Class: Packcr::Parser::LrTable

Inherits:
Object
  • Object
show all
Defined in:
lib/packcr/parser.rb

Instance Method Summary collapse

Constructor Details

#initialize ⇒ LrTable

Returns a new instance of LrTable.



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# File 'lib/packcr/parser.rb', line 4096

def initialize
  super
  @buf = []
end

Instance Method Details

#get_answer(index, rule_name) ⇒ Object 



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# File 'lib/packcr/parser.rb', line 4147

def get_answer(index, rule_name)
  if index >= @buf.length
    return nil
  end
  entry = @buf[index]
  if !entry
    return nil
  end
  memos = entry.memos
  memos[rule_name]
end

#get_head(index) ⇒ Object 



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# File 'lib/packcr/parser.rb', line 4143

def get_head(index)
  @buf[index]&.head
end

#hold_answer(index, answer) ⇒ Object 



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# File 'lib/packcr/parser.rb', line 4135

def hold_answer(index, answer)
  if index >= @buf.length
    resize(index + 1)
  end
  entry = @buf[index] ||= LrTableEntry.new
  answer.hold, entry.hold_a = entry.hold_a, answer
end

#hold_head(index, head) ⇒ Object 



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# File 'lib/packcr/parser.rb', line 4119

def hold_head(index, head)
  if index >= @buf.length
    resize(index + 1)
  end
  entry = @buf[index] ||= LrTableEntry.new
  head.hold, entry.hold_h = entry.hold_h, head
end

#resize(len) ⇒ Object 



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# File 'lib/packcr/parser.rb', line 4105

def resize(len)
  (@buf.length...len).each do |i|
    @buf << nil
  end
end

#set_answer(index, rule_name, answer) ⇒ Object 



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# File 'lib/packcr/parser.rb', line 4127

def set_answer(index, rule_name, answer)
  if index >= @buf.length
    resize(index + 1)
  end
  entry = @buf[index] ||= LrTableEntry.new
  entry.memos[rule_name] = answer
end

#set_head(index, head) ⇒ Object 



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# File 'lib/packcr/parser.rb', line 4111

def set_head(index, head)
  if index >= @buf.length
    resize(index + 1)
  end
  entry = @buf[index] ||= LrTableEntry.new
  entry.head = head
end

#shift(count) ⇒ Object 



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# File 'lib/packcr/parser.rb', line 4101

def shift(count)
  @buf[0, count] = []
end