Implicit parameters should be provided with a using clause warning since Scala 3.7

[xuwei-k]

reproduce code

build.sbt

enablePlugins(SbtTwirl)

scalaVersion := "3.7.0-RC1-bin-20250215-43f8cdb-NIGHTLY"

project/build.properties

sbt.version=1.10.7

project/plugins.sbt

addSbtPlugin("org.playframework.twirl" % "sbt-twirl" % "2.1.0-M2")

src/main/twirl/example.scala.html

@(x: Int)(implicit y: Int)

<p>hello</p>

problem

sbt compile

/src/main/twirl/example.scala.html:3:13: Implicit parameters should be provided with a `using` clause.
[warn] This code can be rewritten automatically under -rewrite -source 3.7-migration.
[warn] To disable the warning, please use the following option: 
[warn]   "-Wconf:msg=Implicit parameters should be provided with a `using` clause:s"
[warn] <p>hello</p>
[warn]             ^
[warn] one warning found

generated code

  /**/
  def apply/*1.2*/(x: Int)(implicit y: Int):play.twirl.api.HtmlFormat.Appendable = {
    _display_ {
      {


Seq[Any](format.raw/*2.1*/("""
"""),format.raw/*3.1*/("""<p>hello</p>
"""))
      }
    }
  }

  def render(x:Int,y:Int): play.twirl.api.HtmlFormat.Appendable = apply(x)(y)

  def f:((Int) => (Int) => play.twirl.api.HtmlFormat.Appendable) = (x) => (y) => apply(x)(y)

  def ref: this.type = this

expect

<   def render(x:Int,y:Int): play.twirl.api.HtmlFormat.Appendable = apply(x)(y)
---
>   def render(x:Int,y:Int): play.twirl.api.HtmlFormat.Appendable = apply(x)(using y)
29c29
<   def f:((Int) => (Int) => play.twirl.api.HtmlFormat.Appendable) = (x) => (y) => apply(x)(y)
---
>   def f:((Int) => (Int) => play.twirl.api.HtmlFormat.Appendable) = (x) => (y) => apply(x)(using y)

note

• Implicit parameters should warn at call site in >= 3.7 scala/scala3#22441

[mkurz]

Thanks for the report. We probably want to adjust the generated scala 3 code. PRs welcome 😉