为什么在使用lein run按下ENTER键(好像是挂起)后，读行不返回，但与lein repl一起工作?

问题描述

眼前的问题是，当我使用lein run运行程序时，它进入了(read-line)部分，而我走不开了，这意味着:读取行永不返回.

以下是相关代码:

(def command (atom ""))

(defn print-prompt []
  (print "prompt> ")
  (flush)
)

(defn ask-for-input []
    (print-prompt)
    (let [x (str (read-line))]
      (println (str "User input: " x))
      (reset! command x)
    )
)

我从没在屏幕上看到用户输入:"字符串.奇怪的是，如果我运行lein repl并调用(ask-for-input)，则它可以正常运行:S

解决方案

尝试蹦床跑步，它可以工作.

以下摘自leiningen常见问题解答:

The problem at hand is that when I run my program with lein run it gets to the (read-line) part and I can't get out of it, meaning: read-line never returns.

Here is the relevant code:

(def command (atom ""))

(defn print-prompt []
  (print "prompt> ")
  (flush)
)

(defn ask-for-input []
    (print-prompt)
    (let [x (str (read-line))]
      (println (str "User input: " x))
      (reset! command x)
    )
)

I never see the "User input: " string on screen.The strange part is, if I run lein repl and call (ask-for-input) then it works correctly :S

解决方案

Try lein trampoline run, it works.

The following is from leiningen FAQ:

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