code: def visit_Slice(self, node):
          
          self.generic_visit(node)
          if node.step is None or (isinstance(node.step, ast.Num) and
                                   node.step.n == 1):
              self.result[node] = self.builder.NamedType(
                  'pythonic::types::contiguous_slice')
          else:
              self.result[node] = self.builder.NamedType(
                  'pythonic::types::slice')
docs: Set slicing type using continuous information if provided.
  
          Also visit subnodes as they may contains relevant typing information.