fix ya.make

1 files changed, 0 insertions, 1957 deletions

diff --git a/contrib/python/Jinja2/py3/jinja2/compiler.py b/contrib/python/Jinja2/py3/jinja2/compiler.py
deleted file mode 100644
index 52fd5b83e20..00000000000
--- a/contrib/python/Jinja2/py3/jinja2/compiler.py
+++ /dev/null
@@ -1,1957 +0,0 @@
-"""Compiles nodes from the parser into Python code."""
-import typing as t
-from contextlib import contextmanager
-from functools import update_wrapper
-from io import StringIO
-from itertools import chain
-from keyword import iskeyword as is_python_keyword
-
-from markupsafe import escape
-from markupsafe import Markup
-
-from . import nodes
-from .exceptions import TemplateAssertionError
-from .idtracking import Symbols
-from .idtracking import VAR_LOAD_ALIAS
-from .idtracking import VAR_LOAD_PARAMETER
-from .idtracking import VAR_LOAD_RESOLVE
-from .idtracking import VAR_LOAD_UNDEFINED
-from .nodes import EvalContext
-from .optimizer import Optimizer
-from .utils import _PassArg
-from .utils import concat
-from .visitor import NodeVisitor
-
-if t.TYPE_CHECKING:
-    import typing_extensions as te
-    from .environment import Environment
-
-F = t.TypeVar("F", bound=t.Callable[..., t.Any])
-
-operators = {
-    "eq": "==",
-    "ne": "!=",
-    "gt": ">",
-    "gteq": ">=",
-    "lt": "<",
-    "lteq": "<=",
-    "in": "in",
-    "notin": "not in",
-}
-
-
-def optimizeconst(f: F) -> F:
-    def new_func(
-        self: "CodeGenerator", node: nodes.Expr, frame: "Frame", **kwargs: t.Any
-    ) -> t.Any:
-        # Only optimize if the frame is not volatile
-        if self.optimizer is not None and not frame.eval_ctx.volatile:
-            new_node = self.optimizer.visit(node, frame.eval_ctx)
-
-            if new_node != node:
-                return self.visit(new_node, frame)
-
-        return f(self, node, frame, **kwargs)
-
-    return update_wrapper(t.cast(F, new_func), f)
-
-
-def _make_binop(op: str) -> t.Callable[["CodeGenerator", nodes.BinExpr, "Frame"], None]:
-    @optimizeconst
-    def visitor(self: "CodeGenerator", node: nodes.BinExpr, frame: Frame) -> None:
-        if (
-            self.environment.sandboxed
-            and op in self.environment.intercepted_binops  # type: ignore
-        ):
-            self.write(f"environment.call_binop(context, {op!r}, ")
-            self.visit(node.left, frame)
-            self.write(", ")
-            self.visit(node.right, frame)
-        else:
-            self.write("(")
-            self.visit(node.left, frame)
-            self.write(f" {op} ")
-            self.visit(node.right, frame)
-
-        self.write(")")
-
-    return visitor
-
-
-def _make_unop(
-    op: str,
-) -> t.Callable[["CodeGenerator", nodes.UnaryExpr, "Frame"], None]:
-    @optimizeconst
-    def visitor(self: "CodeGenerator", node: nodes.UnaryExpr, frame: Frame) -> None:
-        if (
-            self.environment.sandboxed
-            and op in self.environment.intercepted_unops  # type: ignore
-        ):
-            self.write(f"environment.call_unop(context, {op!r}, ")
-            self.visit(node.node, frame)
-        else:
-            self.write("(" + op)
-            self.visit(node.node, frame)
-
-        self.write(")")
-
-    return visitor
-
-
-def generate(
-    node: nodes.Template,
-    environment: "Environment",
-    name: t.Optional[str],
-    filename: t.Optional[str],
-    stream: t.Optional[t.TextIO] = None,
-    defer_init: bool = False,
-    optimized: bool = True,
-) -> t.Optional[str]:
-    """Generate the python source for a node tree."""
-    if not isinstance(node, nodes.Template):
-        raise TypeError("Can't compile non template nodes")
-
-    generator = environment.code_generator_class(
-        environment, name, filename, stream, defer_init, optimized
-    )
-    generator.visit(node)
-
-    if stream is None:
-        return generator.stream.getvalue()  # type: ignore
-
-    return None
-
-
-def has_safe_repr(value: t.Any) -> bool:
-    """Does the node have a safe representation?"""
-    if value is None or value is NotImplemented or value is Ellipsis:
-        return True
-
-    if type(value) in {bool, int, float, complex, range, str, Markup}:
-        return True
-
-    if type(value) in {tuple, list, set, frozenset}:
-        return all(has_safe_repr(v) for v in value)
-
-    if type(value) is dict:
-        return all(has_safe_repr(k) and has_safe_repr(v) for k, v in value.items())
-
-    return False
-
-
-def find_undeclared(
-    nodes: t.Iterable[nodes.Node], names: t.Iterable[str]
-) -> t.Set[str]:
-    """Check if the names passed are accessed undeclared.  The return value
-    is a set of all the undeclared names from the sequence of names found.
-    """
-    visitor = UndeclaredNameVisitor(names)
-    try:
-        for node in nodes:
-            visitor.visit(node)
-    except VisitorExit:
-        pass
-    return visitor.undeclared
-
-
-class MacroRef:
-    def __init__(self, node: t.Union[nodes.Macro, nodes.CallBlock]) -> None:
-        self.node = node
-        self.accesses_caller = False
-        self.accesses_kwargs = False
-        self.accesses_varargs = False
-
-
-class Frame:
-    """Holds compile time information for us."""
-
-    def __init__(
-        self,
-        eval_ctx: EvalContext,
-        parent: t.Optional["Frame"] = None,
-        level: t.Optional[int] = None,
-    ) -> None:
-        self.eval_ctx = eval_ctx
-
-        # the parent of this frame
-        self.parent = parent
-
-        if parent is None:
-            self.symbols = Symbols(level=level)
-
-            # in some dynamic inheritance situations the compiler needs to add
-            # write tests around output statements.
-            self.require_output_check = False
-
-            # inside some tags we are using a buffer rather than yield statements.
-            # this for example affects {% filter %} or {% macro %}.  If a frame
-            # is buffered this variable points to the name of the list used as
-            # buffer.
-            self.buffer: t.Optional[str] = None
-
-            # the name of the block we're in, otherwise None.
-            self.block: t.Optional[str] = None
-
-        else:
-            self.symbols = Symbols(parent.symbols, level=level)
-            self.require_output_check = parent.require_output_check
-            self.buffer = parent.buffer
-            self.block = parent.block
-
-        # a toplevel frame is the root + soft frames such as if conditions.
-        self.toplevel = False
-
-        # the root frame is basically just the outermost frame, so no if
-        # conditions.  This information is used to optimize inheritance
-        # situations.
-        self.rootlevel = False
-
-        # variables set inside of loops and blocks should not affect outer frames,
-        # but they still needs to be kept track of as part of the active context.
-        self.loop_frame = False
-        self.block_frame = False
-
-        # track whether the frame is being used in an if-statement or conditional
-        # expression as it determines which errors should be raised during runtime
-        # or compile time.
-        self.soft_frame = False
-
-    def copy(self) -> "Frame":
-        """Create a copy of the current one."""
-        rv = t.cast(Frame, object.__new__(self.__class__))
-        rv.__dict__.update(self.__dict__)
-        rv.symbols = self.symbols.copy()
-        return rv
-
-    def inner(self, isolated: bool = False) -> "Frame":
-        """Return an inner frame."""
-        if isolated:
-            return Frame(self.eval_ctx, level=self.symbols.level + 1)
-        return Frame(self.eval_ctx, self)
-
-    def soft(self) -> "Frame":
-        """Return a soft frame.  A soft frame may not be modified as
-        standalone thing as it shares the resources with the frame it
-        was created of, but it's not a rootlevel frame any longer.
-
-        This is only used to implement if-statements and conditional
-        expressions.
-        """
-        rv = self.copy()
-        rv.rootlevel = False
-        rv.soft_frame = True
-        return rv
-
-    __copy__ = copy
-
-
-class VisitorExit(RuntimeError):
-    """Exception used by the `UndeclaredNameVisitor` to signal a stop."""
-
-
-class DependencyFinderVisitor(NodeVisitor):
-    """A visitor that collects filter and test calls."""
