genshi/genshi-test: genshi/template/eval.py annotate

annotate genshi/template/eval.py @ 903:95d62e239f60 experimental-inline

inline branch: support for a couple more directives

author	cmlenz
date	Mon, 26 Apr 2010 17:09:08 +0000
parents	09cc3627654c
children

rev	line source
336 5f2c7782cd8a Refactoring: `genshi.template` is now a package, it was getting way to crowded in that file. cmlenz parents: diff changeset	1 # -- coding: utf-8 --
5f2c7782cd8a Refactoring: `genshi.template` is now a package, it was getting way to crowded in that file. cmlenz parents: diff changeset	2 #
902 09cc3627654c Sync `experimental/inline` branch with [source:trunk@1126]. cmlenz parents: 830 diff changeset	3 # Copyright (C) 2006-2010 Edgewall Software
336 5f2c7782cd8a Refactoring: `genshi.template` is now a package, it was getting way to crowded in that file. cmlenz parents: diff changeset	4 # All rights reserved.
5f2c7782cd8a Refactoring: `genshi.template` is now a package, it was getting way to crowded in that file. cmlenz parents: diff changeset	5 #
5f2c7782cd8a Refactoring: `genshi.template` is now a package, it was getting way to crowded in that file. cmlenz parents: diff changeset	6 # This software is licensed as described in the file COPYING, which
5f2c7782cd8a Refactoring: `genshi.template` is now a package, it was getting way to crowded in that file. cmlenz parents: diff changeset	7 # you should have received as part of this distribution. The terms
5f2c7782cd8a Refactoring: `genshi.template` is now a package, it was getting way to crowded in that file. cmlenz parents: diff changeset	8 # are also available at http://genshi.edgewall.org/wiki/License.
5f2c7782cd8a Refactoring: `genshi.template` is now a package, it was getting way to crowded in that file. cmlenz parents: diff changeset	9 #
5f2c7782cd8a Refactoring: `genshi.template` is now a package, it was getting way to crowded in that file. cmlenz parents: diff changeset	10 # This software consists of voluntary contributions made by many
5f2c7782cd8a Refactoring: `genshi.template` is now a package, it was getting way to crowded in that file. cmlenz parents: diff changeset	11 # individuals. For the exact contribution history, see the revision
5f2c7782cd8a Refactoring: `genshi.template` is now a package, it was getting way to crowded in that file. cmlenz parents: diff changeset	12 # history and logs, available at http://genshi.edgewall.org/log/.
5f2c7782cd8a Refactoring: `genshi.template` is now a package, it was getting way to crowded in that file. cmlenz parents: diff changeset	13
5f2c7782cd8a Refactoring: `genshi.template` is now a package, it was getting way to crowded in that file. cmlenz parents: diff changeset	14 """Support for "safe" evaluation of Python expressions."""
5f2c7782cd8a Refactoring: `genshi.template` is now a package, it was getting way to crowded in that file. cmlenz parents: diff changeset	15
5f2c7782cd8a Refactoring: `genshi.template` is now a package, it was getting way to crowded in that file. cmlenz parents: diff changeset	16 import __builtin__
820 1837f39efd6f Sync (old) experimental inline branch with trunk@1027. cmlenz parents: 500 diff changeset	17
1837f39efd6f Sync (old) experimental inline branch with trunk@1027. cmlenz parents: 500 diff changeset	18 from textwrap import dedent
1837f39efd6f Sync (old) experimental inline branch with trunk@1027. cmlenz parents: 500 diff changeset	19 from types import CodeType
358 028a9a50d95a inline branch: Merged [437]. cmlenz parents: 344 diff changeset	20
500 0742f421caba Merged revisions 487-603 via svnmerge from cmlenz parents: 398 diff changeset	21 from genshi.core import Markup
820 1837f39efd6f Sync (old) experimental inline branch with trunk@1027. cmlenz parents: 500 diff changeset	22 from genshi.template.astutil import ASTTransformer, ASTCodeGenerator, \
1837f39efd6f Sync (old) experimental inline branch with trunk@1027. cmlenz parents: 500 diff changeset	23 _ast, parse
500 0742f421caba Merged revisions 487-603 via svnmerge from cmlenz parents: 398 diff changeset	24 from genshi.template.base import TemplateRuntimeError
358 028a9a50d95a inline branch: Merged [437]. cmlenz parents: 344 diff changeset	25 from genshi.util import flatten
336 5f2c7782cd8a Refactoring: `genshi.template` is now a package, it was getting way to crowded in that file. cmlenz parents: diff changeset	26
500 0742f421caba Merged revisions 487-603 via svnmerge from cmlenz parents: 398 diff changeset	27 __all__ = ['Code', 'Expression', 'Suite', 'LenientLookup', 'StrictLookup',
0742f421caba Merged revisions 487-603 via svnmerge from cmlenz parents: 398 diff changeset	28 'Undefined', 'UndefinedError']
0742f421caba Merged revisions 487-603 via svnmerge from cmlenz parents: 398 diff changeset	29 __docformat__ = 'restructuredtext en'
336 5f2c7782cd8a Refactoring: `genshi.template` is now a package, it was getting way to crowded in that file. cmlenz parents: diff changeset	30
5f2c7782cd8a Refactoring: `genshi.template` is now a package, it was getting way to crowded in that file. cmlenz parents: diff changeset	31
820 1837f39efd6f Sync (old) experimental inline branch with trunk@1027. cmlenz parents: 500 diff changeset	32 # Check for a Python 2.4 bug in the eval loop
1837f39efd6f Sync (old) experimental inline branch with trunk@1027. cmlenz parents: 500 diff changeset	33 has_star_import_bug = False
1837f39efd6f Sync (old) experimental inline branch with trunk@1027. cmlenz parents: 500 diff changeset	34 try:
1837f39efd6f Sync (old) experimental inline branch with trunk@1027. cmlenz parents: 500 diff changeset	35 class _FakeMapping(object):
1837f39efd6f Sync (old) experimental inline branch with trunk@1027. cmlenz parents: 500 diff changeset	36 __getitem__ = __setitem__ = lambda *a: None
1837f39efd6f Sync (old) experimental inline branch with trunk@1027. cmlenz parents: 500 diff changeset	37 exec 'from sys import *' in {}, _FakeMapping()
1837f39efd6f Sync (old) experimental inline branch with trunk@1027. cmlenz parents: 500 diff changeset	38 except SystemError:
1837f39efd6f Sync (old) experimental inline branch with trunk@1027. cmlenz parents: 500 diff changeset	39 has_star_import_bug = True
1837f39efd6f Sync (old) experimental inline branch with trunk@1027. cmlenz parents: 500 diff changeset	40 del _FakeMapping
1837f39efd6f Sync (old) experimental inline branch with trunk@1027. cmlenz parents: 500 diff changeset	41
1837f39efd6f Sync (old) experimental inline branch with trunk@1027. cmlenz parents: 500 diff changeset	42
1837f39efd6f Sync (old) experimental inline branch with trunk@1027. cmlenz parents: 500 diff changeset	43 def _star_import_patch(mapping, modname):
1837f39efd6f Sync (old) experimental inline branch with trunk@1027. cmlenz parents: 500 diff changeset	44 """This function is used as helper if a Python version with a broken
1837f39efd6f Sync (old) experimental inline branch with trunk@1027. cmlenz parents: 500 diff changeset	45 star-import opcode is in use.
1837f39efd6f Sync (old) experimental inline branch with trunk@1027. cmlenz parents: 500 diff changeset	46 """
1837f39efd6f Sync (old) experimental inline branch with trunk@1027. cmlenz parents: 500 diff changeset	47 module = __import__(modname, None, None, ['__all__'])
1837f39efd6f Sync (old) experimental inline branch with trunk@1027. cmlenz parents: 500 diff changeset	48 if hasattr(module, '__all__'):
1837f39efd6f Sync (old) experimental inline branch with trunk@1027. cmlenz parents: 500 diff changeset	49 members = module.__all__
1837f39efd6f Sync (old) experimental inline branch with trunk@1027. cmlenz parents: 500 diff changeset	50 else:
1837f39efd6f Sync (old) experimental inline branch with trunk@1027. cmlenz parents: 500 diff changeset	51 members = [x for x in module.__dict__ if not x.startswith('_')]
1837f39efd6f Sync (old) experimental inline branch with trunk@1027. cmlenz parents: 500 diff changeset	52 mapping.update([(name, getattr(module, name)) for name in members])
1837f39efd6f Sync (old) experimental inline branch with trunk@1027. cmlenz parents: 500 diff changeset	53
1837f39efd6f Sync (old) experimental inline branch with trunk@1027. cmlenz parents: 500 diff changeset	54
500 0742f421caba Merged revisions 487-603 via svnmerge from cmlenz parents: 398 diff changeset	55 class Code(object):
0742f421caba Merged revisions 487-603 via svnmerge from cmlenz parents: 398 diff changeset	56 """Abstract base class for the `Expression` and `Suite` classes."""
820 1837f39efd6f Sync (old) experimental inline branch with trunk@1027. cmlenz parents: 500 diff changeset	57 __slots__ = ['source', 'code', 'ast', '_globals']
500 0742f421caba Merged revisions 487-603 via svnmerge from cmlenz parents: 398 diff changeset	58
820 1837f39efd6f Sync (old) experimental inline branch with trunk@1027. cmlenz parents: 500 diff changeset	59 def __init__(self, source, filename=None, lineno=-1, lookup='strict',
1837f39efd6f Sync (old) experimental inline branch with trunk@1027. cmlenz parents: 500 diff changeset	60 xform=None):
500 0742f421caba Merged revisions 487-603 via svnmerge from cmlenz parents: 398 diff changeset	61 """Create the code object, either from a string, or from an AST node.
