argo_navis: venv/lib/python2.7/site-packages/jinja2/compiler.py comparison

comparison venv/lib/python2.7/site-packages/jinja2/compiler.py @ 0:d67268158946 draft

planemo upload commit a3f181f5f126803c654b3a66dd4e83a48f7e203b

author	bcclaywell
date	Mon, 12 Oct 2015 17:43:33 -0400
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--1:000000000000
+:d67268158946
+# -*- coding: utf-8 -*-
+"""
+jinja2.compiler
+~~~~~~~~~~~~~~~
+Compiles nodes into python code.
+:copyright: (c) 2010 by the Jinja Team.
+:license: BSD, see LICENSE for more details.
+"""
+from itertools import chain
+from copy import deepcopy
+from keyword import iskeyword as is_python_keyword
+from jinja2 import nodes
+from jinja2.nodes import EvalContext
+from jinja2.visitor import NodeVisitor
+from jinja2.exceptions import TemplateAssertionError
+from jinja2.utils import Markup, concat, escape
+from jinja2._compat import range_type, text_type, string_types, \
+iteritems, NativeStringIO, imap
+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'
+# does if 0: dummy(x) get us x into the scope?
+def unoptimize_before_dead_code():
+x = 42
+def f():
+if 0: dummy(x)
+return f
+# The getattr is necessary for pypy which does not set this attribute if
+# no closure is on the function
+unoptimize_before_dead_code = bool(
+getattr(unoptimize_before_dead_code(), '__closure__', None))
+def generate(node, environment, name, filename, stream=None,
+defer_init=False):
+"""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)
+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 isinstance(value, (bool, int, float, complex, range_type,
+Markup) + string_types):
+return True
+if isinstance(value, (tuple, list, set, frozenset)):
+for item in value:
+if not has_safe_repr(item):
+return False
+return True
+elif isinstance(value, 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 Identifiers(object):
+"""Tracks the status of identifiers in frames."""
+def __init__(self):
+# variables that are known to be declared (probably from outer
+# frames or because they are special for the frame)
+self.declared = set()
+# undeclared variables from outer scopes
+self.outer_undeclared = set()
+# names that are accessed without being explicitly declared by
+# this one or any of the outer scopes.  Names can appear both in
+# declared and undeclared.
+self.undeclared = set()
+# names that are declared locally
+self.declared_locally = set()
+# names that are declared by parameters
+self.declared_parameter = set()
+def add_special(self, name):
+"""Register a special name like `loop`."""
+self.undeclared.discard(name)
+self.declared.add(name)
+def is_declared(self, name):
+"""Check if a name is declared in this or an outer scope."""
+if name in self.declared_locally or name in self.declared_parameter:
+return True
+return name in self.declared
+def copy(self):
+return deepcopy(self)
+class Frame(object):
+"""Holds compile time information for us."""
+def __init__(self, eval_ctx, parent=None):
+self.eval_ctx = eval_ctx
+self.identifiers = Identifiers()
+# 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
+# a set of actually assigned names
+self.assigned_names = set()
+# the parent of this frame
+self.parent = parent
+if parent is not None:
+self.identifiers.declared.update(
+parent.identifiers.declared |
+parent.identifiers.declared_parameter |
+parent.assigned_names
+)
+self.identifiers.outer_undeclared.update(
+parent.identifiers.undeclared -
+self.identifiers.declared
+)
+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.identifiers = object.__new__(self.identifiers.__class__)
+rv.identifiers.__dict__.update(self.identifiers.__dict__)
+return rv
+def inspect(self, nodes):
+"""Walk the node and check for identifiers.  If the scope is hard (eg:
+enforce on a python level) overrides from outer scopes are tracked
+differently.
+"""
+visitor = FrameIdentifierVisitor(self.identifiers)
+for node in nodes:
+visitor.visit(node)
+def find_shadowed(self, extra=()):
+"""Find all the shadowed names.  extra is an iterable of variables
+that may be defined with `add_special` which may occour scoped.
+"""
+i = self.identifiers
+return (i.declared | i.outer_undeclared) & \
+(i.declared_locally | i.declared_parameter) | \
+set(x for x in extra if i.is_declared(x))
+def inner(self):
+"""Return an inner frame."""