-
-    def __init__(self) -> None:
-        self.filters: t.Set[str] = set()
-        self.tests: t.Set[str] = set()
-
-    def visit_Filter(self, node: nodes.Filter) -> None:
-        self.generic_visit(node)
-        self.filters.add(node.name)
-
-    def visit_Test(self, node: nodes.Test) -> None:
-        self.generic_visit(node)
-        self.tests.add(node.name)
-
-    def visit_Block(self, node: nodes.Block) -> None:
-        """Stop visiting at blocks."""
-
-
-class UndeclaredNameVisitor(NodeVisitor):
-    """A visitor that checks if a name is accessed without being
-    declared.  This is different from the frame visitor as it will
-    not stop at closure frames.
-    """
-
-    def __init__(self, names: t.Iterable[str]) -> None:
-        self.names = set(names)
-        self.undeclared: t.Set[str] = set()
-
-    def visit_Name(self, node: nodes.Name) -> None:
-        if node.ctx == "load" and node.name in self.names:
-            self.undeclared.add(node.name)
-            if self.undeclared == self.names:
-                raise VisitorExit()
-        else:
-            self.names.discard(node.name)
-
-    def visit_Block(self, node: nodes.Block) -> None:
-        """Stop visiting a blocks."""
-
-
-class CompilerExit(Exception):
-    """Raised if the compiler encountered a situation where it just
-    doesn't make sense to further process the code.  Any block that
-    raises such an exception is not further processed.
-    """
-
-
-class CodeGenerator(NodeVisitor):
-    def __init__(
-        self,
-        environment: "Environment",
-        name: t.Optional[str],
-        filename: t.Optional[str],
-        stream: t.Optional[t.TextIO] = None,
-        defer_init: bool = False,
-        optimized: bool = True,
-    ) -> None:
-        if stream is None:
-            stream = StringIO()
-        self.environment = environment
-        self.name = name
-        self.filename = filename
-        self.stream = stream
-        self.created_block_context = False
-        self.defer_init = defer_init
-        self.optimizer: t.Optional[Optimizer] = None
-
-        if optimized:
-            self.optimizer = Optimizer(environment)
-
-        # aliases for imports
-        self.import_aliases: t.Dict[str, str] = {}
-
-        # a registry for all blocks.  Because blocks are moved out
-        # into the global python scope they are registered here
-        self.blocks: t.Dict[str, nodes.Block] = {}
-
-        # the number of extends statements so far
-        self.extends_so_far = 0
-
-        # some templates have a rootlevel extends.  In this case we
-        # can safely assume that we're a child template and do some
-        # more optimizations.
-        self.has_known_extends = False
-
-        # the current line number
-        self.code_lineno = 1
-
-        # registry of all filters and tests (global, not block local)
-        self.tests: t.Dict[str, str] = {}
-        self.filters: t.Dict[str, str] = {}
-
-        # the debug information
-        self.debug_info: t.List[t.Tuple[int, int]] = []
-        self._write_debug_info: t.Optional[int] = None
-
-        # the number of new lines before the next write()
-        self._new_lines = 0
-
-        # the line number of the last written statement
-        self._last_line = 0
-
-        # true if nothing was written so far.
-        self._first_write = True
-
-        # used by the `temporary_identifier` method to get new
-        # unique, temporary identifier
-        self._last_identifier = 0
-
-        # the current indentation
-        self._indentation = 0
-
-        # Tracks toplevel assignments
-        self._assign_stack: t.List[t.Set[str]] = []
-
-        # Tracks parameter definition blocks
-        self._param_def_block: t.List[t.Set[str]] = []
-
-        # Tracks the current context.
-        self._context_reference_stack = ["context"]
-
-    @property
-    def optimized(self) -> bool:
-        return self.optimizer is not None
-
-    # -- Various compilation helpers
-
-    def fail(self, msg: str, lineno: int) -> "te.NoReturn":
-        """Fail with a :exc:`TemplateAssertionError`."""
-        raise TemplateAssertionError(msg, lineno, self.name, self.filename)
-
-    def temporary_identifier(self) -> str:
-        """Get a new unique identifier."""
-        self._last_identifier += 1
-        return f"t_{self._last_identifier}"
-
-    def buffer(self, frame: Frame) -> None:
-        """Enable buffering for the frame from that point onwards."""
-        frame.buffer = self.temporary_identifier()
-        self.writeline(f"{frame.buffer} = []")
-
-    def return_buffer_contents(
-        self, frame: Frame, force_unescaped: bool = False
-    ) -> None:
-        """Return the buffer contents of the frame."""
-        if not force_unescaped:
-            if frame.eval_ctx.volatile:
-                self.writeline("if context.eval_ctx.autoescape:")
-                self.indent()
-                self.writeline(f"return Markup(concat({frame.buffer}))")
-                self.outdent()
-                self.writeline("else:")
-                self.indent()
-                self.writeline(f"return concat({frame.buffer})")
-                self.outdent()
-                return
-            elif frame.eval_ctx.autoescape:
-                self.writeline(f"return Markup(concat({frame.buffer}))")
-                return
-        self.writeline(f"return concat({frame.buffer})")
-
-    def indent(self) -> None:
-        """Indent by one."""
-        self._indentation += 1
-
-    def outdent(self, step: int = 1) -> None:
-        """Outdent by step."""
-        self._indentation -= step
-
-    def start_write(self, frame: Frame, node: t.Optional[nodes.Node] = None) -> None:
-        """Yield or write into the frame buffer."""
-        if frame.buffer is None:
-            self.writeline("yield ", node)
-        else:
-            self.writeline(f"{frame.buffer}.append(", node)
-
-    def end_write(self, frame: Frame) -> None:
-        """End the writing process started by `start_write`."""
-        if frame.buffer is not None:
-            self.write(")")
-
-    def simple_write(
-        self, s: str, frame: Frame, node: t.Optional[nodes.Node] = None
-    ) -> None:
-        """Simple shortcut for start_write + write + end_write."""
-        self.start_write(frame, node)
-        self.write(s)
-        self.end_write(frame)
-
-    def blockvisit(self, nodes: t.Iterable[nodes.Node], frame: Frame) -> None:
-        """Visit a list of nodes as block in a frame.  If the current frame
-        is no buffer a dummy ``if 0: yield None`` is written automatically.
-        """
-        try:
-            self.writeline("pass")
-            for node in nodes:
-                self.visit(node, frame)
-        except CompilerExit:
-            pass
-
-    def write(self, x: str) -> None:
-        """Write a string into the output stream."""
-        if self._new_lines:
-            if not self._first_write:
-                self.stream.write("\n" * self._new_lines)
-                self.code_lineno += self._new_lines
-                if self._write_debug_info is not None:
-                    self.debug_info.append((self._write_debug_info, self.code_lineno))
-                    self._write_debug_info = None
-            self._first_write = False
-            self.stream.write("    " * self._indentation)
-            self._new_lines = 0
-        self.stream.write(x)
-
-    def writeline(
-        self, x: str, node: t.Optional[nodes.Node] = None, extra: int = 0
-    ) -> None:
-        """Combination of newline and write."""
-        self.newline(node, extra)
-        self.write(x)
-
-    def newline(self, node: t.Optional[nodes.Node] = None, extra: int = 0) -> None:
-        """Add one or more newlines before the next write."""
-        self._new_lines = max(self._new_lines, 1 + extra)
-        if node is not None and node.lineno != self._last_line:
-            self._write_debug_info = node.lineno
-            self._last_line = node.lineno
-
-    def signature(
-        self,
-        node: t.Union[nodes.Call, nodes.Filter, nodes.Test],
-        frame: Frame,
-        extra_kwargs: t.Optional[t.Mapping[str, t.Any]] = None,
-    ) -> None:
-        """Writes a function call to the stream for the current node.
-        A leading comma is added automatically.  The extra keyword
-        arguments may not include python keywords otherwise a syntax
-        error could occur.  The extra keyword arguments should be given
-        as python dict.
-        """
-        # if any of the given keyword arguments is a python keyword
-        # we have to make sure that no invalid call is created.
