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scala3 feature examples - explicit nulls / published by https://github.com/dacr/code-examples-manager #d63219ff-c8cf-46f3-a927-d311db37ab35/1e5eff6e0441a9b04eb26930f5b9d9c2b33ac82
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| // summary : scala3 feature examples - explicit nulls | |
| // keywords : scala3, tutorial | |
| // publish : gist | |
| // authors : David Crosson | |
| // license : Apache License Version 2.0 (https://www.apache.org/licenses/LICENSE-2.0.txt) | |
| // id : d63219ff-c8cf-46f3-a927-d311db37ab35 | |
| // created-on : 2021-04-21T11:45:13+02:00 | |
| // managed-by : https://github.com/dacr/code-examples-manager | |
| // run-with : scala-cli $file | |
| //// run-with : scala-cli --scalac-option -Yexplicit-nulls $file | |
| //> using scala "3.4.2" | |
| // using options -Yexplicit-nulls | |
| @main def go():Unit = { | |
| val nullableResult : String | Null = java.lang.System.getenv("PATH") | |
| if (nullableResult != null) { | |
| val result: String = nullableResult // safe because of the previous test :) | |
| println(result) | |
| } | |
| val aresult:String = nullableResult // FAIL when the explicit feature is enabled (-Yexplicit-nulls) | |
| println(aresult) | |
| } |
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