[antlr-interest] Language Design Patterns Section 12.5 Problem
Jan Nielsen
jan.sture.nielsen at gmail.com
Mon Aug 31 22:24:47 PDT 2009
I'm not sure if this is the right forum to discuss a little problem I
encountered in section 12.5 of Language Design Patterns (B6.0), but
I'm sure this is the most likely spot for some help...I got the
following:
java -cp antlr-3.1.3.jar org.antlr.Tool Cymbol.g Gen.g
warning(200): Cymbol.g:94:45: Decision can match input such as
"'else'" using multiple alternatives: 1, 2
As a result, alternative(s) 2 were disabled for that input
error(100): :1:1: syntax error: antlr: Gen.g:1:1: unexpected token: operator
error(10): internal error: Exception java.lang.ClassCastException:
antlr.CommonToken cannot be cast to
antlr.TokenWithIndex at antlr.TokenStreamRewriteEngine.next
Token(TokenStreamRewriteEngine.java:161): can't parse template action
error(100): Gen.g:0:0: syntax error: codegen: <AST>:0:0: unexpected
end of subtree
Per the eBook, I'm expecting the warning(200) but the errors end up
causing the generated Gen.java to break:
Gen.java:1851: illegal start of expression
retval.st = ;
^
1 error
Any thoughts from those of you who have paid for the EA eBook (or
written it :-)?
Thanks,
Jan
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