+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.
+"""
+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 FrameIdentifierVisitor(NodeVisitor):
+"""A visitor for `Frame.inspect`."""
+def __init__(self, identifiers):
+self.identifiers = identifiers
+def visit_Name(self, node):
+"""All assignments to names go through this function."""
+if node.ctx == 'store':
+self.identifiers.declared_locally.add(node.name)
+elif node.ctx == 'param':
+self.identifiers.declared_parameter.add(node.name)
+elif node.ctx == 'load' and not \
+self.identifiers.is_declared(node.name):
+self.identifiers.undeclared.add(node.name)
+def visit_If(self, node):
+self.visit(node.test)
+real_identifiers = self.identifiers
+old_names = real_identifiers.declared_locally | \
+real_identifiers.declared_parameter
+def inner_visit(nodes):
+if not nodes:
+return set()
+self.identifiers = real_identifiers.copy()
+for subnode in nodes:
+self.visit(subnode)
+rv = self.identifiers.declared_locally - old_names
+# we have to remember the undeclared variables of this branch
+# because we will have to pull them.
+real_identifiers.undeclared.update(self.identifiers.undeclared)
+self.identifiers = real_identifiers
+return rv
+body = inner_visit(node.body)
+else_ = inner_visit(node.else_ or ())
+# the differences between the two branches are also pulled as
+# undeclared variables
+real_identifiers.undeclared.update(body.symmetric_difference(else_) -
+real_identifiers.declared)
+# remember those that are declared.
+real_identifiers.declared_locally.update(body | else_)
+def visit_Macro(self, node):
+self.identifiers.declared_locally.add(node.name)
+def visit_Import(self, node):
+self.generic_visit(node)
+self.identifiers.declared_locally.add(node.target)
+def visit_FromImport(self, node):
+self.generic_visit(node)
+for name in node.names:
+if isinstance(name, tuple):
+self.identifiers.declared_locally.add(name[1])
+else:
+self.identifiers.declared_locally.add(name)
+def visit_Assign(self, node):
+"""Visit assignments in the correct order."""
+self.visit(node.node)
+self.visit(node.target)
+def visit_For(self, node):
+"""Visiting stops at for blocks.  However the block sequence
+is visited as part of the outer scope.
+"""
+self.visit(node.iter)
+def visit_CallBlock(self, node):
+self.visit(node.call)
+def visit_FilterBlock(self, node):
+self.visit(node.filter)
+def visit_AssignBlock(self, node):
+"""Stop visiting at block assigns."""
+def visit_Scope(self, node):
+"""Stop visiting at scopes."""
+def visit_Block(self, node):
+"""Stop visiting at 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):
+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
+# 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
+# -- 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):
+"""Return the buffer contents of the frame."""
+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()
+elif frame.eval_ctx.autoescape:
+self.writeline('return Markup(concat(%s))' % frame.buffer)
+else:
+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
+unless the force_generator parameter is set to False.
+"""
+if frame.buffer is None:
+self.writeline('if 0: yield None')
+else:
+self.writeline('pass')
+try:
+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 occour.  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_locals(self, frame):
+"""Pull all the references identifiers into the local scope."""
+for name in frame.identifiers.undeclared:
+self.writeline('l_%s = context.resolve(%r)' % (name, name))
+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 unoptimize_scope(self, frame):
+"""Disable Python optimizations for the frame."""
+# XXX: this is not that nice but it has no real overhead.  It
+# mainly works because python finds the locals before dead code
+# is removed.  If that breaks we have to add a dummy function
+# that just accepts the arguments and does nothing.
+if frame.identifiers.declared:
+self.writeline('%sdummy(%s)' % (
+unoptimize_before_dead_code and 'if 0: ' or '',
+', '.join('l_' + name for name in frame.identifiers.declared)
+))
+def push_scope(self, frame, extra_vars=()):
+"""This function returns all the shadowed variables in a dict
+in the form name: alias and will write the required assignments
+into the current scope.  No indentation takes place.
+This also predefines locally declared variables from the loop
+body because under some circumstances it may be the case that
+`extra_vars` is passed to `Frame.find_shadowed`.
