[antlr-interest] Throwing a exception in a rule
Gavin Lambert
antlr at mirality.co.nz
Wed Aug 29 05:43:52 PDT 2007
At 00:30 30/08/2007, Alexandre Hamez wrote:
>I try to declare a rule that throws an exception, but when I
look
>at the generated code, the corresponding method doesn't throws
this
>exception. The code is the following:
[...]
>So, am I missing something?
IIRC, currently v3 does not implement throw specs. (And I'm not
sure if it supports catch blocks yet either.)
The simplest workaround at the moment is to make sure that
whatever you're trying to throw derives from
RecognitionException. (If need be you can catch it outside the
lexer/parser and convert it to some other type if you don't want
other code to have to deal with RecognitionExceptions.)
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