module Cucumber::Parser::Feature

def _nt_step
  start_index = index
  if node_cache[:step].has_key?(index)
    cached = node_cache[:step][index]
    @index = cached.interval.end if cached
    return cached
  end
  i0, s0 = index, []
  r1 = _nt_comment
  s0 << r1
  if r1
    s2, i2 = [], index
    loop do
      r3 = _nt_space
      if r3
        s2 << r3
      else
        break
      end
    end
    r2 = instantiate_node(SyntaxNode,input, i2...index, s2)
    s0 << r2
    if r2
      r4 = _nt_step_keyword
      s0 << r4
      if r4
        r5 = _nt_keyword_space
        s0 << r5
        if r5
          r6 = _nt_line_to_eol
          s0 << r6
          if r6
            i7 = index
            s8, i8 = [], index
            loop do
              r9 = _nt_eol
              if r9
                s8 << r9
              else
                break
              end
            end
            if s8.empty?
              @index = i8
              r8 = nil
            else
              r8 = instantiate_node(SyntaxNode,input, i8...index, s8)
            end
            if r8
              r7 = r8
            else
              r10 = _nt_eof
              if r10
                r7 = r10
              else
                @index = i7
                r7 = nil
              end
            end
            s0 << r7
            if r7
              r12 = _nt_multiline_arg
              if r12
                r11 = r12
              else
                r11 = instantiate_node(SyntaxNode,input, index...index)
              end
              s0 << r11
              if r11
                r13 = _nt_white
                s0 << r13
              end
            end
          end
        end
      end
    end
  end
  if s0.last
    r0 = instantiate_node(SyntaxNode,input, i0...index, s0)
    r0.extend(Step0)
    r0.extend(Step1)
  else
    @index = i0
    r0 = nil
  end
  node_cache[:step][start_index] = r0
  r0
end