[stringtemplate-interest] ST4: Pass Thru (...) support for indirect includes

[Udo Borkowski]

Is there a reason why indirect includes don't support Pass Thru (…)?

E.g.

t1(x) ::= "<x>"
main(x="hello",t="t1") ::= "<(t)(...)>"

will emit the following error:

	t.stg 2:34: mismatched input '...' expecting RPAREN


However explicitly passing the parameter (x) with the indirect include, like in this example:

t1(x) ::= "<x>"
main(x="hello",t="t1") ::= "<(t)(x)>"

works fine.


If there is no real reason for this restriction I suggest to add "Pass Thru" support for indirect calls into the next release of ST4.  


Udo

P.S.: Possibly the same applies for "named arguments" and indirect includes.

P.P.S.: here the test case:

	@Test
	public void testIndirectCallWithPassThru() throws Exception {
		String path = tmpdir + "t.stg";

		// indirectly call t1, with explicit parameter passing
		writeFile(tmpdir, "t.stg",
				"t1(x) ::= \"<x>\"\nmain(x=\"hello\",t=\"t1\") ::= <<\n<(t)(x)>\n>>");
		STGroup group = new STGroupFile(tmpdir + "/t.stg");
		ST st = group.getInstanceOf("main");
		String s = st.render();
		Assert.assertEquals("hello", s);

		// indirectly call t1, with "pass thru" (...) parameter passing
		// (used to fail with:
		// "t.stg 2:21: mismatched input '...' expecting RPAREN")
		writeFile(tmpdir, "t.stg",
				"t1(x) ::= \"<x>\"\nmain(x=\"hello\",t=\"t1\") ::= <<\n<(t)(...)>\n>>");
		group = new STGroupFile(tmpdir + "/t.stg");
		st = group.getInstanceOf("main");
		s = st.render();
		Assert.assertEquals("hello", s);
	}


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