Re: how does the JLS deal with the >> ambiguity?

[sf <sf at b-i-t dot de>]

Adam Megacz wrote:
> This probably isn't the perfect mailing list for this, but it's close ;)
>
> In C++ there's a known ambiguity where you have to put a space between
> two right-angle brackets in a template instantiation:
>
>    Foo<Bar,Baz<Bop> >
>
> Otherwise the ">>" is treated as the "shift-right" token by the lexer.
>
> I was wondering how JLS 1.5 handles this, since Javac seems to do just
> fine when the space isn't there.  The JLS itself isn't sufficiently
> formal at the lexical level to clarify this -- it just says that '>'
> "is a token" and '>>' "is a token".

There is a section called "2.3 Handling Consecutive Type Parameter 
Brackets" in 
http://www.cis.unisa.edu.au/~pizza/gj/Documents/gj-specification.pdf.

As I understand it all cases of single and double (and in Java even 
triple) right-angle braces are handled in the parser.

Hope it helps

	Stephan