On 05/30/2013 04:56 AM, Niko Matsakis wrote: > Another example is in Hashmaps, where we offer two variants on the > "find-or-insert" pattern: > > fn find_or_insert(&mut self, K, V) -> Option<&V> > fn find_or_insert_with(&mut self, K, &fn(&K) -> V) -> Option<&V> > > Under my proposal there would just be: > > fn find_or_insert(&mut self, K, &fn(&K) -> V) -> Option<&mut V> > fn find_or_insert_zero(&mut self, K) -> Option<&mut V> // where V:Zero > > Thoughts?
I like the idea of the closure, but (as a relative newcomer), how would the Zero trait be specified? Wouldn't it require all HashMap's V's implement Zero? -- Tommy M. McGuire mcgu...@crsr.net _______________________________________________ Rust-dev mailing list Rust-dev@mozilla.org https://mail.mozilla.org/listinfo/rust-dev