+"""
+aliases = {}
+for name in frame.find_shadowed(extra_vars):
+aliases[name] = ident = self.temporary_identifier()
+self.writeline('%s = l_%s' % (ident, name))
+to_declare = set()
+for name in frame.identifiers.declared_locally:
+if name not in aliases:
+to_declare.add('l_' + name)
+if to_declare:
+self.writeline(' = '.join(to_declare) + ' = missing')
+return aliases
+def pop_scope(self, aliases, frame):
+"""Restore all aliases and delete unused variables."""
+for name, alias in iteritems(aliases):
+self.writeline('l_%s = %s' % (name, alias))
+to_delete = set()
+for name in frame.identifiers.declared_locally:
+if name not in aliases:
+to_delete.add('l_' + name)
+if to_delete:
+# we cannot use the del statement here because enclosed
+# scopes can trigger a SyntaxError:
+#   a = 42; b = lambda: a; del a
+self.writeline(' = '.join(to_delete) + ' = missing')
+def function_scoping(self, node, frame, children=None,
+find_special=True):
+"""In Jinja a few statements require the help of anonymous
+functions.  Those are currently macros and call blocks and in
+the future also recursive loops.  As there is currently
+technical limitation that doesn't allow reading and writing a
+variable in a scope where the initial value is coming from an
+outer scope, this function tries to fall back with a common
+error message.  Additionally the frame passed is modified so
+that the argumetns are collected and callers are looked up.
+This will return the modified frame.
+"""
+# we have to iterate twice over it, make sure that works
+if children is None:
+children = node.iter_child_nodes()
+children = list(children)
+func_frame = frame.inner()
+func_frame.inspect(children)
+# variables that are undeclared (accessed before declaration) and
+# declared locally *and* part of an outside scope raise a template
+# assertion error. Reason: we can't generate reasonable code from
+# it without aliasing all the variables.
+# this could be fixed in Python 3 where we have the nonlocal
+# keyword or if we switch to bytecode generation
+overridden_closure_vars = (
+func_frame.identifiers.undeclared &
+func_frame.identifiers.declared &
+(func_frame.identifiers.declared_locally |
+func_frame.identifiers.declared_parameter)
+)
+if overridden_closure_vars:
+self.fail('It\'s not possible to set and access variables '
+'derived from an outer scope! (affects: %s)' %
+', '.join(sorted(overridden_closure_vars)), node.lineno)
+# remove variables from a closure from the frame's undeclared
+# identifiers.
+func_frame.identifiers.undeclared -= (
+func_frame.identifiers.undeclared &
+func_frame.identifiers.declared
+)
+# no special variables for this scope, abort early
+if not find_special:
+return func_frame
+func_frame.accesses_kwargs = False
+func_frame.accesses_varargs = False
+func_frame.accesses_caller = False
+func_frame.arguments = args = ['l_' + x.name for x in node.args]
+undeclared = find_undeclared(children, ('caller', 'kwargs', 'varargs'))
+if 'caller' in undeclared:
+func_frame.accesses_caller = True
+func_frame.identifiers.add_special('caller')
+args.append('l_caller')
+if 'kwargs' in undeclared:
+func_frame.accesses_kwargs = True
+func_frame.identifiers.add_special('kwargs')
+args.append('l_kwargs')
+if 'varargs' in undeclared:
+func_frame.accesses_varargs = True
+func_frame.identifiers.add_special('varargs')
+args.append('l_varargs')
+return func_frame
+def macro_body(self, node, frame, children=None):
+"""Dump the function def of a macro or call block."""
+frame = self.function_scoping(node, frame, children)
+# macros are delayed, they never require output checks
+frame.require_output_check = False
+args = frame.arguments
+# XXX: this is an ugly fix for the loop nesting bug
+# (tests.test_old_bugs.test_loop_call_bug).  This works around
+# a identifier nesting problem we have in general.  It's just more
+# likely to happen in loops which is why we work around it.  The
+# real solution would be "nonlocal" all the identifiers that are
+# leaking into a new python frame and might be used both unassigned
+# and assigned.
+if 'loop' in frame.identifiers.declared:
+args = args + ['l_loop=l_loop']
+self.writeline('def macro(%s):' % ', '.join(args), node)
+self.indent()
+self.buffer(frame)
+self.pull_locals(frame)
+self.blockvisit(node.body, frame)
+self.return_buffer_contents(frame)
+self.outdent()
+return frame
+def macro_def(self, node, frame):
+"""Dump the macro definition for the def created by macro_body."""
