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not support BinaryOperator ??? #10243

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scabug opened this issue Mar 21, 2017 · 3 comments
Closed

not support BinaryOperator ??? #10243

scabug opened this issue Mar 21, 2017 · 3 comments

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@scabug
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scabug commented Mar 21, 2017

can compile:
def combiner: BiFunction[Int, Int, Int] = (one: Int, other: Int) => one + other

can not compile:
def combiner: BinaryOperator[Int] = (one: Int, other: Int) => one + other
@scabug
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scabug commented Mar 21, 2017

Imported From: https://issues.scala-lang.org/browse/SI-10243?orig=1
Reporter: Hank Lu (hank.whu)
Affected Versions: 2.12.1

@scabug
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scabug commented Mar 21, 2017

@ghik said:
Both of these work just fine in Scala 2.12.1

Welcome to Scala 2.12.1 (Java HotSpot(TM) 64-Bit Server VM, Java 1.8.0_121).
Type in expressions for evaluation. Or try :help.

scala> import java.util.function._
import java.util.function._

scala> def combiner: BinaryOperator[Int] = (one: Int, other: Int) => one + other
combiner: java.util.function.BinaryOperator[Int]

scala> def combiner: BiFunction[Int, Int, Int] = (one: Int, other: Int) => one + other
combiner: java.util.function.BiFunction[Int,Int,Int]

@scabug scabug closed this as completed Mar 21, 2017
@scabug
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scabug commented Mar 21, 2017

@adriaanm said:
Thanks, Roman! Hank, let us know if you're still experiencing this issue, but please provide a full reproduction.

@scabug scabug added the needinfo label Apr 7, 2017
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