Merge pull request #7900 from dotty-staging/fix-#7898

Fix #7898: Handle annotation without symbols

Author: nicolasstucki

compiler/src/dotty/tools/dotc/tastyreflect/ReflectionCompilerInterface.scala

@@ -1590,6 +1590,7 @@ class ReflectionCompilerInterface(val rootContext: core.Contexts.Context) extend
   type Symbol = core.Symbols.Symbol
 
   def Symbol_owner(self: Symbol)(given Context): Symbol = self.owner
+  def Symbol_maybeOwner(self: Symbol)(given Context): Symbol = self.maybeOwner
 
   def Symbol_flags(self: Symbol)(given Context): Flags = self.flags
 

library/src/scala/tasty/reflect/CompilerInterface.scala

@@ -1164,9 +1164,12 @@ trait CompilerInterface {
    */
   type Symbol <: AnyRef
 
-  /** Owner of this symbol. The owner is the symbol in which this symbol is defined. */
+  /** Owner of this symbol. The owner is the symbol in which this symbol is defined. Throws if this symbol does not have an owner. */
   def Symbol_owner(self: Symbol)(given ctx: Context): Symbol
 
+  /** Owner of this symbol. The owner is the symbol in which this symbol is defined. Returns `NoSymbol` if this symbol does not have an owner. */
+  def Symbol_maybeOwner(self: Symbol)(given ctx: Context): Symbol
+
   /** Flags of this symbol */
   def Symbol_flags(self: Symbol)(given ctx: Context): Flags
 

library/src/scala/tasty/reflect/SourceCodePrinter.scala

@@ -1228,7 +1228,7 @@ class SourceCodePrinter[R <: Reflection & Singleton](val tasty: R)(syntaxHighlig
 
     def printAnnotation(annot: Term)(given elideThis: Option[Symbol]): Buffer = {
       val Annotation(ref, args) = annot
-      if (annot.symbol.owner.fullName == "scala.internal.quoted.showName") this
+      if (annot.symbol.maybeOwner.fullName == "scala.internal.quoted.showName") this
       else {
         this += "@"
         printTypeTree(ref)
@@ -1467,7 +1467,7 @@ class SourceCodePrinter[R <: Reflection & Singleton](val tasty: R)(syntaxHighlig
 
     object ScalaPackage {
       def unapply(tpe: TypeOrBounds)(given ctx: Context): Boolean = tpe match {
-        case tpe: TermRef => tpe.termSymbol == defn.ScalaPackage
+        case tpe: Type => tpe.termSymbol == defn.ScalaPackage
         case _ => false
       }
     }

library/src/scala/tasty/reflect/SymbolOps.scala

@@ -16,9 +16,12 @@ trait SymbolOps extends Core { selfSymbolOps: FlagsOps =>
 
   given symbolOps: extension (self: Symbol) {
 
-    /** Owner of this symbol. The owner is the symbol in which this symbol is defined */
+    /** Owner of this symbol. The owner is the symbol in which this symbol is defined. Throws if this symbol does not have an owner. */
     def owner(given ctx: Context): Symbol = internal.Symbol_owner(self)
 
+    /** Owner of this symbol. The owner is the symbol in which this symbol is defined. Returns `NoSymbol` if this symbol does not have an owner. */
+    def maybeOwner(given ctx: Context): Symbol = internal.Symbol_maybeOwner(self)
+
     /** Flags of this symbol */
     def flags(given ctx: Context): Flags = internal.Symbol_flags(self)
 

tests/run-macros/flops-rewrite.check

@@ -4,6 +4,6 @@ scala.Nil
 scala.Nil.map[scala.Nothing](((x: scala.Nothing) => x)).++[scala.Nothing](scala.Nil.map[scala.Nothing](((x: scala.Nothing) => x)))
 scala.Nil
 
-scala.Nil.map[scala.Nothing](((x: scala.Nothing) => x)).++[scala.Int](scala.List.apply[scala.Int]((3: scala.<repeated>[scala.Int]))).++[scala.Int](scala.Nil)
-scala.List.apply[scala.Int]((3: scala.<repeated>[scala.Int]))
+scala.Nil.map[scala.Nothing](((x: scala.Nothing) => x)).++[scala.Int](scala.List.apply[scala.Int](3)).++[scala.Int](scala.Nil)
+scala.List.apply[scala.Int](3)
 

tests/run-macros/i7898.check

@@ -0,0 +1,4 @@
+scala.List.apply[scala.PartialFunction[scala.Int, scala.Predef.String]](((x$1: scala.Int) => (x$1: @scala.unchecked) match {
+  case 1 =>
+    "x"
+}))

