[antlr-interest] Calling scala methods from ANTLR grammar - lots of warnings!

[Alex Eagle]

Hi Terrance and others,

I'm using ANTLR3, and in my tree grammar I'm assembling an object
model in Scala. When I add elements to a
scala.collection.mutable.Buffer, there's a method in scala "+=" which
is emitted into java bytecode as "$plus$eq".

So my grammar has chunks like this:
importDeclaration
	: ^('import' name=qualifiedType)
	{ $SourceFile::file.imports().$plus$eq($name.text); }
	;

The problem is that antlr gets upset about the "$plus" and "$eq" and
prints errors:
error(114): /Users/alexeagle/IdeaProjects/noop/src/main/antlr/NoopAST.g:72:2:
attribute is not a token, parameter, or return value: eq
error(114): /Users/alexeagle/IdeaProjects/noop/src/main/antlr/NoopAST.g:77:2:
attribute is not a token, parameter, or return value: plus

But, the grammar is still generated and works fine. So it's just annoying.

I've tried to find a way to escape those dollar signs, but no luck. Any ideas?

Thanks!
-Alex