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303 lines
14 KiB
Python
303 lines
14 KiB
Python
# Copyright (c) 2017-2019 Rocky Bernstein
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#
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# This program is free software: you can redistribute it and/or modify
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# it under the terms of the GNU General Public License as published by
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# the Free Software Foundation, either version 3 of the License, or
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# (at your option) any later version.
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#
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# This program is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU General Public License for more details.
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#
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# You should have received a copy of the GNU General Public License
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# along with this program. If not, see <http://www.gnu.org/licenses/>.
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"""
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spark grammar differences over Python 3.7 for Python 3.8
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"""
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from __future__ import print_function
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from uncompyle6.parser import PythonParserSingle
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from spark_parser import DEFAULT_DEBUG as PARSER_DEFAULT_DEBUG
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from uncompyle6.parsers.parse37 import Python37Parser
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class Python38Parser(Python37Parser):
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def p_38walrus(self, args):
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"""
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# named_expr is also known as the "walrus op" :=
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expr ::= named_expr
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named_expr ::= expr DUP_TOP store
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"""
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def p_38misc(self, args):
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"""
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stmt ::= async_for_stmt38
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stmt ::= async_forelse_stmt38
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stmt ::= for38
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stmt ::= forelsestmt38
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stmt ::= forelselaststmt38
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stmt ::= forelselaststmtl38
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stmt ::= tryfinally38stmt
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stmt ::= tryfinally38rstmt
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stmt ::= tryfinally38astmt
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stmt ::= try_elsestmtl38
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stmt ::= try_except_ret38
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stmt ::= try_except38
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stmt ::= whilestmt38
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stmt ::= whileTruestmt38
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stmt ::= call
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break ::= POP_BLOCK BREAK_LOOP
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break ::= POP_BLOCK POP_TOP BREAK_LOOP
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break ::= POP_TOP BREAK_LOOP
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break ::= POP_EXCEPT BREAK_LOOP
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# FIXME: this should be restricted to being inside a try block
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stmt ::= except_ret38
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# FIXME: this should be added only when seeing GET_AITER or YIELD_FROM
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async_for_stmt38 ::= expr
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GET_AITER
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SETUP_FINALLY
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GET_ANEXT
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LOAD_CONST
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YIELD_FROM
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POP_BLOCK
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store for_block
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COME_FROM_FINALLY
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END_ASYNC_FOR
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# FIXME: come froms after the else_suite or END_ASYNC_FOR distinguish which of
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# for / forelse is used. Add come froms and check of add up control-flow detection phase.
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async_forelse_stmt38 ::= expr
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GET_AITER
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SETUP_FINALLY
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GET_ANEXT
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LOAD_CONST
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YIELD_FROM
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POP_BLOCK
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store for_block
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COME_FROM_FINALLY
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END_ASYNC_FOR
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else_suite
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return ::= ret_expr ROT_TWO POP_TOP RETURN_VALUE
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# 3.8 can push a looping JUMP_BACK into into a JUMP_ from a statement that jumps to it
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lastl_stmt ::= ifpoplaststmtl
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ifpoplaststmtl ::= testexpr POP_TOP c_stmts_opt JUMP_BACK
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ifelsestmtl ::= testexpr c_stmts_opt jb_cfs else_suitel JUMP_BACK come_froms
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for38 ::= expr get_iter store for_block JUMP_BACK
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for38 ::= expr get_for_iter store for_block JUMP_BACK
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for38 ::= expr get_for_iter store for_block JUMP_BACK POP_BLOCK
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for38 ::= expr get_for_iter store for_block
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forelsestmt38 ::= expr get_for_iter store for_block POP_BLOCK else_suite
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forelselaststmt38 ::= expr get_for_iter store for_block POP_BLOCK else_suitec
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forelselaststmtl38 ::= expr get_for_iter store for_block POP_BLOCK else_suitel
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whilestmt38 ::= _come_froms testexpr l_stmts_opt COME_FROM JUMP_BACK POP_BLOCK
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whilestmt38 ::= _come_froms testexpr l_stmts_opt JUMP_BACK POP_BLOCK
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whilestmt38 ::= _come_froms testexpr l_stmts_opt JUMP_BACK come_froms
