.h>
void main()
{
    char ch;
    ch = getchar();
    printf("Input Char Is :%c",ch);
}

等效:

package main

import (
    "bufio"
    "fmt"
    "os"
)

func main() {

    reader := bufio.NewReader(os.Stdin)
    input, _ := reader.ReadString('
')

    fmt.Printf("Input Char Is : %v", string([]byte(input)[0]))

    // fmt.Printf("You entered: %v", []byte(input))
}

最后一行注释只是表明当您按下 tab 时，第一个元素是 U+0009('CHARACTER TABULATION').

The last commented line just shows that when you press tab the first element is U+0009 ('CHARACTER TABULATION').

但是对于您的需要(检测选项卡)，C 的 getchar() 不适合，因为它需要用户按回车键.你需要的是@miku提到的ncurses的getch()/readline/jLine.有了这些，您实际上是在等待一次击键.

However for your needs (detecting tab) C's getchar() is not suitable as it requires the user to hit enter. What you need is something like ncurses' getch()/ readline/ jLine as mentioned by @miku. With these, you actually wait for a single keystroke.

所以你有多种选择:

1. 使用 ncurses/readline 绑定，例如 https://code.google.com/p/goncurses/ 或类似 https://github.com/nsf/termbox

1. Use ncurses / readline binding, for example https://code.google.com/p/goncurses/ or equivalent like https://github.com/nsf/termbox

自行滚动，请参阅 http://play.golang.org/p/plwBIIYiqG 为起点

Roll your own see http://play.golang.org/p/plwBIIYiqG for starting point

使用 os.Exec 来运行 stty 或 jLine.

use os.Exec to run stty or jLine.

参考:

https://groups.google.com/forum/?fromgroups=#!topic/golang-nuts/zhBE5MH4n-Q

https://groups.google.com/forum/?fromgroups=#!topic/golang-nuts/S9AO_kHktiY

https://groups.google.com/forum/?fromgroups=#!topic/golang-nuts/icMfYF8wJCk

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