#!/usr/bin/env ruby -w

$LOAD_PATH.unshift(File.expand_path("../lib", __dir__))

require "lox"

def run_prompt(runner)
  loop do
    print "> "
    line = gets
    break if line.nil? || line.empty?
    runner.run(line)
  end
end

def run_file(runner, io)
  runner.run(io.read)
end


if __FILE__ == $0
  puts "Usage: #$0 [script]" or exit 64 if ARGV.length > 1

  if ARGV.empty?
    run_prompt(Lox::PromptRunner.new)
  else
    Lox::FileRunner.new.run(ARGF.read)
  end
end