[antlr-interest] .g vs .g4

[Eric]

On Sun, Nov 6, 2011 at 12:29 PM, Eric <researcher0x00 at gmail.com> wrote:

>
>
> On Sun, Nov 6, 2011 at 12:22 PM, Terence Parr <parrt at cs.usfca.edu> wrote:
>
>> Hi, Sam Harwell and I are talking about the file extension for new ANTLR
>> 4. We think it makes good sense to use .g4 to distinguish the new grammars.
>> They're mostly compatible except that there is no need for syntactic
>> predicates and .g4 allows immediate left recursion. I think it will reduce
>> confusion about what version of ANTLR is necessary to compile a grammar.
>>
>> Ter
>>
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>
> Hi Ter,
>
> Will v4 require the file type to be .g4, or will it accept .g and .g4?
>
> My preference is for .g4 only.
>
> Also, will there be a property in the grammar file that identifies the
> minimum version or required version. I think it would help for obvious
> reasons such as when a user post a grammar needing help or an example
> grammar is given.
>
> Thanks, Eric
>
>
>