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0d6615fd29
method still needs to support string exceptions, and allow None for the third argument. Documentation updates are needed, too.
1446 lines
48 KiB
Python
1446 lines
48 KiB
Python
"""Parse tree transformation module.
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Transforms Python source code into an abstract syntax tree (AST)
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defined in the ast module.
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The simplest ways to invoke this module are via parse and parseFile.
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parse(buf) -> AST
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parseFile(path) -> AST
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"""
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# Original version written by Greg Stein (gstein@lyra.org)
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# and Bill Tutt (rassilon@lima.mudlib.org)
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# February 1997.
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#
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# Modifications and improvements for Python 2.0 by Jeremy Hylton and
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# Mark Hammond
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#
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# Some fixes to try to have correct line number on almost all nodes
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# (except Module, Discard and Stmt) added by Sylvain Thenault
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#
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# Portions of this file are:
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# Copyright (C) 1997-1998 Greg Stein. All Rights Reserved.
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#
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# This module is provided under a BSD-ish license. See
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# http://www.opensource.org/licenses/bsd-license.html
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# and replace OWNER, ORGANIZATION, and YEAR as appropriate.
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from compiler.ast import *
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import parser
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import symbol
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import token
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import sys
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class WalkerError(StandardError):
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pass
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from consts import CO_VARARGS, CO_VARKEYWORDS
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from consts import OP_ASSIGN, OP_DELETE, OP_APPLY
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def parseFile(path):
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f = open(path, "U")
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# XXX The parser API tolerates files without a trailing newline,
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# but not strings without a trailing newline. Always add an extra
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# newline to the file contents, since we're going through the string
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# version of the API.
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src = f.read() + "\n"
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f.close()
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return parse(src)
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def parse(buf, mode="exec"):
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if mode == "exec" or mode == "single":
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return Transformer().parsesuite(buf)
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elif mode == "eval":
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return Transformer().parseexpr(buf)
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else:
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raise ValueError("compile() arg 3 must be"
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" 'exec' or 'eval' or 'single'")
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def asList(nodes):
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l = []
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for item in nodes:
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if hasattr(item, "asList"):
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l.append(item.asList())
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else:
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if type(item) is type( (None, None) ):
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l.append(tuple(asList(item)))
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elif type(item) is type( [] ):
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l.append(asList(item))
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else:
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l.append(item)
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return l
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def extractLineNo(ast):
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if not isinstance(ast[1], tuple):
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# get a terminal node
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return ast[2]
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for child in ast[1:]:
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if isinstance(child, tuple):
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lineno = extractLineNo(child)
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if lineno is not None:
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return lineno
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def Node(*args):
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kind = args[0]
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if nodes.has_key(kind):
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try:
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return nodes[kind](*args[1:])
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except TypeError:
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print nodes[kind], len(args), args
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raise
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else:
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raise WalkerError, "Can't find appropriate Node type: %s" % str(args)
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#return apply(ast.Node, args)
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class Transformer:
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"""Utility object for transforming Python parse trees.
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Exposes the following methods:
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tree = transform(ast_tree)
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tree = parsesuite(text)
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tree = parseexpr(text)
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tree = parsefile(fileob | filename)
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"""
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def __init__(self):
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self._dispatch = {}
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for value, name in symbol.sym_name.items():
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if hasattr(self, name):
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self._dispatch[value] = getattr(self, name)
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self._dispatch[token.NEWLINE] = self.com_NEWLINE
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self._atom_dispatch = {token.LPAR: self.atom_lpar,
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token.LSQB: self.atom_lsqb,
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token.LBRACE: self.atom_lbrace,
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token.BACKQUOTE: self.atom_backquote,
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token.NUMBER: self.atom_number,
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token.STRING: self.atom_string,
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token.NAME: self.atom_name,
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}
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self.encoding = None
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def transform(self, tree):
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"""Transform an AST into a modified parse tree."""
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if not (isinstance(tree, tuple) or isinstance(tree, list)):
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tree = parser.ast2tuple(tree, line_info=1)
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return self.compile_node(tree)
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def parsesuite(self, text):
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"""Return a modified parse tree for the given suite text."""
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return self.transform(parser.suite(text))
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def parseexpr(self, text):
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"""Return a modified parse tree for the given expression text."""
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return self.transform(parser.expr(text))
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def parsefile(self, file):
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"""Return a modified parse tree for the contents of the given file."""
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if type(file) == type(''):
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file = open(file)
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return self.parsesuite(file.read())
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# --------------------------------------------------------------
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#
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# PRIVATE METHODS
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#
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def compile_node(self, node):
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### emit a line-number node?
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n = node[0]
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if n == symbol.encoding_decl:
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self.encoding = node[2]
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node = node[1]
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n = node[0]
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if n == symbol.single_input:
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return self.single_input(node[1:])
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if n == symbol.file_input:
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return self.file_input(node[1:])
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if n == symbol.eval_input:
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return self.eval_input(node[1:])
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if n == symbol.lambdef:
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return self.lambdef(node[1:])
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if n == symbol.funcdef:
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return self.funcdef(node[1:])
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if n == symbol.classdef:
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return self.classdef(node[1:])
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raise WalkerError, ('unexpected node type', n)
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def single_input(self, node):
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### do we want to do anything about being "interactive" ?
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# NEWLINE | simple_stmt | compound_stmt NEWLINE
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n = node[0][0]
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if n != token.NEWLINE:
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return self.com_stmt(node[0])
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return Pass()
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def file_input(self, nodelist):
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doc = self.get_docstring(nodelist, symbol.file_input)
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if doc is not None:
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i = 1
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else:
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i = 0
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stmts = []
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for node in nodelist[i:]:
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if node[0] != token.ENDMARKER and node[0] != token.NEWLINE:
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self.com_append_stmt(stmts, node)
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return Module(doc, Stmt(stmts))
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def eval_input(self, nodelist):
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# from the built-in function input()
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### is this sufficient?
