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-rw-r--r--third_party/python/Jinja2/jinja2/compiler.py1843
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diff --git a/third_party/python/Jinja2/jinja2/compiler.py b/third_party/python/Jinja2/jinja2/compiler.py
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+++ b/third_party/python/Jinja2/jinja2/compiler.py
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+# -*- coding: utf-8 -*-
+"""Compiles nodes from the parser into Python code."""
+from collections import namedtuple
+from functools import update_wrapper
+from itertools import chain
+from keyword import iskeyword as is_python_keyword
+
+from markupsafe import escape
+from markupsafe import Markup
+
+from . import nodes
+from ._compat import imap
+from ._compat import iteritems
+from ._compat import izip
+from ._compat import NativeStringIO
+from ._compat import range_type
+from ._compat import string_types
+from ._compat import text_type
+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 concat
+from .visitor import NodeVisitor
+
+operators = {
+ "eq": "==",
+ "ne": "!=",
+ "gt": ">",
+ "gteq": ">=",
+ "lt": "<",
+ "lteq": "<=",
+ "in": "in",
+ "notin": "not in",
+}
+
+# what method to iterate over items do we want to use for dict iteration
+# in generated code? on 2.x let's go with iteritems, on 3.x with items
+if hasattr(dict, "iteritems"):
+ dict_item_iter = "iteritems"
+else:
+ dict_item_iter = "items"
+
+code_features = ["division"]
+
+# does this python version support generator stops? (PEP 0479)
+try:
+ exec("from __future__ import generator_stop")
+ code_features.append("generator_stop")
+except SyntaxError:
+ pass
+
+# does this python version support yield from?
+try:
+ exec("def f(): yield from x()")
+except SyntaxError:
+ supports_yield_from = False
+else:
+ supports_yield_from = True
+
+
+def optimizeconst(f):
+ def new_func(self, node, frame, **kwargs):
+ # Only optimize if the frame is not volatile
+ if self.optimized 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(new_func, f)
+
+
+def generate(
+ node, environment, name, filename, stream=None, defer_init=False, optimized=True
+):
+ """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()
+
+
+def has_safe_repr(value):
+ """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_type, Markup) + string_types:
+ return True
+ if type(value) in (tuple, list, set, frozenset):
+ for item in value:
+ if not has_safe_repr(item):
+ return False
+ return True
+ elif type(value) is dict:
+ for key, value in iteritems(value):
+ if not has_safe_repr(key):
+ return False
+ if not has_safe_repr(value):
+ return False
+ return True
+ return False
+
+
+def find_undeclared(nodes, names):
+ """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(object):
+ def __init__(self, node):
+ self.node = node
+ self.accesses_caller = False
+ self.accesses_kwargs = False
+ self.accesses_varargs = False
+
+
+class Frame(object):
+ """Holds compile time information for us."""
+
+ def __init__(self, eval_ctx, parent=None, level=None):
+ self.eval_ctx = eval_ctx
+ self.symbols = Symbols(parent and parent.symbols or None, level=level)
+
+ # 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
+
+ # in some dynamic inheritance situations the compiler needs to add
+ # write tests around output statements.
+ self.require_output_check = parent and parent.require_output_check
+
+ # 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 = None
+
+ # the name of the block we're in, otherwise None.
+ self.block = parent and parent.block or None
+
+ # the parent of this frame
+ self.parent = parent
+
+ if parent is not None:
+ self.buffer = parent.buffer
+
+ def copy(self):
+ """Create a copy of the current one."""
+ rv = object.__new__(self.__class__)
+ rv.__dict__.update(self.__dict__)
+ rv.symbols = self.symbols.copy()
+ return rv
+
+ def inner(self, isolated=False):
+ """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):
+ """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.
