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scala3 feature examples - macros - inline sizeOf / published by https://github.com/dacr/code-examples-manager #ec61ceb3-1593-4112-9aa9-6ba76fac74cf/43930f5c1bd904cf66423127a010221a2fe2222c
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| // summary : scala3 feature examples - macros - inline sizeOf | |
| // keywords : scala3, tutorial, macros, inline, meta-programming, @testable | |
| // publish : gist | |
| // authors : David Crosson | |
| // license : Apache NON-AI License Version 2.0 (https://raw.githubusercontent.com/non-ai-licenses/non-ai-licenses/main/NON-AI-APACHE2) | |
| // id : ec61ceb3-1593-4112-9aa9-6ba76fac74cf | |
| // created-on : 2021-06-20T12:33:40+02:00 | |
| // managed-by : https://github.com/dacr/code-examples-manager | |
| // run-with : scala-cli $file | |
| // Inspired from https://www.youtube.com/watch?v=OPBuCQRgyV4&t=1283s from Josh Suereth | |
| //> using scala "3.4.2" | |
| import scala.compiletime.erasedValue | |
| inline def sizeOf[T]: Int = | |
| inline erasedValue[T] match | |
| case _:Byte => 1 | |
| case _:Short => 2 | |
| case _:Int => 4 | |
| case _:Long => 8 | |
| case _:Float => 4 | |
| case _:Double => 8 | |
| @main def go() = | |
| println(s"sizeOf[Int] = ${sizeOf[Int]}") |
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