+arg_tuple = ', '.join(repr(x.name) for x in node.args)
+name = getattr(node, 'name', None)
+if len(node.args) == 1:
+arg_tuple += ','
+self.write('Macro(environment, macro, %r, (%s), (' %
+(name, arg_tuple))
+for arg in node.defaults:
+self.visit(arg, frame)
+self.write(', ')
+self.write('), %r, %r, %r)' % (
+bool(frame.accesses_kwargs),
+bool(frame.accesses_varargs),
+bool(frame.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
+# -- 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 jinja2.runtime import __all__ as exported
+self.writeline('from __future__ import division')
+self.writeline('from jinja2.runtime import ' + ', '.join(exported))
+if not unoptimize_before_dead_code:
+self.writeline('dummy = lambda *x: None')
+# 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('def root(context%s):' % envenv, extra=1)
+# process the root
+frame = Frame(eval_ctx)
+frame.inspect(node.body)
+frame.toplevel = frame.rootlevel = True
+frame.require_output_check = have_extends and not self.has_known_extends
+self.indent()
+if have_extends:
+self.writeline('parent_template = None')
+if 'self' in find_undeclared(node.body, ('self',)):
+frame.identifiers.add_special('self')
+self.writeline('l_self = TemplateReference(context)')
+self.pull_locals(frame)
+self.pull_dependencies(node.body)
+self.blockvisit(node.body, frame)
+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()
+self.writeline('for event in parent_template.'
+'root_render_func(context):')
+self.indent()
+self.writeline('yield event')
+self.outdent(2 + (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):
+block_frame = Frame(eval_ctx)
+block_frame.inspect(block.body)
+block_frame.block = name
+self.writeline('def block_%s(context%s):' % (name, envenv),
+block, 1)
+self.indent()
+undeclared = find_undeclared(block.body, ('self', 'super'))
+if 'self' in undeclared:
+block_frame.identifiers.add_special('self')
+self.writeline('l_self = TemplateReference(context)')
+if 'super' in undeclared:
+block_frame.identifiers.add_special('super')
+self.writeline('l_super = context.super(%r, '
+'block_%s)' % (name, name))
+self.pull_locals(block_frame)
+self.pull_dependencies(block.body)
+self.blockvisit(block.body, block_frame)
+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 = 1
+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
+context = node.scoped and 'context.derived(locals())' or 'context'
+self.writeline('for event in context.blocks[%r][0](%s):' % (
+node.name, context), node)
+self.indent()
+self.simple_write('event', frame)
+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.with_context:
+self.unoptimize_scope(frame)
+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()
+if node.with_context:
+self.writeline('for event in template.root_render_func('
+'template.new_context(context.parent, True, '
+'locals())):')
+else:
+self.writeline('for event in template.module._body_stream:')
+self.indent()
+self.simple_write('event', frame)
+self.outdent()
+if node.ignore_missing:
+self.outdent()
+def visit_Import(self, node, frame):
+"""Visit regular imports."""
+if node.with_context:
+self.unoptimize_scope(frame)
+self.writeline('l_%s = ' % node.target, node)
+if frame.toplevel:
+self.write('context.vars[%r] = ' % node.target)
+self.write('environment.get_template(')
+self.visit(node.template, frame)
+self.write(', %r).' % self.name)
+if node.with_context:
+self.write('make_module(context.parent, True, locals())')
+else:
+self.write('module')
+if frame.toplevel and not node.target.startswith('_'):
+self.writeline('context.exported_vars.discard(%r)' % node.target)
+frame.assigned_names.add(node.target)
+def visit_FromImport(self, node, frame):
+"""Visit named imports."""