+ """
+ rv = self.copy()
+ rv.rootlevel = False
+ 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):
+ self.filters = set()
+ self.tests = set()
+
+ def visit_Filter(self, node):
+ self.generic_visit(node)
+ self.filters.add(node.name)
+
+ def visit_Test(self, node):
+ self.generic_visit(node)
+ self.tests.add(node.name)
+
+ def visit_Block(self, node):
+ """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):
+ self.names = set(names)
+ self.undeclared = set()
+
+ def visit_Name(self, node):
+ 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):
+ """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, name, filename, stream=None, defer_init=False, optimized=True
+ ):
+ if stream is None:
+ stream = NativeStringIO()
+ self.environment = environment
+ self.name = name
+ self.filename = filename
+ self.stream = stream
+ self.created_block_context = False
+ self.defer_init = defer_init
+ self.optimized = optimized
+ if optimized:
+ self.optimizer = Optimizer(environment)
+
+ # aliases for imports
+ self.import_aliases = {}
+
+ # a registry for all blocks. Because blocks are moved out
+ # into the global python scope they are registered here
+ self.blocks = {}
+
+ # 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 = {}
+ self.filters = {}
+
+ # the debug information
+ self.debug_info = []
+ self._write_debug_info = 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 = []
+
+ # Tracks parameter definition blocks
+ self._param_def_block = []
+
+ # Tracks the current context.
+ self._context_reference_stack = ["context"]
+
+ # -- Various compilation helpers
+
+ def fail(self, msg, lineno):
+ """Fail with a :exc:`TemplateAssertionError`."""
+ raise TemplateAssertionError(msg, lineno, self.name, self.filename)
+
+ def temporary_identifier(self):
+ """Get a new unique identifier."""
+ self._last_identifier += 1
+ return "t_%d" % self._last_identifier
+
+ def buffer(self, frame):
+ """Enable buffering for the frame from that point onwards."""
+ frame.buffer = self.temporary_identifier()
+ self.writeline("%s = []" % frame.buffer)
+
+ def return_buffer_contents(self, frame, force_unescaped=False):
+ """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("return Markup(concat(%s))" % frame.buffer)
+ self.outdent()
+ self.writeline("else:")
+ self.indent()
+ self.writeline("return concat(%s)" % frame.buffer)
+ self.outdent()
+ return
+ elif frame.eval_ctx.autoescape:
+ self.writeline("return Markup(concat(%s))" % frame.buffer)
+ return
+ self.writeline("return concat(%s)" % frame.buffer)
+
+ def indent(self):
+ """Indent by one."""
+ self._indentation += 1
+
+ def outdent(self, step=1):
+ """Outdent by step."""
+ self._indentation -= step
+
+ def start_write(self, frame, node=None):
+ """Yield or write into the frame buffer."""
+ if frame.buffer is None:
+ self.writeline("yield ", node)
+ else:
+ self.writeline("%s.append(" % frame.buffer, node)
+
+ def end_write(self, frame):
+ """End the writing process started by `start_write`."""
+ if frame.buffer is not None:
+ self.write(")")
+
+ def simple_write(self, s, frame, node=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, frame):
+ """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):
+ """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, node=None, extra=0):
+ """Combination of newline and write."""
+ self.newline(node, extra)
+ self.write(x)
+
+ def newline(self, node=None, extra=0):
+ """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, frame, extra_kwargs=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 = False
+ for kwarg in chain((x.key for x in node.kwargs), extra_kwargs or ()):
+ if is_python_keyword(kwarg):
+ kwarg_workaround = True
+ break
+
+ 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 iteritems(extra_kwargs):
+ self.write(", %s=%s" % (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("%r: " % kwarg.key)
+ self.visit(kwarg.value, frame)
+ self.write(", ")
+ if extra_kwargs is not None:
+ for key, value in iteritems(extra_kwargs):
+ self.write("%r: %s, " % (key, 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):
+ """Pull all the dependencies."""
