Make reprs use a structured representation instead of a slice#39595

Merged

bors merged 2 commits intorust-lang:masterfrom ahicks92:structured_repr

Feb 9, 2017

+116-94

Commits on Feb 7, 2017

Introduce ReprOptions, a struct for holding info from the repr attributes. This effectively deprecates lookup_repr_hints.
ahicks92
committed
Refactor layout to use the new ReprOptions
ahicks92
committed