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-rw-r--r--tests/neg/EqualityStrawman2.scala96
1 files changed, 0 insertions, 96 deletions
diff --git a/tests/neg/EqualityStrawman2.scala b/tests/neg/EqualityStrawman2.scala
deleted file mode 100644
index f71c7d3d7..000000000
--- a/tests/neg/EqualityStrawman2.scala
+++ /dev/null
@@ -1,96 +0,0 @@
-object equality {
-
- trait Eq[-T, -U]
- object Eq extends Eq[Any, Any]
-
- implicit class EqualsDeco[T](val x: T) extends AnyVal {
- def ===[U] (y: U)(implicit ce: Eq[T, U]) = x.equals(y)
- }
-
- type EqEq[T] = Eq[T, T]
-
- trait EqClass
-
- implicit def eqAny: Eq[Any, Any] = Eq
-
- implicit def mixedEq1 : Eq[Any, EqClass] = Eq
- implicit def mixedEq1alt: Eq[Any, EqClass] = Eq
- implicit def mixedEq2 : Eq[EqClass, Any] = Eq
- implicit def mixedEq2alt: Eq[EqClass, Any] = Eq
-
-// implicit def eqEq[U, T <: U with EqClass[U]]: Eq[T, T] = Eq
-
- case class Str(str: String) extends EqClass
- case class Num(x: Int) extends EqClass
-
- case class Other(x: Int)
-
- trait Option[+T] extends EqClass
- case class Some[+T](x: T) extends Option[T]
- case object None extends Option[Nothing]
-
- implicit def eqStr: Eq[Str, Str] = Eq
- implicit def eqNum: Eq[Num, Num] = Eq
- implicit def eqOption[T, U](implicit ce: Eq[T, U]): Eq[Option[T], Option[U]] = Eq
-
- def main(args: Array[String]): Unit = {
- val x = Str("abc")
- (Some(x): Option[Str]) === (None: Option[Str])
-
- x === x
-
- val n = Num(2)
- val m = Num(3)
- n === m
-
- Other(1) === Other(2)
-
- (Some(x) === None)//(eqOption)
- (Some(x) === Some(Str("")))(eqOption)
- val z: Option[Str] = Some(Str("abc"))
- z === Some(x)
- z === None
- Some(x) === z
- None === z
-/*
- Other(3) === null
- Str("x") === null
- null === Other(3)
- null === Str("x")
- null === null*/
-
- class Fruit extends EqClass
- class Apple extends Fruit
- class Pear extends Fruit
- implicit def eqFruit: Eq[Fruit, Fruit] = Eq
-
- Some(new Apple) === Some(new Pear)
-
-
- def ddistinct[T: EqEq](xs: List[T]): List[T] = xs match {
- case Nil => Nil
- case x :: xs => x :: xs.filterNot(x === _)
- }
-
- ddistinct(List(z, z, z))
-
- n match {
- case None =>
- }
-
- Some(new Apple) === Some(Str("xx")) // error
- x === n // error
- n === x // error
- x === Other(1) // error
- Other(2) === x // error
- z === Some(n) // error
- z === n // error
- Some(n) === z // error
- n === z // error
- Other(1) === z // error
- z === Other(1) // error
- ddistinct(List(z, n)) // error
-
-
- }
-}