_nt_if

in logstash-core/lib/logstash/config/grammar.rb [2050:2144]

• 91 lines of code
• 18 McCabe index (conditional complexity)

  def _nt_if
    start_index = index
    if node_cache[:if].has_key?(index)
      cached = node_cache[:if][index]
      if cached
        node_cache[:if][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?("if", false, index))
      r1 = instantiate_node(SyntaxNode,input, index...(index + match_len))
      @index += match_len
    else
      terminal_parse_failure('"if"')
      r1 = nil
    end
    s0 << r1
    if r1
      r2 = _nt_cs
      s0 << r2
      if r2
        r3 = _nt_condition
        s0 << r3
        if r3
          r4 = _nt_cs
          s0 << r4
          if r4
            if (match_len = has_terminal?("{", false, index))
              r5 = true
              @index += match_len
            else
              terminal_parse_failure('"{"')
              r5 = nil
            end
            s0 << r5
            if r5
              r6 = _nt_cs
              s0 << r6
              if r6
                s7, i7 = [], index
                loop do
                  i8, s8 = index, []
                  r9 = _nt_branch_or_plugin
                  s8 << r9
                  if r9
                    r10 = _nt_cs
                    s8 << r10
                  end
                  if s8.last
                    r8 = instantiate_node(SyntaxNode,input, i8...index, s8)
                    r8.extend(If0)
                  else
                    @index = i8
                    r8 = nil
                  end
                  if r8
                    s7 << r8
                  else
                    break
                  end
                end
                r7 = instantiate_node(SyntaxNode,input, i7...index, s7)
                s0 << r7
                if r7
                  if (match_len = has_terminal?("}", false, index))
                    r11 = true
                    @index += match_len
                  else
                    terminal_parse_failure('"}"')
                    r11 = nil
                  end
                  s0 << r11
                end
              end
            end
          end
        end
      end
    end
    if s0.last
      r0 = instantiate_node(LogStash::Config::AST::If,input, i0...index, s0)
      r0.extend(If1)
    else
      @index = i0
      r0 = nil
    end

    node_cache[:if][start_index] = r0

    r0
  end