0742f421caba Merged revisions 487-603 via svnmerge from cmlenz parents: 398 diff changeset	62
0742f421caba Merged revisions 487-603 via svnmerge from cmlenz parents: 398 diff changeset	63 :param source: either a string containing the source code, or an AST
0742f421caba Merged revisions 487-603 via svnmerge from cmlenz parents: 398 diff changeset	64 node
0742f421caba Merged revisions 487-603 via svnmerge from cmlenz parents: 398 diff changeset	65 :param filename: the (preferably absolute) name of the file containing
0742f421caba Merged revisions 487-603 via svnmerge from cmlenz parents: 398 diff changeset	66 the code
0742f421caba Merged revisions 487-603 via svnmerge from cmlenz parents: 398 diff changeset	67 :param lineno: the number of the line on which the code was found
0742f421caba Merged revisions 487-603 via svnmerge from cmlenz parents: 398 diff changeset	68 :param lookup: the lookup class that defines how variables are looked
820 1837f39efd6f Sync (old) experimental inline branch with trunk@1027. cmlenz parents: 500 diff changeset	69 up in the context; can be either "strict" (the default),
1837f39efd6f Sync (old) experimental inline branch with trunk@1027. cmlenz parents: 500 diff changeset	70 "lenient", or a custom lookup class
1837f39efd6f Sync (old) experimental inline branch with trunk@1027. cmlenz parents: 500 diff changeset	71 :param xform: the AST transformer that should be applied to the code;
1837f39efd6f Sync (old) experimental inline branch with trunk@1027. cmlenz parents: 500 diff changeset	72 if `None`, the appropriate transformation is chosen
1837f39efd6f Sync (old) experimental inline branch with trunk@1027. cmlenz parents: 500 diff changeset	73 depending on the mode
500 0742f421caba Merged revisions 487-603 via svnmerge from cmlenz parents: 398 diff changeset	74 """
0742f421caba Merged revisions 487-603 via svnmerge from cmlenz parents: 398 diff changeset	75 if isinstance(source, basestring):
0742f421caba Merged revisions 487-603 via svnmerge from cmlenz parents: 398 diff changeset	76 self.source = source
0742f421caba Merged revisions 487-603 via svnmerge from cmlenz parents: 398 diff changeset	77 node = _parse(source, mode=self.mode)
0742f421caba Merged revisions 487-603 via svnmerge from cmlenz parents: 398 diff changeset	78 else:
820 1837f39efd6f Sync (old) experimental inline branch with trunk@1027. cmlenz parents: 500 diff changeset	79 assert isinstance(source, _ast.AST), \
1837f39efd6f Sync (old) experimental inline branch with trunk@1027. cmlenz parents: 500 diff changeset	80 'Expected string or AST node, but got %r' % source
903 95d62e239f60 inline branch: support for a couple more directives cmlenz parents: 902 diff changeset	81 self.source = ASTCodeGenerator(source).code.strip()
500 0742f421caba Merged revisions 487-603 via svnmerge from cmlenz parents: 398 diff changeset	82 if self.mode == 'eval':
820 1837f39efd6f Sync (old) experimental inline branch with trunk@1027. cmlenz parents: 500 diff changeset	83 node = _ast.Expression()
1837f39efd6f Sync (old) experimental inline branch with trunk@1027. cmlenz parents: 500 diff changeset	84 node.body = source
500 0742f421caba Merged revisions 487-603 via svnmerge from cmlenz parents: 398 diff changeset	85 else:
820 1837f39efd6f Sync (old) experimental inline branch with trunk@1027. cmlenz parents: 500 diff changeset	86 node = _ast.Module()
1837f39efd6f Sync (old) experimental inline branch with trunk@1027. cmlenz parents: 500 diff changeset	87 node.body = [source]
500 0742f421caba Merged revisions 487-603 via svnmerge from cmlenz parents: 398 diff changeset	88
820 1837f39efd6f Sync (old) experimental inline branch with trunk@1027. cmlenz parents: 500 diff changeset	89 self.ast = node
500 0742f421caba Merged revisions 487-603 via svnmerge from cmlenz parents: 398 diff changeset	90 self.code = _compile(node, self.source, mode=self.mode,
820 1837f39efd6f Sync (old) experimental inline branch with trunk@1027. cmlenz parents: 500 diff changeset	91 filename=filename, lineno=lineno, xform=xform)
500 0742f421caba Merged revisions 487-603 via svnmerge from cmlenz parents: 398 diff changeset	92 if lookup is None:
0742f421caba Merged revisions 487-603 via svnmerge from cmlenz parents: 398 diff changeset	93 lookup = LenientLookup
0742f421caba Merged revisions 487-603 via svnmerge from cmlenz parents: 398 diff changeset	94 elif isinstance(lookup, basestring):
0742f421caba Merged revisions 487-603 via svnmerge from cmlenz parents: 398 diff changeset	95 lookup = {'lenient': LenientLookup, 'strict': StrictLookup}[lookup]
820 1837f39efd6f Sync (old) experimental inline branch with trunk@1027. cmlenz parents: 500 diff changeset	96 self._globals = lookup.globals
1837f39efd6f Sync (old) experimental inline branch with trunk@1027. cmlenz parents: 500 diff changeset	97
1837f39efd6f Sync (old) experimental inline branch with trunk@1027. cmlenz parents: 500 diff changeset	98 def __getstate__(self):
1837f39efd6f Sync (old) experimental inline branch with trunk@1027. cmlenz parents: 500 diff changeset	99 state = {'source': self.source, 'ast': self.ast,
1837f39efd6f Sync (old) experimental inline branch with trunk@1027. cmlenz parents: 500 diff changeset	100 'lookup': self._globals.im_self}
1837f39efd6f Sync (old) experimental inline branch with trunk@1027. cmlenz parents: 500 diff changeset	101 c = self.code
1837f39efd6f Sync (old) experimental inline branch with trunk@1027. cmlenz parents: 500 diff changeset	102 state['code'] = (c.co_nlocals, c.co_stacksize, c.co_flags, c.co_code,
1837f39efd6f Sync (old) experimental inline branch with trunk@1027. cmlenz parents: 500 diff changeset	103 c.co_consts, c.co_names, c.co_varnames, c.co_filename,
1837f39efd6f Sync (old) experimental inline branch with trunk@1027. cmlenz parents: 500 diff changeset	104 c.co_name, c.co_firstlineno, c.co_lnotab, (), ())
1837f39efd6f Sync (old) experimental inline branch with trunk@1027. cmlenz parents: 500 diff changeset	105 return state
1837f39efd6f Sync (old) experimental inline branch with trunk@1027. cmlenz parents: 500 diff changeset	106
1837f39efd6f Sync (old) experimental inline branch with trunk@1027. cmlenz parents: 500 diff changeset	107 def __setstate__(self, state):
1837f39efd6f Sync (old) experimental inline branch with trunk@1027. cmlenz parents: 500 diff changeset	108 self.source = state['source']
1837f39efd6f Sync (old) experimental inline branch with trunk@1027. cmlenz parents: 500 diff changeset	109 self.ast = state['ast']
1837f39efd6f Sync (old) experimental inline branch with trunk@1027. cmlenz parents: 500 diff changeset	110 self.code = CodeType(0, *state['code'])
1837f39efd6f Sync (old) experimental inline branch with trunk@1027. cmlenz parents: 500 diff changeset	111 self._globals = state['lookup'].globals
500 0742f421caba Merged revisions 487-603 via svnmerge from cmlenz parents: 398 diff changeset	112
0742f421caba Merged revisions 487-603 via svnmerge from cmlenz parents: 398 diff changeset	113 def __eq__(self, other):
0742f421caba Merged revisions 487-603 via svnmerge from cmlenz parents: 398 diff changeset	114 return (type(other) == type(self)) and (self.code == other.code)
0742f421caba Merged revisions 487-603 via svnmerge from cmlenz parents: 398 diff changeset	115
0742f421caba Merged revisions 487-603 via svnmerge from cmlenz parents: 398 diff changeset	116 def __hash__(self):
0742f421caba Merged revisions 487-603 via svnmerge from cmlenz parents: 398 diff changeset	117 return hash(self.code)
0742f421caba Merged revisions 487-603 via svnmerge from cmlenz parents: 398 diff changeset	118
0742f421caba Merged revisions 487-603 via svnmerge from cmlenz parents: 398 diff changeset	119 def __ne__(self, other):
0742f421caba Merged revisions 487-603 via svnmerge from cmlenz parents: 398 diff changeset	120 return not self == other
0742f421caba Merged revisions 487-603 via svnmerge from cmlenz parents: 398 diff changeset	121
0742f421caba Merged revisions 487-603 via svnmerge from cmlenz parents: 398 diff changeset	122 def __repr__(self):
902 09cc3627654c Sync `experimental/inline` branch with [source:trunk@1126]. cmlenz parents: 830 diff changeset	123 return '%s(%r)' % (type(self).__name__, self.source)
500 0742f421caba Merged revisions 487-603 via svnmerge from cmlenz parents: 398 diff changeset	124
0742f421caba Merged revisions 487-603 via svnmerge from cmlenz parents: 398 diff changeset	125
0742f421caba Merged revisions 487-603 via svnmerge from cmlenz parents: 398 diff changeset	126 class Expression(Code):
336 5f2c7782cd8a Refactoring: `genshi.template` is now a package, it was getting way to crowded in that file. cmlenz parents: diff changeset	127 """Evaluates Python expressions used in templates.
5f2c7782cd8a Refactoring: `genshi.template` is now a package, it was getting way to crowded in that file. cmlenz parents: diff changeset	128
5f2c7782cd8a Refactoring: `genshi.template` is now a package, it was getting way to crowded in that file. cmlenz parents: diff changeset	129 >>> data = dict(test='Foo', items=[1, 2, 3], dict={'some': 'thing'})
5f2c7782cd8a Refactoring: `genshi.template` is now a package, it was getting way to crowded in that file. cmlenz parents: diff changeset	130 >>> Expression('test').evaluate(data)
5f2c7782cd8a Refactoring: `genshi.template` is now a package, it was getting way to crowded in that file. cmlenz parents: diff changeset	131 'Foo'
5f2c7782cd8a Refactoring: `genshi.template` is now a package, it was getting way to crowded in that file. cmlenz parents: diff changeset	132
5f2c7782cd8a Refactoring: `genshi.template` is now a package, it was getting way to crowded in that file. cmlenz parents: diff changeset	133 >>> Expression('items[0]').evaluate(data)
5f2c7782cd8a Refactoring: `genshi.template` is now a package, it was getting way to crowded in that file. cmlenz parents: diff changeset	134 1
5f2c7782cd8a Refactoring: `genshi.template` is now a package, it was getting way to crowded in that file. cmlenz parents: diff changeset	135 >>> Expression('items[-1]').evaluate(data)
5f2c7782cd8a Refactoring: `genshi.template` is now a package, it was getting way to crowded in that file. cmlenz parents: diff changeset	136 3
5f2c7782cd8a Refactoring: `genshi.template` is now a package, it was getting way to crowded in that file. cmlenz parents: diff changeset	137 >>> Expression('dict["some"]').evaluate(data)
5f2c7782cd8a Refactoring: `genshi.template` is now a package, it was getting way to crowded in that file. cmlenz parents: diff changeset	138 'thing'
5f2c7782cd8a Refactoring: `genshi.template` is now a package, it was getting way to crowded in that file. cmlenz parents: diff changeset	139
5f2c7782cd8a Refactoring: `genshi.template` is now a package, it was getting way to crowded in that file. cmlenz parents: diff changeset	140 Similar to e.g. Javascript, expressions in templates can use the dot
5f2c7782cd8a Refactoring: `genshi.template` is now a package, it was getting way to crowded in that file. cmlenz parents: diff changeset	141 notation for attribute access to access items in mappings:
5f2c7782cd8a Refactoring: `genshi.template` is now a package, it was getting way to crowded in that file. cmlenz parents: diff changeset	142
5f2c7782cd8a Refactoring: `genshi.template` is now a package, it was getting way to crowded in that file. cmlenz parents: diff changeset	143 >>> Expression('dict.some').evaluate(data)
5f2c7782cd8a Refactoring: `genshi.template` is now a package, it was getting way to crowded in that file. cmlenz parents: diff changeset	144 'thing'
5f2c7782cd8a Refactoring: `genshi.template` is now a package, it was getting way to crowded in that file. cmlenz parents: diff changeset	145
5f2c7782cd8a Refactoring: `genshi.template` is now a package, it was getting way to crowded in that file. cmlenz parents: diff changeset	146 This also works the other way around: item access can be used to access
500 0742f421caba Merged revisions 487-603 via svnmerge from cmlenz parents: 398 diff changeset	147 any object attribute:
336 5f2c7782cd8a Refactoring: `genshi.template` is now a package, it was getting way to crowded in that file. cmlenz parents: diff changeset	148
5f2c7782cd8a Refactoring: `genshi.template` is now a package, it was getting way to crowded in that file. cmlenz parents: diff changeset	149 >>> class MyClass(object):
5f2c7782cd8a Refactoring: `genshi.template` is now a package, it was getting way to crowded in that file. cmlenz parents: diff changeset	150 ... myattr = 'Bar'
5f2c7782cd8a Refactoring: `genshi.template` is now a package, it was getting way to crowded in that file. cmlenz parents: diff changeset	151 >>> data = dict(mine=MyClass(), key='myattr')
5f2c7782cd8a Refactoring: `genshi.template` is now a package, it was getting way to crowded in that file. cmlenz parents: diff changeset	152 >>> Expression('mine.myattr').evaluate(data)
5f2c7782cd8a Refactoring: `genshi.template` is now a package, it was getting way to crowded in that file. cmlenz parents: diff changeset	153 'Bar'
5f2c7782cd8a Refactoring: `genshi.template` is now a package, it was getting way to crowded in that file. cmlenz parents: diff changeset	154 >>> Expression('mine["myattr"]').evaluate(data)
5f2c7782cd8a Refactoring: `genshi.template` is now a package, it was getting way to crowded in that file. cmlenz parents: diff changeset	155 'Bar'
5f2c7782cd8a Refactoring: `genshi.template` is now a package, it was getting way to crowded in that file. cmlenz parents: diff changeset	156 >>> Expression('mine[key]').evaluate(data)
5f2c7782cd8a Refactoring: `genshi.template` is now a package, it was getting way to crowded in that file. cmlenz parents: diff changeset	157 'Bar'
5f2c7782cd8a Refactoring: `genshi.template` is now a package, it was getting way to crowded in that file. cmlenz parents: diff changeset	158
5f2c7782cd8a Refactoring: `genshi.template` is now a package, it was getting way to crowded in that file. cmlenz parents: diff changeset	159 All of the standard Python operators are available to template expressions.
