Migrate parts of the stdlib to UnsafeRawPointer. #3792
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@swift-ci Please smoke test. |
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@swift-ci Please smoke test and merge. |
…ray. In order to conform to the memory model.
In order to conform to the memory model.
To obey the memory model.
To obey the memory model.
This is another necessary step in introducing changes for SE-0107: UnsafeRawPointer. UnsafeRawPointer is great for bytewise pointer operations. OpaquePointer goes away. The _RawByte type goes away. StringBuffer always binds memory to the correct CodeUnit when allocating memory. Before accessing the string, a dynamic element width check allows us to assume the bound memory type. Generic entry points like atomicCompareExchange no longer handle both kinds of pointers. Normally that's good because you should not be using generics in that case, just upcast to raw pointer. However, with pointers-to-pointers you can't do that.
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@swift-ci Please smoke test and merge. |
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Required for SE-0107: UnsafeRawPointer.
This is necessary to implement the proposed UnsafePointer initializers.
Lots of changes to StringCore here.