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return Expression(self.com_node(nodelist[0]))
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def decorator_name(self, nodelist):
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listlen = len(nodelist)
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assert listlen >= 1 and listlen % 2 == 1
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item = self.atom_name(nodelist)
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i = 1
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while i < listlen:
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assert nodelist[i][0] == token.DOT
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assert nodelist[i + 1][0] == token.NAME
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item = Getattr(item, nodelist[i + 1][1])
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i += 2
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return item
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def decorator(self, nodelist):
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# '@' dotted_name [ '(' [arglist] ')' ]
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assert len(nodelist) in (3, 5, 6)
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assert nodelist[0][0] == token.AT
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assert nodelist[-1][0] == token.NEWLINE
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assert nodelist[1][0] == symbol.dotted_name
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funcname = self.decorator_name(nodelist[1][1:])
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if len(nodelist) > 3:
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assert nodelist[2][0] == token.LPAR
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expr = self.com_call_function(funcname, nodelist[3])
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else:
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expr = funcname
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return expr
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def decorators(self, nodelist):
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# decorators: decorator ([NEWLINE] decorator)* NEWLINE
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items = []
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for dec_nodelist in nodelist:
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assert dec_nodelist[0] == symbol.decorator
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items.append(self.decorator(dec_nodelist[1:]))
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return Decorators(items)
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def funcdef(self, nodelist):
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# -6 -5 -4 -3 -2 -1
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# funcdef: [decorators] 'def' NAME parameters ':' suite
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# parameters: '(' [varargslist] ')'
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if len(nodelist) == 6:
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assert nodelist[0][0] == symbol.decorators
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decorators = self.decorators(nodelist[0][1:])
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else:
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assert len(nodelist) == 5
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decorators = None
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lineno = nodelist[-4][2]
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name = nodelist[-4][1]
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args = nodelist[-3][2]
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if args[0] == symbol.varargslist:
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names, defaults, flags = self.com_arglist(args[1:])
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else:
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names = defaults = ()
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flags = 0
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doc = self.get_docstring(nodelist[-1])
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# code for function
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code = self.com_node(nodelist[-1])
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if doc is not None:
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assert isinstance(code, Stmt)
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assert isinstance(code.nodes[0], Discard)
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del code.nodes[0]
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return Function(decorators, name, names, defaults, flags, doc, code,
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lineno=lineno)
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def lambdef(self, nodelist):
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# lambdef: 'lambda' [varargslist] ':' test
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if nodelist[2][0] == symbol.varargslist:
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names, defaults, flags = self.com_arglist(nodelist[2][1:])
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else:
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names = defaults = ()
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flags = 0
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# code for lambda
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code = self.com_node(nodelist[-1])
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return Lambda(names, defaults, flags, code, lineno=nodelist[1][2])
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def classdef(self, nodelist):
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# classdef: 'class' NAME ['(' [testlist] ')'] ':' suite
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name = nodelist[1][1]
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doc = self.get_docstring(nodelist[-1])
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if nodelist[2][0] == token.COLON:
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bases = []
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elif nodelist[3][0] == token.RPAR:
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bases = []
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else:
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bases = self.com_bases(nodelist[3])
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# code for class
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code = self.com_node(nodelist[-1])
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if doc is not None:
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assert isinstance(code, Stmt)
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assert isinstance(code.nodes[0], Discard)
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del code.nodes[0]
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return Class(name, bases, doc, code, lineno=nodelist[1][2])
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def stmt(self, nodelist):
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return self.com_stmt(nodelist[0])
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small_stmt = stmt
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flow_stmt = stmt
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compound_stmt = stmt
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def simple_stmt(self, nodelist):
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# small_stmt (';' small_stmt)* [';'] NEWLINE
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stmts = []
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for i in range(0, len(nodelist), 2):
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self.com_append_stmt(stmts, nodelist[i])
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return Stmt(stmts)
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def parameters(self, nodelist):
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raise WalkerError
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def varargslist(self, nodelist):
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raise WalkerError
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def fpdef(self, nodelist):
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raise WalkerError
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def fplist(self, nodelist):
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raise WalkerError
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def dotted_name(self, nodelist):
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raise WalkerError
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def comp_op(self, nodelist):
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raise WalkerError
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def trailer(self, nodelist):
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raise WalkerError
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def sliceop(self, nodelist):
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raise WalkerError
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def argument(self, nodelist):
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raise WalkerError
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# --------------------------------------------------------------
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#
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# STATEMENT NODES (invoked by com_node())
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#
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def expr_stmt(self, nodelist):
