27 lines
501 B
Ruby
27 lines
501 B
Ruby
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# coding: utf-8
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module Rpn
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class Runner
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def initialize; end
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def run_input( stack, dictionary, input )
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input.each do |elt|
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case elt[:type]
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when :word
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command = dictionary.lookup( elt[:value] )
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if command.nil?
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stack << { type: :name, value: "'#{elt[:value]}'" }
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else
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stack = command.call( stack )
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end
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else
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stack << elt
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end
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end
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[stack, dictionary]
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end
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end
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end
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