[stringtemplate-interest] StringTemplateGroup from String vs. loaded with CommonGroupLoader: Inconsistent Rendering behaviour

[Thilo Ernst]

Hello StringTemplate users,

and first of all, thanks to Terence Parr for such a powerful library.
I'm still pretty new to ST so I'm in doubt whether the following problem
is a bug in ST or simply my own lack of sufficient insight. Here we go:

I first tried the introductory example from
http://www.antlr.org/wiki/display/ST/Group+Files, which creates
a StringTemplateGroup from a string using a StringReader instance:

        String templates = "group simple; vardef(type,name)::= \"$type$
<name>;\"";
        StringTemplateGroup group = new StringTemplateGroup(new
StringReader(templates));
        StringTemplate t = group.getInstanceOf("vardef");
        t.setAttribute("type", "int");
        t.setAttribute("name", "foo");
        System.out.println("Generated: [["+t.toString()+"]]");

Expectedly, this works:
         Generated: [[int foo;]]

Now I tried to get the same thing to work with a StringTemplateGroup
loaded with a
PathGroupLoader:

            String location="templates";
            StringTemplateGroupLoader loader =
            new PathGroupLoader(location, new LogSTEL());
            StringTemplateGroup.registerGroupLoader (loader);
            StringTemplateGroup group = StringTemplateGroup.loadGroup
("test");
            System.out.println("TemplateGroup loaded ");
            StringTemplate t = group.getInstanceOf("vardef");
            t.setAttribute("type", "int");
            t.setAttribute("name", "foo");
            System.out.println("Generated: [["+t.toString()+"]]");

This is the contents of templates/test.stg:

  group simple;
  vardef(type,name) ::= "$type$ <name>;"

The output:
              Generated: [[int <name>;]]

That is, surprisingly, the <..> expressions are not substituted, while
the $...$
are.

I don't think the interpolation behaviour should depend on the way the
StringTemplateGroup object is created. Did I run into a bug, or am I
just too
stupid?

NB: The problem occurs as well when using CommonGroupLoader.
I'm using stringtemplate-3.0 on j2sdk1.5-sun. Any hints appreciated.

Best regards, Thilo