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# augassign testlist | testlist ('=' testlist)*
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en = nodelist[-1]
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exprNode = self.lookup_node(en)(en[1:])
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if len(nodelist) == 1:
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return Discard(exprNode, lineno=exprNode.lineno)
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if nodelist[1][0] == token.EQUAL:
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nodesl = []
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for i in range(0, len(nodelist) - 2, 2):
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nodesl.append(self.com_assign(nodelist[i], OP_ASSIGN))
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return Assign(nodesl, exprNode, lineno=nodelist[1][2])
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else:
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lval = self.com_augassign(nodelist[0])
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op = self.com_augassign_op(nodelist[1])
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return AugAssign(lval, op[1], exprNode, lineno=op[2])
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raise WalkerError, "can't get here"
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def print_stmt(self, nodelist):
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# print ([ test (',' test)* [','] ] | '>>' test [ (',' test)+ [','] ])
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items = []
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if len(nodelist) == 1:
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start = 1
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dest = None
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elif nodelist[1][0] == token.RIGHTSHIFT:
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assert len(nodelist) == 3 \
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or nodelist[3][0] == token.COMMA
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dest = self.com_node(nodelist[2])
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start = 4
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else:
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dest = None
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start = 1
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for i in range(start, len(nodelist), 2):
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items.append(self.com_node(nodelist[i]))
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if nodelist[-1][0] == token.COMMA:
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return Print(items, dest, lineno=nodelist[0][2])
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return Printnl(items, dest, lineno=nodelist[0][2])
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def del_stmt(self, nodelist):
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return self.com_assign(nodelist[1], OP_DELETE)
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def pass_stmt(self, nodelist):
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return Pass(lineno=nodelist[0][2])
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def break_stmt(self, nodelist):
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return Break(lineno=nodelist[0][2])
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def continue_stmt(self, nodelist):
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return Continue(lineno=nodelist[0][2])
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def return_stmt(self, nodelist):
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# return: [testlist]
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if len(nodelist) < 2:
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return Return(Const(None), lineno=nodelist[0][2])
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return Return(self.com_node(nodelist[1]), lineno=nodelist[0][2])
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def yield_stmt(self, nodelist):
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expr = self.com_node(nodelist[0])
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return Discard(expr, lineno=expr.lineno)
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def yield_expr(self, nodelist):
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if len(nodelist)>1:
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value = nodelist[1]
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else:
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value = Const(None)
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return Yield(self.com_node(value), lineno=nodelist[0][2])
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def raise_stmt(self, nodelist):
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# raise: [test [',' test [',' test]]]
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if len(nodelist) > 5:
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expr3 = self.com_node(nodelist[5])
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else:
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expr3 = None
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if len(nodelist) > 3:
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expr2 = self.com_node(nodelist[3])
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else:
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expr2 = None
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if len(nodelist) > 1:
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expr1 = self.com_node(nodelist[1])
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else:
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expr1 = None
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return Raise(expr1, expr2, expr3, lineno=nodelist[0][2])
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def import_stmt(self, nodelist):
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# import_stmt: import_name | import_from
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assert len(nodelist) == 1
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return self.com_node(nodelist[0])
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def import_name(self, nodelist):
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# import_name: 'import' dotted_as_names
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return Import(self.com_dotted_as_names(nodelist[1]),
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lineno=nodelist[0][2])
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def import_from(self, nodelist):
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# import_from: 'from' dotted_name 'import' ('*' |
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# '(' import_as_names ')' | import_as_names)
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assert nodelist[0][1] == 'from'
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assert nodelist[1][0] == symbol.dotted_name
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assert nodelist[2][1] == 'import'
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fromname = self.com_dotted_name(nodelist[1])
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if nodelist[3][0] == token.STAR:
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return From(fromname, [('*', None)],
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lineno=nodelist[0][2])
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else:
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node = nodelist[3 + (nodelist[3][0] == token.LPAR)]
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return From(fromname, self.com_import_as_names(node),
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lineno=nodelist[0][2])
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def global_stmt(self, nodelist):
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# global: NAME (',' NAME)*
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names = []
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for i in range(1, len(nodelist), 2):
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names.append(nodelist[i][1])
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return Global(names, lineno=nodelist[0][2])
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def exec_stmt(self, nodelist):
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# exec_stmt: 'exec' expr ['in' expr [',' expr]]
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expr1 = self.com_node(nodelist[1])
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if len(nodelist) >= 4:
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expr2 = self.com_node(nodelist[3])
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if len(nodelist) >= 6:
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expr3 = self.com_node(nodelist[5])
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else:
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expr3 = None
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else:
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expr2 = expr3 = None
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return Exec(expr1, expr2, expr3, lineno=nodelist[0][2])
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def assert_stmt(self, nodelist):
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# 'assert': test, [',' test]
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expr1 = self.com_node(nodelist[1])
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if (len(nodelist) == 4):
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expr2 = self.com_node(nodelist[3])
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else:
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expr2 = None