+self.newline(node)
+self.write('included_template = environment.get_template(')
+self.visit(node.template, frame)
+self.write(', %r).' % self.name)
+if node.with_context:
+self.write('make_module(context.parent, True)')
+else:
+self.write('module')
+var_names = []
+discarded_names = []
+for name in node.names:
+if isinstance(name, tuple):
+name, alias = name
+else:
+alias = name
+self.writeline('l_%s = getattr(included_template, '
+'%r, missing)' % (alias, name))
+self.writeline('if l_%s is missing:' % alias)
+self.indent()
+self.writeline('l_%s = environment.undefined(%r %% '
+'included_template.__name__, '
+'name=%r)' %
+(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)
+frame.assigned_names.add(alias)
+if var_names:
+if len(var_names) == 1:
+name = var_names[0]
+self.writeline('context.vars[%r] = l_%s' % (name, name))
+else:
+self.writeline('context.vars.update({%s})' % ', '.join(
+'%r: l_%s' % (name, 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):
+# when calculating the nodes for the inner frame we have to exclude
+# the iterator contents from it
+children = node.iter_child_nodes(exclude=('iter',))
+if node.recursive:
+loop_frame = self.function_scoping(node, frame, children,
+find_special=False)
+else:
+loop_frame = frame.inner()
+loop_frame.inspect(children)
+# 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',))
+# 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 not node.recursive:
+aliases = self.push_scope(loop_frame, ('loop',))
+# otherwise we set up a buffer and add a function def
+else:
+self.writeline('def loop(reciter, loop_render_func, depth=0):', node)
+self.indent()
+self.buffer(loop_frame)
+aliases = {}
+# 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('l_loop = missing')
+loop_frame.identifiers.add_special('loop')
+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)
+self.pull_locals(loop_frame)
+if node.else_:
+iteration_indicator = self.temporary_identifier()
+self.writeline('%s = 1' % iteration_indicator)
+# Create a fake parent loop if the else or test section of a
+# loop is accessing the special loop variable and no parent loop
+# exists.
+if 'loop' not in aliases and 'loop' in find_undeclared(
+node.iter_child_nodes(only=('else_', 'test')), ('loop',)):
+self.writeline("l_loop = environment.undefined(%r, name='loop')" %
+("'loop' is undefined. the filter section of a loop as well "
+"as the else block don't have access to the special 'loop'"
+" variable of the current loop.  Because there is no parent "
+"loop it's undefined.  Happened in loop on %s" %
+self.position(node)))
+self.writeline('for ', node)
+self.visit(node.target, loop_frame)
+self.write(extended_loop and ', l_loop in LoopContext(' or ' in ')
+# if we have an extened loop and a node test, we filter in the
+# "outer frame".
+if extended_loop and node.test is not None:
+self.write('(')
+self.visit(node.target, loop_frame)
+self.write(' for ')
+self.visit(node.target, loop_frame)
+self.write(' in ')
+if node.recursive:
+self.write('reciter')
+else:
+self.visit(node.iter, loop_frame)
+self.write(' if (')
+test_frame = loop_frame.copy()
+self.visit(node.test, test_frame)
+self.write('))')
+elif node.recursive:
+self.write('reciter')
+else:
+self.visit(node.iter, loop_frame)
+if node.recursive:
+self.write(', loop_render_func, depth):')
+else:
+self.write(extended_loop and '):' or ':')
+# tests in not extended loops become a continue
+if not extended_loop and node.test is not None:
+self.indent()
+self.writeline('if not ')
+self.visit(node.test, loop_frame)
+self.write(':')
+self.indent()
+self.writeline('continue')
+self.outdent(2)
+self.indent()
+self.blockvisit(node.body, loop_frame)
+if node.else_:
+self.writeline('%s = 0' % iteration_indicator)
+self.outdent()
+if node.else_:
+self.writeline('if %s:' % iteration_indicator)
+self.indent()
+self.blockvisit(node.else_, loop_frame)
+self.outdent()
+# reset the aliases if there are any.
