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Fix LazyList.range [ci: last-only] #10767

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Fix LazyList.range [ci: last-only] #10767

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6de2bf8
Override LazyList.range
BalmungSan Apr 30, 2024
91088b5
Test LazyList.range
BalmungSan Apr 30, 2024
bd3db0d
Better LazyList.range impl
BalmungSan Apr 30, 2024
f7745a4
Move LazyList.range implementation closer to other overrides
BalmungSan Apr 30, 2024
2028dae
Ensure lazyness of `Integral[A].one` for overrided `range` implementa…
BalmungSan Apr 30, 2024
fbc2623
Ensure step can't be zero
BalmungSan Apr 30, 2024
1ac4f64
Allow reverse LazyList.range
BalmungSan Apr 30, 2024
b4eb90a
Make the lazyRangeAllowsMoreThanIntMaxValue test run fast
BalmungSan Apr 30, 2024
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Override LazyList.range
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@BalmungSan
BalmungSan committed Apr 30, 2024
commit 6de2bf8f9d78df9db95fac1e49dec38105176749
7 changes: 7 additions & 0 deletions src/library/scala/collection/immutable/LazyList.scala
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Expand Up @@ -968,6 +968,13 @@ final class LazyList[+A] private(private[this] var lazyState: () => LazyList.Sta
*/
@SerialVersionUID(3L)
object LazyList extends SeqFactory[LazyList] {
// Override SeqFactory methods.
override def range[A: Integral](start: A, end: A): LazyList[A] =
range(start, end, step = Integral[A].one)

override def range[A](start: A, end: A, step: A)(implicit ev: Integral[A]): LazyList[A] =
LazyList.iterate(start)(ev.plus(_, step)).takeWhile(ev.lt(_, end))
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// Eagerly evaluate cached empty instance
private[this] val _empty = newLL(State.Empty).force

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