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Add sequence higher-order functions to Java API (#8226)

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* Initial plan

* Add four sequence operations to Java API (SeqMap, SeqMapi, SeqFoldl, SeqFoldli)

Co-authored-by: NikolajBjorner <3085284+NikolajBjorner@users.noreply.github.com>

* Fix checkContextMatch call and add test for sequence operations

Co-authored-by: NikolajBjorner <3085284+NikolajBjorner@users.noreply.github.com>

* Add 4-parameter checkContextMatch overload for consistency

Co-authored-by: NikolajBjorner <3085284+NikolajBjorner@users.noreply.github.com>

---------

Co-authored-by: copilot-swe-agent[bot] <198982749+Copilot@users.noreply.github.com>
Co-authored-by: NikolajBjorner <3085284+NikolajBjorner@users.noreply.github.com>
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Copilot 2026-01-17 13:02:54 -08:00 • committed by GitHub
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commit ecea5e2b4e
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48
src/api/java/Context.java
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@ -2235,6 +2235,46 @@ public class Context implements AutoCloseable {
return (IntExpr)Expr.create(this, Native.mkSeqLastIndex(nCtx(), s.getNativeObject(), substr.getNativeObject()));
}
/**
* Map function f over sequence s.
* Returns a new sequence where f is applied to each element of s.
*/
public final <R extends Sort> SeqExpr<R> mkSeqMap(Expr<?> f, Expr<SeqSort<R>> s)
{
checkContextMatch(f, s);
return (SeqExpr<R>) Expr.create(this, Native.mkSeqMap(nCtx(), f.getNativeObject(), s.getNativeObject()));
}
/**
* Map function f over sequence s starting at index i.
* Returns a new sequence where f is applied to each element of s along with its index starting from i.
*/
public final <R extends Sort> SeqExpr<R> mkSeqMapi(Expr<?> f, Expr<IntSort> i, Expr<SeqSort<R>> s)
{
checkContextMatch(f, i, s);
return (SeqExpr<R>) Expr.create(this, Native.mkSeqMapi(nCtx(), f.getNativeObject(), i.getNativeObject(), s.getNativeObject()));
}
/**
* Left fold of function f over sequence s with accumulator a.
* Applies f to accumulate values from left to right over the sequence.
*/
public final <R extends Sort, A extends Sort> Expr<A> mkSeqFoldl(Expr<?> f, Expr<A> a, Expr<SeqSort<R>> s)
{
checkContextMatch(f, a, s);
return (Expr<A>) Expr.create(this, Native.mkSeqFoldl(nCtx(), f.getNativeObject(), a.getNativeObject(), s.getNativeObject()));
}
/**
* Left fold of function f over sequence s with accumulator a starting at index i.
* Applies f to accumulate values from left to right over the sequence, tracking the index starting from i.
*/
public final <R extends Sort, A extends Sort> Expr<A> mkSeqFoldli(Expr<?> f, Expr<IntSort> i, Expr<A> a, Expr<SeqSort<R>> s)
{
checkContextMatch(f, i, a, s);
return (Expr<A>) Expr.create(this, Native.mkSeqFoldli(nCtx(), f.getNativeObject(), i.getNativeObject(), a.getNativeObject(), s.getNativeObject()));
}
/**
* Replace the first occurrence of src by dst in s.
*/
@ -4430,6 +4470,14 @@ public class Context implements AutoCloseable {
checkContextMatch(other3);
}
void checkContextMatch(Z3Object other1, Z3Object other2, Z3Object other3, Z3Object other4)
{
checkContextMatch(other1);
checkContextMatch(other2);
checkContextMatch(other3);
checkContextMatch(other4);
}
void checkContextMatch(Z3Object[] arr)
{
if (arr != null)