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ax:A#X = a.x
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| Welcome to Scala 2.12.8 (Java HotSpot(TM) 64-Bit Server VM, Java 1.8.0_201). | |
| Type in expressions for evaluation. Or try :help. | |
| scala> trait A {val x:AnyRef = null;type X = x.type} | |
| defined trait A | |
| scala> val a = new A{} | |
| a: A = $anon$1@36417a54 | |
| scala> val ax:a.type#X = a.x | |
| ax: a.X = null | |
| scala> val ax2:A#X = a.x | |
| ax2: _1.x.type forSome { val _1: A } = null |
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| //dotr -version | |
| //Starting dotty REPL... | |
| //Dotty compiler version 0.12.0-RC1 -- Copyright 2002-2019, LAMP/EPFL | |
| Starting dotty REPL... | |
| scala> trait A {val x:AnyRef = null;type X = x.type} | |
| // defined trait A | |
| scala> val a = new A{} | |
| val a: A = anon$1@3050ac2f | |
| scala> val ax:a.type#X = a.x | |
| val ax: a.X = null | |
| scala> val ax2:A#X = a.x | |
| 1 |val ax2:A#X = a.x | |
| | ^^^ | |
| | Found: AnyRef(a.x) | |
| | Required: A#X |
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