cplusplus/draft — pull request #112 by jwakely (2013-05-10 22:31:35+00:00)
Title: Library N3672, a utility class to represent optional objects

Editorial fixes relative to the proposal:

- reorganize [optional.defs]/1 as an itemized list
- reword [optional.object]/2
- reword [optional.object.ctor]/2
- add `constexpr` specifier to constructor declarations to match synopsis and _Remarks_
- correct [optional.object.observe]/18 to depend on both constructors