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return Assert(expr1, expr2, lineno=nodelist[0][2])
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def if_stmt(self, nodelist):
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# if: test ':' suite ('elif' test ':' suite)* ['else' ':' suite]
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tests = []
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for i in range(0, len(nodelist) - 3, 4):
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testNode = self.com_node(nodelist[i + 1])
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suiteNode = self.com_node(nodelist[i + 3])
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tests.append((testNode, suiteNode))
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if len(nodelist) % 4 == 3:
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elseNode = self.com_node(nodelist[-1])
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## elseNode.lineno = nodelist[-1][1][2]
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else:
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elseNode = None
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return If(tests, elseNode, lineno=nodelist[0][2])
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def while_stmt(self, nodelist):
|
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# 'while' test ':' suite ['else' ':' suite]
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testNode = self.com_node(nodelist[1])
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bodyNode = self.com_node(nodelist[3])
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if len(nodelist) > 4:
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elseNode = self.com_node(nodelist[6])
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else:
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elseNode = None
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return While(testNode, bodyNode, elseNode, lineno=nodelist[0][2])
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|
def for_stmt(self, nodelist):
|
|
# 'for' exprlist 'in' exprlist ':' suite ['else' ':' suite]
|
|
|
|
assignNode = self.com_assign(nodelist[1], OP_ASSIGN)
|
|
listNode = self.com_node(nodelist[3])
|
|
bodyNode = self.com_node(nodelist[5])
|
|
|
|
if len(nodelist) > 8:
|
|
elseNode = self.com_node(nodelist[8])
|
|
else:
|
|
elseNode = None
|
|
|
|
return For(assignNode, listNode, bodyNode, elseNode,
|
|
lineno=nodelist[0][2])
|
|
|
|
def try_stmt(self, nodelist):
|
|
# 'try' ':' suite (except_clause ':' suite)+ ['else' ':' suite]
|
|
# | 'try' ':' suite 'finally' ':' suite
|
|
if nodelist[3][0] != symbol.except_clause:
|
|
return self.com_try_finally(nodelist)
|
|
|
|
return self.com_try_except(nodelist)
|
|
|
|
def suite(self, nodelist):
|
|
# simple_stmt | NEWLINE INDENT NEWLINE* (stmt NEWLINE*)+ DEDENT
|
|
if len(nodelist) == 1:
|
|
return self.com_stmt(nodelist[0])
|
|
|
|
stmts = []
|
|
for node in nodelist:
|
|
if node[0] == symbol.stmt:
|
|
self.com_append_stmt(stmts, node)
|
|
return Stmt(stmts)
|
|
|
|
# --------------------------------------------------------------
|
|
#
|
|
# EXPRESSION NODES (invoked by com_node())
|
|
#
|
|
|
|
def testlist(self, nodelist):
|
|
# testlist: expr (',' expr)* [',']
|
|
# testlist_safe: test [(',' test)+ [',']]
|
|
# exprlist: expr (',' expr)* [',']
|
|
return self.com_binary(Tuple, nodelist)
|
|
|
|
testlist_safe = testlist # XXX
|
|
testlist1 = testlist
|
|
exprlist = testlist
|
|
|
|
def testlist_gexp(self, nodelist):
|
|
if len(nodelist) == 2 and nodelist[1][0] == symbol.gen_for:
|
|
test = self.com_node(nodelist[0])
|
|
return self.com_generator_expression(test, nodelist[1])
|
|
return self.testlist(nodelist)
|
|
|
|
def test(self, nodelist):
|
|
# and_test ('or' and_test)* | lambdef
|
|
if len(nodelist) == 1 and nodelist[0][0] == symbol.lambdef:
|
|
return self.lambdef(nodelist[0])
|
|
return self.com_binary(Or, nodelist)
|
|
|
|
def and_test(self, nodelist):
|
|
# not_test ('and' not_test)*
|
|
return self.com_binary(And, nodelist)
|
|
|
|
def not_test(self, nodelist):
|
|
# 'not' not_test | comparison
|
|
result = self.com_node(nodelist[-1])
|
|
if len(nodelist) == 2:
|
|
return Not(result, lineno=nodelist[0][2])
|
|
return result
|
|
|
|
def comparison(self, nodelist):
|
|
# comparison: expr (comp_op expr)*
|
|
node = self.com_node(nodelist[0])
|
|
if len(nodelist) == 1:
|
|
return node
|
|
|
|
results = []
|
|
for i in range(2, len(nodelist), 2):
|
|
nl = nodelist[i-1]
|
|
|
|
# comp_op: '<' | '>' | '=' | '>=' | '<=' | '<>' | '!=' | '=='
|
|
# | 'in' | 'not' 'in' | 'is' | 'is' 'not'
|
|
n = nl[1]
|
|
if n[0] == token.NAME:
|
|
type = n[1]
|
|
if len(nl) == 3:
|
|
if type == 'not':
|
|
type = 'not in'
|
|
else:
|
|
type = 'is not'
|
|
else:
|
|
type = _cmp_types[n[0]]
|
|
|
|
lineno = nl[1][2]
|
|
results.append((type, self.com_node(nodelist[i])))
|
|
|
|
# we need a special "compare" node so that we can distinguish
|
|
# 3 < x < 5 from (3 < x) < 5
|
|
# the two have very different semantics and results (note that the
|
|
# latter form is always true)
|
|
|
|
return Compare(node, results, lineno=lineno)
|
|
|
|
def expr(self, nodelist):
|
|
# xor_expr ('|' xor_expr)*
|
|
return self.com_binary(Bitor, nodelist)
|
|
|
|
def xor_expr(self, nodelist):
|
|
# xor_expr ('^' xor_expr)*
|
|
return self.com_binary(Bitxor, nodelist)
|
|
|
|
def and_expr(self, nodelist):
|
|
# xor_expr ('&' xor_expr)*
|
|
return self.com_binary(Bitand, nodelist)
|
|
|
|
def shift_expr(self, nodelist):
|
|
# shift_expr ('<<'|'>>' shift_expr)*
|
|
node = self.com_node(nodelist[0])
|
|
for i in range(2, len(nodelist), 2):
|
|
right = self.com_node(nodelist[i])
|
|
if nodelist[i-1][0] == token.LEFTSHIFT:
|
|
node = LeftShift([node, right], lineno=nodelist[1][2])
|
|
elif nodelist[i-1][0] == token.RIGHTSHIFT:
|
|
node = RightShift([node, right], lineno=nodelist[1][2])
|
|
else:
|
|
raise ValueError, "unexpected token: %s" % nodelist[i-1][0]
|
|
return node
|
|
|
|
def arith_expr(self, nodelist):
|
|
node = self.com_node(nodelist[0])
|
|
for i in range(2, len(nodelist), 2):
|
|
right = self.com_node(nodelist[i])
|
|
if nodelist[i-1][0] == token.PLUS:
|
|
node = Add([node, right], lineno=nodelist[1][2])
|
|
elif nodelist[i-1][0] == token.MINUS:
|
|
node = Sub([node, right], lineno=nodelist[1][2])
|
|
else:
|
|
raise ValueError, "unexpected token: %s" % nodelist[i-1][0]
|
|
return node
|
|
|
|
def term(self, nodelist):
|
|
node = self.com_node(nodelist[0])
|
|
for i in range(2, len(nodelist), 2):
|
|
right = self.com_node(nodelist[i])
|
|
t = nodelist[i-1][0]
|
|
if t == token.STAR:
|
|
node = Mul([node, right])
|
|
elif t == token.SLASH:
|
|
node = Div([node, right])
|
|
elif t == token.PERCENT:
|
|
node = Mod([node, right])
|
|
elif t == token.DOUBLESLASH:
|
|
node = FloorDiv([node, right])
|
|
else:
|
|
raise ValueError, "unexpected token: %s" % t
|
|
node.lineno = nodelist[1][2]
|
|
return node
|
|
|
|
def factor(self, nodelist):
|
|
elt = nodelist[0]
|
|
t = elt[0]
|
|
node = self.lookup_node(nodelist[-1])(nodelist[-1][1:])
|
|
# need to handle (unary op)constant here...
|
|
if t == token.PLUS:
|
|
return UnaryAdd(node, lineno=elt[2])
|
|
elif t == token.MINUS:
|
|
return UnarySub(node, lineno=elt[2])
|
|
elif t == token.TILDE:
|
|
node = Invert(node, lineno=elt[2])
|
|
return node
|
|
|
|
def power(self, nodelist):
|
|
# power: atom trailer* ('**' factor)*
|
|
node = self.com_node(nodelist[0])
|
|
for i in range(1, len(nodelist)):
|
|
elt = nodelist[i]
|
|
if elt[0] == token.DOUBLESTAR:
|
|
return Power([node, self.com_node(nodelist[i+1])],
|
|
lineno=elt[2])
|
|
|
|
node = self.com_apply_trailer(node, elt)
|
|
|
|
return node
|
|
|
|
def atom(self, nodelist):
|
|
return self._atom_dispatch[nodelist[0][0]](nodelist)
|
|
n.lineno = nodelist[0][2]
|
|
return n
|
|
|
|
def atom_lpar(self, nodelist):
|
|
if nodelist[1][0] == token.RPAR:
|
|
return Tuple(())
|
|
return self.com_node(nodelist[1])
|
|
|
|
def atom_lsqb(self, nodelist):
|
|
if nodelist[1][0] == token.RSQB:
|
|
return List(())
|
|
return self.com_list_constructor(nodelist[1])
|
|
|
|
def atom_lbrace(self, nodelist):
|
|
if nodelist[1][0] == token.RBRACE:
|
|
return Dict(())
|
|
return self.com_dictmaker(nodelist[1])
|
|
|
|
def atom_backquote(self, nodelist):
|
|
return Backquote(self.com_node(nodelist[1]))
|
|
|
|
def atom_number(self, nodelist):
|
|
### need to verify this matches compile.c
|
|
k = eval(nodelist[0][1])
|
|
return Const(k, lineno=nodelist[0][2])
|
|
|
|
def decode_literal(self, lit):
|
|
if self.encoding:
|
|
# this is particularly fragile & a bit of a
|
|
# hack... changes in compile.c:parsestr and
|
|
# tokenizer.c must be reflected here.
|
|
if self.encoding not in ['utf-8', 'iso-8859-1']:
|
|
lit = unicode(lit, 'utf-8').encode(self.encoding)
|
|
return eval("# coding: %s\n%s" % (self.encoding, lit))
|
|
else:
|
|
return eval(lit)
|
|
|
|
def atom_string(self, nodelist):
|
|
k = ''
|
|
for node in nodelist:
|
|
k += self.decode_literal(node[1])
|
|
return Const(k, lineno=nodelist[0][2])
|
|
|
|
def atom_name(self, nodelist):
|
|
return Name(nodelist[0][1], lineno=nodelist[0][2])
|
|
|
|
# --------------------------------------------------------------
|
|
#
|
|
# INTERNAL PARSING UTILITIES
|
|
#
|
|
|
|
# The use of com_node() introduces a lot of extra stack frames,
|
|
# enough to cause a stack overflow compiling test.test_parser with
|
|
# the standard interpreter recursionlimit. The com_node() is a
|
|
# convenience function that hides the dispatch details, but comes
|
|
# at a very high cost. It is more efficient to dispatch directly
|
|
# in the callers. In these cases, use lookup_node() and call the
|
|
# dispatched node directly.
|
|
|
|
def lookup_node(self, node):
|
|
return self._dispatch[node[0]]
|
|
|
|
_callers = {}
|
|
|
|
def com_node(self, node):