+ visitor = DependencyFinderVisitor()
+ for node in nodes:
+ visitor.visit(node)
+ for dependency in "filters", "tests":
+ mapping = getattr(self, dependency)
+ for name in getattr(visitor, dependency):
+ if name not in mapping:
+ mapping[name] = self.temporary_identifier()
+ self.writeline(
+ "%s = environment.%s[%r]" % (mapping[name], dependency, name)
+ )
+
+ def enter_frame(self, frame):
+ undefs = []
+ for target, (action, param) in iteritems(frame.symbols.loads):
+ if action == VAR_LOAD_PARAMETER:
+ pass
+ elif action == VAR_LOAD_RESOLVE:
+ self.writeline("%s = %s(%r)" % (target, self.get_resolve_func(), param))
+ elif action == VAR_LOAD_ALIAS:
+ self.writeline("%s = %s" % (target, param))
+ elif action == VAR_LOAD_UNDEFINED:
+ undefs.append(target)
+ else:
+ raise NotImplementedError("unknown load instruction")
+ if undefs:
+ self.writeline("%s = missing" % " = ".join(undefs))
+
+ def leave_frame(self, frame, with_python_scope=False):
+ if not with_python_scope:
+ undefs = []
+ for target, _ in iteritems(frame.symbols.loads):
+ undefs.append(target)
+ if undefs:
+ self.writeline("%s = missing" % " = ".join(undefs))
+
+ def func(self, name):
+ if self.environment.is_async:
+ return "async def %s" % name
+ return "def %s" % name
+
+ def macro_body(self, node, frame):
+ """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("%s(%s):" % (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("if %s is missing:" % ref)
+ self.indent()
+ try:
+ default = node.defaults[idx - len(node.args)]
+ except IndexError:
+ self.writeline(
+ "%s = undefined(%r, name=%r)"
+ % (ref, "parameter %r was not provided" % arg.name, arg.name)
+ )
+ else:
+ self.writeline("%s = " % 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, frame):
+ """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(
+ "Macro(environment, macro, %r, (%s), %r, %r, %r, "
+ "context.eval_ctx.autoescape)"
+ % (
+ name,
+ arg_tuple,
+ macro_ref.accesses_kwargs,
+ macro_ref.accesses_varargs,
+ macro_ref.accesses_caller,
+ )
+ )
+
+ def position(self, node):
+ """Return a human readable position for the node."""
+ rv = "line %d" % node.lineno
+ if self.name is not None:
+ rv += " in " + repr(self.name)
+ return rv
+
+ def dump_local_context(self, frame):
+ return "{%s}" % ", ".join(
+ "%r: %s" % (name, target)
+ for name, target in iteritems(frame.symbols.dump_stores())
+ )
+
+ def write_commons(self):
+ """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):
+ """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):
+ """Pops the current parameter definitions set."""
+ self._param_def_block.pop()
+
+ def mark_parameter_stored(self, target):
+ """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):
+ self._context_reference_stack.append(target)
+
+ def pop_context_reference(self):
+ self._context_reference_stack.pop()
+
+ def get_context_ref(self):
+ return self._context_reference_stack[-1]
+
+ def get_resolve_func(self):
+ target = self._context_reference_stack[-1]
+ if target == "context":
+ return "resolve"
+ return "%s.resolve" % target
+
+ def derive_context(self, frame):
+ return "%s.derived(%s)" % (
+ self.get_context_ref(),
+ self.dump_local_context(frame),
+ )
+
+ def parameter_is_undeclared(self, target):
+ """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):
+ """Pushes a new layer for assignment tracking."""
+ self._assign_stack.append(set())
+
+ def pop_assign_tracking(self, frame):
+ """Pops the topmost level for assignment tracking and updates the
+ context variables if necessary.
