Merge pull request #381 from adpi2/fix-target-name

Fix stepping into method with @TargetNAME

Author: adpi2

build.sbt

@@ -201,7 +201,7 @@ lazy val scala3StepFilter: Project = project
     scalaVersion := Dependencies.scala31Plus,
     Compile / doc / sources := Seq.empty,
     libraryDependencies ++= Seq(
-      "ch.epfl.scala" %% "tasty-query" % "0.5.7",
+      "ch.epfl.scala" %% "tasty-query" % "0.6.1",
       "org.scala-lang" %% "tasty-core" % scalaVersion.value,
       Dependencies.munit % Test
     ),

modules/scala-3-step-filter/src/main/scala/ch/epfl/scala/debugadapter/internal/stepfilter/ScalaStepFilterBridge.scala

@@ -63,10 +63,7 @@ class ScalaStepFilterBridge(
         .collect { case sym: TermSymbol if sym.isTerm => sym }
     yield term
 
-  private def findDeclaringType(
-      fqcn: String,
-      isExtensionMethod: Boolean
-  ): Option[DeclaringSymbol] =
+  private def findDeclaringType(fqcn: String, isExtensionMethod: Boolean): Option[DeclaringSymbol] =
     val javaParts = fqcn.split('.')
     val isObject = fqcn.endsWith("$")
     val packageNames = javaParts.dropRight(1).toList.map(SimpleName.apply)
@@ -75,36 +72,30 @@ class ScalaStepFilterBridge(
       then ctx.findSymbolFromRoot(packageNames).asInstanceOf[PackageSymbol]
       else ctx.defn.EmptyPackage
     val className = javaParts.last
-    def findRec(
-        owner: DeclaringSymbol,
-        encodedName: String
-    ): Seq[DeclaringSymbol] =
-      owner.declarations
-        .collect { case sym: DeclaringSymbol => sym }
-        .flatMap { sym =>
-          val encodedSymName = NameTransformer.encode(sym.name.toString)
-          val Symbol = s"${Regex.quote(encodedSymName)}\\$$?(.*)".r
-          encodedName match
-            case Symbol(remaining) =>
-              if remaining.isEmpty then Some(sym)
-              else findRec(sym, remaining)
-            case _ => None
-        }
-    val clsSymbols = findRec(packageSym, className)
+    val clsSymbols = findSymbolsRecursively(packageSym, className)
     val obj = clsSymbols.filter(_.is(Flags.Module))
     val cls = clsSymbols.filter(!_.is(Flags.Module))
     assert(obj.size <= 1 && cls.size <= 1)
     if isObject && !isExtensionMethod then obj.headOption else cls.headOption
 
-  private def matchSymbol(
-      method: jdi.Method,
-      symbol: TermSymbol,
-      isExtensionMethod: Boolean
-  ): Boolean =
-    matchName(method, symbol, isExtensionMethod) &&
+  private def findSymbolsRecursively(owner: DeclaringSymbol, encodedName: String): Seq[DeclaringSymbol] =
+    owner.declarations
+      .collect { case sym: DeclaringSymbol => sym }
+      .flatMap { sym =>
+        val encodedSymName = NameTransformer.encode(sym.name.toString)
+        val Symbol = s"${Regex.quote(encodedSymName)}\\$$?(.*)".r
+        encodedName match
+          case Symbol(remaining) =>
+            if remaining.isEmpty then Some(sym)
+            else findSymbolsRecursively(sym, remaining)
+          case _ => None
+      }
+
+  private def matchSymbol(method: jdi.Method, symbol: TermSymbol, isExtensionMethod: Boolean): Boolean =
+    matchTargetName(method, symbol, isExtensionMethod) &&
       matchSignature(method, symbol, isExtensionMethod)
 
-  def matchName(
+  def matchTargetName(
       method: jdi.Method,
       symbol: TermSymbol,
       isExtensionMethod: Boolean
@@ -114,7 +105,7 @@ class ScalaStepFilterBridge(
     // and prefixes its name with the full class name.
     // Example: method foo in class example.Inner becomes example$Inner$$foo
     val expectedName = method.name.stripPrefix(javaPrefix)
-    val encodedScalaName = NameTransformer.encode(symbol.name.toString)
+    val encodedScalaName = NameTransformer.encode(symbol.targetName.toString)
     if isExtensionMethod then encodedScalaName == expectedName.stripSuffix("$extension")
     else encodedScalaName == expectedName
 

modules/tests/src/test/scala/ch/epfl/scala/debugadapter/StepFilterTests.scala

@@ -2,7 +2,27 @@ package ch.epfl.scala.debugadapter
 
 import ch.epfl.scala.debugadapter.testfmk.*
 
-class Scala3StepFilterTests extends StepFilterTests(ScalaVersion.`3.1+`)
+class Scala3StepFilterTests extends StepFilterTests(ScalaVersion.`3.1+`) {
+  test("step into method with @targetName") {
+    val source =
+      """|package example
+         |
+         |import scala.annotation.targetName
+         |
+         |object Main {
+         |  def main(args: Array[String]): Unit =
+         |    m("Hello")
+         |
+         |  @targetName("mTarget")
+         |  def m(message: String): Unit =
+         |    println(message)
+         |}
+         |""".stripMargin
+    implicit val debuggee: TestingDebuggee = TestingDebuggee.mainClass(source, "example.Main", scalaVersion)
+    check(Breakpoint(7), StepIn.method("Main$.mTarget(String)"))
+  }
+}
+
 class Scala212StepFilterTests extends StepFilterTests(ScalaVersion.`2.12`)
 class Scala213StepFilterTests extends StepFilterTests(ScalaVersion.`2.13`) {
   test("should match all kinds of Scala 2 types (not valid in Scala 3)") {
@@ -31,7 +51,7 @@ class Scala213StepFilterTests extends StepFilterTests(ScalaVersion.`2.13`) {
   }
 }
 
-abstract class StepFilterTests(scalaVersion: ScalaVersion) extends DebugTestSuite {
+abstract class StepFilterTests(protected val scalaVersion: ScalaVersion) extends DebugTestSuite {
   test("should not step into mixin forwarder") {
     val source =
       """|package example