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92 lines
3.1 KiB
Python
92 lines
3.1 KiB
Python
# Copyright (c) 2018, 2022 Rocky Bernstein
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from spark_parser import DEFAULT_DEBUG as PARSER_DEFAULT_DEBUG
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from uncompyle6.parser import PythonParserSingle, nop_func
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from uncompyle6.parsers.parse15 import Python15Parser
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class Python14Parser(Python15Parser):
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def p_misc14(self, args):
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"""
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# Not much here yet, but will probably need to add UNARY_CALL,
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# LOAD_LOCAL, SET_FUNC_ARGS
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args ::= RESERVE_FAST UNPACK_ARG args_store
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args_store ::= STORE_FAST*
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call ::= expr tuple BINARY_CALL
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expr ::= call
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kv ::= DUP_TOP expr ROT_TWO LOAD_CONST STORE_SUBSCR
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mkfunc ::= LOAD_CODE BUILD_FUNCTION
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print_expr_stmt ::= expr PRINT_EXPR
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raise_stmt2 ::= expr expr RAISE_EXCEPTION
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star_args ::= RESERVE_FAST UNPACK_VARARG_1 args_store
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stmt ::= args
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stmt ::= print_expr_stmt
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stmt ::= star_args
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stmt ::= varargs
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varargs ::= RESERVE_FAST UNPACK_VARARG_0 args_store
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# Not strictly needed, but tidies up output
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stmt ::= doc_junk
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doc_junk ::= LOAD_CONST POP_TOP
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# Not sure why later Python's omit the COME_FROM
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jb_pop14 ::= JUMP_BACK COME_FROM POP_TOP
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whileelsestmt ::= SETUP_LOOP testexpr l_stmts_opt
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jb_pop14
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POP_BLOCK else_suitel COME_FROM
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print_items_nl_stmt ::= expr PRINT_ITEM_CONT print_items_opt PRINT_NEWLINE_CONT
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# 1.4 doesn't have linenotab, and although this shouldn't
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# be a show stopper, our CONTINUE detection is off here.
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continue ::= JUMP_BACK
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"""
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def __init__(self, debug_parser=PARSER_DEFAULT_DEBUG):
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super(Python14Parser, self).__init__(debug_parser)
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self.customized = {}
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def customize_grammar_rules(self, tokens, customize):
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super(Python14Parser, self).customize_grammar_rules(tokens, customize)
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self.remove_rules("""
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whileelsestmt ::= SETUP_LOOP testexpr l_stmts_opt
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jb_pop
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POP_BLOCK else_suitel COME_FROM
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""")
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self.check_reduce["doc_junk"] = "tokens"
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for i, token in enumerate(tokens):
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opname = token.kind
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opname_base = opname[:opname.rfind("_")]
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if opname_base == "UNPACK_VARARG":
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if token.attr > 1:
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self.addRule(f"star_args ::= RESERVE_FAST {opname} args_store", nop_func)
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def reduce_is_invalid(self, rule, ast, tokens, first, last):
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invalid = super(Python14Parser,
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self).reduce_is_invalid(rule, ast,
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tokens, first, last)
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if invalid or tokens is None:
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return invalid
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if rule[0] == 'doc_junk':
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return not isinstance(tokens[first].pattr, str)
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class Python14ParserSingle(Python14Parser, PythonParserSingle):
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pass
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if __name__ == '__main__':
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# Check grammar
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p = Python14Parser()
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p.check_grammar()
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p.dump_grammar()
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# local variables:
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# tab-width: 4
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