+ """
+ vars = self._assign_stack.pop()
+ if 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)
+ self.writeline("context.vars[%r] = %s" % (name, ref))
+ else:
+ self.writeline("context.vars.update({")
+ for idx, name in enumerate(vars):
+ if idx:
+ self.write(", ")
+ ref = frame.symbols.ref(name)
+ self.write("%r: %s" % (name, ref))
+ self.write("})")
+ if public_names:
+ if len(public_names) == 1:
+ self.writeline("context.exported_vars.add(%r)" % public_names[0])
+ else:
+ self.writeline(
+ "context.exported_vars.update((%s))"
+ % ", ".join(imap(repr, public_names))
+ )
+
+ # -- Statement Visitors
+
+ def visit_Template(self, node, frame=None):
+ assert frame is None, "no root frame allowed"
+ eval_ctx = EvalContext(self.environment, self.name)
+
+ from .runtime import exported
+
+ self.writeline("from __future__ import %s" % ", ".join(code_features))
+ self.writeline("from jinja2.runtime import " + ", ".join(exported))
+
+ if self.environment.is_async:
+ self.writeline(
+ "from jinja2.asyncsupport import auto_await, "
+ "auto_aiter, AsyncLoopContext"
+ )
+
+ # if we want a deferred initialization we cannot move the
+ # environment into a local name
+ envenv = not self.defer_init and ", environment=environment" or ""
+
+ # 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("block %r defined twice" % block.name, 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("from %s import %s as %s" % (module, obj, alias))
+ else:
+ self.writeline("import %s as %s" % (imp, alias))
+
+ # add the load name
+ self.writeline("name = %r" % self.name)
+
+ # generate the root render function.
+ self.writeline(
+ "%s(context, missing=missing%s):" % (self.func("root"), 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("%s = TemplateReference(context)" % ref)
+ 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 supports_yield_from and not self.environment.is_async:
+ self.writeline("yield from parent_template.root_render_func(context)")
+ else:
+ self.writeline(
+ "%sfor event in parent_template."
+ "root_render_func(context):"
+ % (self.environment.is_async and "async " or "")
+ )
+ 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 iteritems(self.blocks):
+ self.writeline(
+ "%s(context, missing=missing%s):"
+ % (self.func("block_" + name), 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)
+ undeclared = find_undeclared(block.body, ("self", "super"))
+ if "self" in undeclared:
+ ref = block_frame.symbols.declare_parameter("self")
+ self.writeline("%s = TemplateReference(context)" % ref)
+ if "super" in undeclared:
+ ref = block_frame.symbols.declare_parameter("super")
+ self.writeline("%s = context.super(%r, block_%s)" % (ref, name, name))
+ block_frame.symbols.analyze_node(block)
+ block_frame.block = name
+ 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()
+
+ self.writeline(
+ "blocks = {%s}" % ", ".join("%r: block_%s" % (x, x) for x in self.blocks),
+ extra=1,
+ )
+
+ # add a function that returns the debug info
+ self.writeline(
+ "debug_info = %r" % "&".join("%s=%s" % x for x in self.debug_info)
+ )
+
+ def visit_Block(self, node, frame):
+ """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 (
+ supports_yield_from
+ and not self.environment.is_async
+ and frame.buffer is None
+ ):
+ self.writeline(
+ "yield from context.blocks[%r][0](%s)" % (node.name, context), node
+ )
+ else:
+ loop = self.environment.is_async and "async for" or "for"
+ self.writeline(
+ "%s event in context.blocks[%r][0](%s):" % (loop, node.name, context),
+ node,
+ )
+ self.indent()
+ self.simple_write("event", frame)
+ self.outdent()
+
+ self.outdent(level)
+
+ def visit_Extends(self, node, frame):
+ """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(%r)" % "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(", %r)" % self.name)
+ self.writeline(
+ "for name, parent_block in parent_template.blocks.%s():" % dict_item_iter
+ )
+ 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, frame):
+ """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, string_types):
+ 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("template = environment.%s(" % func_name, node)
+ self.visit(node.template, frame)
+ self.write(", %r)" % self.name)
+ 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:
+ loop = self.environment.is_async and "async for" or "for"
+ self.writeline(
+ "%s event in template.root_render_func("
+ "template.new_context(context.get_all(), True, "
+ "%s)):" % (loop, self.dump_local_context(frame))
+ )
+ elif self.environment.is_async:
+ self.writeline(
+ "for event in (await "
+ "template._get_default_module_async())"
+ "._body_stream:"
+ )
+ else:
+ if supports_yield_from:
+ self.writeline("yield from template._get_default_module()._body_stream")
+ skip_event_yield = True
+ else:
+ self.writeline(
+ "for event in template._get_default_module()._body_stream:"
+ )
+
+ if not skip_event_yield:
+ self.indent()
+ self.simple_write("event", frame)
+ self.outdent()
+
+ if node.ignore_missing:
+ self.outdent()
+
+ def visit_Import(self, node, frame):
+ """Visit regular imports."""
