chervil/bin/chervil

#!/usr/bin/env ruby

require "chervil"
require "readline"

def repl(env)
  begin
    while line = Readline.readline("> ", true)
      break if line == "(exit)"
      lexer = Chervil::Lexer.new(line)
      tree = Chervil::Parser.new(lexer).parse

      if tree.is_a? Chervil::Error
        puts tree
        next
      end

      results = Chervil::Interpreter.new(tree, env).interpret
      results.each { |result| puts result unless result.nil? }
    end
  rescue Interrupt
    puts
    repl(env)
  end
end

env = Chervil::Env.new
repl(env)