|
|
# Note: compile.c has handling in com_node for del_stmt, pass_stmt,
|
|
# break_stmt, stmt, small_stmt, flow_stmt, simple_stmt,
|
|
# and compound_stmt.
|
|
# We'll just dispatch them.
|
|
return self._dispatch[node[0]](node[1:])
|
|
|
|
def com_NEWLINE(self, *args):
|
|
# A ';' at the end of a line can make a NEWLINE token appear
|
|
# here, Render it harmless. (genc discards ('discard',
|
|
# ('const', xxxx)) Nodes)
|
|
return Discard(Const(None))
|
|
|
|
def com_arglist(self, nodelist):
|
|
# varargslist:
|
|
# (fpdef ['=' test] ',')* ('*' NAME [',' '**' NAME] | '**' NAME)
|
|
# | fpdef ['=' test] (',' fpdef ['=' test])* [',']
|
|
# fpdef: NAME | '(' fplist ')'
|
|
# fplist: fpdef (',' fpdef)* [',']
|
|
names = []
|
|
defaults = []
|
|
flags = 0
|
|
|
|
i = 0
|
|
while i < len(nodelist):
|
|
node = nodelist[i]
|
|
if node[0] == token.STAR or node[0] == token.DOUBLESTAR:
|
|
if node[0] == token.STAR:
|
|
node = nodelist[i+1]
|
|
if node[0] == token.NAME:
|
|
names.append(node[1])
|
|
flags = flags | CO_VARARGS
|
|
i = i + 3
|
|
|
|
if i < len(nodelist):
|
|
# should be DOUBLESTAR
|
|
t = nodelist[i][0]
|
|
if t == token.DOUBLESTAR:
|
|
node = nodelist[i+1]
|
|
else:
|
|
raise ValueError, "unexpected token: %s" % t
|
|
names.append(node[1])
|
|
flags = flags | CO_VARKEYWORDS
|
|
|
|
break
|
|
|
|
# fpdef: NAME | '(' fplist ')'
|
|
names.append(self.com_fpdef(node))
|
|
|
|
i = i + 1
|
|
if i >= len(nodelist):
|
|
break
|
|
|
|
if nodelist[i][0] == token.EQUAL:
|
|
defaults.append(self.com_node(nodelist[i + 1]))
|
|
i = i + 2
|
|
elif len(defaults):
|
|
# XXX This should be a syntax error.
|
|
# Treat "(a=1, b)" as "(a=1, b=None)"
|
|
defaults.append(Const(None))
|
|
|
|
i = i + 1
|
|
|
|
return names, defaults, flags
|
|
|
|
def com_fpdef(self, node):
|
|
# fpdef: NAME | '(' fplist ')'
|
|
if node[1][0] == token.LPAR:
|
|
return self.com_fplist(node[2])
|
|
return node[1][1]
|
|
|
|
def com_fplist(self, node):
|
|
# fplist: fpdef (',' fpdef)* [',']
|
|
if len(node) == 2:
|
|
return self.com_fpdef(node[1])
|
|
list = []
|
|
for i in range(1, len(node), 2):
|
|
list.append(self.com_fpdef(node[i]))
|
|
return tuple(list)
|
|
|
|
def com_dotted_name(self, node):
|
|
# String together the dotted names and return the string
|
|
name = ""
|
|
for n in node:
|
|
if type(n) == type(()) and n[0] == 1:
|
|
name = name + n[1] + '.'
|
|
return name[:-1]
|
|
|
|
def com_dotted_as_name(self, node):
|
|
assert node[0] == symbol.dotted_as_name
|
|
node = node[1:]
|
|
dot = self.com_dotted_name(node[0][1:])
|
|
if len(node) == 1:
|
|
return dot, None
|
|
assert node[1][1] == 'as'
|
|
assert node[2][0] == token.NAME
|
|
return dot, node[2][1]
|
|
|
|
def com_dotted_as_names(self, node):
|
|
assert node[0] == symbol.dotted_as_names
|
|
node = node[1:]
|
|
names = [self.com_dotted_as_name(node[0])]
|
|
for i in range(2, len(node), 2):
|
|
names.append(self.com_dotted_as_name(node[i]))
|
|
return names
|
|
|
|
def com_import_as_name(self, node):
|
|
assert node[0] == symbol.import_as_name
|
|
node = node[1:]
|
|
assert node[0][0] == token.NAME
|
|
if len(node) == 1:
|
|
return node[0][1], None
|
|
assert node[1][1] == 'as', node
|
|
assert node[2][0] == token.NAME
|
|
return node[0][1], node[2][1]
|
|
|
|
def com_import_as_names(self, node):
|
|
assert node[0] == symbol.import_as_names
|
|
node = node[1:]
|
|
names = [self.com_import_as_name(node[0])]
|
|
for i in range(2, len(node), 2):
|
|
names.append(self.com_import_as_name(node[i]))
|
|
return names
|
|
|
|
def com_bases(self, node):
|
|
bases = []
|
|
for i in range(1, len(node), 2):
|
|
bases.append(self.com_node(node[i]))
|
|
return bases
|
|
|
|
def com_try_finally(self, nodelist):
|
|
# try_fin_stmt: "try" ":" suite "finally" ":" suite
|
|
return TryFinally(self.com_node(nodelist[2]),
|
|
self.com_node(nodelist[5]),
|
|
lineno=nodelist[0][2])
|
|
|
|
def com_try_except(self, nodelist):
|
|
# try_except: 'try' ':' suite (except_clause ':' suite)* ['else' suite]
|
|
#tryexcept: [TryNode, [except_clauses], elseNode)]
|
|
stmt = self.com_node(nodelist[2])
|
|
clauses = []
|
|
elseNode = None
|
|
for i in range(3, len(nodelist), 3):
|
|
node = nodelist[i]
|
|
if node[0] == symbol.except_clause:
|
|
# except_clause: 'except' [expr [',' expr]] */
|
|
if len(node) > 2:
|
|
expr1 = self.com_node(node[2])
|
|
if len(node) > 4:
|
|
expr2 = self.com_assign(node[4], OP_ASSIGN)
|
|
else:
|
|
expr2 = None
|
|
else:
|
|
expr1 = expr2 = None
|
|
clauses.append((expr1, expr2, self.com_node(nodelist[i+2])))
|
|
|
|
if node[0] == token.NAME:
|
|
elseNode = self.com_node(nodelist[i+2])
|
|
return TryExcept(self.com_node(nodelist[2]), clauses, elseNode,
|
|
lineno=nodelist[0][2])
|
|
|
|
def com_augassign_op(self, node):
|
|
assert node[0] == symbol.augassign
|
|
return node[1]
|
|
|
|
def com_augassign(self, node):
|
|
"""Return node suitable for lvalue of augmented assignment
|
|
|
|
Names, slices, and attributes are the only allowable nodes.
