Ensures children are correctly handled when not varargs (#721)

Co-authored-by: Naden <naden@harana.com>

.github/workflows/sbt.yml

@@ -15,7 +15,7 @@ jobs:
       fail-fast: false
       matrix:
         os: [ubuntu-latest, windows-latest]
-        scalajs: ["1.9.0"]
+        scalajs: ["1.16.0"]
         es2015_enabled: ["false", "true"]
     steps:
       - name: Configure git to disable Windows line feeds

build.sbt

@@ -8,13 +8,13 @@ addCommandAlias(
   "compile:scalafix --check; test:scalafix --check; compile:scalafmtCheck; test:scalafmtCheck; scalafmtSbtCheck"
 )
 
-val scala212 = "2.12.17"
-val scala213 = "2.13.10"
-val scala3   = "3.2.2"
+val scala212 = "2.12.19"
+val scala213 = "2.13.14"
+val scala3   = "3.3.3"
 
 ThisBuild / scalaVersion := scala213
 ThisBuild / semanticdbEnabled := true
-ThisBuild / semanticdbVersion := "4.7.6"
+ThisBuild / semanticdbVersion := "4.9.9"
 
 ThisBuild / tpolecatDefaultOptionsMode := DevMode
 
@@ -46,6 +46,7 @@ addCommandAlias(
 
 lazy val crossScalaSettings = Seq(
   crossScalaVersions := Seq(scala212, scala213, scala3),
+  scalacOptions += "-Wconf:cat=unused-nowarn:s",
   Compile / unmanagedSourceDirectories ++= {
     val sourceDir = (Compile / sourceDirectory).value
     CrossVersion.partialVersion(scalaVersion.value) match {
@@ -210,7 +211,7 @@ lazy val docs =
   project.settings(librarySettings, macroAnnotationSettings).dependsOn(web, hot, docsMacros, history)
 
 ThisBuild / updateIntellij := {}
-val intelliJVersion = "231.8109.175" // 2023.1
+val intelliJVersion = "242.20224.300" // 2023.2
 
 lazy val coreIntellijSupport = project.settings(
   org.jetbrains.sbtidea.Keys.buildSettings :+ (

core/src/main/scala-2/slinky/core/annotations/react.scala

@@ -64,7 +64,19 @@ object ReactMacrosImpl {
               q"this.apply(Props.apply[..$tparams](...$applyValues))"
           }
 
-          q"""def apply[..$tparams](...$paramssWithoutChildren)(${childrenParam.get}): _root_.slinky.core.KeyAndRefAddingStage[Def] =
+          val children = {
+            val tpe = childrenParam.get.tpe
+            if (tpe != null && (tpe =:= typeOf[Seq[_root_.slinky.core.facade.ReactElement]] ||
+                tpe =:= typeOf[List[_root_.slinky.core.facade.ReactElement]] ||
+                (tpe.typeSymbol == definitions.RepeatedParamClass &&
+                tpe.typeArgs.headOption.exists(_ =:= typeOf[_root_.slinky.core.facade.ReactElement])))) {
+              q"${childrenParam.get.name}: _root_.slinky.core.facade.ReactElement_*"
+            } else {
+              q"${childrenParam.get}"
+            }
+          }
+
+          q"""def apply[..$tparams](...$paramssWithoutChildren)($children): _root_.slinky.core.KeyAndRefAddingStage[Def] =
                 $body"""
         } else {
           q"""def apply[..$tparams](...$paramssWithoutChildren): _root_.slinky.core.KeyAndRefAddingStage[Def] =