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Versions: 9
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Contents
module Rley # This module is used as a namespace
module PTree # This module is used as a namespace
class TokenRange
# The index of the lower bound of token range
attr_reader(:low)
# The index of the upper bound of token range
attr_reader(:high)
# @param aRangeRep [Hash]
def initialize(aRangeRep)
assign_low(aRangeRep)
assign_high(aRangeRep)
end
def ==(other)
return true if object_id == other.object_id
case other
when Hash
result = low == other[:low] && high == other[:high]
when TokenRange
result = low == other.low && high == other.high
end
return result
end
# true when both bounds aren't nil.
def bounded?()
return !(low.nil? || high.nil?)
end
# Conditional assign
def assign(aRange)
return if bounded?
assign_low(aRange) if low.nil?
assign_high(aRange) if high.nil?
end
private
def assign_low(aRange)
case aRange
when Hash then @low = aRange.fetch(:low, nil)
when TokenRange then @low = aRange.low
end
end
def assign_high(aRange)
case aRange
when Hash then @high = aRange.fetch(:high, nil)
when TokenRange then @high = aRange.high
end
end
end # class
end # module
end # module
# End of file
Version data entries
9 entries across 9 versions & 1 rubygems