|
|
"""
|
|
l = self.com_node(node)
|
|
if l.__class__ in (Name, Slice, Subscript, Getattr):
|
|
return l
|
|
raise SyntaxError, "can't assign to %s" % l.__class__.__name__
|
|
|
|
def com_assign(self, node, assigning):
|
|
# return a node suitable for use as an "lvalue"
|
|
# loop to avoid trivial recursion
|
|
while 1:
|
|
t = node[0]
|
|
if t == symbol.exprlist or t == symbol.testlist or t == symbol.testlist_gexp:
|
|
if len(node) > 2:
|
|
return self.com_assign_tuple(node, assigning)
|
|
node = node[1]
|
|
elif t in _assign_types:
|
|
if len(node) > 2:
|
|
raise SyntaxError, "can't assign to operator"
|
|
node = node[1]
|
|
elif t == symbol.power:
|
|
if node[1][0] != symbol.atom:
|
|
raise SyntaxError, "can't assign to operator"
|
|
if len(node) > 2:
|
|
primary = self.com_node(node[1])
|
|
for i in range(2, len(node)-1):
|
|
ch = node[i]
|
|
if ch[0] == token.DOUBLESTAR:
|
|
raise SyntaxError, "can't assign to operator"
|
|
primary = self.com_apply_trailer(primary, ch)
|
|
return self.com_assign_trailer(primary, node[-1],
|
|
assigning)
|
|
node = node[1]
|
|
elif t == symbol.atom:
|
|
t = node[1][0]
|
|
if t == token.LPAR:
|
|
node = node[2]
|
|
if node[0] == token.RPAR:
|
|
raise SyntaxError, "can't assign to ()"
|
|
elif t == token.LSQB:
|
|
node = node[2]
|
|
if node[0] == token.RSQB:
|
|
raise SyntaxError, "can't assign to []"
|
|
return self.com_assign_list(node, assigning)
|
|
elif t == token.NAME:
|
|
return self.com_assign_name(node[1], assigning)
|
|
else:
|
|
raise SyntaxError, "can't assign to literal"
|
|
else:
|
|
raise SyntaxError, "bad assignment"
|
|
|
|
def com_assign_tuple(self, node, assigning):
|
|
assigns = []
|
|
for i in range(1, len(node), 2):
|
|
assigns.append(self.com_assign(node[i], assigning))
|
|
return AssTuple(assigns, lineno=extractLineNo(node))
|
|
|
|
def com_assign_list(self, node, assigning):
|
|
assigns = []
|
|
for i in range(1, len(node), 2):
|
|
if i + 1 < len(node):
|
|
if node[i + 1][0] == symbol.list_for:
|
|
raise SyntaxError, "can't assign to list comprehension"
|
|
assert node[i + 1][0] == token.COMMA, node[i + 1]
|
|
assigns.append(self.com_assign(node[i], assigning))
|
|
return AssList(assigns, lineno=extractLineNo(node))
|
|
|
|
def com_assign_name(self, node, assigning):
|
|
return AssName(node[1], assigning, lineno=node[2])
|
|
|
|
def com_assign_trailer(self, primary, node, assigning):
|
|
t = node[1][0]
|
|
if t == token.DOT:
|
|
return self.com_assign_attr(primary, node[2], assigning)
|
|
if t == token.LSQB:
|
|
return self.com_subscriptlist(primary, node[2], assigning)
|
|
if t == token.LPAR:
|
|
raise SyntaxError, "can't assign to function call"
|
|
raise SyntaxError, "unknown trailer type: %s" % t
|
|
|
|
def com_assign_attr(self, primary, node, assigning):
|
|
return AssAttr(primary, node[1], assigning, lineno=node[-1])
|
|
|
|
def com_binary(self, constructor, nodelist):
|
|
"Compile 'NODE (OP NODE)*' into (type, [ node1, ..., nodeN ])."
|
|
l = len(nodelist)
|
|
if l == 1:
|
|
n = nodelist[0]
|
|
return self.lookup_node(n)(n[1:])
|
|
items = []
|
|
for i in range(0, l, 2):
|
|
n = nodelist[i]
|
|
items.append(self.lookup_node(n)(n[1:]))
|
|
return constructor(items, lineno=extractLineNo(nodelist))
|
|
|
|
def com_stmt(self, node):
|
|
result = self.lookup_node(node)(node[1:])
|
|
assert result is not None
|
|
if isinstance(result, Stmt):
|
|
return result
|
|
return Stmt([result])
|
|
|
|
def com_append_stmt(self, stmts, node):
|
|
result = self.lookup_node(node)(node[1:])
|
|
assert result is not None
|
|
if isinstance(result, Stmt):
|
|
stmts.extend(result.nodes)
|
|
else:
|
|
stmts.append(result)
|
|
|
|
if hasattr(symbol, 'list_for'):
|
|
def com_list_constructor(self, nodelist):
|
|
# listmaker: test ( list_for | (',' test)* [','] )
|
|
values = []
|
|
for i in range(1, len(nodelist)):
|
|
if nodelist[i][0] == symbol.list_for:
|
|
assert len(nodelist[i:]) == 1
|
|
return self.com_list_comprehension(values[0],
|
|
nodelist[i])
|
|
elif nodelist[i][0] == token.COMMA:
|
|
continue
|
|
values.append(self.com_node(nodelist[i]))
|
|
return List(values, lineno=values[0].lineno)
|
|
|
|
def com_list_comprehension(self, expr, node):
|
|
# list_iter: list_for | list_if
|
|
# list_for: 'for' exprlist 'in' testlist [list_iter]
|
|
# list_if: 'if' test [list_iter]
|
|
|
|
# XXX should raise SyntaxError for assignment
|
|
|
|
lineno = node[1][2]
|
|
fors = []
|
|
while node:
|
|
t = node[1][1]
|
|
if t == 'for':
|
|
assignNode = self.com_assign(node[2], OP_ASSIGN)
|
|
listNode = self.com_node(node[4])
|
|
newfor = ListCompFor(assignNode, listNode, [])
|
|
newfor.lineno = node[1][2]
|
|
fors.append(newfor)
|
|
if len(node) == 5:
|
|
node = None
|
|
else:
|
|
node = self.com_list_iter(node[5])
|
|
elif t == 'if':
|
|
test = self.com_node(node[2])
|
|
newif = ListCompIf(test, lineno=node[1][2])
|
|
newfor.ifs.append(newif)
|
|
if len(node) == 3:
|
|
node = None
|
|
else:
|
|
node = self.com_list_iter(node[3])
|
|
else:
|
|
raise SyntaxError, \
|
|
("unexpected list comprehension element: %s %d"
|
|
% (node, lineno))
|
|
return ListComp(expr, fors, lineno=lineno)
|
|
|
|
def com_list_iter(self, node):
|
|
assert node[0] == symbol.list_iter
|
|
return node[1]
|
|
else:
|
|
def com_list_constructor(self, nodelist):
|
|
values = []
|
|
for i in range(1, len(nodelist), 2):