-        kwarg_workaround = any(
-            is_python_keyword(t.cast(str, k))
-            for k in chain((x.key for x in node.kwargs), extra_kwargs or ())
-        )
-
-        for arg in node.args:
-            self.write(", ")
-            self.visit(arg, frame)
-
-        if not kwarg_workaround:
-            for kwarg in node.kwargs:
-                self.write(", ")
-                self.visit(kwarg, frame)
-            if extra_kwargs is not None:
-                for key, value in extra_kwargs.items():
-                    self.write(f", {key}={value}")
-        if node.dyn_args:
-            self.write(", *")
-            self.visit(node.dyn_args, frame)
-
-        if kwarg_workaround:
-            if node.dyn_kwargs is not None:
-                self.write(", **dict({")
-            else:
-                self.write(", **{")
-            for kwarg in node.kwargs:
-                self.write(f"{kwarg.key!r}: ")
-                self.visit(kwarg.value, frame)
-                self.write(", ")
-            if extra_kwargs is not None:
-                for key, value in extra_kwargs.items():
-                    self.write(f"{key!r}: {value}, ")
-            if node.dyn_kwargs is not None:
-                self.write("}, **")
-                self.visit(node.dyn_kwargs, frame)
-                self.write(")")
-            else:
-                self.write("}")
-
-        elif node.dyn_kwargs is not None:
-            self.write(", **")
-            self.visit(node.dyn_kwargs, frame)
-
-    def pull_dependencies(self, nodes: t.Iterable[nodes.Node]) -> None:
-        """Find all filter and test names used in the template and
-        assign them to variables in the compiled namespace. Checking
-        that the names are registered with the environment is done when
-        compiling the Filter and Test nodes. If the node is in an If or
-        CondExpr node, the check is done at runtime instead.
-
-        .. versionchanged:: 3.0
-            Filters and tests in If and CondExpr nodes are checked at
-            runtime instead of compile time.
-        """
-        visitor = DependencyFinderVisitor()
-
-        for node in nodes:
-            visitor.visit(node)
-
-        for id_map, names, dependency in (self.filters, visitor.filters, "filters"), (
-            self.tests,
-            visitor.tests,
-            "tests",
-        ):
-            for name in sorted(names):
-                if name not in id_map:
-                    id_map[name] = self.temporary_identifier()
-
-                # add check during runtime that dependencies used inside of executed
-                # blocks are defined, as this step may be skipped during compile time
-                self.writeline("try:")
-                self.indent()
-                self.writeline(f"{id_map[name]} = environment.{dependency}[{name!r}]")
-                self.outdent()
-                self.writeline("except KeyError:")
-                self.indent()
-                self.writeline("@internalcode")
-                self.writeline(f"def {id_map[name]}(*unused):")
-                self.indent()
-                self.writeline(
-                    f'raise TemplateRuntimeError("No {dependency[:-1]}'
-                    f' named {name!r} found.")'
-                )
-                self.outdent()
-                self.outdent()
-
-    def enter_frame(self, frame: Frame) -> None:
-        undefs = []
-        for target, (action, param) in frame.symbols.loads.items():
-            if action == VAR_LOAD_PARAMETER:
-                pass
-            elif action == VAR_LOAD_RESOLVE:
-                self.writeline(f"{target} = {self.get_resolve_func()}({param!r})")
-            elif action == VAR_LOAD_ALIAS:
-                self.writeline(f"{target} = {param}")
-            elif action == VAR_LOAD_UNDEFINED:
-                undefs.append(target)
-            else:
-                raise NotImplementedError("unknown load instruction")
-        if undefs:
-            self.writeline(f"{' = '.join(undefs)} = missing")
-
-    def leave_frame(self, frame: Frame, with_python_scope: bool = False) -> None:
-        if not with_python_scope:
-            undefs = []
-            for target in frame.symbols.loads:
-                undefs.append(target)
-            if undefs:
-                self.writeline(f"{' = '.join(undefs)} = missing")
-
-    def choose_async(self, async_value: str = "async ", sync_value: str = "") -> str:
-        return async_value if self.environment.is_async else sync_value
-
-    def func(self, name: str) -> str:
-        return f"{self.choose_async()}def {name}"
-
-    def macro_body(
-        self, node: t.Union[nodes.Macro, nodes.CallBlock], frame: Frame
-    ) -> t.Tuple[Frame, MacroRef]:
-        """Dump the function def of a macro or call block."""
-        frame = frame.inner()
-        frame.symbols.analyze_node(node)
-        macro_ref = MacroRef(node)
-
-        explicit_caller = None
-        skip_special_params = set()
-        args = []
-
-        for idx, arg in enumerate(node.args):
-            if arg.name == "caller":
-                explicit_caller = idx
-            if arg.name in ("kwargs", "varargs"):
-                skip_special_params.add(arg.name)
-            args.append(frame.symbols.ref(arg.name))
-
-        undeclared = find_undeclared(node.body, ("caller", "kwargs", "varargs"))
-
-        if "caller" in undeclared:
-            # In older Jinja versions there was a bug that allowed caller
-            # to retain the special behavior even if it was mentioned in
-            # the argument list.  However thankfully this was only really
-            # working if it was the last argument.  So we are explicitly
-            # checking this now and error out if it is anywhere else in
-            # the argument list.
-            if explicit_caller is not None:
-                try:
-                    node.defaults[explicit_caller - len(node.args)]
-                except IndexError:
-                    self.fail(
-                        "When defining macros or call blocks the "
-                        'special "caller" argument must be omitted '
-                        "or be given a default.",
-                        node.lineno,
-                    )
-            else:
-                args.append(frame.symbols.declare_parameter("caller"))
-            macro_ref.accesses_caller = True
-        if "kwargs" in undeclared and "kwargs" not in skip_special_params:
-            args.append(frame.symbols.declare_parameter("kwargs"))
-            macro_ref.accesses_kwargs = True
-        if "varargs" in undeclared and "varargs" not in skip_special_params:
-            args.append(frame.symbols.declare_parameter("varargs"))
-            macro_ref.accesses_varargs = True
-
-        # macros are delayed, they never require output checks
-        frame.require_output_check = False
-        frame.symbols.analyze_node(node)
-        self.writeline(f"{self.func('macro')}({', '.join(args)}):", node)
-        self.indent()
-
-        self.buffer(frame)
-        self.enter_frame(frame)
-
-        self.push_parameter_definitions(frame)
-        for idx, arg in enumerate(node.args):
-            ref = frame.symbols.ref(arg.name)
-            self.writeline(f"if {ref} is missing:")
-            self.indent()
-            try:
-                default = node.defaults[idx - len(node.args)]
-            except IndexError:
-                self.writeline(
-                    f'{ref} = undefined("parameter {arg.name!r} was not provided",'
-                    f" name={arg.name!r})"
-                )
-            else:
-                self.writeline(f"{ref} = ")
-                self.visit(default, frame)
-            self.mark_parameter_stored(ref)
-            self.outdent()
-        self.pop_parameter_definitions()
-
-        self.blockvisit(node.body, frame)
-        self.return_buffer_contents(frame, force_unescaped=True)
-        self.leave_frame(frame, with_python_scope=True)
-        self.outdent()
-
-        return frame, macro_ref
-
-    def macro_def(self, macro_ref: MacroRef, frame: Frame) -> None:
-        """Dump the macro definition for the def created by macro_body."""
-        arg_tuple = ", ".join(repr(x.name) for x in macro_ref.node.args)
-        name = getattr(macro_ref.node, "name", None)
-        if len(macro_ref.node.args) == 1:
-            arg_tuple += ","
-        self.write(
-            f"Macro(environment, macro, {name!r}, ({arg_tuple}),"
-            f" {macro_ref.accesses_kwargs!r}, {macro_ref.accesses_varargs!r},"
-            f" {macro_ref.accesses_caller!r}, context.eval_ctx.autoescape)"
-        )
-
-    def position(self, node: nodes.Node) -> str:
-        """Return a human readable position for the node."""
-        rv = f"line {node.lineno}"
-        if self.name is not None:
-            rv = f"{rv} in {self.name!r}"
-        return rv
-
-    def dump_local_context(self, frame: Frame) -> str:
-        items_kv = ", ".join(
-            f"{name!r}: {target}"
-            for name, target in frame.symbols.dump_stores().items()
-        )
-        return f"{{{items_kv}}}"
-
-    def write_commons(self) -> None:
-        """Writes a common preamble that is used by root and block functions.
-        Primarily this sets up common local helpers and enforces a generator
-        through a dead branch.
-        """
-        self.writeline("resolve = context.resolve_or_missing")
-        self.writeline("undefined = environment.undefined")
-        # always use the standard Undefined class for the implicit else of
-        # conditional expressions
-        self.writeline("cond_expr_undefined = Undefined")
-        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."""
-        self._param_def_block.pop()
-
-    def mark_parameter_stored(self, target: str) -> None:
-        """Marks a parameter in the current parameter definitions as stored.
-        This will skip the enforced undefined checks.
