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# -*- coding: utf-8 -*-
# This program is free software; you can redistribute it and/or modify it under
# the terms of the GNU General Public License as published by the Free Software
# Foundation; either version 2 of the License, or (at your option) any later
# version.
#
# This program is distributed in the hope that it will be useful, but WITHOUT
# ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
# FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License along with
# this program; if not, write to the Free Software Foundation, Inc.,
# 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
"""
Module containing the node classes; it is only used for avoiding circular imports
"""
from __future__ import generators
__docformat__ = "restructuredtext en"
from itertools import imap
try:
from logilab.astng._nodes_ast import *
from logilab.astng._nodes_ast import _const_factory
AST_MODE = '_ast'
except ImportError:
from logilab.astng._nodes_compiler import *
from logilab.astng._nodes_compiler import _const_factory
AST_MODE = 'compiler'
INFER_NEED_NAME_STMTS = (From, Import, Global, TryExcept)
LOOP_SCOPES = (Comprehension, For,)
STMT_NODES = (
Assert, Assign, AugAssign, Break, Class, Continue, Delete, Discard,
ExceptHandler, Exec, For, From, Function, Global, If, Import, Pass, Print,
Raise, Return, TryExcept, TryFinally, While, With, Yield
)
ALL_NODES = STMT_NODES + (
Arguments, AssAttr, AssName, BinOp, BoolOp, Backquote, CallFunc, Compare,
Comprehension, Const, Decorators, DelAttr, DelName, Dict, Ellipsis,
EmptyNode, ExtSlice, Getattr, GenExpr, IfExp, Index, Keyword, Lambda,
List, ListComp, Module, Name, Slice, Subscript, UnaryOp, Tuple
)
# constants ... ##############################################################
CONST_CLS = {
list: List,
tuple: Tuple,
dict: Dict,
}
def const_factory(value):
"""return an astng node for a python value"""
try:
# if value is of class list, tuple, dict use specific class, not Const
cls = CONST_CLS[value.__class__]
node = cls()
if isinstance(node, Dict):
node.items = ()
else:
node.elts = ()
except KeyError:
try:
node = Const(value)
except KeyError:
node = _const_factory(value)
return node
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