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shelling/calculate.rb

Created July 17, 2014 04:06
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calculate.rb
#!/usr/bin/env ruby
require "parslet"
require "pp"
class SimpleParser < Parslet::Parser
rule :top do
integer
end
rule :integer do
match('[0-9]').repeat(1)
end
root :top
end
pp SimpleParser.new.parse("123")
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