500 0742f421caba Merged revisions 487-603 via svnmerge from cmlenz parents: 398 diff changeset	160 Built-in functions such as ``len()`` are also available in template
336 5f2c7782cd8a Refactoring: `genshi.template` is now a package, it was getting way to crowded in that file. cmlenz parents: diff changeset	161 expressions:
5f2c7782cd8a Refactoring: `genshi.template` is now a package, it was getting way to crowded in that file. cmlenz parents: diff changeset	162
5f2c7782cd8a Refactoring: `genshi.template` is now a package, it was getting way to crowded in that file. cmlenz parents: diff changeset	163 >>> data = dict(items=[1, 2, 3])
5f2c7782cd8a Refactoring: `genshi.template` is now a package, it was getting way to crowded in that file. cmlenz parents: diff changeset	164 >>> Expression('len(items)').evaluate(data)
5f2c7782cd8a Refactoring: `genshi.template` is now a package, it was getting way to crowded in that file. cmlenz parents: diff changeset	165 3
5f2c7782cd8a Refactoring: `genshi.template` is now a package, it was getting way to crowded in that file. cmlenz parents: diff changeset	166 """
500 0742f421caba Merged revisions 487-603 via svnmerge from cmlenz parents: 398 diff changeset	167 __slots__ = []
0742f421caba Merged revisions 487-603 via svnmerge from cmlenz parents: 398 diff changeset	168 mode = 'eval'
336 5f2c7782cd8a Refactoring: `genshi.template` is now a package, it was getting way to crowded in that file. cmlenz parents: diff changeset	169
344 eb4ef44ea1ad inline branch: Merged [419:421/trunk]. cmlenz parents: 341 diff changeset	170 def evaluate(self, data):
336 5f2c7782cd8a Refactoring: `genshi.template` is now a package, it was getting way to crowded in that file. cmlenz parents: diff changeset	171 """Evaluate the expression against the given data dictionary.
5f2c7782cd8a Refactoring: `genshi.template` is now a package, it was getting way to crowded in that file. cmlenz parents: diff changeset	172
500 0742f421caba Merged revisions 487-603 via svnmerge from cmlenz parents: 398 diff changeset	173 :param data: a mapping containing the data to evaluate against
0742f421caba Merged revisions 487-603 via svnmerge from cmlenz parents: 398 diff changeset	174 :return: the result of the evaluation
336 5f2c7782cd8a Refactoring: `genshi.template` is now a package, it was getting way to crowded in that file. cmlenz parents: diff changeset	175 """
500 0742f421caba Merged revisions 487-603 via svnmerge from cmlenz parents: 398 diff changeset	176 __traceback_hide__ = 'before_and_this'
820 1837f39efd6f Sync (old) experimental inline branch with trunk@1027. cmlenz parents: 500 diff changeset	177 _globals = self._globals(data)
1837f39efd6f Sync (old) experimental inline branch with trunk@1027. cmlenz parents: 500 diff changeset	178 return eval(self.code, _globals, {'__data__': data})
500 0742f421caba Merged revisions 487-603 via svnmerge from cmlenz parents: 398 diff changeset	179
0742f421caba Merged revisions 487-603 via svnmerge from cmlenz parents: 398 diff changeset	180
0742f421caba Merged revisions 487-603 via svnmerge from cmlenz parents: 398 diff changeset	181 class Suite(Code):
0742f421caba Merged revisions 487-603 via svnmerge from cmlenz parents: 398 diff changeset	182 """Executes Python statements used in templates.
0742f421caba Merged revisions 487-603 via svnmerge from cmlenz parents: 398 diff changeset	183
0742f421caba Merged revisions 487-603 via svnmerge from cmlenz parents: 398 diff changeset	184 >>> data = dict(test='Foo', items=[1, 2, 3], dict={'some': 'thing'})
0742f421caba Merged revisions 487-603 via svnmerge from cmlenz parents: 398 diff changeset	185 >>> Suite("foo = dict['some']").execute(data)
0742f421caba Merged revisions 487-603 via svnmerge from cmlenz parents: 398 diff changeset	186 >>> data['foo']
0742f421caba Merged revisions 487-603 via svnmerge from cmlenz parents: 398 diff changeset	187 'thing'
0742f421caba Merged revisions 487-603 via svnmerge from cmlenz parents: 398 diff changeset	188 """
0742f421caba Merged revisions 487-603 via svnmerge from cmlenz parents: 398 diff changeset	189 __slots__ = []
0742f421caba Merged revisions 487-603 via svnmerge from cmlenz parents: 398 diff changeset	190 mode = 'exec'
0742f421caba Merged revisions 487-603 via svnmerge from cmlenz parents: 398 diff changeset	191
0742f421caba Merged revisions 487-603 via svnmerge from cmlenz parents: 398 diff changeset	192 def execute(self, data):
0742f421caba Merged revisions 487-603 via svnmerge from cmlenz parents: 398 diff changeset	193 """Execute the suite in the given data dictionary.
0742f421caba Merged revisions 487-603 via svnmerge from cmlenz parents: 398 diff changeset	194
0742f421caba Merged revisions 487-603 via svnmerge from cmlenz parents: 398 diff changeset	195 :param data: a mapping containing the data to execute in
0742f421caba Merged revisions 487-603 via svnmerge from cmlenz parents: 398 diff changeset	196 """
0742f421caba Merged revisions 487-603 via svnmerge from cmlenz parents: 398 diff changeset	197 __traceback_hide__ = 'before_and_this'
820 1837f39efd6f Sync (old) experimental inline branch with trunk@1027. cmlenz parents: 500 diff changeset	198 _globals = self._globals(data)
500 0742f421caba Merged revisions 487-603 via svnmerge from cmlenz parents: 398 diff changeset	199 exec self.code in _globals, data
0742f421caba Merged revisions 487-603 via svnmerge from cmlenz parents: 398 diff changeset	200
0742f421caba Merged revisions 487-603 via svnmerge from cmlenz parents: 398 diff changeset	201
0742f421caba Merged revisions 487-603 via svnmerge from cmlenz parents: 398 diff changeset	202 UNDEFINED = object()
0742f421caba Merged revisions 487-603 via svnmerge from cmlenz parents: 398 diff changeset	203
0742f421caba Merged revisions 487-603 via svnmerge from cmlenz parents: 398 diff changeset	204
0742f421caba Merged revisions 487-603 via svnmerge from cmlenz parents: 398 diff changeset	205 class UndefinedError(TemplateRuntimeError):
0742f421caba Merged revisions 487-603 via svnmerge from cmlenz parents: 398 diff changeset	206 """Exception thrown when a template expression attempts to access a variable
0742f421caba Merged revisions 487-603 via svnmerge from cmlenz parents: 398 diff changeset	207 not defined in the context.
0742f421caba Merged revisions 487-603 via svnmerge from cmlenz parents: 398 diff changeset	208
0742f421caba Merged revisions 487-603 via svnmerge from cmlenz parents: 398 diff changeset	209 :see: `LenientLookup`, `StrictLookup`
0742f421caba Merged revisions 487-603 via svnmerge from cmlenz parents: 398 diff changeset	210 """
0742f421caba Merged revisions 487-603 via svnmerge from cmlenz parents: 398 diff changeset	211 def __init__(self, name, owner=UNDEFINED):
0742f421caba Merged revisions 487-603 via svnmerge from cmlenz parents: 398 diff changeset	212 if owner is not UNDEFINED:
0742f421caba Merged revisions 487-603 via svnmerge from cmlenz parents: 398 diff changeset	213 message = '%s has no member named "%s"' % (repr(owner), name)
0742f421caba Merged revisions 487-603 via svnmerge from cmlenz parents: 398 diff changeset	214 else:
0742f421caba Merged revisions 487-603 via svnmerge from cmlenz parents: 398 diff changeset	215 message = '"%s" not defined' % name
0742f421caba Merged revisions 487-603 via svnmerge from cmlenz parents: 398 diff changeset	216 TemplateRuntimeError.__init__(self, message)
336 5f2c7782cd8a Refactoring: `genshi.template` is now a package, it was getting way to crowded in that file. cmlenz parents: diff changeset	217
5f2c7782cd8a Refactoring: `genshi.template` is now a package, it was getting way to crowded in that file. cmlenz parents: diff changeset	218
5f2c7782cd8a Refactoring: `genshi.template` is now a package, it was getting way to crowded in that file. cmlenz parents: diff changeset	219 class Undefined(object):
5f2c7782cd8a Refactoring: `genshi.template` is now a package, it was getting way to crowded in that file. cmlenz parents: diff changeset	220 """Represents a reference to an undefined variable.
5f2c7782cd8a Refactoring: `genshi.template` is now a package, it was getting way to crowded in that file. cmlenz parents: diff changeset	221
5f2c7782cd8a Refactoring: `genshi.template` is now a package, it was getting way to crowded in that file. cmlenz parents: diff changeset	222 Unlike the Python runtime, template expressions can refer to an undefined
5f2c7782cd8a Refactoring: `genshi.template` is now a package, it was getting way to crowded in that file. cmlenz parents: diff changeset	223 variable without causing a `NameError` to be raised. The result will be an
500 0742f421caba Merged revisions 487-603 via svnmerge from cmlenz parents: 398 diff changeset	224 instance of the `Undefined` class, which is treated the same as ``False`` in
0742f421caba Merged revisions 487-603 via svnmerge from cmlenz parents: 398 diff changeset	225 conditions, but raise an exception on any other operation:
336 5f2c7782cd8a Refactoring: `genshi.template` is now a package, it was getting way to crowded in that file. cmlenz parents: diff changeset	226
5f2c7782cd8a Refactoring: `genshi.template` is now a package, it was getting way to crowded in that file. cmlenz parents: diff changeset	227 >>> foo = Undefined('foo')
5f2c7782cd8a Refactoring: `genshi.template` is now a package, it was getting way to crowded in that file. cmlenz parents: diff changeset	228 >>> bool(foo)
5f2c7782cd8a Refactoring: `genshi.template` is now a package, it was getting way to crowded in that file. cmlenz parents: diff changeset	229 False
5f2c7782cd8a Refactoring: `genshi.template` is now a package, it was getting way to crowded in that file. cmlenz parents: diff changeset	230 >>> list(foo)
5f2c7782cd8a Refactoring: `genshi.template` is now a package, it was getting way to crowded in that file. cmlenz parents: diff changeset	231 []
902 09cc3627654c Sync `experimental/inline` branch with [source:trunk@1126]. cmlenz parents: 830 diff changeset	232 >>> print(foo)
336 5f2c7782cd8a Refactoring: `genshi.template` is now a package, it was getting way to crowded in that file. cmlenz parents: diff changeset	233 undefined
5f2c7782cd8a Refactoring: `genshi.template` is now a package, it was getting way to crowded in that file. cmlenz parents: diff changeset	234
5f2c7782cd8a Refactoring: `genshi.template` is now a package, it was getting way to crowded in that file. cmlenz parents: diff changeset	235 However, calling an undefined variable, or trying to access an attribute
5f2c7782cd8a Refactoring: `genshi.template` is now a package, it was getting way to crowded in that file. cmlenz parents: diff changeset	236 of that variable, will raise an exception that includes the name used to
5f2c7782cd8a Refactoring: `genshi.template` is now a package, it was getting way to crowded in that file. cmlenz parents: diff changeset	237 reference that undefined variable.
