docs: def build_reduce_code(self, result, select, reduce):
          """
          Builds a reduce operation on the selected target range.
          """
  
          select = select.replace('/', '.')
          select = select.replace(' ', '')
          if reduce == 'add':
              reduce_op = '+'
              acc_start = 0
          else:
              reduce_op = '*'
              acc_start = 1
  
          #bits = select.split('[*]')
          bits = re.split('\[.*\]', select)
          seps = re.findall('\[.*\]', select)
  
          code = ['self.{0} = {1}'.format(result, acc_start)]
          code += ['self.{0}_shadow = {1}'.format(result, acc_start)]
  
          code += ['try:']
  
          if len(bits) == 1:
              target = select
              code += ['    self.{0} = self.{1}'.format(result, target)]
              code += ['    self.{0}_shadow = self.{1}'.format(result, target)]
          elif len(bits) == 2:
              sep = seps[0][1:-1]
  
              if sep == '*':
                  array = bits[0]
                  ref = bits[1]
  
                  code += ['    acc = {0}'.format(acc_start)]
                  code += ['    for o in self.{0}:'.format(array)]
                  code += ['        acc = acc {0} o{1}'.format(reduce_op, ref)]
                  code += ['    self.{0} = acc'.format(result)]
                  code += ['    self.{0}_shadow = acc'.format(result)]
              else:
                  bits2 = sep.split('=')
                  if len(bits2) > 1:
                      array = bits[0]
                      ref = bits[1]
  
                      code += ['    acc = {0}'.format(acc_start)]
                      code += ['    for o in self.{0}:'.format(array)]
                      code += ['        if o.{0} == {1}:'.format(bits2[0], bits2[1])]
                      code += ['            acc = acc {0} o{1}'.format(reduce_op, ref)]
                      code += ['    self.{0} = acc'.format(result)]
                      code += ['    self.{0}_shadow = acc'.format(result)]
                  else:
                      raise SimbuildError("Invalid reduce target - '{0}'".format(select))
          else:
              raise SimbuildError("Invalid reduce target - '{0}'".format(select))
  
          code += ['except:']
          code += ['    pass']
  
          return code