+ self.writeline("%s = " % frame.symbols.ref(node.target), node)
+ if frame.toplevel:
+ self.write("context.vars[%r] = " % node.target)
+ if self.environment.is_async:
+ self.write("await ")
+ self.write("environment.get_template(")
+ self.visit(node.template, frame)
+ self.write(", %r)." % self.name)
+ if node.with_context:
+ self.write(
+ "make_module%s(context.get_all(), True, %s)"
+ % (
+ self.environment.is_async and "_async" or "",
+ self.dump_local_context(frame),
+ )
+ )
+ elif self.environment.is_async:
+ self.write("_get_default_module_async()")
+ else:
+ self.write("_get_default_module()")
+ if frame.toplevel and not node.target.startswith("_"):
+ self.writeline("context.exported_vars.discard(%r)" % node.target)
+
+ def visit_FromImport(self, node, frame):
+ """Visit named imports."""
+ self.newline(node)
+ self.write(
+ "included_template = %senvironment.get_template("
+ % (self.environment.is_async and "await " or "")
+ )
+ self.visit(node.template, frame)
+ self.write(", %r)." % self.name)
+ if node.with_context:
+ self.write(
+ "make_module%s(context.get_all(), True, %s)"
+ % (
+ self.environment.is_async and "_async" or "",
+ self.dump_local_context(frame),
+ )
+ )
+ elif self.environment.is_async:
+ self.write("_get_default_module_async()")
+ else:
+ self.write("_get_default_module()")
+
+ var_names = []
+ discarded_names = []
+ for name in node.names:
+ if isinstance(name, tuple):
+ name, alias = name
+ else:
+ alias = name
+ self.writeline(
+ "%s = getattr(included_template, "
+ "%r, missing)" % (frame.symbols.ref(alias), name)
+ )
+ self.writeline("if %s is missing:" % frame.symbols.ref(alias))
+ self.indent()
+ self.writeline(
+ "%s = undefined(%r %% "
+ "included_template.__name__, "
+ "name=%r)"
+ % (
+ frame.symbols.ref(alias),
+ "the template %%r (imported on %s) does "
+ "not export the requested name %s"
+ % (self.position(node), repr(name)),
+ name,
+ )
+ )
+ 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(
+ "context.vars[%r] = %s" % (name, frame.symbols.ref(name))
+ )
+ else:
+ self.writeline(
+ "context.vars.update({%s})"
+ % ", ".join(
+ "%r: %s" % (name, frame.symbols.ref(name)) for name in var_names
+ )
+ )
+ if discarded_names:
+ if len(discarded_names) == 1:
+ self.writeline("context.exported_vars.discard(%r)" % discarded_names[0])
+ else:
+ self.writeline(
+ "context.exported_vars.difference_"
+ "update((%s))" % ", ".join(imap(repr, discarded_names))
+ )
+
+ def visit_For(self, node, frame):
+ loop_frame = frame.inner()
+ 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.
