Last change
on this file since 1 was
1,
checked in by lnalod, 15 years ago
|
Initial import of YAO sources
|
File size:
1.3 KB
|
Rev | Line | |
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[1] | 1 | // This file is part of PyANTLR. See LICENSE.txt for license |
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| 2 | // details..........Copyright (C) Wolfgang Haefelinger, 2004. |
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| 3 | // |
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| 4 | // $Id$ |
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| 5 | |
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| 6 | header "Lexer.__main__" { |
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| 7 | // main - create and run lexer from stdin |
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| 8 | if __name__ == "__main__": |
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| 9 | import sys |
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| 10 | import antlr |
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| 11 | import columns_l |
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| 12 | |
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| 13 | // create lexer - shall read from stdin |
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| 14 | L = columns_l.Lexer() |
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| 15 | |
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| 16 | try: |
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| 17 | token = L.nextToken() |
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| 18 | while not token.isEOF(): |
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| 19 | print token |
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| 20 | token = L.nextToken() |
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| 21 | |
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| 22 | except antlr.TokenStreamException, e: |
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| 23 | print "error: exception caught while lexing:", e |
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| 24 | |
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| 25 | // end of main |
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| 26 | } |
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| 27 | |
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| 28 | options { |
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| 29 | language=Python; |
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| 30 | } |
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| 31 | // not working: Lexer not seen at this place .. |
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| 32 | // { |
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| 33 | // if __name__ == "__main__": |
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| 34 | // import columns_l |
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| 35 | // Lexer.main() |
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| 36 | |
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| 37 | // } |
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| 38 | class columns_l extends Lexer; |
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| 39 | |
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| 40 | { |
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| 41 | done = False; |
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| 42 | |
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| 43 | def uponEOF(self): |
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| 44 | done=True |
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| 45 | |
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| 46 | def tab(self): |
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| 47 | t = 4; |
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| 48 | c = self.getColumn(); |
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| 49 | nc = (((c-1)/t)+1)*t+1; |
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| 50 | self.setColumn( nc ) |
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| 51 | |
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| 52 | def main(): |
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| 53 | lexer = columns_l.Lexer() |
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| 54 | while not Lexer.done: |
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| 55 | t = lexer.nextToken(); |
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| 56 | print "Token: ",t |
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| 57 | |
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| 58 | main = staticmethod(main) |
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| 59 | } |
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| 60 | |
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| 61 | INT : ('0'..'9')+ ; |
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| 62 | |
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| 63 | ID : ('a'..'z')+ ; |
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| 64 | |
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| 65 | WS : (' '|'\t'|'\n'{ self.newline();})+ {$setType(SKIP)} |
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| 66 | ; |
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