Tracking RFC 11 - bounded struct typarams

[brson]

https://github.com/rust-lang/rfcs/blob/master/active/0011-bounded-type-parameters.md

Nominating.

[pcwalton]

Do we have a plan for how to implement this? The RFC doesn't specify how to do it, and this is…a lot of work because of the way vtables work. I'm a little unhappy with the scope creep here. :(

[pnkfelix]

Since this is almost entirely unimplemented, there are no current 1.0 blocking parts of it.

(if we were to implement it only partially, then it would become a backwards compatibiilty risk.)

[pnkfelix]

assigning P-high, not 1.0 milestone.

[brson]

This needs a volunteer to implement.

[pcwalton]

Nominating for 1.0 P-backcompat-lang due to the desire to use this in important types like HashMap.

[pnkfelix]

P-backcompat-lang, 1.0