23 lines
496 B
Ruby
23 lines
496 B
Ruby
# We transform objects into a tree of nodes
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module Sof
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# abstract base class for nodes in the tree
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# may be referenced (should be a simple name or number)
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class Node
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include Util
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def initialize ref
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@referenced = ref
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end
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# must be able to output to a stream
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def out io ,level
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io.write "&#{@referenced} " if @referenced
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end
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def as_string(level)
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io = StringIO.new
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out(io,level)
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io.string
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end
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attr_reader :referenced
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end
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end
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