springsuite: planemo/lib/python3.7/site-packages/jinja2/compiler.py comparison

comparison planemo/lib/python3.7/site-packages/jinja2/compiler.py @ 1:56ad4e20f292 draft

"planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"

author	guerler
date	Fri, 31 Jul 2020 00:32:28 -0400
parents
children

comparison

equal deleted inserted replaced

-:d30785e31577
+:56ad4e20f292
+# -*- 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)

Mercurial > repos > guerler > springsuite

comparison planemo/lib/python3.7/site-packages/jinja2/compiler.py @ 1:56ad4e20f292 draft