- Added missing ifdef guard in PointerIntEnum header
- Consistent naming convention for ifdef guards
- Consistent 'end namespace swift'
- Consistent single EOL at end of header files
This implements the logic of storing "absent" values as 0 and "present"
values as the enumerator's underlying value plus 1. For enums whose raw
values are arbitrary or small, this is a safe, space-efficient way to add
the "absent" value.
The type has been designed to be used with PointerIntPair, so it converts
(explicitly) to intptr_t, and (explicitly) from any integral type.
Adopt this for use with the Accessibility bits in a ValueDecl.
No intended functionality change.
Swift SVN r20597
