Josh Holtrop
30f4cfcc99
Fix bug of skipping rule set IDs. Remove unneeded out_sets from ItemSet class.
70 lines
1.5 KiB
Ruby
70 lines
1.5 KiB
Ruby
class Propane
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class Rule
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# @return [Array<Token, RuleSet>]
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# Rule components.
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attr_reader :components
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# @return [String]
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# User code associated with the rule.
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attr_reader :code
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# @return [Integer]
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# Rule ID.
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attr_reader :id
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# @return [Integer]
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# Line number where the rule was defined in the input grammar.
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attr_reader :line_number
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# @return [String]
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# Rule name.
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attr_reader :name
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# @return [RuleSet]
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# The RuleSet that this Rule is a part of.
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attr_accessor :rule_set
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# Construct a Rule.
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#
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# @param name [String]
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# Rule name.
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# @param components [Array<String>]
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# Rule components.
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# @param code [String]
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# User code associated with the rule.
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# @param line_number [Integer]
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# Line number where the rule was defined in the input grammar.
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# @param id [Integer]
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# Rule ID.
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def initialize(name, components, code, line_number, id)
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@name = name
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@components = components
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@code = code
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@id = id
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@line_number = line_number
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end
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# Return whether the Rule is empty.
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#
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# A Rule is empty if it has no components.
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#
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# @return [Boolean]
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# Whether the Rule is empty.
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def empty?
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@components.empty?
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end
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# Represent the Rule as a String.
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#
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# @return [String]
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# Rule represented as a String.
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def to_s
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"#{@name} -> #{@components.map(&:name).join(" ")}"
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end
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end
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end
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