+if not node.recursive:
+self.pop_scope(aliases, loop_frame)
+# if the node was recursive we have to return the buffer contents
+# and start the iteration code
+if node.recursive:
+self.return_buffer_contents(loop_frame)
+self.outdent()
+self.start_write(frame, node)
+self.write('loop(')
+self.visit(node.iter, frame)
+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()
+if node.else_:
+self.writeline('else:')
+self.indent()
+self.blockvisit(node.else_, if_frame)
+self.outdent()
+def visit_Macro(self, node, frame):
+macro_frame = 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('l_%s = ' % node.name)
+self.macro_def(node, macro_frame)
+frame.assigned_names.add(node.name)
+def visit_CallBlock(self, node, frame):
+children = node.iter_child_nodes(exclude=('call',))
+call_frame = self.macro_body(node, frame, children)
+self.writeline('caller = ')
+self.macro_def(node, call_frame)
+self.start_write(frame, node)
+self.visit_Call(node.call, call_frame, forward_caller=True)
+self.end_write(frame)
+def visit_FilterBlock(self, node, frame):
+filter_frame = frame.inner()
+filter_frame.inspect(node.iter_child_nodes())
+aliases = self.push_scope(filter_frame)
+self.pull_locals(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.pop_scope(aliases, filter_frame)
+def visit_ExprStmt(self, node, frame):
+self.newline(node)
+self.visit(node.node, frame)
+def visit_Output(self, node, frame):
+# if we have a known extends statement, we don't output anything
+# if we are in a require_output_check section
+if self.has_known_extends and frame.require_output_check:
+return
+allow_constant_finalize = True
+if self.environment.finalize:
+func = self.environment.finalize
+if getattr(func, 'contextfunction', False) or \
+getattr(func, 'evalcontextfunction', False):
+allow_constant_finalize = False
+elif getattr(func, 'environmentfunction', False):
+finalize = lambda x: text_type(
+self.environment.finalize(self.environment, x))
+else:
+finalize = lambda x: text_type(self.environment.finalize(x))
+else:
+finalize = text_type
+# if we are inside a frame that requires output checking, we do so
+outdent_later = False
+if frame.require_output_check:
+self.writeline('if parent_template is None:')
+self.indent()
+outdent_later = True
+# try to evaluate as many chunks as possible into a static
+# string at compile time.
+body = []
+for child in node.nodes:
+try:
+if not allow_constant_finalize:
+raise nodes.Impossible()
+const = child.as_const(frame.eval_ctx)
+except nodes.Impossible:
+body.append(child)
+continue
+# the frame can't be volatile here, becaus otherwise the
+# as_const() function would raise an Impossible exception
+# at that point.
+try:
+if frame.eval_ctx.autoescape:
+if hasattr(const, '__html__'):
+const = const.__html__()
+else:
+const = escape(const)
+const = finalize(const)
+except Exception:
+# if something goes wrong here we evaluate the node
+# at runtime for easier debugging
+body.append(child)
+continue
+if body and isinstance(body[-1], list):
+body[-1].append(const)
+else:
+body.append([const])
+# if we have less than 3 nodes or a buffer we yield or extend/append
+if len(body) < 3 or frame.buffer is not None:
+if frame.buffer is not None:
+# for one item we append, for more we extend
+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):
+val = repr(concat(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)
+close = 1
+if frame.eval_ctx.volatile:
+self.write('(context.eval_ctx.autoescape and'
+' escape or to_string)(')
+elif frame.eval_ctx.autoescape:
+self.write('escape(')
+else:
+self.write('to_string(')
+if self.environment.finalize is not None:
+self.write('environment.finalize(')
+if getattr(self.environment.finalize,
+"contextfunction", False):
+self.write('context, ')
+close += 1
+self.visit(item, frame)
+self.write(')' * close)
+if frame.buffer is not None:
+self.write(', ')
+if frame.buffer is not None:
+# close the open parentheses
+self.outdent()
+self.writeline(len(body) == 1 and ')' or '))')
+# otherwise we create a format string as this is faster in that case
+else:
+format = []
+arguments = []
+for item in body:
+if isinstance(item, list):
+format.append(concat(item).replace('%', '%%'))
+else:
+format.append('%s')
+arguments.append(item)
+self.writeline('yield ')
+self.write(repr(concat(format)) + ' % (')
+self.indent()
+for argument in arguments:
+self.newline(argument)
+close = 0
+if frame.eval_ctx.volatile:
+self.write('(context.eval_ctx.autoescape and'
+' escape or to_string)(')
+close += 1
+elif frame.eval_ctx.autoescape:
+self.write('escape(')
+close += 1
+if self.environment.finalize is not None:
+self.write('environment.finalize(')
+if getattr(self.environment.finalize,
+'contextfunction', False):
+self.write('context, ')
+elif getattr(self.environment.finalize,
+'evalcontextfunction', False):
+self.write('context.eval_ctx, ')
+elif getattr(self.environment.finalize,
+'environmentfunction', False):
+self.write('environment, ')
+close += 1
+self.visit(argument, frame)
+self.write(')' * close + ', ')
+self.outdent()
+self.writeline(')')
+if outdent_later:
+self.outdent()
+def make_assignment_frame(self, frame):
+# toplevel assignments however go into the local namespace and
+# the current template's context.  We create a copy of the frame
+# here and add a set so that the Name visitor can add the assigned
+# names here.
