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67 lines
2.6 KiB
Python
67 lines
2.6 KiB
Python
# Copyright (c) 2016-2017 Rocky Bernstein
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"""
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spark grammar differences over Python 3.1 for Python 3.0.
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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 uncompyle6.parsers.parse31 import Python31Parser
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class Python30Parser(Python31Parser):
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def p_30(self, args):
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"""
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# FIXME: combine with parse3.2
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whileTruestmt ::= SETUP_LOOP l_stmts_opt JUMP_BACK
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COME_FROM_LOOP
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whileTruestmt ::= SETUP_LOOP returns
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COME_FROM_LOOP
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# In many ways Python 3.0 code generation is more like Python 2.6 than
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# it is 2.7 or 3.1. So we have a number of 2.6ish (and before) rules below
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_ifstmts_jump ::= c_stmts_opt JUMP_FORWARD _come_froms POP_TOP COME_FROM
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# Used to keep index order the same in semantic actions
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jb_pop_top ::= JUMP_BACK POP_TOP
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while1stmt ::= SETUP_LOOP l_stmts COME_FROM_LOOP
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else_suitel ::= l_stmts COME_FROM_LOOP JUMP_BACK
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ifelsestmtl ::= testexpr c_stmts_opt jb_pop_top else_suitel
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withasstmt ::= expr setupwithas store suite_stmts_opt
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POP_BLOCK LOAD_CONST COME_FROM_FINALLY
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LOAD_FAST DELETE_FAST WITH_CLEANUP END_FINALLY
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setupwithas ::= DUP_TOP LOAD_ATTR STORE_FAST LOAD_ATTR CALL_FUNCTION_0 setup_finally
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setup_finally ::= STORE_FAST SETUP_FINALLY LOAD_FAST DELETE_FAST
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# Need to keep LOAD_FAST as index 1
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set_comp_func_header ::= BUILD_SET_0 DUP_TOP STORE_FAST
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set_comp_func ::= set_comp_func_header
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LOAD_FAST FOR_ITER store comp_iter
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JUMP_BACK POP_TOP JUMP_BACK RETURN_VALUE RETURN_LAST
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comp_if ::= expr jmp_false comp_iter
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comp_iter ::= expr expr SET_ADD
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# In many ways 3.0 is like 2.6. The below rules in fact are the same or similar.
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jmp_true ::= JUMP_IF_TRUE POP_TOP
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jmp_false ::= JUMP_IF_FALSE POP_TOP
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for_block ::= l_stmts_opt _come_froms POP_TOP JUMP_BACK
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except_handler ::= JUMP_FORWARD COME_FROM_EXCEPT except_stmts
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POP_TOP END_FINALLY come_froms
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return_if_stmt ::= ret_expr RETURN_END_IF POP_TOP
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and ::= expr JUMP_IF_FALSE POP_TOP expr COME_FROM
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"""
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def customize_grammar_rules(self, tokens, customize):
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super(Python30Parser, self).customize_grammar_rules(tokens, customize)
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return
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pass
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class Python30ParserSingle(Python30Parser, PythonParserSingle):
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pass
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