Also update ArrayBuffer to take advantage of it.
This change allows us to pass a word-sized enum with a native object
reference payload directly to the runtime, without switching on the enum
to unwrap the contents. Even though that unwrapping was semantically
equivalent to bit masking, it was causing fits in the optimizer.
Swift SVN r18996
not a struct wrapping an Optional.
Among other things, this means you can now pattern-match on
an IUO. It also makes it more convenient to build and destroy
them.
SILGen's type lowering should probably canonicalize one kind
of optional to the other so that we don't get silly abstraction
costs from conversion.
Swift SVN r18991
This enables testing of other growth factors, per
<rdar://problem/17230502>. See the radar for basic performance test
results confirming (to the degree practical) that 2x growth is better
than 1.5x in our current system.
Swift SVN r18990
instead of reinterpretCasting all over the place. This should make it
easier on the ARC optimizer.
Addresses <rdar://problem/17312221>
Swift SVN r18954
s/_dictionaryCheckedDownCast/_dictionaryDownCastConditional/g
s/_dictionaryBridgeFromObjectiveC/_dictionaryBridgeFromObjectiveCConditional/g
Swift SVN r18931
Will be useful in optimizing bulk array mutations such as sort()
Also stopped making UnsafeArray a generator; in general making a
collection a generator seems somewhat muddled and dangerous, especially
when it comes to adapters that may have reference semantics.
Swift SVN r18924
Sorting was a bit of a mess; we had sort functions doing in-place
mutation /and/ returing the value, and people were confused by the
asymmetry of Array's sort() method with other higher-level methods.
Fixes <rdar://problem/17185815> sort([]T, f) mutates the original array
<rdar://problem/17225190> The Array.sort() method should return a sorted array
Swift SVN r18922
We enable pattern matching against nil even if the T of an option type isn't comparable by implementing
a crazy new ~= operator. This approach would work to enable comparisons against nil as well, but I can't
make it happen without introducing ambiguities.
Swift SVN r18919
This is all goodness, and eliminates a major source of implicit conversions.
One thing this regresses on though, is that we now reject "x == nil" where
x is an option type and the element of the optional is not Equtatable. If
this is important, there are ways to enable this, but directly testing it as
a logic value is more straight-forward.
This does not include support for pattern matching against nil, that will be
a follow on patch.
Swift SVN r18918
This is an inefficient, copying implementation of
_dictionaryBridgeToObjectiveC to aid progress on wiring up dictionary
downcasting <rdar://problem/16847470>. Making this implementation
efficient is tracked by <rdar://problem/16852016>.
Swift SVN r18897
This is an inefficient, copying implementation of
_dictionaryCheckedDownCast to aid progress on wiring up dictionary
downcasting <rdar://problem/16847470>. Making this implementation
efficient is tracked by <rdar://problem/16852016>.
Swift SVN r18896
This introduces _dictionaryUpCast and _dictionaryBridgeToObjectiveC,
which will be used for upcasting for non-bridged and bridged key/value
types, respectively. _dictionaryUpCast is a horrible copying O(n)
implementation where we should be able to provide an O(1)
implementation, and _dictionaryBridgeToObjectiveC is similarly
awful. Hence, this is not for <rdar://problem/16852016>, but is merely
a stub to let us make progress on upcasting in the frontend
(<rdar://problem/17289296>).
Swift SVN r18867
Don't use spare bits on platforms that use ObjC tagged pointers when an enum payload involves a class-constrained existential, archetype, or ObjC-defined class type. If a payload is of a Swift-defined class type, we can still assume it's a real pointer and use its spare bits. Add an @unsafe_no_objc_tagged_pointer attribute that can be applied to protocols to denote that existentials bounded by that protocol can use spare bits; this is necessary to preserve the layout of bridged Array and Dictionary types, which should not be bound to tagged pointer types in practice (fingers crossed). Fixes <rdar://problem/16270219>.
Swift SVN r18781
This helps array append's performance by ~ 2x. The generic max with a variadic
argument takes at least 3 arguments, it creates a temporary array then iterates
over the array.
This is an updated version of r18764.
rdar://17140639 rdar://17073827
Swift SVN r18767
This helps array append's performance by ~ 2x. The generic max with a variadic
argument creates a temporary array then iterates over the array.
rdar://17140639 rdar://17073827
Swift SVN r18764
so I took the liberty to 'privatize' them with a leading underscore.
This also completely removes '_ArrayBody' from the public interface.
Should be NFC, apart from the public interface change.
Swift SVN r18625
-Hide vars that have a private type.
-Hide functions that have a parameter with private type or a parameter name with leading underscore.
-Minor change in StringUTF16.swift to avoid printing "func generate() -> IndexingGenerator<_StringCore>".
rdar://17027294
Swift SVN r18623