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whilestmt38 ::= _come_froms testexpr returns POP_BLOCK
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whilestmt38 ::= _come_froms testexpr l_stmts JUMP_BACK
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whilestmt38 ::= _come_froms testexpr l_stmts come_froms
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# while1elsestmt ::= l_stmts JUMP_BACK
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whileTruestmt ::= _come_froms l_stmts JUMP_BACK POP_BLOCK
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while1stmt ::= _come_froms l_stmts COME_FROM_LOOP
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while1stmt ::= _come_froms l_stmts COME_FROM JUMP_BACK COME_FROM_LOOP
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whileTruestmt38 ::= _come_froms l_stmts JUMP_BACK
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whileTruestmt38 ::= _come_froms l_stmts JUMP_BACK COME_FROM_EXCEPT_CLAUSE
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for_block ::= _come_froms l_stmts_opt _come_from_loops JUMP_BACK
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except_cond1 ::= DUP_TOP expr COMPARE_OP jmp_false
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POP_TOP POP_TOP POP_TOP
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POP_EXCEPT
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try_elsestmtl38 ::= SETUP_FINALLY suite_stmts_opt POP_BLOCK
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except_handler38 COME_FROM
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else_suitel opt_come_from_except
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try_except ::= SETUP_FINALLY suite_stmts_opt POP_BLOCK
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except_handler38
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try_except38 ::= SETUP_FINALLY POP_BLOCK POP_TOP suite_stmts_opt
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except_handler38a
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try_except_ret38 ::= SETUP_FINALLY expr POP_BLOCK
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RETURN_VALUE except_ret38a
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# Note: there is a suite_stmts_opt which seems
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# to be bookkeeping which is not expressed in source code
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except_ret38 ::= SETUP_FINALLY expr ROT_FOUR POP_BLOCK POP_EXCEPT
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CALL_FINALLY RETURN_VALUE COME_FROM
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COME_FROM_FINALLY
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suite_stmts_opt END_FINALLY
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except_ret38a ::= COME_FROM_FINALLY POP_TOP POP_TOP POP_TOP
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expr ROT_FOUR
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POP_EXCEPT RETURN_VALUE END_FINALLY
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except_handler38 ::= _jump COME_FROM_FINALLY
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except_stmts END_FINALLY opt_come_from_except
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except_handler38a ::= COME_FROM_FINALLY POP_TOP POP_TOP POP_TOP
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POP_EXCEPT POP_TOP stmts END_FINALLY
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tryfinallystmt ::= SETUP_FINALLY suite_stmts_opt POP_BLOCK
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BEGIN_FINALLY COME_FROM_FINALLY suite_stmts_opt
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END_FINALLY
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tryfinally38rstmt ::= SETUP_FINALLY POP_BLOCK CALL_FINALLY
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returns
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COME_FROM_FINALLY END_FINALLY suite_stmts
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tryfinally38rstmt ::= SETUP_FINALLY POP_BLOCK CALL_FINALLY
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returns
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COME_FROM_FINALLY POP_FINALLY returns
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END_FINALLY
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tryfinally38stmt ::= SETUP_FINALLY suite_stmts_opt POP_BLOCK
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BEGIN_FINALLY COME_FROM_FINALLY
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POP_FINALLY suite_stmts_opt END_FINALLY
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tryfinally38stmt ::= SETUP_FINALLY suite_stmts_opt POP_BLOCK
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BEGIN_FINALLY COME_FROM_FINALLY
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POP_FINALLY suite_stmts_opt END_FINALLY
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tryfinally38astmt ::= LOAD_CONST SETUP_FINALLY suite_stmts_opt POP_BLOCK
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BEGIN_FINALLY COME_FROM_FINALLY
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POP_FINALLY POP_TOP suite_stmts_opt END_FINALLY POP_TOP
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"""
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def __init__(self, debug_parser=PARSER_DEFAULT_DEBUG):
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super(Python38Parser, self).__init__(debug_parser)
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self.customized = {}
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def remove_rules_38(self):
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self.remove_rules(
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"""
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stmt ::= async_for_stmt37
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stmt ::= for
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stmt ::= forelsestmt
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stmt ::= try_except36
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stmt ::= async_forelse_stmt
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async_for_stmt ::= setup_loop expr
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GET_AITER
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SETUP_EXCEPT GET_ANEXT LOAD_CONST
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YIELD_FROM
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store
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POP_BLOCK JUMP_FORWARD COME_FROM_EXCEPT DUP_TOP
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LOAD_GLOBAL COMPARE_OP POP_JUMP_IF_TRUE
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END_FINALLY COME_FROM
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for_block
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COME_FROM
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POP_TOP POP_TOP POP_TOP POP_EXCEPT POP_TOP POP_BLOCK
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COME_FROM_LOOP
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async_for_stmt37 ::= setup_loop expr
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GET_AITER
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SETUP_EXCEPT GET_ANEXT
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LOAD_CONST YIELD_FROM
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store
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POP_BLOCK JUMP_BACK COME_FROM_EXCEPT DUP_TOP
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LOAD_GLOBAL COMPARE_OP POP_JUMP_IF_TRUE
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END_FINALLY for_block COME_FROM
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POP_TOP POP_TOP POP_TOP POP_EXCEPT
