[antlr-interest] Passing extra arguments to constructor?

[Scott Stanchfield]

It's easier to create instance variables and setter methods in the parser:

header {
...
}

class MyParser extends Parser;

{
  private SomeType someVariable_;
  public void setSomeVariable(SomeType someVariable) {
    someVariable_ = someVariable;
  }
} 

rule1:
  ...

Then after you create the parser instance, and before you trigger the
top-level rule, just set the values you need.

(You should be able to do this in most other OO target languages as well,
though I've only used ANTLR for Java)

-- Scott

> -----Original Message-----
> From: antlr-interest-bounces at antlr.org 
> [mailto:antlr-interest-bounces at antlr.org] On Behalf Of O.E. Dragon
> Sent: Monday, July 31, 2006 8:02 AM
> To: antlr-interest at antlr.org
> Subject: Re: [antlr-interest] Passing extra arguments to constructor?
> 
> On Mon, 31 Jul 2006 12:35:20 +0200
>  "Peter Palotas" <peter.palotas at gmail.com> wrote:
> > I was wondering if it is possible to specify additional 
> arguments to 
> > pass to the generated Parser's constructor and how this should be
> done?
> 
> Hi,
> 
> In Java, you could create a subclass to the Parser class 
> generated by ANTLR. This class would have the contructors you 
> want and would call
> super(...) with the generated Parser's usual arguments. I 
> presume you could do something similar in C#, C++ or Python 
> as those are all OO languages, but I have no experience with them.
> 
> Cheers,
> -Olivier
>