Port Capture-checked Scala 2 collections (#23769)

New final class `collection.immutable.LazyListIterable[A]`, implements
Iterable and IterableOps. `LazyList` and `Stream` are not
capture-checked. Note added to `LazyList`.

---------

Co-authored-by: Yichen Xu <[email protected]>

Author: natsukagami

library-js/src/scala/Array.scala

@@ -12,6 +12,8 @@
 
 package scala
 
+import language.experimental.captureChecking
+
 //import scala.collection.generic._
 import scala.collection.{Factory, immutable, mutable}
 import mutable.ArrayBuilder
@@ -61,7 +63,7 @@ object Array {
   implicit def toFactory[A : ClassTag](dummy: Array.type): Factory[A, Array[A]] = new ArrayFactory(dummy)
   @SerialVersionUID(3L)
   private class ArrayFactory[A : ClassTag](dummy: Array.type) extends Factory[A, Array[A]] with Serializable {
-    def fromSpecific(it: IterableOnce[A]): Array[A] = Array.from[A](it)
+    def fromSpecific(it: IterableOnce[A]^): Array[A] = Array.from[A](it)
     def newBuilder: mutable.Builder[A, Array[A]] = Array.newBuilder[A]
   }
 
@@ -70,7 +72,7 @@ object Array {
    */
   def newBuilder[T](implicit t: ClassTag[T]): ArrayBuilder[T] = ArrayBuilder.make[T](using t)
 
-  def from[A : ClassTag](it: IterableOnce[A]): Array[A] = {
+  def from[A: ClassTag](it: IterableOnce[A]^): Array[A] = {
     val n = it.knownSize
     if (n > -1) {
       val elements = new Array[A](n)
@@ -656,7 +658,7 @@ object Array {
  *  @define collectExample
  *  @define undefinedorder
  */
-final class Array[T](_length: Int) extends java.io.Serializable with java.lang.Cloneable {
+final class Array[T](_length: Int) extends java.io.Serializable with java.lang.Cloneable { self =>
 
   /** The length of the array */
   def length: Int = throw new Error()

library/src/scala/Array.scala

@@ -13,6 +13,7 @@
 package scala
 
 import scala.language.`2.13`
+import language.experimental.captureChecking
 
 //import scala.collection.generic._
 import scala.collection.{Factory, immutable, mutable}
@@ -49,7 +50,7 @@ object Array {
   implicit def toFactory[A : ClassTag](dummy: Array.type): Factory[A, Array[A]] = new ArrayFactory(dummy)
   @SerialVersionUID(3L)
   private class ArrayFactory[A : ClassTag](dummy: Array.type) extends Factory[A, Array[A]] with Serializable {
-    def fromSpecific(it: IterableOnce[A]): Array[A] = Array.from[A](it)
+    def fromSpecific(it: IterableOnce[A]^): Array[A] = Array.from[A](it)
     def newBuilder: mutable.Builder[A, Array[A]] = Array.newBuilder[A]
   }
 
@@ -71,7 +72,7 @@ object Array {
    *  @param  it the iterable collection
    *  @return    an array consisting of elements of the iterable collection
    */
-  def from[A : ClassTag](it: IterableOnce[A]): Array[A] = it match {
+  def from[A : ClassTag](it: IterableOnce[A]^): Array[A] = it match {
     case it: Iterable[A] => it.toArray[A]
     case _ => it.iterator.toArray[A]
   }
@@ -659,7 +660,7 @@ object Array {
  *  @define collectExample
  *  @define undefinedorder
  */
-final class Array[T](_length: Int) extends java.io.Serializable with java.lang.Cloneable {
+final class Array[T](_length: Int) extends java.io.Serializable with java.lang.Cloneable { self: Array[T] =>
 
   /** The length of the array */
   def length: Int = throw new Error()

library/src/scala/Boolean.scala

@@ -114,7 +114,7 @@ final abstract class Boolean private extends AnyVal {
 
 object Boolean extends AnyValCompanion {
 
-  /** Transform a value type into a boxed reference type.
+  /** Transforms a value type into a boxed reference type.
    *
    *  Runtime implementation determined by `scala.runtime.BoxesRunTime.boxToBoolean`. See [[https://github.com/scala/scala src/library/scala/runtime/BoxesRunTime.java]].
    *
@@ -123,7 +123,7 @@ object Boolean extends AnyValCompanion {
    */
   def box(x: Boolean): java.lang.Boolean = ???
 
-  /** Transform a boxed type into a value type.  Note that this
+  /** Transforms a boxed type into a value type.  Note that this
    *  method is not typesafe: it accepts any Object, but will throw
    *  an exception if the argument is not a java.lang.Boolean.
    *

library/src/scala/Byte.scala

@@ -455,7 +455,7 @@ object Byte extends AnyValCompanion {
   /** The largest value representable as a Byte. */
   final val MaxValue = java.lang.Byte.MAX_VALUE
 
-  /** Transform a value type into a boxed reference type.
+  /** Transforms a value type into a boxed reference type.
    *
    *  Runtime implementation determined by `scala.runtime.BoxesRunTime.boxToByte`. See [[https://github.com/scala/scala src/library/scala/runtime/BoxesRunTime.java]].
    *
@@ -464,7 +464,7 @@ object Byte extends AnyValCompanion {
    */
   def box(x: Byte): java.lang.Byte = ???
 