+ extended_loop = node.recursive or "loop" in find_undeclared(
+ node.iter_child_nodes(only=("body",)), ("loop",)
+ )
+
+ 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("%s(fiter):" % self.func(loop_filter_func), node.test)
+ self.indent()
+ self.enter_frame(test_frame)
+ self.writeline(self.environment.is_async and "async for " or "for ")
+ self.visit(node.target, loop_frame)
+ self.write(" in ")
+ self.write(self.environment.is_async and "auto_aiter(fiter)" or "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(
+ "%s(reciter, loop_render_func, depth=0):" % self.func("loop"), 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("%s = missing" % loop_ref)
+
+ 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("%s = 1" % iteration_indicator)
+
+ self.writeline(self.environment.is_async and "async for " or "for ", node)
+ self.visit(node.target, loop_frame)
+ if extended_loop:
+ if self.environment.is_async:
+ self.write(", %s in AsyncLoopContext(" % loop_ref)
+ else:
+ self.write(", %s in LoopContext(" % loop_ref)
+ else:
+ self.write(" in ")
+
+ if node.test:
+ self.write("%s(" % 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(extended_loop and ", undefined):" or ":")
+
+ self.indent()
+ self.enter_frame(loop_frame)
+
+ self.blockvisit(node.body, loop_frame)
+ if node.else_:
+ self.writeline("%s = 0" % iteration_indicator)
+ self.outdent()
+ self.leave_frame(
+ loop_frame, with_python_scope=node.recursive and not node.else_
+ )
+
+ if node.else_:
+ self.writeline("if %s:" % 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)
+ if self.environment.is_async:
+ self.write("await ")
+ self.write("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)
+
+ def visit_If(self, node, frame):
+ 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, frame):
+ macro_frame, macro_ref = self.macro_body(node, frame)
+ self.newline()
+ if frame.toplevel:
+ if not node.name.startswith("_"):
+ self.write("context.exported_vars.add(%r)" % node.name)
+ self.writeline("context.vars[%r] = " % node.name)
+ self.write("%s = " % frame.symbols.ref(node.name))
+ self.macro_def(macro_ref, macro_frame)
+
+ def visit_CallBlock(self, node, frame):
+ 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, frame):
+ 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, frame):
+ with_frame = frame.inner()
+ with_frame.symbols.analyze_node(node)
+ self.enter_frame(with_frame)
+ for target, expr in izip(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, frame):
+ self.newline(node)
+ self.visit(node.node, frame)
+
+ _FinalizeInfo = namedtuple("_FinalizeInfo", ("const", "src"))
+ #: 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.
+ _default_finalize = text_type
+ _finalize = None
+
+ def _make_finalize(self):
+ """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 = default = self._default_finalize
+ src = None
+
+ if self.environment.finalize:
+ src = "environment.finalize("
+ env_finalize = self.environment.finalize
+
+ def finalize(value):
+ return default(env_finalize(value))
+
+ if getattr(env_finalize, "contextfunction", False) is True:
+ src += "context, "
+ finalize = None # noqa: F811
+ elif getattr(env_finalize, "evalcontextfunction", False) is True:
+ src += "context.eval_ctx, "
+ finalize = None
+ elif getattr(env_finalize, "environmentfunction", False) is True:
+ src += "environment, "
+
+ def finalize(value):
+ return default(env_finalize(self.environment, value))
+
+ self._finalize = self._FinalizeInfo(finalize, src)
+ return self._finalize
+
+ def _output_const_repr(self, group):
+ """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, frame, finalize):
+ """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 text_type(const)
+
+ return finalize.const(const)
+
+ def _output_child_pre(self, node, frame, finalize):
+ """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 to_string)(")
+ elif frame.eval_ctx.autoescape:
+ self.write("escape(")
+ else:
+ self.write("to_string(")
+
+ if finalize.src is not None:
+ self.write(finalize.src)
+
+ def _output_child_post(self, node, frame, finalize):