5f2c7782cd8a Refactoring: `genshi.template` is now a package, it was getting way to crowded in that file. cmlenz parents: diff changeset	238
5f2c7782cd8a Refactoring: `genshi.template` is now a package, it was getting way to crowded in that file. cmlenz parents: diff changeset	239 >>> foo('bar')
5f2c7782cd8a Refactoring: `genshi.template` is now a package, it was getting way to crowded in that file. cmlenz parents: diff changeset	240 Traceback (most recent call last):
5f2c7782cd8a Refactoring: `genshi.template` is now a package, it was getting way to crowded in that file. cmlenz parents: diff changeset	241 ...
500 0742f421caba Merged revisions 487-603 via svnmerge from cmlenz parents: 398 diff changeset	242 UndefinedError: "foo" not defined
336 5f2c7782cd8a Refactoring: `genshi.template` is now a package, it was getting way to crowded in that file. cmlenz parents: diff changeset	243
5f2c7782cd8a Refactoring: `genshi.template` is now a package, it was getting way to crowded in that file. cmlenz parents: diff changeset	244 >>> foo.bar
5f2c7782cd8a Refactoring: `genshi.template` is now a package, it was getting way to crowded in that file. cmlenz parents: diff changeset	245 Traceback (most recent call last):
5f2c7782cd8a Refactoring: `genshi.template` is now a package, it was getting way to crowded in that file. cmlenz parents: diff changeset	246 ...
500 0742f421caba Merged revisions 487-603 via svnmerge from cmlenz parents: 398 diff changeset	247 UndefinedError: "foo" not defined
0742f421caba Merged revisions 487-603 via svnmerge from cmlenz parents: 398 diff changeset	248
0742f421caba Merged revisions 487-603 via svnmerge from cmlenz parents: 398 diff changeset	249 :see: `LenientLookup`
336 5f2c7782cd8a Refactoring: `genshi.template` is now a package, it was getting way to crowded in that file. cmlenz parents: diff changeset	250 """
500 0742f421caba Merged revisions 487-603 via svnmerge from cmlenz parents: 398 diff changeset	251 __slots__ = ['_name', '_owner']
336 5f2c7782cd8a Refactoring: `genshi.template` is now a package, it was getting way to crowded in that file. cmlenz parents: diff changeset	252
500 0742f421caba Merged revisions 487-603 via svnmerge from cmlenz parents: 398 diff changeset	253 def __init__(self, name, owner=UNDEFINED):
0742f421caba Merged revisions 487-603 via svnmerge from cmlenz parents: 398 diff changeset	254 """Initialize the object.
0742f421caba Merged revisions 487-603 via svnmerge from cmlenz parents: 398 diff changeset	255
0742f421caba Merged revisions 487-603 via svnmerge from cmlenz parents: 398 diff changeset	256 :param name: the name of the reference
0742f421caba Merged revisions 487-603 via svnmerge from cmlenz parents: 398 diff changeset	257 :param owner: the owning object, if the variable is accessed as a member
0742f421caba Merged revisions 487-603 via svnmerge from cmlenz parents: 398 diff changeset	258 """
0742f421caba Merged revisions 487-603 via svnmerge from cmlenz parents: 398 diff changeset	259 self._name = name
0742f421caba Merged revisions 487-603 via svnmerge from cmlenz parents: 398 diff changeset	260 self._owner = owner
336 5f2c7782cd8a Refactoring: `genshi.template` is now a package, it was getting way to crowded in that file. cmlenz parents: diff changeset	261
5f2c7782cd8a Refactoring: `genshi.template` is now a package, it was getting way to crowded in that file. cmlenz parents: diff changeset	262 def __iter__(self):
5f2c7782cd8a Refactoring: `genshi.template` is now a package, it was getting way to crowded in that file. cmlenz parents: diff changeset	263 return iter([])
5f2c7782cd8a Refactoring: `genshi.template` is now a package, it was getting way to crowded in that file. cmlenz parents: diff changeset	264
5f2c7782cd8a Refactoring: `genshi.template` is now a package, it was getting way to crowded in that file. cmlenz parents: diff changeset	265 def __nonzero__(self):
5f2c7782cd8a Refactoring: `genshi.template` is now a package, it was getting way to crowded in that file. cmlenz parents: diff changeset	266 return False
5f2c7782cd8a Refactoring: `genshi.template` is now a package, it was getting way to crowded in that file. cmlenz parents: diff changeset	267
5f2c7782cd8a Refactoring: `genshi.template` is now a package, it was getting way to crowded in that file. cmlenz parents: diff changeset	268 def __repr__(self):
902 09cc3627654c Sync `experimental/inline` branch with [source:trunk@1126]. cmlenz parents: 830 diff changeset	269 return '<%s %r>' % (type(self).__name__, self._name)
500 0742f421caba Merged revisions 487-603 via svnmerge from cmlenz parents: 398 diff changeset	270
0742f421caba Merged revisions 487-603 via svnmerge from cmlenz parents: 398 diff changeset	271 def __str__(self):
336 5f2c7782cd8a Refactoring: `genshi.template` is now a package, it was getting way to crowded in that file. cmlenz parents: diff changeset	272 return 'undefined'
5f2c7782cd8a Refactoring: `genshi.template` is now a package, it was getting way to crowded in that file. cmlenz parents: diff changeset	273
500 0742f421caba Merged revisions 487-603 via svnmerge from cmlenz parents: 398 diff changeset	274 def _die(self, args, *kwargs):
0742f421caba Merged revisions 487-603 via svnmerge from cmlenz parents: 398 diff changeset	275 """Raise an `UndefinedError`."""
336 5f2c7782cd8a Refactoring: `genshi.template` is now a package, it was getting way to crowded in that file. cmlenz parents: diff changeset	276 __traceback_hide__ = True
500 0742f421caba Merged revisions 487-603 via svnmerge from cmlenz parents: 398 diff changeset	277 raise UndefinedError(self._name, self._owner)
0742f421caba Merged revisions 487-603 via svnmerge from cmlenz parents: 398 diff changeset	278 __call__ = __getattr__ = __getitem__ = _die
0742f421caba Merged revisions 487-603 via svnmerge from cmlenz parents: 398 diff changeset	279
902 09cc3627654c Sync `experimental/inline` branch with [source:trunk@1126]. cmlenz parents: 830 diff changeset	280 # Hack around some behavior introduced in Python 2.6.2
09cc3627654c Sync `experimental/inline` branch with [source:trunk@1126]. cmlenz parents: 830 diff changeset	281 # http://genshi.edgewall.org/ticket/324
09cc3627654c Sync `experimental/inline` branch with [source:trunk@1126]. cmlenz parents: 830 diff changeset	282 __length_hint__ = None
09cc3627654c Sync `experimental/inline` branch with [source:trunk@1126]. cmlenz parents: 830 diff changeset	283
500 0742f421caba Merged revisions 487-603 via svnmerge from cmlenz parents: 398 diff changeset	284
0742f421caba Merged revisions 487-603 via svnmerge from cmlenz parents: 398 diff changeset	285 class LookupBase(object):
0742f421caba Merged revisions 487-603 via svnmerge from cmlenz parents: 398 diff changeset	286 """Abstract base class for variable lookup implementations."""
0742f421caba Merged revisions 487-603 via svnmerge from cmlenz parents: 398 diff changeset	287
830 de82830f8816 inline branch: synced with trunk@1038. cmlenz parents: 820 diff changeset	288 @classmethod
820 1837f39efd6f Sync (old) experimental inline branch with trunk@1027. cmlenz parents: 500 diff changeset	289 def globals(cls, data):
500 0742f421caba Merged revisions 487-603 via svnmerge from cmlenz parents: 398 diff changeset	290 """Construct the globals dictionary to use as the execution context for
0742f421caba Merged revisions 487-603 via svnmerge from cmlenz parents: 398 diff changeset	291 the expression or suite.
