_nt_array

in logstash-core/lib/logstash/config/grammar.rb [1582:1690]

• 105 lines of code
• 20 McCabe index (conditional complexity)

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

    i0, s0 = index, []
    if (match_len = has_terminal?("[", false, index))
      r1 = true
      @index += match_len
    else
      terminal_parse_failure('"["')
      r1 = nil
    end
    s0 << r1
    if r1
      r2 = _nt_cs
      s0 << r2
      if r2
        i4, s4 = index, []
        r5 = _nt_value
        s4 << r5
        if r5
          s6, i6 = [], index
          loop do
            i7, s7 = index, []
            r8 = _nt_cs
            s7 << r8
            if r8
              if (match_len = has_terminal?(",", false, index))
                r9 = true
                @index += match_len
              else
                terminal_parse_failure('","')
                r9 = nil
              end
              s7 << r9
              if r9
                r10 = _nt_cs
                s7 << r10
                if r10
                  r11 = _nt_value
                  s7 << r11
                end
              end
            end
            if s7.last
              r7 = instantiate_node(SyntaxNode,input, i7...index, s7)
              r7.extend(Array0)
            else
              @index = i7
              r7 = nil
            end
            if r7
              s6 << r7
            else
              break
            end
          end
          r6 = instantiate_node(SyntaxNode,input, i6...index, s6)
          s4 << r6
        end
        if s4.last
          r4 = instantiate_node(SyntaxNode,input, i4...index, s4)
          r4.extend(Array1)
        else
          @index = i4
          r4 = nil
        end
        if r4
          r3 = r4
        else
          r3 = instantiate_node(SyntaxNode,input, index...index)
        end
        s0 << r3
        if r3
          r12 = _nt_cs
          s0 << r12
          if r12
            if (match_len = has_terminal?("]", false, index))
              r13 = true
              @index += match_len
            else
              terminal_parse_failure('"]"')
              r13 = nil
            end
            s0 << r13
          end
        end
      end
    end
    if s0.last
      r0 = instantiate_node(LogStash::Config::AST::Array,input, i0...index, s0)
      r0.extend(Array2)
    else
      @index = i0
      r0 = nil
    end

    node_cache[:array][start_index] = r0

    r0
  end