# A very simple Read-Eval-Print-Loop. Compiles one line at a time to JavaScript

# and evaluates it. Good for simple tests, or poking around the **Node.js** API.

# Using it looks like this:

#

# coffee> puts "#{num} bottles of beer" for num in [99..1]

# Require the **coffee-script** module to get access to the compiler.

CoffeeScript = require './coffee-script'

helpers = require('./helpers').helpers

readline = require 'readline'

# Start by opening up **stdio**.

stdio = process.openStdin()

# Quick alias for quitting the REPL.

helpers.extend global, quit: -> process.exit(0)

# The main REPL function. **run** is called every time a line of code is entered.

# Attempt to evaluate the command. If there's an exception, print it out instead

# of exiting.

run = (buffer) ->

try

val = CoffeeScript.run buffer.toString(), noWrap: true, globals: true, fileName: 'repl'

puts inspect val if val isnt undefined

catch err

puts err.stack or err.toString()

repl.prompt()

# Create the REPL by listening to **stdin**.

repl = readline.createInterface stdio

repl.setPrompt 'coffee> '

stdio.on 'data', (buffer) -> repl.write buffer

repl.on 'close', -> stdio.destroy()

repl.on 'line', run

repl.prompt()