0742f421caba Merged revisions 487-603 via svnmerge from cmlenz parents: 398 diff changeset	292 """
0742f421caba Merged revisions 487-603 via svnmerge from cmlenz parents: 398 diff changeset	293 return {
820 1837f39efd6f Sync (old) experimental inline branch with trunk@1027. cmlenz parents: 500 diff changeset	294 '__data__': data,
500 0742f421caba Merged revisions 487-603 via svnmerge from cmlenz parents: 398 diff changeset	295 '_lookup_name': cls.lookup_name,
0742f421caba Merged revisions 487-603 via svnmerge from cmlenz parents: 398 diff changeset	296 '_lookup_attr': cls.lookup_attr,
820 1837f39efd6f Sync (old) experimental inline branch with trunk@1027. cmlenz parents: 500 diff changeset	297 '_lookup_item': cls.lookup_item,
1837f39efd6f Sync (old) experimental inline branch with trunk@1027. cmlenz parents: 500 diff changeset	298 '_star_import_patch': _star_import_patch,
1837f39efd6f Sync (old) experimental inline branch with trunk@1027. cmlenz parents: 500 diff changeset	299 'UndefinedError': UndefinedError,
500 0742f421caba Merged revisions 487-603 via svnmerge from cmlenz parents: 398 diff changeset	300 }
0742f421caba Merged revisions 487-603 via svnmerge from cmlenz parents: 398 diff changeset	301
830 de82830f8816 inline branch: synced with trunk@1038. cmlenz parents: 820 diff changeset	302 @classmethod
500 0742f421caba Merged revisions 487-603 via svnmerge from cmlenz parents: 398 diff changeset	303 def lookup_name(cls, data, name):
0742f421caba Merged revisions 487-603 via svnmerge from cmlenz parents: 398 diff changeset	304 __traceback_hide__ = True
0742f421caba Merged revisions 487-603 via svnmerge from cmlenz parents: 398 diff changeset	305 val = data.get(name, UNDEFINED)
0742f421caba Merged revisions 487-603 via svnmerge from cmlenz parents: 398 diff changeset	306 if val is UNDEFINED:
0742f421caba Merged revisions 487-603 via svnmerge from cmlenz parents: 398 diff changeset	307 val = BUILTINS.get(name, val)
0742f421caba Merged revisions 487-603 via svnmerge from cmlenz parents: 398 diff changeset	308 if val is UNDEFINED:
820 1837f39efd6f Sync (old) experimental inline branch with trunk@1027. cmlenz parents: 500 diff changeset	309 val = cls.undefined(name)
500 0742f421caba Merged revisions 487-603 via svnmerge from cmlenz parents: 398 diff changeset	310 return val
0742f421caba Merged revisions 487-603 via svnmerge from cmlenz parents: 398 diff changeset	311
830 de82830f8816 inline branch: synced with trunk@1038. cmlenz parents: 820 diff changeset	312 @classmethod
820 1837f39efd6f Sync (old) experimental inline branch with trunk@1027. cmlenz parents: 500 diff changeset	313 def lookup_attr(cls, obj, key):
500 0742f421caba Merged revisions 487-603 via svnmerge from cmlenz parents: 398 diff changeset	314 __traceback_hide__ = True
0742f421caba Merged revisions 487-603 via svnmerge from cmlenz parents: 398 diff changeset	315 try:
820 1837f39efd6f Sync (old) experimental inline branch with trunk@1027. cmlenz parents: 500 diff changeset	316 val = getattr(obj, key)
1837f39efd6f Sync (old) experimental inline branch with trunk@1027. cmlenz parents: 500 diff changeset	317 except AttributeError:
1837f39efd6f Sync (old) experimental inline branch with trunk@1027. cmlenz parents: 500 diff changeset	318 if hasattr(obj.__class__, key):
1837f39efd6f Sync (old) experimental inline branch with trunk@1027. cmlenz parents: 500 diff changeset	319 raise
1837f39efd6f Sync (old) experimental inline branch with trunk@1027. cmlenz parents: 500 diff changeset	320 else:
1837f39efd6f Sync (old) experimental inline branch with trunk@1027. cmlenz parents: 500 diff changeset	321 try:
1837f39efd6f Sync (old) experimental inline branch with trunk@1027. cmlenz parents: 500 diff changeset	322 val = obj[key]
1837f39efd6f Sync (old) experimental inline branch with trunk@1027. cmlenz parents: 500 diff changeset	323 except (KeyError, TypeError):
1837f39efd6f Sync (old) experimental inline branch with trunk@1027. cmlenz parents: 500 diff changeset	324 val = cls.undefined(key, owner=obj)
1837f39efd6f Sync (old) experimental inline branch with trunk@1027. cmlenz parents: 500 diff changeset	325 return val
500 0742f421caba Merged revisions 487-603 via svnmerge from cmlenz parents: 398 diff changeset	326
830 de82830f8816 inline branch: synced with trunk@1038. cmlenz parents: 820 diff changeset	327 @classmethod
820 1837f39efd6f Sync (old) experimental inline branch with trunk@1027. cmlenz parents: 500 diff changeset	328 def lookup_item(cls, obj, key):
500 0742f421caba Merged revisions 487-603 via svnmerge from cmlenz parents: 398 diff changeset	329 __traceback_hide__ = True
0742f421caba Merged revisions 487-603 via svnmerge from cmlenz parents: 398 diff changeset	330 if len(key) == 1:
0742f421caba Merged revisions 487-603 via svnmerge from cmlenz parents: 398 diff changeset	331 key = key[0]
0742f421caba Merged revisions 487-603 via svnmerge from cmlenz parents: 398 diff changeset	332 try:
0742f421caba Merged revisions 487-603 via svnmerge from cmlenz parents: 398 diff changeset	333 return obj[key]
0742f421caba Merged revisions 487-603 via svnmerge from cmlenz parents: 398 diff changeset	334 except (AttributeError, KeyError, IndexError, TypeError), e:
0742f421caba Merged revisions 487-603 via svnmerge from cmlenz parents: 398 diff changeset	335 if isinstance(key, basestring):
0742f421caba Merged revisions 487-603 via svnmerge from cmlenz parents: 398 diff changeset	336 val = getattr(obj, key, UNDEFINED)
0742f421caba Merged revisions 487-603 via svnmerge from cmlenz parents: 398 diff changeset	337 if val is UNDEFINED:
820 1837f39efd6f Sync (old) experimental inline branch with trunk@1027. cmlenz parents: 500 diff changeset	338 val = cls.undefined(key, owner=obj)
500 0742f421caba Merged revisions 487-603 via svnmerge from cmlenz parents: 398 diff changeset	339 return val
0742f421caba Merged revisions 487-603 via svnmerge from cmlenz parents: 398 diff changeset	340 raise
0742f421caba Merged revisions 487-603 via svnmerge from cmlenz parents: 398 diff changeset	341
830 de82830f8816 inline branch: synced with trunk@1038. cmlenz parents: 820 diff changeset	342 @classmethod
500 0742f421caba Merged revisions 487-603 via svnmerge from cmlenz parents: 398 diff changeset	343 def undefined(cls, key, owner=UNDEFINED):
0742f421caba Merged revisions 487-603 via svnmerge from cmlenz parents: 398 diff changeset	344 """Can be overridden by subclasses to specify behavior when undefined
0742f421caba Merged revisions 487-603 via svnmerge from cmlenz parents: 398 diff changeset	345 variables are accessed.
0742f421caba Merged revisions 487-603 via svnmerge from cmlenz parents: 398 diff changeset	346
0742f421caba Merged revisions 487-603 via svnmerge from cmlenz parents: 398 diff changeset	347 :param key: the name of the variable
0742f421caba Merged revisions 487-603 via svnmerge from cmlenz parents: 398 diff changeset	348 :param owner: the owning object, if the variable is accessed as a member
0742f421caba Merged revisions 487-603 via svnmerge from cmlenz parents: 398 diff changeset	349 """
0742f421caba Merged revisions 487-603 via svnmerge from cmlenz parents: 398 diff changeset	350 raise NotImplementedError
0742f421caba Merged revisions 487-603 via svnmerge from cmlenz parents: 398 diff changeset	351
0742f421caba Merged revisions 487-603 via svnmerge from cmlenz parents: 398 diff changeset	352
0742f421caba Merged revisions 487-603 via svnmerge from cmlenz parents: 398 diff changeset	353 class LenientLookup(LookupBase):
0742f421caba Merged revisions 487-603 via svnmerge from cmlenz parents: 398 diff changeset	354 """Default variable lookup mechanism for expressions.
0742f421caba Merged revisions 487-603 via svnmerge from cmlenz parents: 398 diff changeset	355
0742f421caba Merged revisions 487-603 via svnmerge from cmlenz parents: 398 diff changeset	356 When an undefined variable is referenced using this lookup style, the
0742f421caba Merged revisions 487-603 via svnmerge from cmlenz parents: 398 diff changeset	357 reference evaluates to an instance of the `Undefined` class:
0742f421caba Merged revisions 487-603 via svnmerge from cmlenz parents: 398 diff changeset	358
0742f421caba Merged revisions 487-603 via svnmerge from cmlenz parents: 398 diff changeset	359 >>> expr = Expression('nothing', lookup='lenient')
0742f421caba Merged revisions 487-603 via svnmerge from cmlenz parents: 398 diff changeset	360 >>> undef = expr.evaluate({})
0742f421caba Merged revisions 487-603 via svnmerge from cmlenz parents: 398 diff changeset	361 >>> undef
0742f421caba Merged revisions 487-603 via svnmerge from cmlenz parents: 398 diff changeset	362 <Undefined 'nothing'>
0742f421caba Merged revisions 487-603 via svnmerge from cmlenz parents: 398 diff changeset	363
0742f421caba Merged revisions 487-603 via svnmerge from cmlenz parents: 398 diff changeset	364 The same will happen when a non-existing attribute or item is accessed on
0742f421caba Merged revisions 487-603 via svnmerge from cmlenz parents: 398 diff changeset	365 an existing object:
0742f421caba Merged revisions 487-603 via svnmerge from cmlenz parents: 398 diff changeset	366
0742f421caba Merged revisions 487-603 via svnmerge from cmlenz parents: 398 diff changeset	367 >>> expr = Expression('something.nil', lookup='lenient')
0742f421caba Merged revisions 487-603 via svnmerge from cmlenz parents: 398 diff changeset	368 >>> expr.evaluate({'something': dict()})
0742f421caba Merged revisions 487-603 via svnmerge from cmlenz parents: 398 diff changeset	369 <Undefined 'nil'>
0742f421caba Merged revisions 487-603 via svnmerge from cmlenz parents: 398 diff changeset	370
0742f421caba Merged revisions 487-603 via svnmerge from cmlenz parents: 398 diff changeset	371 See the documentation of the `Undefined` class for details on the behavior
0742f421caba Merged revisions 487-603 via svnmerge from cmlenz parents: 398 diff changeset	372 of such objects.
0742f421caba Merged revisions 487-603 via svnmerge from cmlenz parents: 398 diff changeset	373
0742f421caba Merged revisions 487-603 via svnmerge from cmlenz parents: 398 diff changeset	374 :see: `StrictLookup`
0742f421caba Merged revisions 487-603 via svnmerge from cmlenz parents: 398 diff changeset	375 """
830 de82830f8816 inline branch: synced with trunk@1038. cmlenz parents: 820 diff changeset	376
de82830f8816 inline branch: synced with trunk@1038. cmlenz parents: 820 diff changeset	377 @classmethod
500 0742f421caba Merged revisions 487-603 via svnmerge from cmlenz parents: 398 diff changeset	378 def undefined(cls, key, owner=UNDEFINED):
0742f421caba Merged revisions 487-603 via svnmerge from cmlenz parents: 398 diff changeset	379 """Return an ``Undefined`` object."""
0742f421caba Merged revisions 487-603 via svnmerge from cmlenz parents: 398 diff changeset	380 __traceback_hide__ = True
0742f421caba Merged revisions 487-603 via svnmerge from cmlenz parents: 398 diff changeset	381 return Undefined(key, owner=owner)
0742f421caba Merged revisions 487-603 via svnmerge from cmlenz parents: 398 diff changeset	382
0742f421caba Merged revisions 487-603 via svnmerge from cmlenz parents: 398 diff changeset	383
0742f421caba Merged revisions 487-603 via svnmerge from cmlenz parents: 398 diff changeset	384 class StrictLookup(LookupBase):
0742f421caba Merged revisions 487-603 via svnmerge from cmlenz parents: 398 diff changeset	385 """Strict variable lookup mechanism for expressions.
0742f421caba Merged revisions 487-603 via svnmerge from cmlenz parents: 398 diff changeset	386
0742f421caba Merged revisions 487-603 via svnmerge from cmlenz parents: 398 diff changeset	387 Referencing an undefined variable using this lookup style will immediately
0742f421caba Merged revisions 487-603 via svnmerge from cmlenz parents: 398 diff changeset	388 raise an ``UndefinedError``:
0742f421caba Merged revisions 487-603 via svnmerge from cmlenz parents: 398 diff changeset	389
0742f421caba Merged revisions 487-603 via svnmerge from cmlenz parents: 398 diff changeset	390 >>> expr = Expression('nothing', lookup='strict')
0742f421caba Merged revisions 487-603 via svnmerge from cmlenz parents: 398 diff changeset	391 >>> expr.evaluate({})
0742f421caba Merged revisions 487-603 via svnmerge from cmlenz parents: 398 diff changeset	392 Traceback (most recent call last):
0742f421caba Merged revisions 487-603 via svnmerge from cmlenz parents: 398 diff changeset	393 ...
0742f421caba Merged revisions 487-603 via svnmerge from cmlenz parents: 398 diff changeset	394 UndefinedError: "nothing" not defined
0742f421caba Merged revisions 487-603 via svnmerge from cmlenz parents: 398 diff changeset	395
0742f421caba Merged revisions 487-603 via svnmerge from cmlenz parents: 398 diff changeset	396 The same happens when a non-existing attribute or item is accessed on an
0742f421caba Merged revisions 487-603 via svnmerge from cmlenz parents: 398 diff changeset	397 existing object:
0742f421caba Merged revisions 487-603 via svnmerge from cmlenz parents: 398 diff changeset	398
0742f421caba Merged revisions 487-603 via svnmerge from cmlenz parents: 398 diff changeset	399 >>> expr = Expression('something.nil', lookup='strict')
0742f421caba Merged revisions 487-603 via svnmerge from cmlenz parents: 398 diff changeset	400 >>> expr.evaluate({'something': dict()})
0742f421caba Merged revisions 487-603 via svnmerge from cmlenz parents: 398 diff changeset	401 Traceback (most recent call last):
0742f421caba Merged revisions 487-603 via svnmerge from cmlenz parents: 398 diff changeset	402 ...