-        """
-        if self._param_def_block:
-            self._param_def_block[-1].discard(target)
-
-    def push_context_reference(self, target: str) -> None:
-        self._context_reference_stack.append(target)
-
-    def pop_context_reference(self) -> None:
-        self._context_reference_stack.pop()
-
-    def get_context_ref(self) -> str:
-        return self._context_reference_stack[-1]
-
-    def get_resolve_func(self) -> str:
-        target = self._context_reference_stack[-1]
-        if target == "context":
-            return "resolve"
-        return f"{target}.resolve"
-
-    def derive_context(self, frame: Frame) -> str:
-        return f"{self.get_context_ref()}.derived({self.dump_local_context(frame)})"
-
-    def parameter_is_undeclared(self, target: str) -> bool:
-        """Checks if a given target is an undeclared parameter."""
-        if not self._param_def_block:
-            return False
-        return target in self._param_def_block[-1]
-
-    def push_assign_tracking(self) -> None:
-        """Pushes a new layer for assignment tracking."""
-        self._assign_stack.append(set())
-
-    def pop_assign_tracking(self, frame: Frame) -> None:
-        """Pops the topmost level for assignment tracking and updates the
-        context variables if necessary.
-        """
-        vars = self._assign_stack.pop()
-        if (
-            not frame.block_frame
-            and not frame.loop_frame
-            and not frame.toplevel
-            or not vars
-        ):
-            return
-        public_names = [x for x in vars if x[:1] != "_"]
-        if len(vars) == 1:
-            name = next(iter(vars))
-            ref = frame.symbols.ref(name)
-            if frame.loop_frame:
-                self.writeline(f"_loop_vars[{name!r}] = {ref}")
-                return
-            if frame.block_frame:
-                self.writeline(f"_block_vars[{name!r}] = {ref}")
-                return
-            self.writeline(f"context.vars[{name!r}] = {ref}")
-        else:
-            if frame.loop_frame:
-                self.writeline("_loop_vars.update({")
-            elif frame.block_frame:
-                self.writeline("_block_vars.update({")
-            else:
-                self.writeline("context.vars.update({")
-            for idx, name in enumerate(vars):
-                if idx:
-                    self.write(", ")
-                ref = frame.symbols.ref(name)
-                self.write(f"{name!r}: {ref}")
-            self.write("})")
-        if not frame.block_frame and not frame.loop_frame and public_names:
-            if len(public_names) == 1:
-                self.writeline(f"context.exported_vars.add({public_names[0]!r})")
-            else:
-                names_str = ", ".join(map(repr, public_names))
-                self.writeline(f"context.exported_vars.update(({names_str}))")
-
-    # -- Statement Visitors
-
-    def visit_Template(
-        self, node: nodes.Template, frame: t.Optional[Frame] = None
-    ) -> None:
-        assert frame is None, "no root frame allowed"
-        eval_ctx = EvalContext(self.environment, self.name)
-
-        from .runtime import exported, async_exported
-
-        if self.environment.is_async:
-            exported_names = sorted(exported + async_exported)
-        else:
-            exported_names = sorted(exported)
-
-        self.writeline("from __future__ import generator_stop")  # Python < 3.7
-        self.writeline("from jinja2.runtime import " + ", ".join(exported_names))
-
-        # if we want a deferred initialization we cannot move the
-        # environment into a local name
-        envenv = "" if self.defer_init else ", environment=environment"
-
-        # do we have an extends tag at all?  If not, we can save some
-        # overhead by just not processing any inheritance code.
-        have_extends = node.find(nodes.Extends) is not None
-
-        # find all blocks
-        for block in node.find_all(nodes.Block):
-            if block.name in self.blocks:
-                self.fail(f"block {block.name!r} defined twice", block.lineno)
-            self.blocks[block.name] = block
-
-        # find all imports and import them
-        for import_ in node.find_all(nodes.ImportedName):
-            if import_.importname not in self.import_aliases:
-                imp = import_.importname
-                self.import_aliases[imp] = alias = self.temporary_identifier()
-                if "." in imp:
-                    module, obj = imp.rsplit(".", 1)
-                    self.writeline(f"from {module} import {obj} as {alias}")
-                else:
-                    self.writeline(f"import {imp} as {alias}")
-
-        # add the load name
-        self.writeline(f"name = {self.name!r}")
-
-        # generate the root render function.
-        self.writeline(
-            f"{self.func('root')}(context, missing=missing{envenv}):", extra=1
-        )
-        self.indent()
-        self.write_commons()
-
-        # process the root
-        frame = Frame(eval_ctx)
-        if "self" in find_undeclared(node.body, ("self",)):
-            ref = frame.symbols.declare_parameter("self")
-            self.writeline(f"{ref} = TemplateReference(context)")
-        frame.symbols.analyze_node(node)
-        frame.toplevel = frame.rootlevel = True
-        frame.require_output_check = have_extends and not self.has_known_extends
-        if have_extends:
-            self.writeline("parent_template = None")
-        self.enter_frame(frame)
-        self.pull_dependencies(node.body)
-        self.blockvisit(node.body, frame)
-        self.leave_frame(frame, with_python_scope=True)
-        self.outdent()
-
-        # make sure that the parent root is called.
-        if have_extends:
-            if not self.has_known_extends:
-                self.indent()
-                self.writeline("if parent_template is not None:")
-            self.indent()
-            if not self.environment.is_async:
-                self.writeline("yield from parent_template.root_render_func(context)")
-            else:
-                self.writeline(
-                    "async for event in parent_template.root_render_func(context):"
-                )
-                self.indent()
-                self.writeline("yield event")
-                self.outdent()
-            self.outdent(1 + (not self.has_known_extends))
-
-        # at this point we now have the blocks collected and can visit them too.
-        for name, block in self.blocks.items():
-            self.writeline(
-                f"{self.func('block_' + name)}(context, missing=missing{envenv}):",
-                block,
-                1,
-            )
-            self.indent()
-            self.write_commons()
-            # It's important that we do not make this frame a child of the
-            # toplevel template.  This would cause a variety of
-            # interesting issues with identifier tracking.
-            block_frame = Frame(eval_ctx)
-            block_frame.block_frame = True
-            undeclared = find_undeclared(block.body, ("self", "super"))
-            if "self" in undeclared:
-                ref = block_frame.symbols.declare_parameter("self")
-                self.writeline(f"{ref} = TemplateReference(context)")
-            if "super" in undeclared:
-                ref = block_frame.symbols.declare_parameter("super")
-                self.writeline(f"{ref} = context.super({name!r}, block_{name})")
-            block_frame.symbols.analyze_node(block)
-            block_frame.block = name
-            self.writeline("_block_vars = {}")
-            self.enter_frame(block_frame)
-            self.pull_dependencies(block.body)
-            self.blockvisit(block.body, block_frame)
-            self.leave_frame(block_frame, with_python_scope=True)
-            self.outdent()
-
-        blocks_kv_str = ", ".join(f"{x!r}: block_{x}" for x in self.blocks)
-        self.writeline(f"blocks = {{{blocks_kv_str}}}", extra=1)
-        debug_kv_str = "&".join(f"{k}={v}" for k, v in self.debug_info)
-        self.writeline(f"debug_info = {debug_kv_str!r}")
-
-    def visit_Block(self, node: nodes.Block, frame: Frame) -> None:
-        """Call a block and register it for the template."""
-        level = 0
-        if frame.toplevel:
-            # if we know that we are a child template, there is no need to
-            # check if we are one
-            if self.has_known_extends:
-                return
-            if self.extends_so_far > 0:
-                self.writeline("if parent_template is None:")
-                self.indent()
-                level += 1
-
-        if node.scoped:
-            context = self.derive_context(frame)
-        else:
-            context = self.get_context_ref()
-
-        if node.required:
-            self.writeline(f"if len(context.blocks[{node.name!r}]) <= 1:", node)
-            self.indent()
-            self.writeline(
-                f'raise TemplateRuntimeError("Required block {node.name!r} not found")',
-                node,
-            )
-            self.outdent()
-
-        if not self.environment.is_async and frame.buffer is None:
-            self.writeline(
-                f"yield from context.blocks[{node.name!r}][0]({context})", node
-            )
-        else:
-            self.writeline(
-                f"{self.choose_async()}for event in"
-                f" context.blocks[{node.name!r}][0]({context}):",
-                node,
-            )
-            self.indent()
-            self.simple_write("event", frame)
-            self.outdent()
-
-        self.outdent(level)
-
-    def visit_Extends(self, node: nodes.Extends, frame: Frame) -> None:
-        """Calls the extender."""
-        if not frame.toplevel:
-            self.fail("cannot use extend from a non top-level scope", node.lineno)
-
-        # if the number of extends statements in general is zero so
-        # far, we don't have to add a check if something extended
-        # the template before this one.