tests/run-macros/i7898/Macro_1.scala

@@ -0,0 +1,17 @@
+import quoted._
+object Main {
+
+  def myMacroImpl(body: Expr[_])(given qctx: QuoteContext): Expr[_] = {
+    import qctx.tasty.{_, given}
+    val bodyTerm = body.underlyingArgument.unseal
+    val showed = bodyTerm.show
+    '{
+      println(${Expr(showed)})
+      ${bodyTerm.seal}
+    }
+  }
+
+  inline def myMacro(body: => Any) <: Any = ${
+    myMacroImpl('body)
+  }
+}

tests/run-macros/i7898/Test_2.scala

@@ -0,0 +1,7 @@
+object Test {
+  def main(args: Array[String]) = {
+    val _ = Main.myMacro(List[PartialFunction[Int, String]] {
+      case 1 => "x"
+    })
+  }
+}

tests/run-macros/quote-matcher-runtime.check

@@ -189,20 +189,20 @@ Pattern: fs()
 Result: Some(List())
 
 Scrutinee: fs()
-Pattern: fs((scala.internal.Quoted.patternHole[scala.Seq[scala.Int]]: scala.<repeated>[scala.Int]))
-Result: Some(List(Expr((: scala.<repeated>[scala.Int]))))
+Pattern: fs(scala.internal.Quoted.patternHole[scala.Seq[scala.Int]]: _*)
+Result: Some(List(Expr()))
 
-Scrutinee: fs((1, 2, 3: scala.<repeated>[scala.Int]))
-Pattern: fs((1, 2, 3: scala.<repeated>[scala.Int]))
+Scrutinee: fs(1, 2, 3)
+Pattern: fs(1, 2, 3)
 Result: Some(List())
 
-Scrutinee: fs((1, 2, 3: scala.<repeated>[scala.Int]))
-Pattern: fs((scala.internal.Quoted.patternHole[scala.Int], scala.internal.Quoted.patternHole[scala.Int], 3: scala.<repeated>[scala.Int]))
+Scrutinee: fs(1, 2, 3)
+Pattern: fs(scala.internal.Quoted.patternHole[scala.Int], scala.internal.Quoted.patternHole[scala.Int], 3)
 Result: Some(List(Expr(1), Expr(2)))
 
-Scrutinee: fs((1, 2, 3: scala.<repeated>[scala.Int]))
-Pattern: fs((scala.internal.Quoted.patternHole[scala.Seq[scala.Int]]: scala.<repeated>[scala.Int]))
-Result: Some(List(Expr((1, 2, 3: scala.<repeated>[scala.Int]))))
+Scrutinee: fs(1, 2, 3)
+Pattern: fs(scala.internal.Quoted.patternHole[scala.Seq[scala.Int]]: _*)
+Result: Some(List(Expr(1, 2, 3)))
 
 Scrutinee: f2(1, 2)
 Pattern: f2(1, 2)
@@ -240,17 +240,17 @@ Scrutinee: ((x: scala.Int) => "abc")
 Pattern: ((x: scala.Int @scala.internal.Quoted.patternBindHole) => scala.internal.Quoted.patternHole[scala.Predef.String])
 Result: Some(List(Sym(x), Expr("abc")))
 
-Scrutinee: scala.StringContext.apply(("abc", "xyz": scala.<repeated>[scala.Predef.String]))
-Pattern: scala.StringContext.apply(("abc", "xyz": scala.<repeated>[scala.Predef.String]))
+Scrutinee: scala.StringContext.apply("abc", "xyz")
+Pattern: scala.StringContext.apply("abc", "xyz")
 Result: Some(List())
 
-Scrutinee: scala.StringContext.apply(("abc", "xyz": scala.<repeated>[scala.Predef.String]))
-Pattern: scala.StringContext.apply((scala.internal.Quoted.patternHole[java.lang.String], scala.internal.Quoted.patternHole[java.lang.String]: scala.<repeated>[scala.Predef.String]))
+Scrutinee: scala.StringContext.apply("abc", "xyz")
+Pattern: scala.StringContext.apply(scala.internal.Quoted.patternHole[java.lang.String], scala.internal.Quoted.patternHole[java.lang.String])
 Result: Some(List(Expr("abc"), Expr("xyz")))
 