0742f421caba Merged revisions 487-603 via svnmerge from cmlenz parents: 398 diff changeset	403 UndefinedError: {} has no member named "nil"
0742f421caba Merged revisions 487-603 via svnmerge from cmlenz parents: 398 diff changeset	404 """
830 de82830f8816 inline branch: synced with trunk@1038. cmlenz parents: 820 diff changeset	405
de82830f8816 inline branch: synced with trunk@1038. cmlenz parents: 820 diff changeset	406 @classmethod
500 0742f421caba Merged revisions 487-603 via svnmerge from cmlenz parents: 398 diff changeset	407 def undefined(cls, key, owner=UNDEFINED):
0742f421caba Merged revisions 487-603 via svnmerge from cmlenz parents: 398 diff changeset	408 """Raise an ``UndefinedError`` immediately."""
0742f421caba Merged revisions 487-603 via svnmerge from cmlenz parents: 398 diff changeset	409 __traceback_hide__ = True
0742f421caba Merged revisions 487-603 via svnmerge from cmlenz parents: 398 diff changeset	410 raise UndefinedError(key, owner=owner)
336 5f2c7782cd8a Refactoring: `genshi.template` is now a package, it was getting way to crowded in that file. cmlenz parents: diff changeset	411
5f2c7782cd8a Refactoring: `genshi.template` is now a package, it was getting way to crowded in that file. cmlenz parents: diff changeset	412
5f2c7782cd8a Refactoring: `genshi.template` is now a package, it was getting way to crowded in that file. cmlenz parents: diff changeset	413 def _parse(source, mode='eval'):
820 1837f39efd6f Sync (old) experimental inline branch with trunk@1027. cmlenz parents: 500 diff changeset	414 source = source.strip()
1837f39efd6f Sync (old) experimental inline branch with trunk@1027. cmlenz parents: 500 diff changeset	415 if mode == 'exec':
1837f39efd6f Sync (old) experimental inline branch with trunk@1027. cmlenz parents: 500 diff changeset	416 lines = [line.expandtabs() for line in source.splitlines()]
1837f39efd6f Sync (old) experimental inline branch with trunk@1027. cmlenz parents: 500 diff changeset	417 if lines:
1837f39efd6f Sync (old) experimental inline branch with trunk@1027. cmlenz parents: 500 diff changeset	418 first = lines[0]
1837f39efd6f Sync (old) experimental inline branch with trunk@1027. cmlenz parents: 500 diff changeset	419 rest = dedent('\n'.join(lines[1:])).rstrip()
1837f39efd6f Sync (old) experimental inline branch with trunk@1027. cmlenz parents: 500 diff changeset	420 if first.rstrip().endswith(':') and not rest[0].isspace():
1837f39efd6f Sync (old) experimental inline branch with trunk@1027. cmlenz parents: 500 diff changeset	421 rest = '\n'.join([' %s' % line for line in rest.splitlines()])
1837f39efd6f Sync (old) experimental inline branch with trunk@1027. cmlenz parents: 500 diff changeset	422 source = '\n'.join([first, rest])
336 5f2c7782cd8a Refactoring: `genshi.template` is now a package, it was getting way to crowded in that file. cmlenz parents: diff changeset	423 if isinstance(source, unicode):
5f2c7782cd8a Refactoring: `genshi.template` is now a package, it was getting way to crowded in that file. cmlenz parents: diff changeset	424 source = '\xef\xbb\xbf' + source.encode('utf-8')
5f2c7782cd8a Refactoring: `genshi.template` is now a package, it was getting way to crowded in that file. cmlenz parents: diff changeset	425 return parse(source, mode)
5f2c7782cd8a Refactoring: `genshi.template` is now a package, it was getting way to crowded in that file. cmlenz parents: diff changeset	426
820 1837f39efd6f Sync (old) experimental inline branch with trunk@1027. cmlenz parents: 500 diff changeset	427
1837f39efd6f Sync (old) experimental inline branch with trunk@1027. cmlenz parents: 500 diff changeset	428 def _compile(node, source=None, mode='eval', filename=None, lineno=-1,
1837f39efd6f Sync (old) experimental inline branch with trunk@1027. cmlenz parents: 500 diff changeset	429 xform=None):
336 5f2c7782cd8a Refactoring: `genshi.template` is now a package, it was getting way to crowded in that file. cmlenz parents: diff changeset	430 if isinstance(filename, unicode):
5f2c7782cd8a Refactoring: `genshi.template` is now a package, it was getting way to crowded in that file. cmlenz parents: diff changeset	431 # unicode file names not allowed for code objects
5f2c7782cd8a Refactoring: `genshi.template` is now a package, it was getting way to crowded in that file. cmlenz parents: diff changeset	432 filename = filename.encode('utf-8', 'replace')
5f2c7782cd8a Refactoring: `genshi.template` is now a package, it was getting way to crowded in that file. cmlenz parents: diff changeset	433 elif not filename:
5f2c7782cd8a Refactoring: `genshi.template` is now a package, it was getting way to crowded in that file. cmlenz parents: diff changeset	434 filename = '<string>'
5f2c7782cd8a Refactoring: `genshi.template` is now a package, it was getting way to crowded in that file. cmlenz parents: diff changeset	435 if lineno <= 0:
5f2c7782cd8a Refactoring: `genshi.template` is now a package, it was getting way to crowded in that file. cmlenz parents: diff changeset	436 lineno = 1
5f2c7782cd8a Refactoring: `genshi.template` is now a package, it was getting way to crowded in that file. cmlenz parents: diff changeset	437
820 1837f39efd6f Sync (old) experimental inline branch with trunk@1027. cmlenz parents: 500 diff changeset	438 if xform is None:
1837f39efd6f Sync (old) experimental inline branch with trunk@1027. cmlenz parents: 500 diff changeset	439 xform = {
1837f39efd6f Sync (old) experimental inline branch with trunk@1027. cmlenz parents: 500 diff changeset	440 'eval': ExpressionASTTransformer
1837f39efd6f Sync (old) experimental inline branch with trunk@1027. cmlenz parents: 500 diff changeset	441 }.get(mode, TemplateASTTransformer)
1837f39efd6f Sync (old) experimental inline branch with trunk@1027. cmlenz parents: 500 diff changeset	442 tree = xform().visit(node)
1837f39efd6f Sync (old) experimental inline branch with trunk@1027. cmlenz parents: 500 diff changeset	443
500 0742f421caba Merged revisions 487-603 via svnmerge from cmlenz parents: 398 diff changeset	444 if mode == 'eval':
820 1837f39efd6f Sync (old) experimental inline branch with trunk@1027. cmlenz parents: 500 diff changeset	445 name = '<Expression %r>' % (source or '?')
500 0742f421caba Merged revisions 487-603 via svnmerge from cmlenz parents: 398 diff changeset	446 else:
820 1837f39efd6f Sync (old) experimental inline branch with trunk@1027. cmlenz parents: 500 diff changeset	447 lines = source.splitlines()
1837f39efd6f Sync (old) experimental inline branch with trunk@1027. cmlenz parents: 500 diff changeset	448 if not lines:
1837f39efd6f Sync (old) experimental inline branch with trunk@1027. cmlenz parents: 500 diff changeset	449 extract = ''
1837f39efd6f Sync (old) experimental inline branch with trunk@1027. cmlenz parents: 500 diff changeset	450 else:
1837f39efd6f Sync (old) experimental inline branch with trunk@1027. cmlenz parents: 500 diff changeset	451 extract = lines[0]
1837f39efd6f Sync (old) experimental inline branch with trunk@1027. cmlenz parents: 500 diff changeset	452 if len(lines) > 1:
1837f39efd6f Sync (old) experimental inline branch with trunk@1027. cmlenz parents: 500 diff changeset	453 extract += ' ...'
1837f39efd6f Sync (old) experimental inline branch with trunk@1027. cmlenz parents: 500 diff changeset	454 name = '<Suite %r>' % (extract)
1837f39efd6f Sync (old) experimental inline branch with trunk@1027. cmlenz parents: 500 diff changeset	455 new_source = ASTCodeGenerator(tree).code
1837f39efd6f Sync (old) experimental inline branch with trunk@1027. cmlenz parents: 500 diff changeset	456 code = compile(new_source, filename, mode)
336 5f2c7782cd8a Refactoring: `genshi.template` is now a package, it was getting way to crowded in that file. cmlenz parents: diff changeset	457
820 1837f39efd6f Sync (old) experimental inline branch with trunk@1027. cmlenz parents: 500 diff changeset	458 try:
1837f39efd6f Sync (old) experimental inline branch with trunk@1027. cmlenz parents: 500 diff changeset	459 # We'd like to just set co_firstlineno, but it's readonly. So we need
1837f39efd6f Sync (old) experimental inline branch with trunk@1027. cmlenz parents: 500 diff changeset	460 # to clone the code object while adjusting the line number
1837f39efd6f Sync (old) experimental inline branch with trunk@1027. cmlenz parents: 500 diff changeset	461 return CodeType(0, code.co_nlocals, code.co_stacksize,
1837f39efd6f Sync (old) experimental inline branch with trunk@1027. cmlenz parents: 500 diff changeset	462 code.co_flags \| 0x0040, code.co_code, code.co_consts,
1837f39efd6f Sync (old) experimental inline branch with trunk@1027. cmlenz parents: 500 diff changeset	463 code.co_names, code.co_varnames, filename, name,
1837f39efd6f Sync (old) experimental inline branch with trunk@1027. cmlenz parents: 500 diff changeset	464 lineno, code.co_lnotab, (), ())
1837f39efd6f Sync (old) experimental inline branch with trunk@1027. cmlenz parents: 500 diff changeset	465 except RuntimeError:
1837f39efd6f Sync (old) experimental inline branch with trunk@1027. cmlenz parents: 500 diff changeset	466 return code
1837f39efd6f Sync (old) experimental inline branch with trunk@1027. cmlenz parents: 500 diff changeset	467
1837f39efd6f Sync (old) experimental inline branch with trunk@1027. cmlenz parents: 500 diff changeset	468
1837f39efd6f Sync (old) experimental inline branch with trunk@1027. cmlenz parents: 500 diff changeset	469 def _new(class_, args, *kwargs):
1837f39efd6f Sync (old) experimental inline branch with trunk@1027. cmlenz parents: 500 diff changeset	470 ret = class_()
1837f39efd6f Sync (old) experimental inline branch with trunk@1027. cmlenz parents: 500 diff changeset	471 for attr, value in zip(ret._fields, args):
1837f39efd6f Sync (old) experimental inline branch with trunk@1027. cmlenz parents: 500 diff changeset	472 if attr in kwargs:
1837f39efd6f Sync (old) experimental inline branch with trunk@1027. cmlenz parents: 500 diff changeset	473 raise ValueError('Field set both in args and kwargs')
1837f39efd6f Sync (old) experimental inline branch with trunk@1027. cmlenz parents: 500 diff changeset	474 setattr(ret, attr, value)
1837f39efd6f Sync (old) experimental inline branch with trunk@1027. cmlenz parents: 500 diff changeset	475 for attr, value in kwargs:
1837f39efd6f Sync (old) experimental inline branch with trunk@1027. cmlenz parents: 500 diff changeset	476 setattr(ret, attr, value)
1837f39efd6f Sync (old) experimental inline branch with trunk@1027. cmlenz parents: 500 diff changeset	477 return ret
1837f39efd6f Sync (old) experimental inline branch with trunk@1027. cmlenz parents: 500 diff changeset	478
336 5f2c7782cd8a Refactoring: `genshi.template` is now a package, it was getting way to crowded in that file. cmlenz parents: diff changeset	479
5f2c7782cd8a Refactoring: `genshi.template` is now a package, it was getting way to crowded in that file. cmlenz parents: diff changeset	480 BUILTINS = __builtin__.__dict__.copy()
500 0742f421caba Merged revisions 487-603 via svnmerge from cmlenz parents: 398 diff changeset	481 BUILTINS.update({'Markup': Markup, 'Undefined': Undefined})
820 1837f39efd6f Sync (old) experimental inline branch with trunk@1027. cmlenz parents: 500 diff changeset	482 CONSTANTS = frozenset(['False', 'True', 'None', 'NotImplemented', 'Ellipsis'])
336 5f2c7782cd8a Refactoring: `genshi.template` is now a package, it was getting way to crowded in that file. cmlenz parents: diff changeset	483
5f2c7782cd8a Refactoring: `genshi.template` is now a package, it was getting way to crowded in that file. cmlenz parents: diff changeset	484
500 0742f421caba Merged revisions 487-603 via svnmerge from cmlenz parents: 398 diff changeset	485 class TemplateASTTransformer(ASTTransformer):
336 5f2c7782cd8a Refactoring: `genshi.template` is now a package, it was getting way to crowded in that file. cmlenz parents: diff changeset	486 """Concrete AST transformer that implements the AST transformations needed
500 0742f421caba Merged revisions 487-603 via svnmerge from cmlenz parents: 398 diff changeset	487 for code embedded in templates.