+ """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, frame):
+ # 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 = []
+
+ # 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("%s.append(" % frame.buffer)
+ else:
+ self.writeline("%s.extend((" % frame.buffer)
+
+ 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, frame):
+ 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, frame):
+ 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("concat(%s)" % block_frame.buffer)
+ self.write(")")
+ self.pop_assign_tracking(frame)
+ self.leave_frame(block_frame)
+
+ # -- Expression Visitors
+
+ def visit_Name(self, node, frame):
+ if node.ctx == "store" and frame.toplevel:
+ 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(
+ "(undefined(name=%r) if %s is missing else %s)"
+ % (node.name, ref, ref)
+ )
+ return
+
+ self.write(ref)
+
+ def visit_NSRef(self, node, frame):
+ # 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("if not isinstance(%s, Namespace):" % ref)
+ self.indent()
+ self.writeline(
+ "raise TemplateRuntimeError(%r)"
+ % "cannot assign attribute on non-namespace object"
+ )
+ self.outdent()
+ self.writeline("%s[%r]" % (ref, node.attr))
+
+ def visit_Const(self, node, frame):
+ 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, frame):
+ try:
+ self.write(repr(node.as_const(frame.eval_ctx)))
+ except nodes.Impossible:
+ self.write(
+ "(Markup if context.eval_ctx.autoescape else identity)(%r)" % node.data
+ )
+
+ def visit_Tuple(self, node, frame):
+ self.write("(")
+ idx = -1
+ for idx, item in enumerate(node.items):
+ if idx:
+ self.write(", ")
+ self.visit(item, frame)
+ self.write(idx == 0 and ",)" or ")")
+
+ def visit_List(self, node, frame):
+ self.write("[")
+ for idx, item in enumerate(node.items):
+ if idx:
+ self.write(", ")
+ self.visit(item, frame)
+ self.write("]")
+
+ def visit_Dict(self, node, frame):
+ 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("}")
+
+ def binop(operator, interceptable=True): # noqa: B902
+ @optimizeconst
+ def visitor(self, node, frame):
+ if (
+ self.environment.sandboxed
+ and operator in self.environment.intercepted_binops
+ ):
+ self.write("environment.call_binop(context, %r, " % operator)
+ self.visit(node.left, frame)
+ self.write(", ")
+ self.visit(node.right, frame)
+ else:
+ self.write("(")
+ self.visit(node.left, frame)
+ self.write(" %s " % operator)
+ self.visit(node.right, frame)
+ self.write(")")
+
+ return visitor
+
+ def uaop(operator, interceptable=True): # noqa: B902
+ @optimizeconst
+ def visitor(self, node, frame):
+ if (
+ self.environment.sandboxed
+ and operator in self.environment.intercepted_unops
+ ):
+ self.write("environment.call_unop(context, %r, " % operator)
+ self.visit(node.node, frame)
+ else:
+ self.write("(" + operator)
+ self.visit(node.node, frame)
+ self.write(")")
+
+ return visitor
+
+ visit_Add = binop("+")
+ visit_Sub = binop("-")
+ visit_Mul = binop("*")
+ visit_Div = binop("/")
+ visit_FloorDiv = binop("//")
+ visit_Pow = binop("**")
+ visit_Mod = binop("%")
+ visit_And = binop("and", interceptable=False)
+ visit_Or = binop("or", interceptable=False)
+ visit_Pos = uaop("+")
+ visit_Neg = uaop("-")
+ visit_Not = uaop("not ", interceptable=False)
+ del binop, uaop
+
+ @optimizeconst
+ def visit_Concat(self, node, frame):
+ if frame.eval_ctx.volatile:
+ func_name = "(context.eval_ctx.volatile and markup_join or unicode_join)"
+ elif frame.eval_ctx.autoescape:
+ func_name = "markup_join"
+ else:
+ func_name = "unicode_join"
+ self.write("%s((" % func_name)
+ for arg in node.nodes:
+ self.visit(arg, frame)
+ self.write(", ")
+ self.write("))")
+
+ @optimizeconst
+ def visit_Compare(self, node, frame):
+ self.write("(")
+ self.visit(node.expr, frame)
+ for op in node.ops:
+ self.visit(op, frame)
+ self.write(")")
+
+ def visit_Operand(self, node, frame):
+ self.write(" %s " % operators[node.op])
+ self.visit(node.expr, frame)
+
+ @optimizeconst
+ def visit_Getattr(self, node, frame):
+ if self.environment.is_async:
+ self.write("(await auto_await(")
+
+ self.write("environment.getattr(")
+ self.visit(node.node, frame)
+ self.write(", %r)" % node.attr)