-        if self.extends_so_far > 0:
-
-            # if we have a known extends we just add a template runtime
-            # error into the generated code.  We could catch that at compile
-            # time too, but i welcome it not to confuse users by throwing the
-            # same error at different times just "because we can".
-            if not self.has_known_extends:
-                self.writeline("if parent_template is not None:")
-                self.indent()
-            self.writeline('raise TemplateRuntimeError("extended multiple times")')
-
-            # if we have a known extends already we don't need that code here
-            # as we know that the template execution will end here.
-            if self.has_known_extends:
-                raise CompilerExit()
-            else:
-                self.outdent()
-
-        self.writeline("parent_template = environment.get_template(", node)
-        self.visit(node.template, frame)
-        self.write(f", {self.name!r})")
-        self.writeline("for name, parent_block in parent_template.blocks.items():")
-        self.indent()
-        self.writeline("context.blocks.setdefault(name, []).append(parent_block)")
-        self.outdent()
-
-        # if this extends statement was in the root level we can take
-        # advantage of that information and simplify the generated code
-        # in the top level from this point onwards
-        if frame.rootlevel:
-            self.has_known_extends = True
-
-        # and now we have one more
-        self.extends_so_far += 1
-
-    def visit_Include(self, node: nodes.Include, frame: Frame) -> None:
-        """Handles includes."""
-        if node.ignore_missing:
-            self.writeline("try:")
-            self.indent()
-
-        func_name = "get_or_select_template"
-        if isinstance(node.template, nodes.Const):
-            if isinstance(node.template.value, str):
-                func_name = "get_template"
-            elif isinstance(node.template.value, (tuple, list)):
-                func_name = "select_template"
-        elif isinstance(node.template, (nodes.Tuple, nodes.List)):
-            func_name = "select_template"
-
-        self.writeline(f"template = environment.{func_name}(", node)
-        self.visit(node.template, frame)
-        self.write(f", {self.name!r})")
-        if node.ignore_missing:
-            self.outdent()
-            self.writeline("except TemplateNotFound:")
-            self.indent()
-            self.writeline("pass")
-            self.outdent()
-            self.writeline("else:")
-            self.indent()
-
-        skip_event_yield = False
-        if node.with_context:
-            self.writeline(
-                f"{self.choose_async()}for event in template.root_render_func("
-                "template.new_context(context.get_all(), True,"
-                f" {self.dump_local_context(frame)})):"
-            )
-        elif self.environment.is_async:
-            self.writeline(
-                "for event in (await template._get_default_module_async())"
-                "._body_stream:"
-            )
-        else:
-            self.writeline("yield from template._get_default_module()._body_stream")
-            skip_event_yield = True
-
-        if not skip_event_yield:
-            self.indent()
-            self.simple_write("event", frame)
-            self.outdent()
-
-        if node.ignore_missing:
-            self.outdent()
-
-    def _import_common(
-        self, node: t.Union[nodes.Import, nodes.FromImport], frame: Frame
-    ) -> None:
-        self.write(f"{self.choose_async('await ')}environment.get_template(")
-        self.visit(node.template, frame)
-        self.write(f", {self.name!r}).")
-
-        if node.with_context:
-            f_name = f"make_module{self.choose_async('_async')}"
-            self.write(
-                f"{f_name}(context.get_all(), True, {self.dump_local_context(frame)})"
-            )
-        else:
-            self.write(f"_get_default_module{self.choose_async('_async')}(context)")
-
-    def visit_Import(self, node: nodes.Import, frame: Frame) -> None:
-        """Visit regular imports."""
-        self.writeline(f"{frame.symbols.ref(node.target)} = ", node)
-        if frame.toplevel:
-            self.write(f"context.vars[{node.target!r}] = ")
-
-        self._import_common(node, frame)
-
-        if frame.toplevel and not node.target.startswith("_"):
-            self.writeline(f"context.exported_vars.discard({node.target!r})")
-
-    def visit_FromImport(self, node: nodes.FromImport, frame: Frame) -> None:
-        """Visit named imports."""
-        self.newline(node)
-        self.write("included_template = ")
-        self._import_common(node, frame)
-        var_names = []
-        discarded_names = []
-        for name in node.names:
-            if isinstance(name, tuple):
-                name, alias = name
-            else:
-                alias = name
-            self.writeline(
-                f"{frame.symbols.ref(alias)} ="
-                f" getattr(included_template, {name!r}, missing)"
-            )
-            self.writeline(f"if {frame.symbols.ref(alias)} is missing:")
-            self.indent()
-            message = (
-                "the template {included_template.__name__!r}"
-                f" (imported on {self.position(node)})"
-                f" does not export the requested name {name!r}"
-            )
-            self.writeline(
-                f"{frame.symbols.ref(alias)} = undefined(f{message!r}, name={name!r})"
-            )
-            self.outdent()
-            if frame.toplevel:
-                var_names.append(alias)
-                if not alias.startswith("_"):
-                    discarded_names.append(alias)
-
-        if var_names:
-            if len(var_names) == 1:
-                name = var_names[0]
-                self.writeline(f"context.vars[{name!r}] = {frame.symbols.ref(name)}")
-            else:
-                names_kv = ", ".join(
-                    f"{name!r}: {frame.symbols.ref(name)}" for name in var_names
-                )
-                self.writeline(f"context.vars.update({{{names_kv}}})")
-        if discarded_names:
-            if len(discarded_names) == 1:
-                self.writeline(f"context.exported_vars.discard({discarded_names[0]!r})")
-            else:
-                names_str = ", ".join(map(repr, discarded_names))
-                self.writeline(
-                    f"context.exported_vars.difference_update(({names_str}))"
-                )
-
-    def visit_For(self, node: nodes.For, frame: Frame) -> None:
-        loop_frame = frame.inner()
-        loop_frame.loop_frame = True
-        test_frame = frame.inner()
-        else_frame = frame.inner()
-
-        # try to figure out if we have an extended loop.  An extended loop
-        # is necessary if the loop is in recursive mode if the special loop
-        # variable is accessed in the body if the body is a scoped block.
-        extended_loop = (
-            node.recursive
-            or "loop"
-            in find_undeclared(node.iter_child_nodes(only=("body",)), ("loop",))
-            or any(block.scoped for block in node.find_all(nodes.Block))
-        )
-
-        loop_ref = None
-        if extended_loop:
-            loop_ref = loop_frame.symbols.declare_parameter("loop")
-
-        loop_frame.symbols.analyze_node(node, for_branch="body")
-        if node.else_:
-            else_frame.symbols.analyze_node(node, for_branch="else")
-
-        if node.test:
-            loop_filter_func = self.temporary_identifier()
-            test_frame.symbols.analyze_node(node, for_branch="test")
-            self.writeline(f"{self.func(loop_filter_func)}(fiter):", node.test)
-            self.indent()
-            self.enter_frame(test_frame)
-            self.writeline(self.choose_async("async for ", "for "))
-            self.visit(node.target, loop_frame)
-            self.write(" in ")
-            self.write(self.choose_async("auto_aiter(fiter)", "fiter"))
-            self.write(":")
-            self.indent()
-            self.writeline("if ", node.test)
-            self.visit(node.test, test_frame)
-            self.write(":")
-            self.indent()
-            self.writeline("yield ")
-            self.visit(node.target, loop_frame)
-            self.outdent(3)
-            self.leave_frame(test_frame, with_python_scope=True)
-
-        # if we don't have an recursive loop we have to find the shadowed
-        # variables at that point.  Because loops can be nested but the loop
-        # variable is a special one we have to enforce aliasing for it.
