scala3 feature examples - macros - inline def / published by https://github.com/dacr/code-examples-manager #4dc9d4a2-bd4a-4f02-abea-29412c842854/8b6d884de652ace920daab6fba40f74acddd149e

scala3-feature-macro-2-inline-def.scala

// summary : scala3 feature examples - macros - inline def
// 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 : 4dc9d4a2-bd4a-4f02-abea-29412c842854
// created-on : 2024-03-17T08:18:10+01:00
// managed-by : https://github.com/dacr/code-examples-manager
// run-with : scala-cli $file

// Inspired from https://docs.scala-lang.org/scala3/guides/macros/inline.html

//> using scala "3.4.2"

inline def logged[T](level: String, message: => String)(inline op: T): T = {
  println(s"[$level]Computing $message")
  val start = System.currentTimeMillis()
  val res = op
  val duration = System.currentTimeMillis() - start
  println(s"[$level]Result of $message: $res in ${duration}ms")
  res
}

@main def go() = {
  logged("INFO", "how much time"){
    1+2
  }
}