Since these APIs operate on unsafes we consider them unsafe by default.
This PR adds APINotes to override these defaults as these APIs will not
touch the underlying buffer. This should slightly reduce the number of
`unsafe`s in user code.
rdar://159839254
A first step towards creating safe overloads for C++ APIs using span
(rdar://139074571).
Note that we need to mark span as owned because it the libc++
implementation was mistakenly recognized as owned and might now rely on
span methods like `data` being renamed as `__dataUnsafe`. We will change
it under a new interop version. But for the time being, we want
consistent behavior across stdlib versions.
This removes a special case in the compiler for these types, and applies the `import_owned` attribute to all instantiations of `vector` and `basic_string` via API Notes.
This adds an `std.apinotes` file that is installed into `lib/swift/apinotes` along with existing Darwin apinotes. This new file is installed on all platforms. It replaces a few special cases in the compiler for `cmath` and `cstring` functions.
This does not require the upcoming APINotes support for namespaces, however, this does require https://github.com/apple/llvm-project/pull/7309.
rdar://107572302