-        if node.recursive:
-            self.writeline(
-                f"{self.func('loop')}(reciter, loop_render_func, depth=0):", node
-            )
-            self.indent()
-            self.buffer(loop_frame)
-
-            # Use the same buffer for the else frame
-            else_frame.buffer = loop_frame.buffer
-
-        # make sure the loop variable is a special one and raise a template
-        # assertion error if a loop tries to write to loop
-        if extended_loop:
-            self.writeline(f"{loop_ref} = missing")
-
-        for name in node.find_all(nodes.Name):
-            if name.ctx == "store" and name.name == "loop":
-                self.fail(
-                    "Can't assign to special loop variable in for-loop target",
-                    name.lineno,
-                )
-
-        if node.else_:
-            iteration_indicator = self.temporary_identifier()
-            self.writeline(f"{iteration_indicator} = 1")
-
-        self.writeline(self.choose_async("async for ", "for "), node)
-        self.visit(node.target, loop_frame)
-        if extended_loop:
-            self.write(f", {loop_ref} in {self.choose_async('Async')}LoopContext(")
-        else:
-            self.write(" in ")
-
-        if node.test:
-            self.write(f"{loop_filter_func}(")
-        if node.recursive:
-            self.write("reciter")
-        else:
-            if self.environment.is_async and not extended_loop:
-                self.write("auto_aiter(")
-            self.visit(node.iter, frame)
-            if self.environment.is_async and not extended_loop:
-                self.write(")")
-        if node.test:
-            self.write(")")
-
-        if node.recursive:
-            self.write(", undefined, loop_render_func, depth):")
-        else:
-            self.write(", undefined):" if extended_loop else ":")
-
-        self.indent()
-        self.enter_frame(loop_frame)
-
-        self.writeline("_loop_vars = {}")
-        self.blockvisit(node.body, loop_frame)
-        if node.else_:
-            self.writeline(f"{iteration_indicator} = 0")
-        self.outdent()
-        self.leave_frame(
-            loop_frame, with_python_scope=node.recursive and not node.else_
-        )
-
-        if node.else_:
-            self.writeline(f"if {iteration_indicator}:")
-            self.indent()
-            self.enter_frame(else_frame)
-            self.blockvisit(node.else_, else_frame)
-            self.leave_frame(else_frame)
-            self.outdent()
-
-        # if the node was recursive we have to return the buffer contents
-        # and start the iteration code
-        if node.recursive:
-            self.return_buffer_contents(loop_frame)
-            self.outdent()
-            self.start_write(frame, node)
-            self.write(f"{self.choose_async('await ')}loop(")
-            if self.environment.is_async:
-                self.write("auto_aiter(")
-            self.visit(node.iter, frame)
-            if self.environment.is_async:
-                self.write(")")
-            self.write(", loop)")
-            self.end_write(frame)
-
-        # at the end of the iteration, clear any assignments made in the
-        # loop from the top level
-        if self._assign_stack:
-            self._assign_stack[-1].difference_update(loop_frame.symbols.stores)
-
-    def visit_If(self, node: nodes.If, frame: Frame) -> None:
-        if_frame = frame.soft()
-        self.writeline("if ", node)
-        self.visit(node.test, if_frame)
-        self.write(":")
-        self.indent()
-        self.blockvisit(node.body, if_frame)
-        self.outdent()
-        for elif_ in node.elif_:
-            self.writeline("elif ", elif_)
-            self.visit(elif_.test, if_frame)
-            self.write(":")
-            self.indent()
-            self.blockvisit(elif_.body, if_frame)
-            self.outdent()
-        if node.else_:
-            self.writeline("else:")
-            self.indent()
-            self.blockvisit(node.else_, if_frame)
-            self.outdent()
-
-    def visit_Macro(self, node: nodes.Macro, frame: Frame) -> None:
-        macro_frame, macro_ref = self.macro_body(node, frame)
-        self.newline()
-        if frame.toplevel:
-            if not node.name.startswith("_"):
-                self.write(f"context.exported_vars.add({node.name!r})")
-            self.writeline(f"context.vars[{node.name!r}] = ")
-        self.write(f"{frame.symbols.ref(node.name)} = ")
-        self.macro_def(macro_ref, macro_frame)
-
-    def visit_CallBlock(self, node: nodes.CallBlock, frame: Frame) -> None:
-        call_frame, macro_ref = self.macro_body(node, frame)
-        self.writeline("caller = ")
-        self.macro_def(macro_ref, call_frame)
-        self.start_write(frame, node)
-        self.visit_Call(node.call, frame, forward_caller=True)
-        self.end_write(frame)
-
-    def visit_FilterBlock(self, node: nodes.FilterBlock, frame: Frame) -> None:
-        filter_frame = frame.inner()
-        filter_frame.symbols.analyze_node(node)
-        self.enter_frame(filter_frame)
-        self.buffer(filter_frame)
-        self.blockvisit(node.body, filter_frame)
-        self.start_write(frame, node)
-        self.visit_Filter(node.filter, filter_frame)
-        self.end_write(frame)
-        self.leave_frame(filter_frame)
-
-    def visit_With(self, node: nodes.With, frame: Frame) -> None:
-        with_frame = frame.inner()
-        with_frame.symbols.analyze_node(node)
-        self.enter_frame(with_frame)
-        for target, expr in zip(node.targets, node.values):
-            self.newline()
-            self.visit(target, with_frame)
-            self.write(" = ")
-            self.visit(expr, frame)
-        self.blockvisit(node.body, with_frame)
-        self.leave_frame(with_frame)
-
-    def visit_ExprStmt(self, node: nodes.ExprStmt, frame: Frame) -> None:
-        self.newline(node)
-        self.visit(node.node, frame)
-
-    class _FinalizeInfo(t.NamedTuple):
-        const: t.Optional[t.Callable[..., str]]
-        src: t.Optional[str]
-
-    @staticmethod
-    def _default_finalize(value: t.Any) -> t.Any:
-        """The default finalize function if the environment isn't
-        configured with one. Or, if the environment has one, this is
-        called on that function's output for constants.
-        """
-        return str(value)
-
-    _finalize: t.Optional[_FinalizeInfo] = None
-
-    def _make_finalize(self) -> _FinalizeInfo:
-        """Build the finalize function to be used on constants and at
-        runtime. Cached so it's only created once for all output nodes.
-
-        Returns a ``namedtuple`` with the following attributes:
-
-        ``const``
-            A function to finalize constant data at compile time.
-
-        ``src``
-            Source code to output around nodes to be evaluated at
-            runtime.
-        """
-        if self._finalize is not None:
-            return self._finalize
-
-        finalize: t.Optional[t.Callable[..., t.Any]]
-        finalize = default = self._default_finalize
-        src = None
-
-        if self.environment.finalize:
-            src = "environment.finalize("
-            env_finalize = self.environment.finalize
-            pass_arg = {
-                _PassArg.context: "context",
-                _PassArg.eval_context: "context.eval_ctx",
-                _PassArg.environment: "environment",
-            }.get(
-                _PassArg.from_obj(env_finalize)  # type: ignore
-            )
-            finalize = None
-
-            if pass_arg is None:
-
-                def finalize(value: t.Any) -> t.Any:
-                    return default(env_finalize(value))
-
-            else:
-                src = f"{src}{pass_arg}, "
-
-                if pass_arg == "environment":
-
-                    def finalize(value: t.Any) -> t.Any:
-                        return default(env_finalize(self.environment, value))
-
-        self._finalize = self._FinalizeInfo(finalize, src)
-        return self._finalize
-
-    def _output_const_repr(self, group: t.Iterable[t.Any]) -> str:
-        """Given a group of constant values converted from ``Output``
-        child nodes, produce a string to write to the template module
-        source.
-        """
-        return repr(concat(group))
-
-    def _output_child_to_const(
-        self, node: nodes.Expr, frame: Frame, finalize: _FinalizeInfo
-    ) -> str:
-        """Try to optimize a child of an ``Output`` node by trying to
-        convert it to constant, finalized data at compile time.
-
-        If :exc:`Impossible` is raised, the node is not constant and
-        will be evaluated at runtime. Any other exception will also be
-        evaluated at runtime for easier debugging.
-        """
-        const = node.as_const(frame.eval_ctx)
-
-        if frame.eval_ctx.autoescape:
-            const = escape(const)
-
-        # Template data doesn't go through finalize.
-        if isinstance(node, nodes.TemplateData):
-            return str(const)
-
-        return finalize.const(const)  # type: ignore
-
-    def _output_child_pre(
-        self, node: nodes.Expr, frame: Frame, finalize: _FinalizeInfo
-    ) -> None:
-        """Output extra source code before visiting a child of an
-        ``Output`` node.
-        """
-        if frame.eval_ctx.volatile:
-            self.write("(escape if context.eval_ctx.autoescape else str)(")
-        elif frame.eval_ctx.autoescape:
-            self.write("escape(")
-        else:
-            self.write("str(")
-
-        if finalize.src is not None:
-            self.write(finalize.src)
-
-    def _output_child_post(
-        self, node: nodes.Expr, frame: Frame, finalize: _FinalizeInfo
-    ) -> None:
-        """Output extra source code after visiting a child of an
-        ``Output`` node.
-        """
-        self.write(")")
-
-        if finalize.src is not None:
-            self.write(")")
-
-    def visit_Output(self, node: nodes.Output, frame: Frame) -> None:
-        # If an extends is active, don't render outside a block.
-        if frame.require_output_check:
-            # A top-level extends is known to exist at compile time.
