[antlr-interest] Multiple string template rule

[Tim Poole]

:$

That's a bit embarrasing!

OK, so I am actually trying to do a similar thing for both the OR 
statements and the AND statements.

What I didn't explain was that the "<bf ...>" expression isn't 
contributing anything, so it looks like the "b+=andExpr" isn't catching 
anything from the token.

There is an example rule including "( p+=parameterDef )*" but this is 
slightly different to my "(OR b+=andExpr)*".

I suspect that I probably need something closer to "<bf:{ expr | \|\| 
<expr> }>".
I have tried something similar, but the lack of data in bf seems to be 
the limiting factor.

I'm hoping it's possible, just that I don't understand how to do it, yet.

Any thoughts gratefully received...

I'm trying to convert:

rule != "working" or mental_state == "distressed"

into:

rule != "working" || mental_state == "distressed"

Obviously, this snippet of grammar doesn't cover the expressions
(andExpr) on either side of the "or", but I hope it gives you a
flavour of what I'm trying to achieve.

orExpr
      : a=andExpr (OR b+=andExpr)* ->  template(a={$a.text}, bf={$b}) "<a><bf; separator=\" || \">"
      ;

Regards,

Tim.

On 25/10/2011 17:02, Jim Idle wrote:
> Probably because you are modifying the OR rule and not the AND rule.
>
> Jim
>
>> -----Original Message-----
>> From: antlr-interest-bounces at antlr.org [mailto:antlr-interest-
>> bounces at antlr.org] On Behalf Of Tim Poole
>> Sent: Tuesday, October 25, 2011 8:54 AM
>> To: antlr-interest at antlr.org
>> Subject: [antlr-interest] Multiple string template rule
>>
>> Hi all,
>>
>> I'm trying to use the += in the following rule, but I'm not sure if my
>> use of it is correct.
>>
>> Does anyone have any thoughts?
>>
>> I'm trying to convert:
>>
>> rule != "working" and mental_state == "distressed"
>>
>> into:
>>
>> rule != "working"&&  mental_state == "distressed"
>>
>> Obviously, this snippet of grammar doesn't cover the expressions
>> (andExpr) on either side of the "and", but I hope it gives you a
>> flavour of what I'm trying to achieve.
>>
>> orExpr
>>       : a=andExpr (OR b+=andExpr)* ->  template(a={$a.text}, bf={$b})
>> "<a><bf; separator=\"&&  \">"
>>       ;
>>
>> Regards,
>>
>> Tim.
>>
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