Method push_parameter_definitions

src/jinja2/compiler.py:736–743

Pushes all parameter targets from the given frame into a local stack that permits tracking of yet to be assigned parameters. In particular this enables the optimization from `visit_Name` to skip undefined expressions for parameters in macros as macros can reference o

(self, frame: Frame)

        self.writeline("if 0: yield None")

    def push_parameter_definitions(self, frame: Frame) -> None:
        """Pushes all parameter targets from the given frame into a local
        stack that permits tracking of yet to be assigned parameters.  In
        particular this enables the optimization from `visit_Name` to skip
        undefined expressions for parameters in macros as macros can reference
        otherwise unbound parameters.
        """
        self._param_def_block.append(frame.symbols.dump_param_targets())

    def pop_parameter_definitions(self) -> None:
        """Pops the current parameter definitions set."""