FM / jinja2

/opt/alt/python27/lib/python2.7/site-packages/jinja2/

/opt/alt/python27/lib/python2.7/site-packages/jinja2

Name	Size	Mode	Actions
testsuite/	-	0755	rm
bccache.py	12334	0644	edit dl rm
bccache.pyc	14557	0644	edit dl rm
bccache.pyo	14605	0644	edit dl rm
compiler.py	61785	0644	edit dl rm
compiler.pyc	56040	0644	edit dl rm
compiler.pyo	56552	0644	edit dl rm
constants.py	1626	0644	edit dl rm
constants.pyc	1707	0644	edit dl rm
constants.pyo	1707	0644	edit dl rm
debug.py	10980	0644	edit dl rm
debug.pyc	11091	0644	edit dl rm
debug.pyo	11019	0644	edit dl rm
defaults.py	1068	0644	edit dl rm
defaults.pyc	1670	0644	edit dl rm
defaults.pyo	1678	0644	edit dl rm
environment.py	47244	0644	edit dl rm
environment.pyc	47013	0644	edit dl rm
environment.pyo	46819	0644	edit dl rm
exceptions.py	4428	0644	edit dl rm
exceptions.pyc	6521	0644	edit dl rm
exceptions.pyo	6551	0644	edit dl rm
ext.py	25078	0644	edit dl rm
ext.pyc	24801	0644	edit dl rm
ext.pyo	24734	0644	edit dl rm
filters.py	29836	0644	edit dl rm
filters.pyc	34780	0644	edit dl rm
filters.pyo	34966	0644	edit dl rm
lexer.py	28393	0644	edit dl rm
lexer.pyc	23165	0644	edit dl rm
lexer.pyo	23226	0644	edit dl rm
loaders.py	17036	0644	edit dl rm
loaders.pyc	19499	0644	edit dl rm
loaders.pyo	19583	0644	edit dl rm
meta.py	4190	0644	edit dl rm
meta.pyc	4122	0644	edit dl rm
meta.pyo	4122	0644	edit dl rm
nodes.py	28875	0644	edit dl rm
nodes.pyc	43653	0644	edit dl rm
nodes.pyo	43839	0644	edit dl rm
optimizer.py	2302	0644	edit dl rm
optimizer.pyc	2929	0644	edit dl rm
optimizer.pyo	2939	0644	edit dl rm
parser.py	35186	0644	edit dl rm
parser.pyc	31913	0644	edit dl rm
parser.pyo	32334	0644	edit dl rm
runtime.py	19558	0644	edit dl rm
runtime.pyc	23785	0644	edit dl rm
runtime.pyo	23984	0644	edit dl rm
sandbox.py	13445	0644	edit dl rm
sandbox.pyc	12271	0644	edit dl rm
sandbox.pyo	12271	0644	edit dl rm
tests.py	3444	0644	edit dl rm
tests.pyc	5257	0644	edit dl rm
tests.pyo	5259	0644	edit dl rm
utils.py	16165	0644	edit dl rm
utils.pyc	20165	0644	edit dl rm
utils.pyo	20307	0644	edit dl rm
visitor.py	3316	0644	edit dl rm
visitor.pyc	3916	0644	edit dl rm
visitor.pyo	3938	0644	edit dl rm
_compat.py	4042	0644	edit dl rm
_compat.pyc	6421	0644	edit dl rm
_compat.pyo	6431	0644	edit dl rm
_stringdefs.py	404291	0644	edit dl rm
_stringdefs.pyc	208605	0644	edit dl rm
_stringdefs.pyo	208605	0644	edit dl rm
__init__.py	2270	0644	edit dl rm
__init__.pyc	2445	0644	edit dl rm
__init__.pyo	2445	0644	edit dl rm

Edit: /opt/alt/python27/lib/python2.7/site-packages/jinja2/optimizer.py (2302B)

# -*- coding: utf-8 -*-
"""
    jinja2.optimizer
    ~~~~~~~~~~~~~~~~

The jinja optimizer is currently trying to constant fold a few expressions
    and modify the AST in place so that it should be easier to evaluate it.

Because the AST does not contain all the scoping information and the
    compiler has to find that out, we cannot do all the optimizations we
    want.  For example loop unrolling doesn't work because unrolled loops would
    have a different scoping.

The solution would be a second syntax tree that has the scoping rules stored.

:copyright: (c) 2010 by the Jinja Team.
    :license: BSD.
"""
from jinja2 import nodes
from jinja2.visitor import NodeTransformer

def optimize(node, environment):
    """The context hint can be used to perform an static optimization
    based on the context given."""
    optimizer = Optimizer(environment)
    return optimizer.visit(node)

class Optimizer(NodeTransformer):

def __init__(self, environment):
        self.environment = environment

def visit_If(self, node):
        """Eliminate dead code."""
        # do not optimize ifs that have a block inside so that it doesn't
        # break super().
        if node.find(nodes.Block) is not None:
            return self.generic_visit(node)
        try:
            val = self.visit(node.test).as_const()
        except nodes.Impossible:
            return self.generic_visit(node)
        if val:
            body = node.body
        else:
            body = node.else_
        result = []
        for node in body:
            result.extend(self.visit_list(node))
        return result

def fold(self, node):
        """Do constant folding."""
        node = self.generic_visit(node)
        try:
            return nodes.Const.from_untrusted(node.as_const(),
                                              lineno=node.lineno,
                                              environment=self.environment)
        except nodes.Impossible:
            return node

visit_Add = visit_Sub = visit_Mul = visit_Div = visit_FloorDiv = \
    visit_Pow = visit_Mod = visit_And = visit_Or = visit_Pos = visit_Neg = \
    visit_Not = visit_Compare = visit_Getitem = visit_Getattr = visit_Call = \
    visit_Filter = visit_Test = visit_CondExpr = fold
    del fold

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