41 lines
897 B
Ruby
41 lines
897 B
Ruby
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require_relative "values"
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module Vm
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# Think flowcharts: blocks are the boxes. The smallest unit of linear code
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# Blocks must end in control instructions (jump/call/return).
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# And the only valid argument for a jump is a Block
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# Blocks for a double linked list so one can traverse back and forth
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# There are four ways for a block to get data (to work on)
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# - hard coded constants (embedded in code)
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# - memory move
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# - values passed in (from previous blocks. ie local variables)
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# See Value description on how to create code/instructions
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class Block < Value
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def initialize(name)
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super()
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@name = name.to_sym
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end
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attr_reader :name
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def verify
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raise "Empty #{self.inspect}" if @values.empty?
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end
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private
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# possibly misguided ??
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def add_arg value
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# TODO check
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@args << value
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end
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end
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end
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