Use a temporary bitset to speed up the `Sequence` variant by roughly a factor of ~4-6, and the set/set variant by a factor of ~1-4, depending on the ratio of overlapping elements.
Commit the platform definition and build script work necessary to
cross-compile for arm64_32.
arm64_32 is a variant of AARCH64 that supports an ILP32 architecture.
Old Swift and new Swift runtimes and overlays need to coexist in the same process. This means there must not be any classes which have the same ObjC runtime name in old and new, because the ObjC runtime doesn't like name collisions.
When possible without breaking source compatibility, classes were renamed in Swift, which results in a different ObjC name.
Public classes were renamed only on the ObjC side using the @_objcRuntimeName attribute.
This is similar to the work done in pull request #19295. That only renamed @objc classes. This renames all of the others, since even pure Swift classes still get an ObjC name.
rdar://problem/46646438
_modify mustn’t leave Collection storage in an inconsistent state when the code to which we’re yielding happens to throw. In practice this means that any cleanup code must happen in defer blocks before the yield.
Fix Dictionary to do just that and add tests to cover this functionality (as well as some other aspects of _modify).
- Make internal (but @inlinable)
- Limit API to what is actually supported: a single boolean value.
- Rename members:
init(native:,bits:) ⟹ init(native:,isFlagged:)
func isNativeWithClearedSpareBits() ⟹ isUnflaggedNative
var nativeInstance_noSpareBits ⟹ unflaggedNativeInstance
func isUniquelyReferenced_native_noSpareBits() ⟹ isUniquelyReferencedUnflaggedNative()
Add __consuming and __owned to Set and Dictionary members where applicable.
Ignore compiler intrinsics for casting for now — their ARC behavior is covered by unit tests that need to be updated.
