[antlr-interest] Problems with first example

Terence Parr parrt at cs.usfca.edu
Mon Dec 21 09:40:13 PST 2009

and don't forget hitting ctrl-z for EOF if you're a PC person or ctrl- 
d if you're a unix guy, as gawd intended ;)
On Dec 21, 2009, at 6:30 AM, John B. Brodie wrote:

> Greetings!
> On Mon, 2009-12-21 at 09:08 -0500, Bill Ramsay wrote:
>> Hello,
>> I'm new to Antlr and am trying to work through the Definitive  
>> Guide.   I can't seem to get the first example to work.
>> I create the .g file and lexer and parser classes fine.   I compile  
>> my example test program fine.   And it runs fine.  Except for one  
>> minor problem - it doesn't work.   I put a few debug lines in the  
>> code and  it gets hung up on the line:
>>    ANTLRInputStream input = new ANTLRInputStream(System.in);
>> It never seems to move past this line.   The code used is copied  
>> from the book,page 10 - 12.
> System.in is java-speak for the standard input device which, unless  
> you
> have redirected it, is your keyboard.
> So this line is establishing a I/O connection with the keyboard in  
> order
> to read in text to be parsed.
> It would seem that everything is working just fine.
> You simply need to type some text into your keyboard so that the  
> example
> grammar may parse it for you (or re-direct stdin to a disk file).
> Hope this helps...
>   -jbb
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