parameters: ()
docstring: Return an iterator over all lexer classes.
docstring_summary: Return an iterator over all lexer classes.
docstring_tokens: Return an iterator over all lexer classes .
function: def _iter_lexerclasses():
      """
      Return an iterator over all lexer classes.
      """
      for key in sorted(LEXERS):
          module_name, name = LEXERS[key][:2]
          if name not in _lexer_cache:
              _load_lexers(module_name)
          yield _lexer_cache[name]
      for lexer in find_plugin_lexers():
          yield lexer
function_tokens: def _iter_lexerclasses ( ) : for key in sorted ( LEXERS ) : module_name , name = LEXERS [ key ] [ : 2 ] if name not in _lexer_cache : _load_lexers ( module_name ) yield _lexer_cache [ name ] for lexer in find_plugin_lexers ( ) : yield lexer