rust-lang/rust — pull request #16318 by nikomatsakis (2014-08-07 09:33:12+00:00)
Title: Temporary bootstrapping hack: introduce syntax for lifetime bounds

Introduce syntax for lifetime bounds like `'b:'a`, meaning `'b outlives 'a`. Syntax currently does nothing but is needed for full fix to #5763. To use this syntax, the issue_5763_bootstrap feature guard is required.