[stringtemplate-interest] Help with recursive template application

[Terence Parr]

might be bug where i ignore arg if only one formal arg and you iterate.
Ter
On Aug 22, 2009, at 5:02 AM, Vincent Dupuis wrote:

> If you have time to try it, here is the code:
>
> Main.java :
>
> package javaapplication2;
>
> import java.io.FileNotFoundException;
> import java.io.FileReader;
> import java.io.IOException;
> import java.util.ArrayList;
> import java.util.List;
> import org.antlr.stringtemplate.StringTemplate;
> import org.antlr.stringtemplate.StringTemplateGroup;
>
> public class Main
> {
>     public static void main(String[] args)
>     {
>         StringTemplateGroup stg;
>         stg = openTemplateFile("templates.stg");
>
>         StringTemplate aClass;
>         StringTemplate aClass2;
>         List list = new ArrayList();
>         List list2 = new ArrayList();
>
>         aClass = new StringTemplate();
>         aClass.setAttribute("name", "A");
>         list.add(aClass);
>
>         aClass2 = new StringTemplate();
>         aClass2.setAttribute("name", "InnerB");
>         list2.add(aClass2);
>
>         aClass = new StringTemplate();
>         aClass.setAttribute("name", "B");
>         aClass.setAttribute("listOfSubClasses", list2);
>         list.add(aClass);
>
>         aClass = new StringTemplate();
>         aClass.setAttribute("name", "C");
>         list.add(aClass);
>
>         StringTemplate st = stg.getInstanceOf("mainTemplate");
>         st.setAttribute("listOfClasses", list);
>
>         System.out.println(st.toString());
>     }
>
>     private static StringTemplateGroup openTemplateFile(String  
> fileName)
>     {
>         try
>         {
>             FileReader fileReader;
>             fileReader = new FileReader(fileName);
>
>             StringTemplateGroup templates;
>             templates = new StringTemplateGroup(fileReader);
>
>             fileReader.close();
>
>             return templates;
>         }
>         catch (FileNotFoundException e)
>         {
>             System.err.println(e.toString());
>             System.exit(1);
>             return null;
>         }
>         catch (IOException e)
>         {
>             System.err.println(e.toString());
>             System.exit(1);
>             return null;
>         }
>     }
> }
>
>
> templates.stg :
>
> group templates;
>
> mainTemplate(listOfClasses) ::= <<
> <listOfClasses:classDeclaration(parent="TopClass"); separator="\n">
> >>
>
> classDeclaration(parent) ::= <<
> class <it.name> : public <parent>
> {
>     <it.listOfSubClasses:classDeclaration(parent=it.name);  
> separator="\n">
> }
> >>
>
>
> Expected output for class B :
>
> class B : public TopClass
> {
>     class InnerB : public B
>     {
>     }
> }
>
>
> V
>
> From: parrt at cs.usfca.edu
> To: vincedupuis at hotmail.com
> Subject: Re: [stringtemplate-interest] Help with recursive template  
> application
> Date: Fri, 21 Aug 2009 17:09:12 -0700
>
> verrrry strange. not sure what's up.
> Ter
> On Aug 21, 2009, at 4:24 PM, Vincent Dupuis wrote:
>
> I retried just to be sure, but it doesn't work.
>
> I removed the iter parameter and use <it> in classDeclaration
> and I still don't get the good output. (see blow).
>
> V
>
>
> > CC: stringtemplate-interest at antlr.org
> > From: parrt at cs.usfca.edu
> > To: vincedupuis at hotmail.com
> > Subject: Re: [stringtemplate-interest] Help with recursive  
> template application
> > Date: Fri, 21 Aug 2009 11:21:35 -0700
> >
> >
> > On Aug 21, 2009, at 6:40 AM, Vincent Dupuis wrote:
> >
> > > Terence, thanks for your reply.
> > >
> > > After I read your comments, I tried many combination to make it  
> work
> > > and the only way was to explicitly assign parameters to the  
> template
> > > like this:
> > >
> > > group templates;
> > >
> > > mainTemplate(listOfClasses) ::= <<
> > > <listOfClasses:classDeclaration(iter=it, parent="TopClass");
> > > separator="\n">
> > > >>
> >
> > > <listOfClasses:classDeclaration(parent="TopClass");  
> separator="\n">
> >
> > and
> >
> > > classDeclaration(parent) ::= <<
> >
> > will work if youuse <it> in classDeclaration.
> >
> > >
> > > classDeclaration(iter, parent) ::= <<
> > > class <iter.name> : public <parent>
> > > {
> > > <iter.listOfSubClasses:classDeclaration(parent=iter.name,
> > > iter=it); separator="\n">
> > > }
> > > >>
> > >
> > > Notice that the parameters are reversed in the second call to
> > > classDeclaration().
> > > It doesn't work if I don't reverse them!?
> >
> > nor should you expect it to. no assumed order of operations even in
> > param list. it has to pick one and it does in order.
> >
> > T
> >
> > >
> > > Anyway it works, but I don't know if it's normal.
> > > Maybe I missed something.
> > >
> > > Vincent
> > >
> > >
> > >
> > > > CC: stringtemplate-interest at antlr.org
> > > > From: parrt at cs.usfca.edu
> > > > To: vincedupuis at hotmail.com
> > > > Subject: Re: [stringtemplate-interest] Help with recursive
> > > template application
> > > > Date: Thu, 20 Aug 2009 11:53:22 -0700
> > > >
> > > >
> > > > On Aug 19, 2009, at 6:28 PM, Vincent Dupuis wrote:
> > > >
> > > > > Hi,
> > > > >
> > > > > I'm trying to pass a "parent" value in a recursive template
> > > > > application
> > > > > but without success. Here are my templates:
> > > > >
> > > > > group templates;
> > > > >
> > > > > mainTemplate(listOfClasses) ::= <<
> > > > > <listOfClasses:classDeclaration("TopClass"); separator="\n">
> > > > > >>
> > > >
> > > > you are passing to parameters here: the iterated value and the
> > > string.
> > > > If there is one parameter, the iteration operator sets that sole
> > > > parameter to the iterated value.
> > > > T
> > > >
> > > > >
> > > > > classDeclaration(parent) ::= <<
> > > > > class <it.name> : public <parent>
> > > > > {
> > > > > <it.listOfSubClasses:classDeclaration({<it.name>});
> > > > > separator="\n">
> > > > > }
> > > > > >>
> > > > >
> > > > > Considering A, B, and C classes are TopClass and that BB class
> > > is an
> > > > > inner class of B.
> > > > >
> > > > > and the output is...
> > > > >
> > > > > class A : public TopClass
> > > > > {
> > > > > }
> > > > > class B : public TopClass
> > > > > {
> > > > > class BB : public BB
> > > > > {
> > > > > }
> > > > > }
> > > > > class C : public TopClass
> > > > > {
> > > > > }
> > > > >
> > > > >
> > > > > Why I don't get the right value for class BB ?
> > > > > Like:
> > > > >
> > > > > class BB : public B
> > > > > {
> > > > > }
> > > > >
> > > > >
> > > > > Somebody knows why?
> > > > >
> > > > > Thanks,
> > > > >
> > > > > Vince
> > > > >
> > > > >
> > > > > Créez un personnage à votre image pour votre WL Messenger  
> Venez
> > > voir
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> > > >
> > >
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> >
>
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>
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