|
|
values.append(self.com_node(nodelist[i]))
|
|
return List(values)
|
|
|
|
if hasattr(symbol, 'gen_for'):
|
|
def com_generator_expression(self, expr, node):
|
|
# gen_iter: gen_for | gen_if
|
|
# gen_for: 'for' exprlist 'in' test [gen_iter]
|
|
# gen_if: 'if' test [gen_iter]
|
|
|
|
lineno = node[1][2]
|
|
fors = []
|
|
while node:
|
|
t = node[1][1]
|
|
if t == 'for':
|
|
assignNode = self.com_assign(node[2], OP_ASSIGN)
|
|
genNode = self.com_node(node[4])
|
|
newfor = GenExprFor(assignNode, genNode, [],
|
|
lineno=node[1][2])
|
|
fors.append(newfor)
|
|
if (len(node)) == 5:
|
|
node = None
|
|
else:
|
|
node = self.com_gen_iter(node[5])
|
|
elif t == 'if':
|
|
test = self.com_node(node[2])
|
|
newif = GenExprIf(test, lineno=node[1][2])
|
|
newfor.ifs.append(newif)
|
|
if len(node) == 3:
|
|
node = None
|
|
else:
|
|
node = self.com_gen_iter(node[3])
|
|
else:
|
|
raise SyntaxError, \
|
|
("unexpected generator expression element: %s %d"
|
|
% (node, lineno))
|
|
fors[0].is_outmost = True
|
|
return GenExpr(GenExprInner(expr, fors), lineno=lineno)
|
|
|
|
def com_gen_iter(self, node):
|
|
assert node[0] == symbol.gen_iter
|
|
return node[1]
|
|
|
|
def com_dictmaker(self, nodelist):
|
|
# dictmaker: test ':' test (',' test ':' value)* [',']
|
|
items = []
|
|
for i in range(1, len(nodelist), 4):
|
|
items.append((self.com_node(nodelist[i]),
|
|
self.com_node(nodelist[i+2])))
|
|
return Dict(items)
|
|
|
|
def com_apply_trailer(self, primaryNode, nodelist):
|
|
t = nodelist[1][0]
|
|
if t == token.LPAR:
|
|
return self.com_call_function(primaryNode, nodelist[2])
|
|
if t == token.DOT:
|
|
return self.com_select_member(primaryNode, nodelist[2])
|
|
if t == token.LSQB:
|
|
return self.com_subscriptlist(primaryNode, nodelist[2], OP_APPLY)
|
|
|
|
raise SyntaxError, 'unknown node type: %s' % t
|
|
|
|
def com_select_member(self, primaryNode, nodelist):
|
|
if nodelist[0] != token.NAME:
|
|
raise SyntaxError, "member must be a name"
|
|
return Getattr(primaryNode, nodelist[1], lineno=nodelist[2])
|
|
|
|
def com_call_function(self, primaryNode, nodelist):
|
|
if nodelist[0] == token.RPAR:
|
|
return CallFunc(primaryNode, [], lineno=extractLineNo(nodelist))
|
|
args = []
|
|
kw = 0
|
|
len_nodelist = len(nodelist)
|
|
for i in range(1, len_nodelist, 2):
|
|
node = nodelist[i]
|
|
if node[0] == token.STAR or node[0] == token.DOUBLESTAR:
|
|
break
|
|
kw, result = self.com_argument(node, kw)
|
|
|
|
if len_nodelist != 2 and isinstance(result, GenExpr) \
|
|
and len(node) == 3 and node[2][0] == symbol.gen_for:
|
|
# allow f(x for x in y), but reject f(x for x in y, 1)
|
|
# should use f((x for x in y), 1) instead of f(x for x in y, 1)
|
|
raise SyntaxError, 'generator expression needs parenthesis'
|
|
|
|
args.append(result)
|
|
else:
|
|
# No broken by star arg, so skip the last one we processed.
|
|
i = i + 1
|
|
if i < len_nodelist and nodelist[i][0] == token.COMMA:
|
|
# need to accept an application that looks like "f(a, b,)"
|
|
i = i + 1
|
|
star_node = dstar_node = None
|
|
while i < len_nodelist:
|
|
tok = nodelist[i]
|
|
ch = nodelist[i+1]
|
|
i = i + 3
|
|
if tok[0]==token.STAR:
|
|
if star_node is not None:
|
|
raise SyntaxError, 'already have the varargs indentifier'
|
|
star_node = self.com_node(ch)
|
|
elif tok[0]==token.DOUBLESTAR:
|
|
if dstar_node is not None:
|
|
raise SyntaxError, 'already have the kwargs indentifier'
|
|
dstar_node = self.com_node(ch)
|
|
else:
|
|
raise SyntaxError, 'unknown node type: %s' % tok
|
|
return CallFunc(primaryNode, args, star_node, dstar_node,
|
|
lineno=extractLineNo(nodelist))
|
|
|
|
def com_argument(self, nodelist, kw):
|
|
if len(nodelist) == 3 and nodelist[2][0] == symbol.gen_for:
|
|
test = self.com_node(nodelist[1])
|
|
return 0, self.com_generator_expression(test, nodelist[2])
|
|
if len(nodelist) == 2:
|
|
if kw:
|
|
raise SyntaxError, "non-keyword arg after keyword arg"
|
|
return 0, self.com_node(nodelist[1])
|
|
result = self.com_node(nodelist[3])
|
|
n = nodelist[1]
|
|
while len(n) == 2 and n[0] != token.NAME:
|
|
n = n[1]
|
|
if n[0] != token.NAME:
|
|
raise SyntaxError, "keyword can't be an expression (%s)"%n[0]
|
|
node = Keyword(n[1], result, lineno=n[2])
|
|
return 1, node
|
|
|
|
def com_subscriptlist(self, primary, nodelist, assigning):
|
|
# slicing: simple_slicing | extended_slicing
|
|
# simple_slicing: primary "[" short_slice "]"
|
|
# extended_slicing: primary "[" slice_list "]"
|
|
# slice_list: slice_item ("," slice_item)* [","]
|
|
|
|
# backwards compat slice for '[i:j]'
|
|
if len(nodelist) == 2:
|
|
sub = nodelist[1]
|
|
if (sub[1][0] == token.COLON or \
|
|
(len(sub) > 2 and sub[2][0] == token.COLON)) and \
|
|
sub[-1][0] != symbol.sliceop:
|
|
return self.com_slice(primary, sub, assigning)
|
|
|
|
subscripts = []
|
|
for i in range(1, len(nodelist), 2):
|
|
subscripts.append(self.com_subscript(nodelist[i]))
|
|
return Subscript(primary, assigning, subscripts,
|
|
lineno=extractLineNo(nodelist))
|
|
|
|
def com_subscript(self, node):
|
|
# slice_item: expression | proper_slice | ellipsis
|
|
ch = node[1]
|
|
t = ch[0]
|
|
if t == token.DOT and node[2][0] == token.DOT:
|
|
return Ellipsis()
|
|
if t == token.COLON or len(node) > 2:
|
|
return self.com_sliceobj(node)
|
|
return self.com_node(ch)
|
|
|
|
def com_sliceobj(self, node):