-            if self.has_known_extends:
-                return
-
-            self.writeline("if parent_template is None:")
-            self.indent()
-
-        finalize = self._make_finalize()
-        body: t.List[t.Union[t.List[t.Any], nodes.Expr]] = []
-
-        # Evaluate constants at compile time if possible. Each item in
-        # body will be either a list of static data or a node to be
-        # evaluated at runtime.
-        for child in node.nodes:
-            try:
-                if not (
-                    # If the finalize function requires runtime context,
-                    # constants can't be evaluated at compile time.
-                    finalize.const
-                    # Unless it's basic template data that won't be
-                    # finalized anyway.
-                    or isinstance(child, nodes.TemplateData)
-                ):
-                    raise nodes.Impossible()
-
-                const = self._output_child_to_const(child, frame, finalize)
-            except (nodes.Impossible, Exception):
-                # The node was not constant and needs to be evaluated at
-                # runtime. Or another error was raised, which is easier
-                # to debug at runtime.
-                body.append(child)
-                continue
-
-            if body and isinstance(body[-1], list):
-                body[-1].append(const)
-            else:
-                body.append([const])
-
-        if frame.buffer is not None:
-            if len(body) == 1:
-                self.writeline(f"{frame.buffer}.append(")
-            else:
-                self.writeline(f"{frame.buffer}.extend((")
-
-            self.indent()
-
-        for item in body:
-            if isinstance(item, list):
-                # A group of constant data to join and output.
-                val = self._output_const_repr(item)
-
-                if frame.buffer is None:
-                    self.writeline("yield " + val)
-                else:
-                    self.writeline(val + ",")
-            else:
-                if frame.buffer is None:
-                    self.writeline("yield ", item)
-                else:
-                    self.newline(item)
-
-                # A node to be evaluated at runtime.
-                self._output_child_pre(item, frame, finalize)
-                self.visit(item, frame)
-                self._output_child_post(item, frame, finalize)
-
-                if frame.buffer is not None:
-                    self.write(",")
-
-        if frame.buffer is not None:
-            self.outdent()
-            self.writeline(")" if len(body) == 1 else "))")
-
-        if frame.require_output_check:
-            self.outdent()
-
-    def visit_Assign(self, node: nodes.Assign, frame: Frame) -> None:
-        self.push_assign_tracking()
-        self.newline(node)
-        self.visit(node.target, frame)
-        self.write(" = ")
-        self.visit(node.node, frame)
-        self.pop_assign_tracking(frame)
-
-    def visit_AssignBlock(self, node: nodes.AssignBlock, frame: Frame) -> None:
-        self.push_assign_tracking()
-        block_frame = frame.inner()
-        # This is a special case.  Since a set block always captures we
-        # will disable output checks.  This way one can use set blocks
-        # toplevel even in extended templates.
-        block_frame.require_output_check = False
-        block_frame.symbols.analyze_node(node)
-        self.enter_frame(block_frame)
-        self.buffer(block_frame)
-        self.blockvisit(node.body, block_frame)
-        self.newline(node)
-        self.visit(node.target, frame)
-        self.write(" = (Markup if context.eval_ctx.autoescape else identity)(")
-        if node.filter is not None:
-            self.visit_Filter(node.filter, block_frame)
-        else:
-            self.write(f"concat({block_frame.buffer})")
-        self.write(")")
-        self.pop_assign_tracking(frame)
-        self.leave_frame(block_frame)
-
-    # -- Expression Visitors
-
-    def visit_Name(self, node: nodes.Name, frame: Frame) -> None:
-        if node.ctx == "store" and (
-            frame.toplevel or frame.loop_frame or frame.block_frame
-        ):
-            if self._assign_stack:
-                self._assign_stack[-1].add(node.name)
-        ref = frame.symbols.ref(node.name)
-
-        # If we are looking up a variable we might have to deal with the
-        # case where it's undefined.  We can skip that case if the load
-        # instruction indicates a parameter which are always defined.
-        if node.ctx == "load":
-            load = frame.symbols.find_load(ref)
-            if not (
-                load is not None
-                and load[0] == VAR_LOAD_PARAMETER
-                and not self.parameter_is_undeclared(ref)
-            ):
-                self.write(
-                    f"(undefined(name={node.name!r}) if {ref} is missing else {ref})"
-                )
-                return
-
-        self.write(ref)
-
-    def visit_NSRef(self, node: nodes.NSRef, frame: Frame) -> None:
-        # NSRefs can only be used to store values; since they use the normal
-        # `foo.bar` notation they will be parsed as a normal attribute access
-        # when used anywhere but in a `set` context
-        ref = frame.symbols.ref(node.name)
-        self.writeline(f"if not isinstance({ref}, Namespace):")
-        self.indent()
-        self.writeline(
-            "raise TemplateRuntimeError"
-            '("cannot assign attribute on non-namespace object")'
-        )
-        self.outdent()
-        self.writeline(f"{ref}[{node.attr!r}]")
-
-    def visit_Const(self, node: nodes.Const, frame: Frame) -> None:
-        val = node.as_const(frame.eval_ctx)
-        if isinstance(val, float):
-            self.write(str(val))
-        else:
-            self.write(repr(val))
-
-    def visit_TemplateData(self, node: nodes.TemplateData, frame: Frame) -> None:
-        try:
-            self.write(repr(node.as_const(frame.eval_ctx)))
-        except nodes.Impossible:
-            self.write(
-                f"(Markup if context.eval_ctx.autoescape else identity)({node.data!r})"
-            )
-
-    def visit_Tuple(self, node: nodes.Tuple, frame: Frame) -> None:
-        self.write("(")
-        idx = -1
-        for idx, item in enumerate(node.items):
-            if idx:
-                self.write(", ")
-            self.visit(item, frame)
-        self.write(",)" if idx == 0 else ")")
-
-    def visit_List(self, node: nodes.List, frame: Frame) -> None:
-        self.write("[")
-        for idx, item in enumerate(node.items):
-            if idx:
-                self.write(", ")
-            self.visit(item, frame)
-        self.write("]")
-
-    def visit_Dict(self, node: nodes.Dict, frame: Frame) -> None:
-        self.write("{")
-        for idx, item in enumerate(node.items):
-            if idx:
-                self.write(", ")
-            self.visit(item.key, frame)
-            self.write(": ")
-            self.visit(item.value, frame)
-        self.write("}")
-
-    visit_Add = _make_binop("+")
-    visit_Sub = _make_binop("-")
-    visit_Mul = _make_binop("*")
-    visit_Div = _make_binop("/")
-    visit_FloorDiv = _make_binop("//")
-    visit_Pow = _make_binop("**")
-    visit_Mod = _make_binop("%")
-    visit_And = _make_binop("and")
-    visit_Or = _make_binop("or")
-    visit_Pos = _make_unop("+")
-    visit_Neg = _make_unop("-")
-    visit_Not = _make_unop("not ")
-
-    @optimizeconst
-    def visit_Concat(self, node: nodes.Concat, frame: Frame) -> None:
-        if frame.eval_ctx.volatile:
-            func_name = "(markup_join if context.eval_ctx.volatile else str_join)"
-        elif frame.eval_ctx.autoescape:
-            func_name = "markup_join"
-        else:
-            func_name = "str_join"
-        self.write(f"{func_name}((")
-        for arg in node.nodes:
-            self.visit(arg, frame)
-            self.write(", ")
-        self.write("))")
-
-    @optimizeconst
-    def visit_Compare(self, node: nodes.Compare, frame: Frame) -> None:
-        self.write("(")
-        self.visit(node.expr, frame)
-        for op in node.ops:
-            self.visit(op, frame)
-        self.write(")")
-
-    def visit_Operand(self, node: nodes.Operand, frame: Frame) -> None:
-        self.write(f" {operators[node.op]} ")
-        self.visit(node.expr, frame)
-
-    @optimizeconst
-    def visit_Getattr(self, node: nodes.Getattr, frame: Frame) -> None:
-        if self.environment.is_async:
-            self.write("(await auto_await(")
-
-        self.write("environment.getattr(")
-        self.visit(node.node, frame)
-        self.write(f", {node.attr!r})")
-
-        if self.environment.is_async:
-            self.write("))")
-
-    @optimizeconst
-    def visit_Getitem(self, node: nodes.Getitem, frame: Frame) -> None:
-        # slices bypass the environment getitem method.
