The `DebugDescription` macro has been accepted. Additionally, the `DebugDescriptionMacro` feature was not providing conditional declaration as I originally intended. References to the feature are not needed and can be removed.
(cherry-picked from #77738)
Find all the usages of `--enable-experimental-feature` or
`--enable-upcoming-feature` in the tests and replace some of the
`REQUIRES: asserts` to use `REQUIRES: swift-feature-Foo` instead, which
should correctly apply to depending on the asserts/noasserts mode of the
toolchain for each feature.
Remove some comments that talked about enabling asserts since they don't
apply anymore (but I might had miss some).
All this was done with an automated script, so some formatting weirdness
might happen, but I hope I fixed most of those.
There might be some tests that were `REQUIRES: asserts` that might run
in `noasserts` toolchains now. This will normally be because their
feature went from experimental to upcoming/base and the tests were not
updated.
On windows (PECOFF), the `static let` properties produced by `DebugDescriptionMacro`
are not constants, and as a result the `@_section` macro cannot be applied. The error
message is:
> global variable must be a compile-time constant to use `@_section` attribute
Until this issue is addressed, DebugDescriptionMacro is disabled for windows targets.
The data emitted by `DebugDescriptionMacro` is constant. For that reason, it was placed
in `__DATA_CONST`. However, this causes a problem with the linker, which emits an error
if the `__DATA_CONST` segment is _not_ marked `SG_READ_ONLY`.
After discussion, it was pointed out that if the constant data has no fixups, then it
can and should be in the the `__TEXT` segment. The `__DATA_CONST` segment is for data
that is essentially constant but contains dyld fixups.
Implementation of the DebugDescription macro pitched on the forums:
https://forums.swift.org/t/pitch-debug-description-macro/67711. In this initial commit,
the macro is named `_DebugDescription` to indicate it's internal use at this time,
pending Swift Evolution.
rdar://115180949
