* Eradicate IndexDistance associated type, replacing with Int everywhere
* Consistently use Int for ExistentialCollection’s IndexDistance type.
* Fix test for IndexDistance removal
* Remove a handful of no-longer-needed explicit types
* Add compatibility shims for non-Int index distances
* Test compatibility shim
* Move IndexDistance typealias into the Collection protocol
* Refactor Indices and Slice to use conditional conformance
* Replace ReversedRandomAccessCollection with a conditional extension
* Refactor some types into struct+extensions
* Revise Slice documentation
* Fix test cases for adoption of conditional conformances.
* [RangeReplaceableCollection] Eliminate unnecessary slicing subscript operator.
* Add -enable-experimental-conditional-conformances to test.
* Gruesome workaround for crasher in MutableSlice tests
See doc comments on MutableSlice for more information about what it is.
MutableSlice was one of the reasons to clarify and tighten index
invalidation rules. After that change, existing MinimalCollection
test types were performing checks that are too strict according to the
model. Existing algorithms and collections could provide them, but not
MutableSlice. This commit updates MinimalCollection types to perform
index invalidation checks that correspond to new rules.
Part of rdar://20722366. This commit adds the type, but does not wire
it up completely yet.
Swift SVN r30839
Eliminates _CollectionDefaultsType and _CollectionGeneratorDefaultsType
and creates sanity that should allow us to Protocol Extension-ize the
lazy operations, which have been blocked on inscrutable errors due in
part to the existing complexity.
Note: names beginning with "_prext_" are intended to be public after API
review and removal of the "_prext_" prefix.
Swift SVN r29689
This commit adds a minimally working Slice type and minimal tests. Even
though it might seem logical how the new protocol requirements are
injected in the CollectionType hierarchy, it is very fragile and
required many attempts to get the typechecker to finally accept it.
Because I want to ensure that the type checker does not regress, I'm
commiting a patch that does not do much yet.
Swift SVN r27665
This commit adds a minimally working Slice type and minimal tests. Even
though it might seem logical how the new protocol requirements are
injected in the CollectionType hierarchy, it is very fragile and
required many attempts to get the typechecker to finally accept it.
Because I want to ensure that the type checker does not regress, I'm
commiting a patch that does not do much yet.
Swift SVN r27617