336 5f2c7782cd8a Refactoring: `genshi.template` is now a package, it was getting way to crowded in that file. cmlenz parents: diff changeset	488 """
5f2c7782cd8a Refactoring: `genshi.template` is now a package, it was getting way to crowded in that file. cmlenz parents: diff changeset	489
358 028a9a50d95a inline branch: Merged [437]. cmlenz parents: 344 diff changeset	490 def __init__(self):
820 1837f39efd6f Sync (old) experimental inline branch with trunk@1027. cmlenz parents: 500 diff changeset	491 self.locals = [CONSTANTS]
500 0742f421caba Merged revisions 487-603 via svnmerge from cmlenz parents: 398 diff changeset	492
820 1837f39efd6f Sync (old) experimental inline branch with trunk@1027. cmlenz parents: 500 diff changeset	493 def _extract_names(self, node):
1837f39efd6f Sync (old) experimental inline branch with trunk@1027. cmlenz parents: 500 diff changeset	494 names = set()
1837f39efd6f Sync (old) experimental inline branch with trunk@1027. cmlenz parents: 500 diff changeset	495 def _process(node):
1837f39efd6f Sync (old) experimental inline branch with trunk@1027. cmlenz parents: 500 diff changeset	496 if isinstance(node, _ast.Name):
1837f39efd6f Sync (old) experimental inline branch with trunk@1027. cmlenz parents: 500 diff changeset	497 names.add(node.id)
1837f39efd6f Sync (old) experimental inline branch with trunk@1027. cmlenz parents: 500 diff changeset	498 elif isinstance(node, _ast.alias):
1837f39efd6f Sync (old) experimental inline branch with trunk@1027. cmlenz parents: 500 diff changeset	499 names.add(node.asname or node.name)
1837f39efd6f Sync (old) experimental inline branch with trunk@1027. cmlenz parents: 500 diff changeset	500 elif isinstance(node, _ast.Tuple):
1837f39efd6f Sync (old) experimental inline branch with trunk@1027. cmlenz parents: 500 diff changeset	501 for elt in node.elts:
902 09cc3627654c Sync `experimental/inline` branch with [source:trunk@1126]. cmlenz parents: 830 diff changeset	502 _process(elt)
820 1837f39efd6f Sync (old) experimental inline branch with trunk@1027. cmlenz parents: 500 diff changeset	503 if hasattr(node, 'args'):
1837f39efd6f Sync (old) experimental inline branch with trunk@1027. cmlenz parents: 500 diff changeset	504 for arg in node.args:
1837f39efd6f Sync (old) experimental inline branch with trunk@1027. cmlenz parents: 500 diff changeset	505 _process(arg)
1837f39efd6f Sync (old) experimental inline branch with trunk@1027. cmlenz parents: 500 diff changeset	506 if hasattr(node, 'vararg'):
1837f39efd6f Sync (old) experimental inline branch with trunk@1027. cmlenz parents: 500 diff changeset	507 names.add(node.vararg)
1837f39efd6f Sync (old) experimental inline branch with trunk@1027. cmlenz parents: 500 diff changeset	508 if hasattr(node, 'kwarg'):
1837f39efd6f Sync (old) experimental inline branch with trunk@1027. cmlenz parents: 500 diff changeset	509 names.add(node.kwarg)
1837f39efd6f Sync (old) experimental inline branch with trunk@1027. cmlenz parents: 500 diff changeset	510 elif hasattr(node, 'names'):
1837f39efd6f Sync (old) experimental inline branch with trunk@1027. cmlenz parents: 500 diff changeset	511 for elt in node.names:
1837f39efd6f Sync (old) experimental inline branch with trunk@1027. cmlenz parents: 500 diff changeset	512 _process(elt)
1837f39efd6f Sync (old) experimental inline branch with trunk@1027. cmlenz parents: 500 diff changeset	513 return names
500 0742f421caba Merged revisions 487-603 via svnmerge from cmlenz parents: 398 diff changeset	514
820 1837f39efd6f Sync (old) experimental inline branch with trunk@1027. cmlenz parents: 500 diff changeset	515 def visit_Str(self, node):
1837f39efd6f Sync (old) experimental inline branch with trunk@1027. cmlenz parents: 500 diff changeset	516 if isinstance(node.s, str):
1837f39efd6f Sync (old) experimental inline branch with trunk@1027. cmlenz parents: 500 diff changeset	517 try: # If the string is ASCII, return a `str` object
1837f39efd6f Sync (old) experimental inline branch with trunk@1027. cmlenz parents: 500 diff changeset	518 node.s.decode('ascii')
1837f39efd6f Sync (old) experimental inline branch with trunk@1027. cmlenz parents: 500 diff changeset	519 except ValueError: # Otherwise return a `unicode` object
1837f39efd6f Sync (old) experimental inline branch with trunk@1027. cmlenz parents: 500 diff changeset	520 return _new(_ast.Str, node.s.decode('utf-8'))
500 0742f421caba Merged revisions 487-603 via svnmerge from cmlenz parents: 398 diff changeset	521 return node
0742f421caba Merged revisions 487-603 via svnmerge from cmlenz parents: 398 diff changeset	522
820 1837f39efd6f Sync (old) experimental inline branch with trunk@1027. cmlenz parents: 500 diff changeset	523 def visit_ClassDef(self, node):
1837f39efd6f Sync (old) experimental inline branch with trunk@1027. cmlenz parents: 500 diff changeset	524 if len(self.locals) > 1:
1837f39efd6f Sync (old) experimental inline branch with trunk@1027. cmlenz parents: 500 diff changeset	525 self.locals[-1].add(node.name)
358 028a9a50d95a inline branch: Merged [437]. cmlenz parents: 344 diff changeset	526 self.locals.append(set())
820 1837f39efd6f Sync (old) experimental inline branch with trunk@1027. cmlenz parents: 500 diff changeset	527 try:
1837f39efd6f Sync (old) experimental inline branch with trunk@1027. cmlenz parents: 500 diff changeset	528 return ASTTransformer.visit_ClassDef(self, node)
1837f39efd6f Sync (old) experimental inline branch with trunk@1027. cmlenz parents: 500 diff changeset	529 finally:
1837f39efd6f Sync (old) experimental inline branch with trunk@1027. cmlenz parents: 500 diff changeset	530 self.locals.pop()
336 5f2c7782cd8a Refactoring: `genshi.template` is now a package, it was getting way to crowded in that file. cmlenz parents: diff changeset	531
820 1837f39efd6f Sync (old) experimental inline branch with trunk@1027. cmlenz parents: 500 diff changeset	532 def visit_Import(self, node):
1837f39efd6f Sync (old) experimental inline branch with trunk@1027. cmlenz parents: 500 diff changeset	533 if len(self.locals) > 1:
1837f39efd6f Sync (old) experimental inline branch with trunk@1027. cmlenz parents: 500 diff changeset	534 self.locals[-1].update(self._extract_names(node))
1837f39efd6f Sync (old) experimental inline branch with trunk@1027. cmlenz parents: 500 diff changeset	535 return ASTTransformer.visit_Import(self, node)
336 5f2c7782cd8a Refactoring: `genshi.template` is now a package, it was getting way to crowded in that file. cmlenz parents: diff changeset	536
820 1837f39efd6f Sync (old) experimental inline branch with trunk@1027. cmlenz parents: 500 diff changeset	537 def visit_ImportFrom(self, node):
1837f39efd6f Sync (old) experimental inline branch with trunk@1027. cmlenz parents: 500 diff changeset	538 if [a.name for a in node.names] == ['*']:
1837f39efd6f Sync (old) experimental inline branch with trunk@1027. cmlenz parents: 500 diff changeset	539 if has_star_import_bug:
1837f39efd6f Sync (old) experimental inline branch with trunk@1027. cmlenz parents: 500 diff changeset	540 # This is a Python 2.4 bug. Only if we have a broken Python
1837f39efd6f Sync (old) experimental inline branch with trunk@1027. cmlenz parents: 500 diff changeset	541 # version do we need to apply this hack
1837f39efd6f Sync (old) experimental inline branch with trunk@1027. cmlenz parents: 500 diff changeset	542 node = _new(_ast.Expr, _new(_ast.Call,
1837f39efd6f Sync (old) experimental inline branch with trunk@1027. cmlenz parents: 500 diff changeset	543 _new(_ast.Name, '_star_import_patch'), [
1837f39efd6f Sync (old) experimental inline branch with trunk@1027. cmlenz parents: 500 diff changeset	544 _new(_ast.Name, '__data__'),
1837f39efd6f Sync (old) experimental inline branch with trunk@1027. cmlenz parents: 500 diff changeset	545 _new(_ast.Str, node.module)
1837f39efd6f Sync (old) experimental inline branch with trunk@1027. cmlenz parents: 500 diff changeset	546 ], (), ()))
1837f39efd6f Sync (old) experimental inline branch with trunk@1027. cmlenz parents: 500 diff changeset	547 return node
1837f39efd6f Sync (old) experimental inline branch with trunk@1027. cmlenz parents: 500 diff changeset	548 if len(self.locals) > 1:
1837f39efd6f Sync (old) experimental inline branch with trunk@1027. cmlenz parents: 500 diff changeset	549 self.locals[-1].update(self._extract_names(node))
1837f39efd6f Sync (old) experimental inline branch with trunk@1027. cmlenz parents: 500 diff changeset	550 return ASTTransformer.visit_ImportFrom(self, node)
358 028a9a50d95a inline branch: Merged [437]. cmlenz parents: 344 diff changeset	551
820 1837f39efd6f Sync (old) experimental inline branch with trunk@1027. cmlenz parents: 500 diff changeset	552 def visit_FunctionDef(self, node):
1837f39efd6f Sync (old) experimental inline branch with trunk@1027. cmlenz parents: 500 diff changeset	553 if len(self.locals) > 1:
1837f39efd6f Sync (old) experimental inline branch with trunk@1027. cmlenz parents: 500 diff changeset	554 self.locals[-1].add(node.name)
1837f39efd6f Sync (old) experimental inline branch with trunk@1027. cmlenz parents: 500 diff changeset	555
1837f39efd6f Sync (old) experimental inline branch with trunk@1027. cmlenz parents: 500 diff changeset	556 self.locals.append(self._extract_names(node.args))
1837f39efd6f Sync (old) experimental inline branch with trunk@1027. cmlenz parents: 500 diff changeset	557 try:
1837f39efd6f Sync (old) experimental inline branch with trunk@1027. cmlenz parents: 500 diff changeset	558 return ASTTransformer.visit_FunctionDef(self, node)
1837f39efd6f Sync (old) experimental inline branch with trunk@1027. cmlenz parents: 500 diff changeset	559 finally:
1837f39efd6f Sync (old) experimental inline branch with trunk@1027. cmlenz parents: 500 diff changeset	560 self.locals.pop()
1837f39efd6f Sync (old) experimental inline branch with trunk@1027. cmlenz parents: 500 diff changeset	561
1837f39efd6f Sync (old) experimental inline branch with trunk@1027. cmlenz parents: 500 diff changeset	562 # GeneratorExp(expr elt, comprehension* generators)
1837f39efd6f Sync (old) experimental inline branch with trunk@1027. cmlenz parents: 500 diff changeset	563 def visit_GeneratorExp(self, node):
1837f39efd6f Sync (old) experimental inline branch with trunk@1027. cmlenz parents: 500 diff changeset	564 gens = []
902 09cc3627654c Sync `experimental/inline` branch with [source:trunk@1126]. cmlenz parents: 830 diff changeset	565 for generator in node.generators:
820 1837f39efd6f Sync (old) experimental inline branch with trunk@1027. cmlenz parents: 500 diff changeset	566 # comprehension = (expr target, expr iter, expr* ifs)
1837f39efd6f Sync (old) experimental inline branch with trunk@1027. cmlenz parents: 500 diff changeset	567 self.locals.append(set())
1837f39efd6f Sync (old) experimental inline branch with trunk@1027. cmlenz parents: 500 diff changeset	568 gen = _new(_ast.comprehension, self.visit(generator.target),
902 09cc3627654c Sync `experimental/inline` branch with [source:trunk@1126]. cmlenz parents: 830 diff changeset	569 self.visit(generator.iter),
09cc3627654c Sync `experimental/inline` branch with [source:trunk@1126]. cmlenz parents: 830 diff changeset	570 [self.visit(if_) for if_ in generator.ifs])
820 1837f39efd6f Sync (old) experimental inline branch with trunk@1027. cmlenz parents: 500 diff changeset	571 gens.append(gen)
1837f39efd6f Sync (old) experimental inline branch with trunk@1027. cmlenz parents: 500 diff changeset	572
1837f39efd6f Sync (old) experimental inline branch with trunk@1027. cmlenz parents: 500 diff changeset	573 # use node.__class__ to make it reusable as ListComp
1837f39efd6f Sync (old) experimental inline branch with trunk@1027. cmlenz parents: 500 diff changeset	574 ret = _new(node.__class__, self.visit(node.elt), gens)
1837f39efd6f Sync (old) experimental inline branch with trunk@1027. cmlenz parents: 500 diff changeset	575 #delete inserted locals
1837f39efd6f Sync (old) experimental inline branch with trunk@1027. cmlenz parents: 500 diff changeset	576 del self.locals[-len(node.generators):]
1837f39efd6f Sync (old) experimental inline branch with trunk@1027. cmlenz parents: 500 diff changeset	577 return ret
1837f39efd6f Sync (old) experimental inline branch with trunk@1027. cmlenz parents: 500 diff changeset	578
1837f39efd6f Sync (old) experimental inline branch with trunk@1027. cmlenz parents: 500 diff changeset	579 # ListComp(expr elt, comprehension* generators)
1837f39efd6f Sync (old) experimental inline branch with trunk@1027. cmlenz parents: 500 diff changeset	580 visit_ListComp = visit_GeneratorExp
1837f39efd6f Sync (old) experimental inline branch with trunk@1027. cmlenz parents: 500 diff changeset	581
1837f39efd6f Sync (old) experimental inline branch with trunk@1027. cmlenz parents: 500 diff changeset	582 def visit_Lambda(self, node):
1837f39efd6f Sync (old) experimental inline branch with trunk@1027. cmlenz parents: 500 diff changeset	583 self.locals.append(self._extract_names(node.args))
1837f39efd6f Sync (old) experimental inline branch with trunk@1027. cmlenz parents: 500 diff changeset	584 try:
1837f39efd6f Sync (old) experimental inline branch with trunk@1027. cmlenz parents: 500 diff changeset	585 return ASTTransformer.visit_Lambda(self, node)
1837f39efd6f Sync (old) experimental inline branch with trunk@1027. cmlenz parents: 500 diff changeset	586 finally:
1837f39efd6f Sync (old) experimental inline branch with trunk@1027. cmlenz parents: 500 diff changeset	587 self.locals.pop()
1837f39efd6f Sync (old) experimental inline branch with trunk@1027. cmlenz parents: 500 diff changeset	588
1837f39efd6f Sync (old) experimental inline branch with trunk@1027. cmlenz parents: 500 diff changeset	589 def visit_Name(self, node):
358 028a9a50d95a inline branch: Merged [437]. cmlenz parents: 344 diff changeset	590 # If the name refers to a local inside a lambda, list comprehension, or
028a9a50d95a inline branch: Merged [437]. cmlenz parents: 344 diff changeset	591 # generator expression, leave it alone
820 1837f39efd6f Sync (old) experimental inline branch with trunk@1027. cmlenz parents: 500 diff changeset	592 if isinstance(node.ctx, _ast.Load) and \
1837f39efd6f Sync (old) experimental inline branch with trunk@1027. cmlenz parents: 500 diff changeset	593 node.id not in flatten(self.locals):
1837f39efd6f Sync (old) experimental inline branch with trunk@1027. cmlenz parents: 500 diff changeset	594 # Otherwise, translate the name ref into a context lookup
1837f39efd6f Sync (old) experimental inline branch with trunk@1027. cmlenz parents: 500 diff changeset	595 name = _new(_ast.Name, '_lookup_name', _ast.Load())
1837f39efd6f Sync (old) experimental inline branch with trunk@1027. cmlenz parents: 500 diff changeset	596 namearg = _new(_ast.Name, '__data__', _ast.Load())
1837f39efd6f Sync (old) experimental inline branch with trunk@1027. cmlenz parents: 500 diff changeset	597 strarg = _new(_ast.Str, node.id)
1837f39efd6f Sync (old) experimental inline branch with trunk@1027. cmlenz parents: 500 diff changeset	598 node = _new(_ast.Call, name, [namearg, strarg], [])
1837f39efd6f Sync (old) experimental inline branch with trunk@1027. cmlenz parents: 500 diff changeset	599 elif isinstance(node.ctx, _ast.Store):
1837f39efd6f Sync (old) experimental inline branch with trunk@1027. cmlenz parents: 500 diff changeset	600 if len(self.locals) > 1:
1837f39efd6f Sync (old) experimental inline branch with trunk@1027. cmlenz parents: 500 diff changeset	601 self.locals[-1].add(node.id)
1837f39efd6f Sync (old) experimental inline branch with trunk@1027. cmlenz parents: 500 diff changeset	602
1837f39efd6f Sync (old) experimental inline branch with trunk@1027. cmlenz parents: 500 diff changeset	603 return node
336 5f2c7782cd8a Refactoring: `genshi.template` is now a package, it was getting way to crowded in that file. cmlenz parents: diff changeset	604
500 0742f421caba Merged revisions 487-603 via svnmerge from cmlenz parents: 398 diff changeset	605
0742f421caba Merged revisions 487-603 via svnmerge from cmlenz parents: 398 diff changeset	606 class ExpressionASTTransformer(TemplateASTTransformer):
0742f421caba Merged revisions 487-603 via svnmerge from cmlenz parents: 398 diff changeset	607 """Concrete AST transformer that implements the AST transformations needed
0742f421caba Merged revisions 487-603 via svnmerge from cmlenz parents: 398 diff changeset	608 for code embedded in templates.
0742f421caba Merged revisions 487-603 via svnmerge from cmlenz parents: 398 diff changeset	609 """
0742f421caba Merged revisions 487-603 via svnmerge from cmlenz parents: 398 diff changeset	610
820 1837f39efd6f Sync (old) experimental inline branch with trunk@1027. cmlenz parents: 500 diff changeset	611 def visit_Attribute(self, node):
1837f39efd6f Sync (old) experimental inline branch with trunk@1027. cmlenz parents: 500 diff changeset	612 if not isinstance(node.ctx, _ast.Load):
1837f39efd6f Sync (old) experimental inline branch with trunk@1027. cmlenz parents: 500 diff changeset	613 return ASTTransformer.visit_Attribute(self, node)
500 0742f421caba Merged revisions 487-603 via svnmerge from cmlenz parents: 398 diff changeset	614
820 1837f39efd6f Sync (old) experimental inline branch with trunk@1027. cmlenz parents: 500 diff changeset	615 func = _new(_ast.Name, '_lookup_attr', _ast.Load())
1837f39efd6f Sync (old) experimental inline branch with trunk@1027. cmlenz parents: 500 diff changeset	616 args = [self.visit(node.value), _new(_ast.Str, node.attr)]
1837f39efd6f Sync (old) experimental inline branch with trunk@1027. cmlenz parents: 500 diff changeset	617 return _new(_ast.Call, func, args, [])
1837f39efd6f Sync (old) experimental inline branch with trunk@1027. cmlenz parents: 500 diff changeset	618
1837f39efd6f Sync (old) experimental inline branch with trunk@1027. cmlenz parents: 500 diff changeset	619 def visit_Subscript(self, node):
1837f39efd6f Sync (old) experimental inline branch with trunk@1027. cmlenz parents: 500 diff changeset	620 if not isinstance(node.ctx, _ast.Load) or \
1837f39efd6f Sync (old) experimental inline branch with trunk@1027. cmlenz parents: 500 diff changeset	621 not isinstance(node.slice, _ast.Index):
1837f39efd6f Sync (old) experimental inline branch with trunk@1027. cmlenz parents: 500 diff changeset	622 return ASTTransformer.visit_Subscript(self, node)
1837f39efd6f Sync (old) experimental inline branch with trunk@1027. cmlenz parents: 500 diff changeset	623
1837f39efd6f Sync (old) experimental inline branch with trunk@1027. cmlenz parents: 500 diff changeset	624 func = _new(_ast.Name, '_lookup_item', _ast.Load())
1837f39efd6f Sync (old) experimental inline branch with trunk@1027. cmlenz parents: 500 diff changeset	625 args = [
1837f39efd6f Sync (old) experimental inline branch with trunk@1027. cmlenz parents: 500 diff changeset	626 self.visit(node.value),
1837f39efd6f Sync (old) experimental inline branch with trunk@1027. cmlenz parents: 500 diff changeset	627 _new(_ast.Tuple, (self.visit(node.slice.value),), _ast.Load())
1837f39efd6f Sync (old) experimental inline branch with trunk@1027. cmlenz parents: 500 diff changeset	628 ]
1837f39efd6f Sync (old) experimental inline branch with trunk@1027. cmlenz parents: 500 diff changeset	629 return _new(_ast.Call, func, args, [])

Mercurial > genshi > genshi-test

annotate genshi/template/eval.py @ 903:95d62e239f60 experimental-inline