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Use def_delegators in Lrama::States::Item #365

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merged 1 commit into from
Jan 29, 2024
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Use def_delegators in Lrama::States::Item #365

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14 changes: 6 additions & 8 deletions lib/lrama/states/item.rb
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Original file line number Diff line number Diff line change
@@ -1,8 +1,14 @@
# TODO: Validate position is not over rule rhs

require "forwardable"

module Lrama
class States
class Item < Struct.new(:rule, :position, keyword_init: true)
extend Forwardable

def_delegators "rule", :lhs, :rhs

# Optimization for States#setup_state
def hash
[rule_id, position].hash
Expand All @@ -20,14 +26,6 @@ def number_of_rest_symbols
rhs.count - position
end

def lhs
rule.lhs
end

def rhs
rule.rhs
end

def next_sym
rhs[position]
end
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