This allows annotating fields of C/C++ structs using API Notes.
Previously API Notes supported Objective-C properties, but not fields.
rdar://131548377
This allows adding a Clang attribute
`swift_attr("conforms_to:ModuleName.ProtocolName")` to C++ structs via
API Notes.
The Swift compiler respects this attribute when importing C++ types into
Swift by automatically declaring the C++ type as a conforming type to
the given Swift protocol.
rdar://131388824
This adds support for adding Clang attributes to C++ methods declared
within C++ records by using API Notes.
For instance:
```
Tags:
- Name: IntWrapper
Methods:
- Name: getIncremented
Availability: none
```
This is the first instance of something within a C++ record being
annotated with API Notes, so it adds the necessary infra to make a C++
record an "API Notes context".
Notably this does not add support for nested C++ tags. That will be
added in a follow-up patch.
rdar://131387880
We were storing extraneous data for certain Objective-C/C++ entities.
Specifically, for declarations that can be nested in another context
(such as functions) we were storing the kind of the parent context in
addition to its ID. The ID is always sufficient.
This removes the logically incorrect usages of `ContextTableKey` that
don't actually describe a context, but rather describe a single
declaration. This introduces `SingleDeclTableKey` to store that kind of
entities in a more compact and reasonable way.
API Notes now support in C++. In preparation for supporting C++ methods
in API Notes, this change renames the remaining usages of
`ObjCContextABC` into `ContextABC` to make it clear that those contexts
might actually be C++, not Objective-C.
This is NFC-ish.
Certain C++ types, such as `std::chrono::tzdb` in libstdc++, are
non-copyable, but don't explicitly delete their copy constructor.
Instead, they trigger template instantiation errors when trying to call
their implicit copy constructor. The Swift compiler inserts implicit
copies of value types in some cases, which trigger compiler errors for
such types.
This adds a Clang API Notes attribute that allows annotating C++ types
as non-copyable in Swift. This lets the Swift compiler know that it
should not try to instantiate the implicit copy constructor for a C++
struct.
rdar://127049438
