what are the meaning of ? and + in http://www.moosetechnology.org/docs/mse

> * = 0, 1 or many
>
> now what means ? and +
> + = 1 or many
> ? optional ?
>
> what is the standard used to describe the grammar?
>
> Stef
>
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> • ? : which means that the symbol (or group of symbols in parenthesis) to the left of the operator is optional (it can appear zero or one times)
> • * : which means that something can be repeated any number of times (and possibly be skipped altogether)
> • + : which means that something can appear one or more times
>
> doru can you add that to the moose web site?
> I will add that to the document I'm writing.
>
> On Oct 31, 2011, at 10:28 PM, Stéphane Ducasse wrote:
>
>> * = 0, 1 or many
>>
>> now what means ? and +
>> + = 1 or many
>> ? optional ?
>>
>> what is the standard used to describe the grammar?
>>
>> Stef
>>
>> _______________________________________________
>> Moose-dev mailing list
>> [hidden email]
>> https://www.iam.unibe.ch/mailman/listinfo/moose-dev
>
>
> _______________________________________________
> Moose-dev mailing list
> [hidden email]
> https://www.iam.unibe.ch/mailman/listinfo/moose-dev