rust-lang/rust — pull request #19449 by nikomatsakis (2014-12-02 01:29:00+00:00)
Title: Implement the `Fn` trait for bare fn pointers in the compiler

Implement the `Fn` trait for bare fn pointers in the compiler rather
than doing it using hard-coded impls. This means that it works also
for more complex fn types involving bound regions.