When printing the public `.swiftinterface` for a `-library-level=api` module,
skip emitting `@available`, `@backDeployed`, and `@_originallyDefinedIn`
attributes that reference "SPI" platforms.
Resolves rdar://133990140.
This change introduces a new compilation target platform to the Swift compiler - visionOS.
- Changes to the compiler build infrastrucuture to support building compiler-adjacent artifacts and test suites for the new target.
- Addition of the new platform kind definition.
- Support for the new platform in language constructs such as compile-time availability annotations or runtime OS version queries.
- Utilities to read out Darwin platform SDK info containing platform mapping data.
- Utilities to support re-mapping availability annotations from iOS to visionOS (e.g. 'updateIntroducedPlatformForFallback', 'updateDeprecatedPlatformForFallback', 'updateObsoletedPlatformForFallback').
- Additional tests exercising platform-specific availability handling and availability re-mapping fallback code-path.
- Changes to existing test suite to accomodate the new platform.
Recently, unexpected binary module sharing between compilers that had
inconsistent views of the `PlatformKind` enumeration caused me to spend several
days debugging undefined behavior in the compiler. We should validate that
enumeration values decoded during deserialization are valid, and fail fast when
they are not to make debugging this kind of issue less time consuming. This
change just validates the `PlatformKind` value decoded for an `AvailableAttr`,
but more of deserialization could be updated to do similar validation.
Resolves rdar://123770273
Unavailable decl optimization is meant to optimize declarations that are
unreachable at runtime. A declaration that is marked unavailable in app
extensions (e.g. `@available(macOSApplicationExtension, unavailable)`) may be
reachable by non-extension processes so it cannot be safely optimized.
Resolves rdar://122924862
Reformatting everything now that we have `llvm` namespaces. I've
separated this from the main commit to help manage merge-conflicts and
for making it a bit easier to read the mega-patch.
This is phase-1 of switching from llvm::Optional to std::optional in the
next rebranch. llvm::Optional was removed from upstream LLVM, so we need
to migrate off rather soon. On Darwin, std::optional, and llvm::Optional
have the same layout, so we don't need to be as concerned about ABI
beyond the name mangling. `llvm::Optional` is only returned from one
function in
```
getStandardTypeSubst(StringRef TypeName,
bool allowConcurrencyManglings);
```
It's the return value, so it should not impact the mangling of the
function, and the layout is the same as `std::optional`, so it should be
mostly okay. This function doesn't appear to have users, and the ABI was
already broken 2 years ago for concurrency and no one seemed to notice
so this should be "okay".
I'm doing the migration incrementally so that folks working on main can
cherry-pick back to the release/5.9 branch. Once 5.9 is done and locked
away, then we can go through and finish the replacement. Since `None`
and `Optional` show up in contexts where they are not `llvm::None` and
`llvm::Optional`, I'm preparing the work now by going through and
removing the namespace unwrapping and making the `llvm` namespace
explicit. This should make it fairly mechanical to go through and
replace llvm::Optional with std::optional, and llvm::None with
std::nullopt. It's also a change that can be brought onto the
release/5.9 with minimal impact. This should be an NFC change.
Add a platform kind and availability attributes for macCatalyst. macCatalyst
uses iOS version numbers and inherits availability from iOS attributes unless
a macCatalyst attribute is explicitly provided.
This does several different things to improve how platforms are described in availability diagnostics:
• Mentions the platform in diagnostics for platform-specific @available(unavailable) attributes.
• Replaces “OS X” with “macOS”.
• Replaces “fooOS application extension” with “application extensions for fooOS”.
• Replaces “on fooOS” with “in fooOS”.
Fixes <rdar://problem/49963341>.
This way they can be used from other projects, like LLDB. The downside
is we now have to make sure the header is included consistently in all
the places we care about, but I think in practice that won't be a problem,
especially not with tests.
rdar://problem/22240127
Swift SVN r31173
llvm::Optional lives in "llvm/ADT/Optional.h". Like Clang, we can get
Optional in the 'swift' namespace by including "swift/Basic/LLVM.h".
We're now fully switched over to llvm::Optional!
Swift SVN r22477
This patch adds the beginning of building the type refinement context tree for
availability checking in Sema, guarded by by the
-enable-experimental-availability-checking option. This tree parallels the AST
but is much more sparse: we introduce a new TypeRefinementContext only when
needed. Each context refines the range of potential OS versions that could be
encountered at run time. For the moment, we only refine contexts for function
bodies. I will add refinement contexts for #os(...) in a later commit.
The AST is not directly connected to the TRC tree except at the SourceFile
level; when type checking, we use source locations to look up the TRC
corresponding to an AST element. For the moment, we emit a diagnostic when the
programmer references a potentially unavailable declaration. We will later
change this to treat the declaration as if it had optional type.
Swift SVN r22145
