43 lines
705 B
Ruby
43 lines
705 B
Ruby
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require 'rubygems'
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require 'readline'
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require 'ruby_parser'
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class RubyParser
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def self.valid?(code)
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new.parse(code)
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rescue Racc::ParseError
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false
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else
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true
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end
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end
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def pry(target)
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eval_string = ""
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while true
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prompt = ""
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if eval_string.empty?
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prompt = "> "
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else
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prompt = "* "
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end
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val = Readline.readline(prompt, true)
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eval_string += val
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if val == "!"
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eval_string = ""
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puts "refreshing REPL state"
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break
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end
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exit if val == "quit"
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break if RubyParser.valid?(eval_string)
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end
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begin
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puts "=> #{target.instance_eval(eval_string).inspect}"
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rescue StandardError => e
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puts "#{e.message}"
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end
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end
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