UtherII on Reddit /r/rust suggested an idea I like:
&{'lt} T
T{'lt}
Basically "option 8" of
http://smallcultfollowing.com/babysteps/blog/2012/12/30/lifetime-notation/
with ' from https://mail.mozilla.org/pipermail/rust-dev/2013-January/002942.html
This does need a lookahead but as far as I can tell unambiguous and manageable.
More on:
http://www.reddit.com/r/rust/comments/17ka3b/meeting_weekly_20130129_region_syntax_impl_type/c86t7wg
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