[stringtemplate-interest] Different formats for data

[Mark Wright]

Some ideas:

(1)
http://www.antlr.org/wiki/display/ST/Object+rendering

(2)
You can create a variable in the tree grammar action code that
has 2 attributes, one for each way the date is formatted:

public class NameSTV {
  protected String name;
  protected String typeVariableName;

  public NameSTV(String theName, String theTypeVariableName) {
    name = theName;
    typeVariableName = theTypeVariableName;
  }

  public final String getName() {
    return name;
  }

  public final String getTypeVariableName() {
    return typeVariableName;
  }
}

Which can be set in the tree grammar something like:

base_specifier
 :   ^(BASE IDENTIFIER FULLY_QUALIFIED_NAMESPACE TYPE_VARIABLE_NAME)
     {
      NameNamespaceSTV b = new NameNamespaceSTV($IDENTIFIER.text, $FULLY_QUALIFIED_NAMESPACE.text, $TYPE_VARIABLE_NAME.text);
      $st = %baseSpecifier();
      %{$st}.variable=b;
     }
 ;

Although I wrote this, I am still trying to figure it out myself.
I do not currently understand what the baseSpecifier string template
does.

Anyway, in the string template if you do:

<variable.name>

it calls the getName() property.

Regards, Mark

On Tue, 12 Feb 2008 16:32:54 -0500
FranklinChen at cmu.edu wrote:

> I have an application using ANTLR3 and StringTemplate that basically
> parses data and then outputs it in two very different formats.  For
> example, dates need to be output as both 12-FEB-2008 and 2008-02-12.
> I would like advice on how to do this, using a single tree grammar and
> two ST group files.  E.g., if the tree grammar has
> 
> birthdate
>     :
>         DATE
>         ->
>         birthdate(date={$DATE.text})
>     ;
> 
> then there is a problem, because of the strict separation that
> apparently prevents me from having birthdate() in A.stg and B.stg do
> "computations" to reformat the date.  E.g., suppose DATE came from the
> lexer as 12-FEB-2008.  Then A.stg's birthdate() is trivial, but
> B.stg's birthdate() can't be done.  What is the solution?
> 


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