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71 lines
2.3 KiB
Python
71 lines
2.3 KiB
Python
# Copyright (c) 2018 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
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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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# Nothing here yet, but will need to add UNARY_CALL, BINARY_CALL,
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# RAISE_EXCEPTION, BUILD_FUNCTION, UNPACK_ARG, UNPACK_VARARG, LOAD_LOCAL,
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# SET_FUNC_ARGS, and RESERVE_FAST
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# FIXME: should check that this indeed around __doc__
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# Possibly not strictly needed
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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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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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