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POP_TOP POP_BLOCK
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COME_FROM_LOOP
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async_forelse_stmt ::= setup_loop expr
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GET_AITER
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SETUP_EXCEPT GET_ANEXT LOAD_CONST
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YIELD_FROM
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store
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POP_BLOCK JUMP_FORWARD COME_FROM_EXCEPT DUP_TOP
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LOAD_GLOBAL COMPARE_OP POP_JUMP_IF_TRUE
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END_FINALLY COME_FROM
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for_block
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COME_FROM
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POP_TOP POP_TOP POP_TOP POP_EXCEPT POP_TOP POP_BLOCK
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else_suite COME_FROM_LOOP
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for ::= setup_loop expr get_for_iter store for_block POP_BLOCK
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for ::= setup_loop expr get_for_iter store for_block POP_BLOCK NOP
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for_block ::= l_stmts_opt COME_FROM_LOOP JUMP_BACK
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forelsestmt ::= setup_loop expr get_for_iter store for_block POP_BLOCK else_suite
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forelselaststmt ::= setup_loop expr get_for_iter store for_block POP_BLOCK else_suitec
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forelselaststmtl ::= setup_loop expr get_for_iter store for_block POP_BLOCK else_suitel
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tryelsestmtl3 ::= SETUP_EXCEPT suite_stmts_opt POP_BLOCK
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except_handler COME_FROM else_suitel
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opt_come_from_except
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try_except ::= SETUP_EXCEPT suite_stmts_opt POP_BLOCK
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except_handler opt_come_from_except
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tryfinallystmt ::= SETUP_FINALLY suite_stmts_opt POP_BLOCK
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LOAD_CONST COME_FROM_FINALLY suite_stmts_opt
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END_FINALLY
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tryfinally36 ::= SETUP_FINALLY returns
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COME_FROM_FINALLY suite_stmts_opt END_FINALLY
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tryfinally_return_stmt ::= SETUP_FINALLY suite_stmts_opt POP_BLOCK
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LOAD_CONST COME_FROM_FINALLY
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"""
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)
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def customize_grammar_rules(self, tokens, customize):
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super(Python37Parser, self).customize_grammar_rules(tokens, customize)
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self.remove_rules_38()
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self.check_reduce["whileTruestmt38"] = "tokens"
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self.check_reduce["whilestmt38"] = "tokens"
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def reduce_is_invalid(self, rule, ast, tokens, first, last):
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invalid = super(Python38Parser,
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self).reduce_is_invalid(rule, ast,
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tokens, first, last)
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self.remove_rules_38()
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if invalid:
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return invalid
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lhs = rule[0]
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if lhs in ("whileTruestmt38", "whilestmt38"):
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jb_index = last - 1
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while jb_index > 0 and tokens[jb_index].kind.startswith("COME_FROM"):
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jb_index -= 1
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t = tokens[jb_index]
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if t.kind != "JUMP_BACK":
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return True
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return t.attr != tokens[first].off2int()
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pass
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return False
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class Python38ParserSingle(Python38Parser, PythonParserSingle):
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pass
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if __name__ == "__main__":
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# Check grammar
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# FIXME: DRY this with other parseXX.py routines
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p = Python38Parser()
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p.remove_rules_38()
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p.check_grammar()
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from uncompyle6 import PYTHON_VERSION, IS_PYPY
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if PYTHON_VERSION == 3.8:
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lhs, rhs, tokens, right_recursive, dup_rhs = p.check_sets()
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from uncompyle6.scanner import get_scanner
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s = get_scanner(PYTHON_VERSION, IS_PYPY)
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opcode_set = set(s.opc.opname).union(
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set(
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"""JUMP_BACK CONTINUE RETURN_END_IF COME_FROM
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LOAD_GENEXPR LOAD_ASSERT LOAD_SETCOMP LOAD_DICTCOMP LOAD_CLASSNAME
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LAMBDA_MARKER RETURN_LAST
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""".split()
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)
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)
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remain_tokens = set(tokens) - opcode_set
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import re
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remain_tokens = set([re.sub(r"_\d+$", "", t) for t in remain_tokens])
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remain_tokens = set([re.sub("_CONT$", "", t) for t in remain_tokens])
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remain_tokens = set(remain_tokens) - opcode_set
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print(remain_tokens)
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import sys
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if len(sys.argv) > 1:
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from spark_parser.spark import rule2str
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for rule in sorted(p.rule2name.items()):
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print(rule2str(rule[0]))
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