How to Implement a Go Function Equivalent to C's `getchar()`?

Go Function Equivalent to C's getchar

getchar(), a function in C, allows users to read a single character from the console. This functionality is desirable for applications like console completions. In Go, a similar function can be implemented using the bufio package.

Go getchar() Implementation

package main

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

func main() {
    reader := bufio.NewReader(os.Stdin)
    input, _ := reader.ReadString('\n')
    fmt.Printf("Input Character: %v", string([]byte(input)[0]))
}

Limitations of getchar()

However, in the case of tab completion, getchar() may not be an ideal solution. Unlike getchar(), which requires pressing Enter to capture the input, functions like ncurses' getch(), readline, or jLine are designed to capture a single keystroke without the need for Enter.

Alternatives to getchar() for Tab Completion

For tab completion, consider these alternative solutions:

• Use ncurses/readline bindings: For example, libraries like https://code.google.com/p/goncurses/ provide ncurses bindings.
• Implement your own solution: Utilize resources like https://play.golang.org/p/plwBIIYiqG as a starting point.
• Call external commands: Execute commands like stty or jLine using os.Exec.

References:

• 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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