|
|
# proper_slice: short_slice | long_slice
|
|
# short_slice: [lower_bound] ":" [upper_bound]
|
|
# long_slice: short_slice ":" [stride]
|
|
# lower_bound: expression
|
|
# upper_bound: expression
|
|
# stride: expression
|
|
#
|
|
# Note: a stride may be further slicing...
|
|
|
|
items = []
|
|
|
|
if node[1][0] == token.COLON:
|
|
items.append(Const(None))
|
|
i = 2
|
|
else:
|
|
items.append(self.com_node(node[1]))
|
|
# i == 2 is a COLON
|
|
i = 3
|
|
|
|
if i < len(node) and node[i][0] == symbol.test:
|
|
items.append(self.com_node(node[i]))
|
|
i = i + 1
|
|
else:
|
|
items.append(Const(None))
|
|
|
|
# a short_slice has been built. look for long_slice now by looking
|
|
# for strides...
|
|
for j in range(i, len(node)):
|
|
ch = node[j]
|
|
if len(ch) == 2:
|
|
items.append(Const(None))
|
|
else:
|
|
items.append(self.com_node(ch[2]))
|
|
return Sliceobj(items, lineno=extractLineNo(node))
|
|
|
|
def com_slice(self, primary, node, assigning):
|
|
# short_slice: [lower_bound] ":" [upper_bound]
|
|
lower = upper = None
|
|
if len(node) == 3:
|
|
if node[1][0] == token.COLON:
|
|
upper = self.com_node(node[2])
|
|
else:
|
|
lower = self.com_node(node[1])
|
|
elif len(node) == 4:
|
|
lower = self.com_node(node[1])
|
|
upper = self.com_node(node[3])
|
|
return Slice(primary, assigning, lower, upper,
|
|
lineno=extractLineNo(node))
|
|
|
|
def get_docstring(self, node, n=None):
|
|
if n is None:
|
|
n = node[0]
|
|
node = node[1:]
|
|
if n == symbol.suite:
|
|
if len(node) == 1:
|
|
return self.get_docstring(node[0])
|
|
for sub in node:
|
|
if sub[0] == symbol.stmt:
|
|
return self.get_docstring(sub)
|
|
return None
|
|
if n == symbol.file_input:
|
|
for sub in node:
|
|
if sub[0] == symbol.stmt:
|
|
return self.get_docstring(sub)
|
|
return None
|
|
if n == symbol.atom:
|
|
if node[0][0] == token.STRING:
|
|
s = ''
|
|
for t in node:
|
|
s = s + eval(t[1])
|
|
return s
|
|
return None
|
|
if n == symbol.stmt or n == symbol.simple_stmt \
|
|
or n == symbol.small_stmt:
|
|
return self.get_docstring(node[0])
|
|
if n in _doc_nodes and len(node) == 1:
|
|
return self.get_docstring(node[0])
|
|
return None
|
|
|
|
|
|
_doc_nodes = [
|
|
symbol.expr_stmt,
|
|
symbol.testlist,
|
|
symbol.testlist_safe,
|
|
symbol.test,
|
|
symbol.and_test,
|
|
symbol.not_test,
|
|
symbol.comparison,
|
|
symbol.expr,
|
|
symbol.xor_expr,
|
|
symbol.and_expr,
|
|
symbol.shift_expr,
|
|
symbol.arith_expr,
|
|
symbol.term,
|
|
symbol.factor,
|
|
symbol.power,
|
|
]
|
|
|
|
# comp_op: '<' | '>' | '=' | '>=' | '<=' | '<>' | '!=' | '=='
|
|
# | 'in' | 'not' 'in' | 'is' | 'is' 'not'
|
|
_cmp_types = {
|
|
token.LESS : '<',
|
|
token.GREATER : '>',
|
|
token.EQEQUAL : '==',
|
|
token.EQUAL : '==',
|
|
token.LESSEQUAL : '<=',
|
|
token.GREATEREQUAL : '>=',
|
|
token.NOTEQUAL : '!=',
|
|
}
|
|
|
|
_legal_node_types = [
|
|
symbol.funcdef,
|
|
symbol.classdef,
|
|
symbol.stmt,
|
|
symbol.small_stmt,
|
|
symbol.flow_stmt,
|
|
symbol.simple_stmt,
|
|
symbol.compound_stmt,
|
|
symbol.expr_stmt,
|
|
symbol.print_stmt,
|
|
symbol.del_stmt,
|
|
symbol.pass_stmt,
|
|
symbol.break_stmt,
|
|
symbol.continue_stmt,
|
|
symbol.return_stmt,
|
|
symbol.raise_stmt,
|
|
symbol.import_stmt,
|
|
symbol.global_stmt,
|
|
symbol.exec_stmt,
|
|
symbol.assert_stmt,
|
|
symbol.if_stmt,
|
|
symbol.while_stmt,
|
|
symbol.for_stmt,
|
|
symbol.try_stmt,
|
|
symbol.suite,
|
|
symbol.testlist,
|
|
symbol.testlist_safe,
|
|
symbol.test,
|
|
symbol.and_test,
|
|
symbol.not_test,
|
|
symbol.comparison,
|
|
symbol.exprlist,
|
|
symbol.expr,
|
|
symbol.xor_expr,
|
|
symbol.and_expr,
|
|
symbol.shift_expr,
|
|
symbol.arith_expr,
|
|
symbol.term,
|
|
symbol.factor,
|
|
symbol.power,
|
|
symbol.atom,
|
|
]
|
|
|
|
if hasattr(symbol, 'yield_stmt'):
|
|
_legal_node_types.append(symbol.yield_stmt)
|
|
if hasattr(symbol, 'yield_expr'):
|
|
_legal_node_types.append(symbol.yield_expr)
|
|
|
|
_assign_types = [
|
|
symbol.test,
|
|
symbol.and_test,
|
|
symbol.not_test,
|
|
symbol.comparison,
|
|
symbol.expr,
|
|
symbol.xor_expr,
|
|
symbol.and_expr,
|
|
symbol.shift_expr,
|
|
symbol.arith_expr,
|
|
symbol.term,
|
|
symbol.factor,
|
|
]
|
|
|
|
import types
|
|
_names = {}
|
|
for k, v in symbol.sym_name.items():
|
|
_names[k] = v
|
|
for k, v in token.tok_name.items():
|
|
_names[k] = v
|
|
|
|
def debug_tree(tree):
|
|
l = []
|
|
for elt in tree:
|
|
if type(elt) == types.IntType:
|
|
l.append(_names.get(elt, elt))
|
|
elif type(elt) == types.StringType:
|
|
l.append(elt)
|
|
else:
|
|
l.append(debug_tree(elt))
|
|
return l
|