logstash-core/lib/logstash/compiler/lscl/lscl_grammar.rb [856:1020]:
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      r0.extend(Attribute0)
    else
      @index = i0
      r0 = nil
    end

    node_cache[:attribute][start_index] = r0

    r0
  end

  def _nt_value
    start_index = index
    if node_cache[:value].has_key?(index)
      cached = node_cache[:value][index]
      if cached
        node_cache[:value][index] = cached = SyntaxNode.new(input, index...(index + 1)) if cached == true
        @index = cached.interval.end
      end
      return cached
    end

    i0 = index
    r1 = _nt_plugin
    if r1
      r1 = SyntaxNode.new(input, (index-1)...index) if r1 == true
      r0 = r1
    else
      r2 = _nt_bareword
      if r2
        r2 = SyntaxNode.new(input, (index-1)...index) if r2 == true
        r0 = r2
      else
        r3 = _nt_string
        if r3
          r3 = SyntaxNode.new(input, (index-1)...index) if r3 == true
          r0 = r3
        else
          r4 = _nt_number
          if r4
            r4 = SyntaxNode.new(input, (index-1)...index) if r4 == true
            r0 = r4
          else
            r5 = _nt_array
            if r5
              r5 = SyntaxNode.new(input, (index-1)...index) if r5 == true
              r0 = r5
            else
              r6 = _nt_hash
              if r6
                r6 = SyntaxNode.new(input, (index-1)...index) if r6 == true
                r0 = r6
              else
                @index = i0
                r0 = nil
              end
            end
          end
        end
      end
    end

    node_cache[:value][start_index] = r0

    r0
  end

  def _nt_array_value
    start_index = index
    if node_cache[:array_value].has_key?(index)
      cached = node_cache[:array_value][index]
      if cached
        node_cache[:array_value][index] = cached = SyntaxNode.new(input, index...(index + 1)) if cached == true
        @index = cached.interval.end
      end
      return cached
    end

    i0 = index
    r1 = _nt_bareword
    if r1
      r1 = SyntaxNode.new(input, (index-1)...index) if r1 == true
      r0 = r1
    else
      r2 = _nt_string
      if r2
        r2 = SyntaxNode.new(input, (index-1)...index) if r2 == true
        r0 = r2
      else
        r3 = _nt_number
        if r3
          r3 = SyntaxNode.new(input, (index-1)...index) if r3 == true
          r0 = r3
        else
          r4 = _nt_array
          if r4
            r4 = SyntaxNode.new(input, (index-1)...index) if r4 == true
            r0 = r4
          else
            r5 = _nt_hash
            if r5
              r5 = SyntaxNode.new(input, (index-1)...index) if r5 == true
              r0 = r5
            else
              @index = i0
              r0 = nil
            end
          end
        end
      end
    end

    node_cache[:array_value][start_index] = r0

    r0
  end

  module Bareword0
  end

  def _nt_bareword
    start_index = index
    if node_cache[:bareword].has_key?(index)
      cached = node_cache[:bareword][index]
      if cached
        node_cache[:bareword][index] = cached = SyntaxNode.new(input, index...(index + 1)) if cached == true
        @index = cached.interval.end
      end
      return cached
    end

    i0, s0 = index, []
    if has_terminal?(@regexps[gr = '\A[A-Za-z_]'] ||= Regexp.new(gr), :regexp, index)
      r1 = true
      @index += 1
    else
      terminal_parse_failure('[A-Za-z_]')
      r1 = nil
    end
    s0 << r1
    if r1
      s2, i2 = [], index
      loop do
        if has_terminal?(@regexps[gr = '\A[A-Za-z0-9_]'] ||= Regexp.new(gr), :regexp, index)
          r3 = true
          @index += 1
        else
          terminal_parse_failure('[A-Za-z0-9_]')
          r3 = nil
        end
        if r3
          s2 << r3
        else
          break
        end
      end
      if s2.empty?
        @index = i2
        r2 = nil
      else
        r2 = instantiate_node(SyntaxNode,input, i2...index, s2)
      end
      s0 << r2
    end
    if s0.last
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logstash-core/lib/logstash/config/grammar.rb [880:1044]:
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      r0.extend(Attribute0)
    else
      @index = i0
      r0 = nil
    end

