This patch changes the DWARF representation of bound generic enums to a nested
struct where the (sized) outer struct is anonymous and thus distinct and the
inner struct in uniqued and sizeless.
BoundGenericEnums may have different sizes depending on what they are bound to,
but still share a mangled name.
rdar://problem/56521648
This commit defines the ‘Any’ keyword, implements parsing for composing
types with an infix ‘&’, and provides a fixit to convert ‘protocol<>’
- Updated tests & stdlib for new composition syntax
- Provide errors when compositions used in inheritance.
Any is treated as a contextual keyword. The name ‘Any’
is used emit the empty composition type. We have to
stop user declaring top level types spelled ‘Any’ too.