+
+ if self.environment.is_async:
+ self.write("))")
+
+ @optimizeconst
+ def visit_Getitem(self, node, frame):
+ # 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, frame):
+ 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)
+
+ @optimizeconst
+ def visit_Filter(self, node, frame):
+ if self.environment.is_async:
+ self.write("await auto_await(")
+ self.write(self.filters[node.name] + "(")
+ func = self.environment.filters.get(node.name)
+ if func is None:
+ self.fail("no filter named %r" % node.name, node.lineno)
+ if getattr(func, "contextfilter", False) is True:
+ self.write("context, ")
+ elif getattr(func, "evalcontextfilter", False) is True:
+ self.write("context.eval_ctx, ")
+ elif getattr(func, "environmentfilter", False) is True:
+ self.write("environment, ")
+
+ # 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(
+ "(context.eval_ctx.autoescape and"
+ " Markup(concat(%s)) or concat(%s))" % (frame.buffer, frame.buffer)
+ )
+ elif frame.eval_ctx.autoescape:
+ self.write("Markup(concat(%s))" % frame.buffer)
+ else:
+ self.write("concat(%s)" % frame.buffer)
+ self.signature(node, frame)
+ self.write(")")
+ if self.environment.is_async:
+ self.write(")")
+
+ @optimizeconst
+ def visit_Test(self, node, frame):
+ self.write(self.tests[node.name] + "(")
+ if node.name not in self.environment.tests:
+ self.fail("no test named %r" % node.name, node.lineno)
+ self.visit(node.node, frame)
+ self.signature(node, frame)
+ self.write(")")
+
+ @optimizeconst
+ def visit_CondExpr(self, node, frame):
+ def write_expr2():
+ if node.expr2 is not None:
+ return self.visit(node.expr2, frame)
+ self.write(
+ "cond_expr_undefined(%r)"
+ % (
+ "the inline if-"
+ "expression on %s evaluated to false and "
+ "no else section was defined." % self.position(node)
+ )
+ )
+
+ 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, frame, forward_caller=False):
+ 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 = forward_caller and {"caller": "caller"} or None
+ self.signature(node, frame, extra_kwargs)
+ self.write(")")
+ if self.environment.is_async:
+ self.write(")")
+
+ def visit_Keyword(self, node, frame):
+ self.write(node.key + "=")
+ self.visit(node.value, frame)
+
+ # -- Unused nodes for extensions
+
+ def visit_MarkSafe(self, node, frame):
+ self.write("Markup(")
+ self.visit(node.expr, frame)
+ self.write(")")
+
+ def visit_MarkSafeIfAutoescape(self, node, frame):
+ self.write("(context.eval_ctx.autoescape and Markup or identity)(")
+ self.visit(node.expr, frame)
+ self.write(")")
+
+ def visit_EnvironmentAttribute(self, node, frame):
+ self.write("environment." + node.name)
+
+ def visit_ExtensionAttribute(self, node, frame):
+ self.write("environment.extensions[%r].%s" % (node.identifier, node.name))
+
+ def visit_ImportedName(self, node, frame):
+ self.write(self.import_aliases[node.importname])
+
+ def visit_InternalName(self, node, frame):
+ self.write(node.name)
+
+ def visit_ContextReference(self, node, frame):
+ self.write("context")
+
+ def visit_DerivedContextReference(self, node, frame):
+ self.write(self.derive_context(frame))
+
+ def visit_Continue(self, node, frame):
+ self.writeline("continue", node)
+
+ def visit_Break(self, node, frame):
+ self.writeline("break", node)
+
+ def visit_Scope(self, node, frame):
+ 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, frame):
+ ctx = self.temporary_identifier()
+ self.writeline("%s = %s" % (ctx, self.derive_context(frame)))
+ self.writeline("%s.vars = " % ctx)
+ 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, frame):
+ for keyword in node.options:
+ self.writeline("context.eval_ctx.%s = " % 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, frame):
+ old_ctx_name = self.temporary_identifier()
+ saved_ctx = frame.eval_ctx.save()
+ self.writeline("%s = context.eval_ctx.save()" % old_ctx_name)
+ self.visit_EvalContextModifier(node, frame)
+ for child in node.body:
+ self.visit(child, frame)
+ frame.eval_ctx.revert(saved_ctx)
+ self.writeline("context.eval_ctx.revert(%s)" % old_ctx_name)
generated by cgit v1.2.3 (git 2.39.1) at 2024-11-11 16:31:29 +0000