-  /** Transform a boxed type into a value type.  Note that this
+  /** Transforms a boxed type into a value type.  Note that this
    *  method is not typesafe: it accepts any Object, but will throw
    *  an exception if the argument is not a java.lang.Byte.
    *

library/src/scala/Char.scala

@@ -455,7 +455,7 @@ object Char extends AnyValCompanion {
   /** The largest value representable as a Char. */
   final val MaxValue = java.lang.Character.MAX_VALUE
 
-  /** Transform a value type into a boxed reference type.
+  /** Transforms a value type into a boxed reference type.
    *
    *  Runtime implementation determined by `scala.runtime.BoxesRunTime.boxToCharacter`. See [[https://github.com/scala/scala src/library/scala/runtime/BoxesRunTime.java]].
    *
@@ -464,7 +464,7 @@ object Char extends AnyValCompanion {
    */
   def box(x: Char): java.lang.Character = ???
 
-  /** Transform a boxed type into a value type.  Note that this
+  /** Transforms a boxed type into a value type.  Note that this
    *  method is not typesafe: it accepts any Object, but will throw
    *  an exception if the argument is not a java.lang.Character.
    *

library/src/scala/Double.scala

@@ -230,7 +230,7 @@ object Double extends AnyValCompanion {
   /** The largest finite positive number representable as a Double. */
   final val MaxValue = java.lang.Double.MAX_VALUE
 
-  /** Transform a value type into a boxed reference type.
+  /** Transforms a value type into a boxed reference type.
    *
    *  Runtime implementation determined by `scala.runtime.BoxesRunTime.boxToDouble`. See [[https://github.com/scala/scala src/library/scala/runtime/BoxesRunTime.java]].
    *
@@ -239,7 +239,7 @@ object Double extends AnyValCompanion {
    */
   def box(x: Double): java.lang.Double = ???
 
-  /** Transform a boxed type into a value type.  Note that this
+  /** Transforms a boxed type into a value type.  Note that this
    *  method is not typesafe: it accepts any Object, but will throw
    *  an exception if the argument is not a java.lang.Double.
    *

library/src/scala/Float.scala

@@ -230,7 +230,7 @@ object Float extends AnyValCompanion {
   /** The largest finite positive number representable as a Float. */
   final val MaxValue = java.lang.Float.MAX_VALUE
 
-  /** Transform a value type into a boxed reference type.
+  /** Transforms a value type into a boxed reference type.
    *
    *  Runtime implementation determined by `scala.runtime.BoxesRunTime.boxToFloat`. See [[https://github.com/scala/scala src/library/scala/runtime/BoxesRunTime.java]].
    *
@@ -239,7 +239,7 @@ object Float extends AnyValCompanion {
    */
   def box(x: Float): java.lang.Float = ???
 
-  /** Transform a boxed type into a value type.  Note that this
+  /** Transforms a boxed type into a value type.  Note that this
    *  method is not typesafe: it accepts any Object, but will throw
    *  an exception if the argument is not a java.lang.Float.
    *

library/src/scala/Function0.scala

@@ -11,7 +11,7 @@
  */
 
 // GENERATED CODE: DO NOT EDIT.
-// genprod generated these sources at: 2022-01-17T20:47:12.170348200Z
+// genprod generated these sources at: 2025-08-11T16:44:44.712777821Z
 
 package scala
 
@@ -36,7 +36,7 @@ import scala.language.`2.13`
  * }
  *  }}}
  */
-trait Function0[@specialized(Specializable.Primitives) +R] extends AnyRef { self =>
+trait Function0[@specialized(Specializable.Primitives) +R] extends AnyRef {
   /** Apply the body of this function to the arguments.
    *  @return   the result of function application.
    */

library/src/scala/Function1.scala

@@ -65,7 +65,7 @@ object Function1 {
  *  is that the latter can specify inputs which it will not handle.
  */
 @annotation.implicitNotFound(msg = "No implicit view available from ${T1} => ${R}.")
-trait Function1[@specialized(Specializable.Arg) -T1, @specialized(Specializable.Return) +R] extends AnyRef { self =>
+trait Function1[@specialized(Specializable.Arg) -T1, @specialized(Specializable.Return) +R] extends AnyRef {
   /** Apply the body of this function to the argument.
    *  @return   the result of function application.
    */

library/src/scala/Function10.scala

@@ -19,7 +19,7 @@ import scala.language.`2.13`
 /** A function of 10 parameters.
  *
  */
-trait Function10[-T1, -T2, -T3, -T4, -T5, -T6, -T7, -T8, -T9, -T10, +R] extends AnyRef { self =>
+trait Function10[-T1, -T2, -T3, -T4, -T5, -T6, -T7, -T8, -T9, -T10, +R] extends AnyRef {
   /** Apply the body of this function to the arguments.
    *  @return   the result of function application.
    */
@@ -29,7 +29,7 @@ trait Function10[-T1, -T2, -T3, -T4, -T5, -T6, -T7, -T8, -T9, -T10, +R] extends
    *  @return   a function `f` such that `f(x1)(x2)(x3)(x4)(x5)(x6)(x7)(x8)(x9)(x10) == apply(x1, x2, x3, x4, x5, x6, x7, x8, x9, x10)`
    */
   @annotation.unspecialized def curried: T1 => T2 => T3 => T4 => T5 => T6 => T7 => T8 => T9 => T10 => R = {
-    (x1: T1) => ((x2: T2, x3: T3, x4: T4, x5: T5, x6: T6, x7: T7, x8: T8, x9: T9, x10: T10) => self.apply(x1, x2, x3, x4, x5, x6, x7, x8, x9, x10)).curried
+    (x1: T1) => ((x2: T2, x3: T3, x4: T4, x5: T5, x6: T6, x7: T7, x8: T8, x9: T9, x10: T10) => this.apply(x1, x2, x3, x4, x5, x6, x7, x8, x9, x10)).curried
   }
   /** Creates a tupled version of this function: instead of 10 arguments,
    *  it accepts a single [[scala.Tuple10]] argument.