text: from pathlib import Path
  import pegpy.tpeg as peg
  
  
  class NezCC(object):
      def __init__(self, options):
          self.SIDs = {}
          self.applyfmt = options.get('apply', '{}({})')
          self.delimfmt = options.get('delim', ',')
  
      def apply(self, name, *args):
          if len(args) == 0:
              return self.applyfmt.format(name, '')
          elif len(args) == 1:
              return self.applyfmt.format(name, args[0])
          else:
              return self.applyfmt.format(name, self.delimfmt.join(args))
  
      def emit(self, pe, **options):
          tag = pe.__class__.__name__
          if tag == 'Action':
              tag = pe.func.capitalize()
          if hasattr(self, tag):
              f = getattr(self, tag)
              return f(pe, **options)
          else:
              return self.Undefined(pe, **options)
  
      def Undefined(self, pe, **options):
          return f'TODO({pe})'
  
      def Char(self, pe, **options):
          quote = options['quote']
          if len(pe.text) == 0:
              return self.apply('pEmpty')
          return self.apply('pChar', quote(pe.text))
  
      def Range(self, pe, **options):
          quote = options['quote']
          chars = quote(pe.chars)
          delim = options.get('listdelim', ',')
          listfmt = options.get('list', '[{}]')
          ranges = listfmt.format(delim.join(
              [quote(r[0]+r[1]) for r in pe.ranges]))
          return self.apply('pRange', chars, ranges)
  
      def Any(self, pe, **options):
          return self.apply('pAny')
  
      def And(self, pe, **options):
          e = self.emit(pe.e, **options)
          return self.apply('pAnd', e)
  
      def Not(self, pe, **options):
          e = self.emit(pe.e, **options)
          return self.apply('pNot', e)
  
      def Many(self, pe, **options):
          e = self.emit(pe.e, **options)
          return self.apply('pMany', e)
  
      def Many1(self, pe, **options):
          e = self.emit(pe.e, **options)
          return self.apply('pMany1', e)
  
      def Option(self, pe, **options):
          e = self.emit(pe.e, **options)
          return self.apply('pOption', e)
  
      def Seq2(self, pe, **options):
          fs = [self.emit(e, **options) for e in pe]
          if len(fs) == 2:
              return self.apply('pSeq2', *fs)
          if len(fs) == 3:
              return self.apply('pSeq3', *fs)
          return self.apply('pSeq', *fs)
  
      def Ore2(self, pe, **options):
          fs = [self.emit(e, **options) for e in pe]
          if len(fs) == 2:
              return self.apply('pOre2', *fs)
          return self.apply('pOre', *fs)
  
      def Alt2(self, pe, **options):
          return self.Ore2(pe, **options)
  
      def Ref(self, pe, **options):
          quote = options['quote']
          grammar = options.get('peg', 'peg')
          return self.apply('pRef', grammar, quote(pe.name))
  
      def Node(self, pe, **options):
          e = self.emit(pe.e, **options)
          quote = options['quote']
          return self.apply('pNode', e, quote(pe.tag), '0')
  
      def Edge2(self, pe, **options):
          quote = options['quote']
          e = self.emit(pe.e, **options)
          return self.apply('pEdge', quote(pe.edge), e)
  
      def Fold2(self, pe, **options):
          quote = options['quote']
          e = self.emit(pe.e, **options)
          return self.apply('pFold', quote(pe.edge), e, quote(pe.tag), '0')
  
      def Abs(self, pe, **options):
          e = self.emit(pe.e, **options)
          return self.apply('pAbs', e)
  
      '''
      def Lazy(self, pe, **options):
          params = pe.params
          name = pe.e.name
          peg = option.get('peg')
          fname = pe.func
          params = pe.params
          return self.Undefined(pe, **options)
      '''
  
      def Skip(self, pe, **options):
          return self.apply('pSkipErr')
  
      def getsid(self, name):
          if not name in self.SIDs:
              self.SIDs[name] = len(self.SIDs)
          return self.SIDs[name]
  
      def Symbol(self, pe, **options):
          sid = self.getsid(str(pe.params[0]))
          e = self.emit(pe.e, **options)
          return self.apply('pSymbol', str(sid), e)
  
      def Exists(self, pe, **options):
          sid = self.getsid(str(pe.params[0]))
          return self.apply('pExists', str(sid))
  
      def Match(self, pe, **options):
          sid = self.getsid(str(pe.params[0]))
          return self.apply('pMatch', str(sid))
  
      def Scope(self, pe, **options):
          e = self.emit(pe.e, **options)
          return self.apply('pScope', e)
  
      def example(self, g, options):
          for testcase in g['@@example']:
              name, pos4 = testcase
              if not name in g:
                  continue
              text = pos4.inputs[pos4.spos:pos4.epos]
              indent = options['indent']
              print(indent + self.apply('example', repr(name), repr(text)))
  
  
  def generate(nezcc, g, **options):
      quote = options.get('quote', repr)
      indent = options.get('indent', '\t')
      rule = options.get('rule', '{}peg[{}] = {};')
      for name in g.N:
          func = nezcc.emit(g[name], **options)
          print(rule.format(indent, quote(name), func))
  
  
  def setline(line: str, options):
      indent = []
      for c in line:
          if c != ' ' and c != '\t':
              break
          indent.append(c)
      options['indent'] = ''.join(indent)
  
  
  def getoption(path: Path, line: str):
      options = {}
      if 'quote' not in options:
          options['quote'] = repr
      return options
  
  
  def nezcc(file, g):
      path = Path(file)
      if not path.exists():
          path = Path(__file__).resolve().parent / 'nezcc' / path
      options = getoption(path, '')
      pegcc = NezCC(options)
      with path.open() as f:
          for line in f.readlines():
              line = line.rstrip()
              if 'TPEG' in line:
                  setline(line, options)
                  generate(pegcc, g, **options)
              elif 'EXAMPLE' in line and '@@example' in g:
                  setline(line, options)
                  pegcc.example(g, options)
              else:
                  print(line)
  
  
  if __name__ == '__main__':
      g = peg.grammar('''
  A = 'abc' [A]
  ''')
      nezcc('empty.ts', g)
  