+if not frame.toplevel:
+return frame
+assignment_frame = frame.copy()
+assignment_frame.toplevel_assignments = set()
+return assignment_frame
+def export_assigned_vars(self, frame, assignment_frame):
+if not frame.toplevel:
+return
+public_names = [x for x in assignment_frame.toplevel_assignments
+if not x.startswith('_')]
+if len(assignment_frame.toplevel_assignments) == 1:
+name = next(iter(assignment_frame.toplevel_assignments))
+self.writeline('context.vars[%r] = l_%s' % (name, name))
+else:
+self.writeline('context.vars.update({')
+for idx, name in enumerate(assignment_frame.toplevel_assignments):
+if idx:
+self.write(', ')
+self.write('%r: l_%s' % (name, name))
+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)))
+def visit_Assign(self, node, frame):
+self.newline(node)
+assignment_frame = self.make_assignment_frame(frame)
+self.visit(node.target, assignment_frame)
+self.write(' = ')
+self.visit(node.node, frame)
+self.export_assigned_vars(frame, assignment_frame)
+def visit_AssignBlock(self, node, frame):
+block_frame = frame.inner()
+block_frame.inspect(node.body)
+aliases = self.push_scope(block_frame)
+self.pull_locals(block_frame)
+self.buffer(block_frame)
+self.blockvisit(node.body, block_frame)
+self.pop_scope(aliases, block_frame)
+assignment_frame = self.make_assignment_frame(frame)
+self.newline(node)
+self.visit(node.target, assignment_frame)
+self.write(' = concat(%s)' % block_frame.buffer)
+self.export_assigned_vars(frame, assignment_frame)
+# -- Expression Visitors
+def visit_Name(self, node, frame):
+if node.ctx == 'store' and frame.toplevel:
+frame.toplevel_assignments.add(node.name)
+self.write('l_' + node.name)
+frame.assigned_names.add(node.name)
+def visit_Const(self, node, frame):
+val = node.value
+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('(context.eval_ctx.autoescape and Markup or 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):
+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):
+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
+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('))')
+def visit_Compare(self, node, frame):
+self.visit(node.expr, frame)
+for op in node.ops:
+self.visit(op, frame)
+def visit_Operand(self, node, frame):
+self.write(' %s ' % operators[node.op])
+self.visit(node.expr, frame)
+def visit_Getattr(self, node, frame):
+self.write('environment.getattr(')
+self.visit(node.node, frame)
+self.write(', %r)' % node.attr)
+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:
+self.write('environment.getitem(')
+self.visit(node.node, frame)
+self.write(', ')
+self.visit(node.arg, frame)
+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)
+def visit_Filter(self, node, frame):
+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):
+self.write('context, ')
+elif getattr(func, 'evalcontextfilter', False):
+self.write('context.eval_ctx, ')
+elif getattr(func, 'environmentfilter', False):
+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(')')
+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(')')
+def visit_CondExpr(self, node, frame):
+def write_expr2():
+if node.expr2 is not None:
+return self.visit(node.expr2, frame)
+self.write('environment.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(')')
+def visit_Call(self, node, frame, forward_caller=False):
+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(')')
+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_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.inspect(node.iter_child_nodes())
+aliases = self.push_scope(scope_frame)
+self.pull_locals(scope_frame)
+self.blockvisit(node.body, scope_frame)
+self.pop_scope(aliases, scope_frame)
+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()
+safed_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(safed_ctx)
+self.writeline('context.eval_ctx.revert(%s)' % old_ctx_name)

Mercurial > repos > bcclaywell > argo_navis

comparison venv/lib/python2.7/site-packages/jinja2/compiler.py @ 0:d67268158946 draft