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Add an optional language feature for Library Evolution

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Replace the one-off compiler flag for Library Evolution with an
optional language feature. This makes the
`hasFeature(LibraryEvolution)` check work in an `#if`, and is
otherwise just cleanup.

Tracked by rdar://161125572.
This commit is contained in:
Doug Gregor
2025-09-22 17:45:34 -07:00
parent 87cbe5d2a9
commit c68ef1cf71
12 changed files with 28 additions and 28 deletions
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2
include/swift/Basic/Features.def
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@@ -308,6 +308,8 @@ UPCOMING_FEATURE(ImmutableWeakCaptures, 481, 7)
/// safety.
MIGRATABLE_OPTIONAL_LANGUAGE_FEATURE(StrictMemorySafety, 458, "Strict memory safety")
OPTIONAL_LANGUAGE_FEATURE(LibraryEvolution, 0, "Library evolution")
// Experimental features
EXPERIMENTAL_FEATURE(StaticAssert, false)