-        if isinstance(node.arg, nodes.Slice):
-            self.visit(node.node, frame)
-            self.write("[")
-            self.visit(node.arg, frame)
-            self.write("]")
-        else:
-            if self.environment.is_async:
-                self.write("(await auto_await(")
-
-            self.write("environment.getitem(")
-            self.visit(node.node, frame)
-            self.write(", ")
-            self.visit(node.arg, frame)
-            self.write(")")
-
-            if self.environment.is_async:
-                self.write("))")
-
-    def visit_Slice(self, node: nodes.Slice, frame: Frame) -> None:
-        if node.start is not None:
-            self.visit(node.start, frame)
-        self.write(":")
-        if node.stop is not None:
-            self.visit(node.stop, frame)
-        if node.step is not None:
-            self.write(":")
-            self.visit(node.step, frame)
-
-    @contextmanager
-    def _filter_test_common(
-        self, node: t.Union[nodes.Filter, nodes.Test], frame: Frame, is_filter: bool
-    ) -> t.Iterator[None]:
-        if self.environment.is_async:
-            self.write("await auto_await(")
-
-        if is_filter:
-            self.write(f"{self.filters[node.name]}(")
-            func = self.environment.filters.get(node.name)
-        else:
-            self.write(f"{self.tests[node.name]}(")
-            func = self.environment.tests.get(node.name)
-
-        # When inside an If or CondExpr frame, allow the filter to be
-        # undefined at compile time and only raise an error if it's
-        # actually called at runtime. See pull_dependencies.
-        if func is None and not frame.soft_frame:
-            type_name = "filter" if is_filter else "test"
-            self.fail(f"No {type_name} named {node.name!r}.", node.lineno)
-
-        pass_arg = {
-            _PassArg.context: "context",
-            _PassArg.eval_context: "context.eval_ctx",
-            _PassArg.environment: "environment",
-        }.get(
-            _PassArg.from_obj(func)  # type: ignore
-        )
-
-        if pass_arg is not None:
-            self.write(f"{pass_arg}, ")
-
-        # Back to the visitor function to handle visiting the target of
-        # the filter or test.
-        yield
-
-        self.signature(node, frame)
-        self.write(")")
-
-        if self.environment.is_async:
-            self.write(")")
-
-    @optimizeconst
-    def visit_Filter(self, node: nodes.Filter, frame: Frame) -> None:
-        with self._filter_test_common(node, frame, True):
-            # if the filter node is None we are inside a filter block
-            # and want to write to the current buffer
-            if node.node is not None:
-                self.visit(node.node, frame)
-            elif frame.eval_ctx.volatile:
-                self.write(
-                    f"(Markup(concat({frame.buffer}))"
-                    f" if context.eval_ctx.autoescape else concat({frame.buffer}))"
-                )
-            elif frame.eval_ctx.autoescape:
-                self.write(f"Markup(concat({frame.buffer}))")
-            else:
-                self.write(f"concat({frame.buffer})")
-
-    @optimizeconst
-    def visit_Test(self, node: nodes.Test, frame: Frame) -> None:
-        with self._filter_test_common(node, frame, False):
-            self.visit(node.node, frame)
-
-    @optimizeconst
-    def visit_CondExpr(self, node: nodes.CondExpr, frame: Frame) -> None:
-        frame = frame.soft()
-
-        def write_expr2() -> None:
-            if node.expr2 is not None:
-                self.visit(node.expr2, frame)
-                return
-
-            self.write(
-                f'cond_expr_undefined("the inline if-expression on'
-                f" {self.position(node)} evaluated to false and no else"
-                f' section was defined.")'
-            )
-
-        self.write("(")
-        self.visit(node.expr1, frame)
-        self.write(" if ")
-        self.visit(node.test, frame)
-        self.write(" else ")
-        write_expr2()
-        self.write(")")
-
-    @optimizeconst
-    def visit_Call(
-        self, node: nodes.Call, frame: Frame, forward_caller: bool = False
-    ) -> None:
-        if self.environment.is_async:
-            self.write("await auto_await(")
-        if self.environment.sandboxed:
-            self.write("environment.call(context, ")
-        else:
-            self.write("context.call(")
-        self.visit(node.node, frame)
-        extra_kwargs = {"caller": "caller"} if forward_caller else None
-        loop_kwargs = {"_loop_vars": "_loop_vars"} if frame.loop_frame else {}
-        block_kwargs = {"_block_vars": "_block_vars"} if frame.block_frame else {}
-        if extra_kwargs:
-            extra_kwargs.update(loop_kwargs, **block_kwargs)
-        elif loop_kwargs or block_kwargs:
-            extra_kwargs = dict(loop_kwargs, **block_kwargs)
-        self.signature(node, frame, extra_kwargs)
-        self.write(")")
-        if self.environment.is_async:
-            self.write(")")
-
-    def visit_Keyword(self, node: nodes.Keyword, frame: Frame) -> None:
-        self.write(node.key + "=")
-        self.visit(node.value, frame)
-
-    # -- Unused nodes for extensions
-
-    def visit_MarkSafe(self, node: nodes.MarkSafe, frame: Frame) -> None:
-        self.write("Markup(")
-        self.visit(node.expr, frame)
-        self.write(")")
-
-    def visit_MarkSafeIfAutoescape(
-        self, node: nodes.MarkSafeIfAutoescape, frame: Frame
-    ) -> None:
-        self.write("(Markup if context.eval_ctx.autoescape else identity)(")
-        self.visit(node.expr, frame)
-        self.write(")")
-
-    def visit_EnvironmentAttribute(
-        self, node: nodes.EnvironmentAttribute, frame: Frame
-    ) -> None:
-        self.write("environment." + node.name)
-
-    def visit_ExtensionAttribute(
-        self, node: nodes.ExtensionAttribute, frame: Frame
-    ) -> None:
-        self.write(f"environment.extensions[{node.identifier!r}].{node.name}")
-
-    def visit_ImportedName(self, node: nodes.ImportedName, frame: Frame) -> None:
-        self.write(self.import_aliases[node.importname])
-
-    def visit_InternalName(self, node: nodes.InternalName, frame: Frame) -> None:
-        self.write(node.name)
-
-    def visit_ContextReference(
-        self, node: nodes.ContextReference, frame: Frame
-    ) -> None:
-        self.write("context")
-
-    def visit_DerivedContextReference(
-        self, node: nodes.DerivedContextReference, frame: Frame
-    ) -> None:
-        self.write(self.derive_context(frame))
-
-    def visit_Continue(self, node: nodes.Continue, frame: Frame) -> None:
-        self.writeline("continue", node)
-
-    def visit_Break(self, node: nodes.Break, frame: Frame) -> None:
-        self.writeline("break", node)
-
-    def visit_Scope(self, node: nodes.Scope, frame: Frame) -> None:
-        scope_frame = frame.inner()
-        scope_frame.symbols.analyze_node(node)
-        self.enter_frame(scope_frame)
-        self.blockvisit(node.body, scope_frame)
-        self.leave_frame(scope_frame)
-
-    def visit_OverlayScope(self, node: nodes.OverlayScope, frame: Frame) -> None:
-        ctx = self.temporary_identifier()
-        self.writeline(f"{ctx} = {self.derive_context(frame)}")
-        self.writeline(f"{ctx}.vars = ")
-        self.visit(node.context, frame)
-        self.push_context_reference(ctx)
-
-        scope_frame = frame.inner(isolated=True)
-        scope_frame.symbols.analyze_node(node)
-        self.enter_frame(scope_frame)
-        self.blockvisit(node.body, scope_frame)
-        self.leave_frame(scope_frame)
-        self.pop_context_reference()
-
-    def visit_EvalContextModifier(
-        self, node: nodes.EvalContextModifier, frame: Frame
-    ) -> None:
-        for keyword in node.options:
-            self.writeline(f"context.eval_ctx.{keyword.key} = ")
-            self.visit(keyword.value, frame)
-            try:
-                val = keyword.value.as_const(frame.eval_ctx)
-            except nodes.Impossible:
-                frame.eval_ctx.volatile = True
-            else:
-                setattr(frame.eval_ctx, keyword.key, val)
-
-    def visit_ScopedEvalContextModifier(
-        self, node: nodes.ScopedEvalContextModifier, frame: Frame
-    ) -> None:
-        old_ctx_name = self.temporary_identifier()
-        saved_ctx = frame.eval_ctx.save()
-        self.writeline(f"{old_ctx_name} = context.eval_ctx.save()")
-        self.visit_EvalContextModifier(node, frame)
-        for child in node.body:
-            self.visit(child, frame)
-        frame.eval_ctx.revert(saved_ctx)
-        self.writeline(f"context.eval_ctx.revert({old_ctx_name})")