    node_cache[:attribute][start_index] = r0

    r0
  end

  def _nt_value
    start_index = index
    if node_cache[:value].has_key?(index)
      cached = node_cache[:value][index]
      if cached
        node_cache[:value][index] = cached = SyntaxNode.new(input, index...(index + 1)) if cached == true
        @index = cached.interval.end
      end
      return cached
    end

    i0 = index
    r1 = _nt_plugin
    if r1
      r1 = SyntaxNode.new(input, (index-1)...index) if r1 == true
      r0 = r1
    else
      r2 = _nt_bareword
      if r2
        r2 = SyntaxNode.new(input, (index-1)...index) if r2 == true
        r0 = r2
      else
        r3 = _nt_string
        if r3
          r3 = SyntaxNode.new(input, (index-1)...index) if r3 == true
          r0 = r3
        else
          r4 = _nt_number
          if r4
            r4 = SyntaxNode.new(input, (index-1)...index) if r4 == true
            r0 = r4
          else
            r5 = _nt_array
            if r5
              r5 = SyntaxNode.new(input, (index-1)...index) if r5 == true
              r0 = r5
            else
              r6 = _nt_hash
              if r6
                r6 = SyntaxNode.new(input, (index-1)...index) if r6 == true
                r0 = r6
              else
                @index = i0
                r0 = nil
              end
            end
          end
        end
      end
    end

    node_cache[:value][start_index] = r0

    r0
  end

  def _nt_array_value
    start_index = index
    if node_cache[:array_value].has_key?(index)
      cached = node_cache[:array_value][index]
      if cached
        node_cache[:array_value][index] = cached = SyntaxNode.new(input, index...(index + 1)) if cached == true
        @index = cached.interval.end
      end
      return cached
    end

    i0 = index
    r1 = _nt_bareword
    if r1
      r1 = SyntaxNode.new(input, (index-1)...index) if r1 == true
      r0 = r1
    else
      r2 = _nt_string
      if r2
        r2 = SyntaxNode.new(input, (index-1)...index) if r2 == true
        r0 = r2
      else
        r3 = _nt_number
        if r3
          r3 = SyntaxNode.new(input, (index-1)...index) if r3 == true
          r0 = r3
        else
          r4 = _nt_array
          if r4
            r4 = SyntaxNode.new(input, (index-1)...index) if r4 == true
            r0 = r4
          else
            r5 = _nt_hash
            if r5
              r5 = SyntaxNode.new(input, (index-1)...index) if r5 == true
              r0 = r5
            else
              @index = i0
              r0 = nil
            end
          end
        end
      end
    end

    node_cache[:array_value][start_index] = r0

    r0
  end

  module Bareword0
  end

  def _nt_bareword
    start_index = index
    if node_cache[:bareword].has_key?(index)
      cached = node_cache[:bareword][index]
      if cached
        node_cache[:bareword][index] = cached = SyntaxNode.new(input, index...(index + 1)) if cached == true
        @index = cached.interval.end
      end
      return cached
    end

    i0, s0 = index, []
    if has_terminal?(@regexps[gr = '\A[A-Za-z_]'] ||= Regexp.new(gr), :regexp, index)
      r1 = true
      @index += 1
    else
      terminal_parse_failure('[A-Za-z_]')
      r1 = nil
    end
    s0 << r1
    if r1
      s2, i2 = [], index
      loop do
        if has_terminal?(@regexps[gr = '\A[A-Za-z0-9_]'] ||= Regexp.new(gr), :regexp, index)
          r3 = true
          @index += 1
        else
          terminal_parse_failure('[A-Za-z0-9_]')
          r3 = nil
        end
        if r3
          s2 << r3
        else
          break
        end
      end
      if s2.empty?
        @index = i2
        r2 = nil
      else
        r2 = instantiate_node(SyntaxNode,input, i2...index, s2)
      end
      s0 << r2
    end
    if s0.last
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