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liblit merged 1 commit into from
Sep 17, 2026
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Deprecate an unused implementation of bit sets #2056

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13 changes: 13 additions & 0 deletions RELEASE-NOTES.md
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Expand Up @@ -84,6 +84,19 @@ outside WALA, please [let the WALA maintainers
know](https://github.com/wala/WALA/issues/new) so that we don't remove them in a
future release.

#### `com.ibm.wala.util.intset.BitSet` deprecated

`com.ibm.wala.util.intset.BitSet<T>` is now deprecated, marked
`@Deprecated(since = "1.9.0")`. The class has not been used anywhere within
WALA since WALA moved from Subversion to Git in April 2012, and we do not
believe it is used anywhere outside WALA. Use an `IntSet`
type such as `MutableSparseIntSet` or `BitVectorIntSet`, or the read-only
`OrdinalSet<T>`, together with an `OrdinalSetMapping<T>` instead.

**Effect for third-party consumers:** if you do use `BitSet<T>` outside WALA,
please [let the WALA maintainers know](https://github.com/wala/WALA/issues/new)
so that we don't remove it in a future release.

#### Analysis scope files may reference classes and sources packaged in JARs

In an analysis scope file, `classFile` and `sourceFile` entries previously
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8 changes: 7 additions & 1 deletion util/src/main/java/com/ibm/wala/util/intset/BitSet.java
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Expand Up @@ -13,7 +13,13 @@
import com.ibm.wala.util.debug.Assertions;
import java.util.Iterator;

/** A bit set is a set of elements, each of which corresponds to a unique integer from [0,MAX]. */
/**
* A bit set is a set of elements, each of which corresponds to a unique integer from [0,MAX].
*
* @deprecated Use an {@link IntSet} such as {@link MutableSparseIntSet} or {@link BitVectorIntSet}
* together with an {@link OrdinalSetMapping} instead. This class has no known use within WALA.
*/
@Deprecated(since = "1.9.0")
public final class BitSet<T> {

/** The backing bit vector that determines set membership. */
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