support for scala 3.3.0-RC1

.github/workflows/ci.yml

@@ -23,7 +23,7 @@ jobs:
     strategy:
       matrix:
         os: [ubuntu-latest]
-        scala: [3.2.2, 3.2.1, 2.13.10, 2.12.17]
+        scala: [3.3.0-RC1, 3.2.2, 3.2.1, 2.13.10, 2.12.17]
         java: [temurin@17]
     runs-on: ${{ matrix.os }}
     steps:
@@ -73,7 +73,7 @@ jobs:
     strategy:
       matrix:
         os: [ubuntu-latest]
-        scala: [3.2.2]
+        scala: [3.3.0-RC1]
         java: [temurin@17]
     runs-on: ${{ matrix.os }}
     steps:
@@ -101,6 +101,16 @@ jobs:
             ~/Library/Caches/Coursier/v1
           key: ${{ runner.os }}-sbt-cache-v2-${{ hashFiles('**/*.sbt') }}-${{ hashFiles('project/build.properties') }}
 
+      - name: Download target directories (3.3.0-RC1)
+        uses: actions/download-artifact@v2
+        with:
+          name: target-${{ matrix.os }}-3.3.0-RC1-${{ matrix.java }}
+
+      - name: Inflate target directories (3.3.0-RC1)
+        run: |
+          tar xf targets.tar
+          rm targets.tar
+
       - name: Download target directories (3.2.2)
         uses: actions/download-artifact@v2
         with:

build.sbt

@@ -1,7 +1,7 @@
 inThisBuild(Seq(
   organization := "com.github.ghik",
   scalaVersion := crossScalaVersions.value.head,
-  crossScalaVersions := Seq("3.2.2", "3.2.1", "2.13.10", "2.12.17"),
+  crossScalaVersions := Seq("3.3.0-RC1", "3.2.2", "3.2.1", "2.13.10", "2.12.17"),
 
   githubWorkflowTargetTags ++= Seq("v*"),
   githubWorkflowJavaVersions := Seq(JavaSpec.temurin("17")),

project/build.properties

@@ -1 +1 @@
-sbt.version=1.8.0
+sbt.version=1.8.2

src/main/scala-3/com/github/ghik/zerowaste/ZerowastePlugin.scala

@@ -48,8 +48,8 @@ class ZerowastePhase extends PluginPhase {
     dotty.tools.dotc.report.warning("discarded expression with non-Unit value", tree.srcPos)
 
   private def complete[T <: AnyRef](v: Lazy[T] | T)(using Context): T = v match {
-    case l: Lazy[T] => l.complete
-    case t: T => t
+    case l: Lazy[T@unchecked] => l.complete
+    case t: T@unchecked => t
   }
 
   override def transformUnit(tree: Tree)(using Context): Tree = {
@@ -81,7 +81,7 @@ class ZerowastePhase extends PluginPhase {
 
       case Template(constr, parents, self, body) =>
         detectDiscarded(constr, discarded = false)
-        parents.foreach(detectDiscarded(_, discarded = false))
+        complete(parents).foreach(detectDiscarded(_, discarded = false))
         detectDiscarded(self, discarded = false)
         complete(body).foreach(detectDiscarded(_, discarded = true))