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86 lines
2.2 KiB
Python
86 lines
2.2 KiB
Python
"""
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tests/SimpleParser.py -- created Mon Feb 28 13:13:57 2000
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This file was automatically generated by the PyLR parser generator.
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It defines the tables 'actiontable', 'gototable', and 'prodinfo'. These
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tables are used to give functionality to a parsing engine. It also defines
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A Parser class called SimpleParser which will use this engine. It's usage
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is indicated in SimpleParser's doc-string.
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"""
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#
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# this section contains source code added by the user
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# plus 'import PyLR'
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#
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import SimpleLexer
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import PyLR
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#
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# the action table means
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# ('s', -1) shift
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# ('r', <n>) reduce with production n
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# ('a', -1) accept
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# ('', -1) error
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# each row represents a state and each column a terminal lookahead symbol
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# Lexer symbols are:
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# ['EOF', 'c', 'd']
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#
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_actiontable = [
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[('r', 2), ('r', 2), ('', -1)],
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[('a', -1), ('s', 2), ('', -1)],
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[('a', -1), ('', -1), ('s', 3)],
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[('r', 1), ('r', 1), ('', -1)]
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]
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#
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# the goto table, each row represents a state
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# and each column the nonterminal that was on the lhs of the
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# reduction
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#
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_gototable = [
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[1],
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[None],
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[None],
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[None]
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]
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#
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# This is the prodinfo table. each row represents a production
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# the entries are the length of the production, the name of a method
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# in an instance of the SimpleParser class below that gets called
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# when that production occurs, and the index of the lhs in the
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# nonterminals (as in the gototable)
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#
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_prodinfo = [
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(3, 'unspecified', 0), # S: S 1 2 (unspecified)
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(0, 'unspecified', 0), # S: (unspecified)
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]
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class SimpleParser(PyLR.Parser):
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"""
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this class was produced automatically by the PyLR parser generator.
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It is meant to be subclassed to produce a parser for the grammar
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S: S c d (unspecified);
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S: (unspecified);
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While parsing input, if one of the above productions is recognized,
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a method of your sub-class (whose name is indicated in parens to the
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right) will be invoked. Names marked 'unspecified' should be ignored.
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usage:
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class MySimpleParser(SimpleParser):
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# ...define the methods for the productions...
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p = MySimpleParser(); p.parse(text)
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"""
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def __init__(self):
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lexer = SimpleLexer.SimpleLexer()
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PyLR.Parser.__init__(self, lexer, _actiontable, _gototable, _prodinfo)
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