[antlr-interest] Implementing main method in ANTLR

[William v Doorn]

Hello --

I don't fully understand it yet, now my top-level rule is just a rule who
defines a list of lines. But - if I start parsing at the main method - those
other functions in the files aren't parsed and when I'm parsing them and I
have a print statement there it will print right away.

So I kind of need to parse everything and store it in my java-classes,
without executing anything in the functions - is this possible, would this
require much editting?

Thanks,

William van Doorn

2010/4/14 Cliff Hudson <cliff.s.hudson at gmail.com>

> A simple main method would be one which determines where the input is going
> to be coming from, then creates an input stream based on that location (for
> instance, an ANTLRStringStream for something from a string, or
> ANTLRFileStream for something from a file.)  Then you create your Lexer and
> pass that input to the lexer.  You then create a token stream, such as
> CommonTokenStream and pass it your lexer.  You then create your parser and
> pass it your token stream.  You then invoke which ever rule you wish on your
> parser - typically your top level rule whatever that may be.  If you are
> using a tree parser, your parser call will return a tree.  You would then
> instantiate your tree parser, and invoke one of its rules passing in your
> tree.  Repeat this sequence for as many inputs as you desire.
>
> On Wed, Apr 14, 2010 at 11:27 AM, William v Doorn <williamvdoorn at gmail.com
> > wrote:
>
>> Hello,
>>
>> I've been working with ANTLR for quite some time now - and now I want to
>> implement a main method per file. However, I really have no idea how to do
>> this. I'm generating AST trees and then walk over those. But, how would I
>> implement a main method?
>>
>> If anyone has an idea/approach on how to go about it - please tell me,
>> thanks.
>>
>> William v. Doorn
>>
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