-Scrutinee: scala.StringContext.apply(("abc", "xyz": scala.<repeated>[scala.Predef.String]))
-Pattern: scala.StringContext.apply((scala.internal.Quoted.patternHole[scala.Seq[scala.Predef.String]]: scala.<repeated>[scala.Predef.String]))
-Result: Some(List(Expr(("abc", "xyz": scala.<repeated>[scala.Predef.String]))))
+Scrutinee: scala.StringContext.apply("abc", "xyz")
+Pattern: scala.StringContext.apply(scala.internal.Quoted.patternHole[scala.Seq[scala.Predef.String]]: _*)
+Result: Some(List(Expr("abc", "xyz")))
 
 Scrutinee: {
   val a: scala.Int = 45
@@ -714,21 +714,21 @@ Pattern: try scala.internal.Quoted.patternHole[scala.Int] finally {
 }
 Result: Some(List(Expr(1), Expr(2)))
 
-Scrutinee: scala.List.apply[scala.Int]((1, 2, 3: scala.<repeated>[scala.Int])).foreach[scala.Unit](((x: scala.Int) => scala.Predef.println(x)))
+Scrutinee: scala.List.apply[scala.Int](1, 2, 3).foreach[scala.Unit](((x: scala.Int) => scala.Predef.println(x)))
 Pattern: {
   @scala.internal.Quoted.patternBindHole type T
   scala.internal.Quoted.patternHole[scala.List[scala.Int]].foreach[T](scala.internal.Quoted.patternHole[scala.Function1[scala.Int, T]])
 }
-Result: Some(List(Type(scala.Unit), Expr(scala.List.apply[scala.Int]((1, 2, 3: scala.<repeated>[scala.Int]))), Expr(((x: scala.Int) => scala.Predef.println(x)))))
+Result: Some(List(Type(scala.Unit), Expr(scala.List.apply[scala.Int](1, 2, 3)), Expr(((x: scala.Int) => scala.Predef.println(x)))))
 
-Scrutinee: scala.List.apply[scala.Int]((1, 2, 3: scala.<repeated>[scala.Int])).foreach[scala.Unit](((x: scala.Int) => scala.Predef.println(x)))
+Scrutinee: scala.List.apply[scala.Int](1, 2, 3).foreach[scala.Unit](((x: scala.Int) => scala.Predef.println(x)))
 Pattern: {
   @scala.internal.Quoted.patternBindHole type T = scala.Unit
   scala.internal.Quoted.patternHole[scala.List[scala.Int]].foreach[T](scala.internal.Quoted.patternHole[scala.Function1[scala.Int, T]])
 }
-Result: Some(List(Type(scala.Unit), Expr(scala.List.apply[scala.Int]((1, 2, 3: scala.<repeated>[scala.Int]))), Expr(((x: scala.Int) => scala.Predef.println(x)))))
+Result: Some(List(Type(scala.Unit), Expr(scala.List.apply[scala.Int](1, 2, 3)), Expr(((x: scala.Int) => scala.Predef.println(x)))))
 
-Scrutinee: scala.List.apply[scala.Int]((1, 2, 3: scala.<repeated>[scala.Int])).foreach[scala.Unit](((x: scala.Int) => scala.Predef.println(x)))
+Scrutinee: scala.List.apply[scala.Int](1, 2, 3).foreach[scala.Unit](((x: scala.Int) => scala.Predef.println(x)))
 Pattern: {
   @scala.internal.Quoted.patternBindHole type T <: scala.Predef.String
   scala.internal.Quoted.patternHole[scala.List[scala.Int]].foreach[T](scala.internal.Quoted.patternHole[scala.Function1[scala.Int, T]])
@@ -787,15 +787,15 @@ Pattern: {
 }
 Result: None
 
-Scrutinee: scala.List.apply[scala.Int]((1, 2, 3: scala.<repeated>[scala.Int])).map[scala.Double](((x: scala.Int) => x.toDouble./(2))).map[java.lang.String](((y: scala.Double) => y.toString()))
+Scrutinee: scala.List.apply[scala.Int](1, 2, 3).map[scala.Double](((x: scala.Int) => x.toDouble./(2))).map[java.lang.String](((y: scala.Double) => y.toString()))
 Pattern: {
   @scala.internal.Quoted.patternBindHole type T
   @scala.internal.Quoted.patternBindHole type U
   @scala.internal.Quoted.patternBindHole type V
 
   (scala.internal.Quoted.patternHole[scala.List[T]].map[U](scala.internal.Quoted.patternHole[scala.Function1[T, U]]).map[V](scala.internal.Quoted.patternHole[scala.Function1[U, V]]): scala.collection.immutable.List[scala.Any])
 }
-Result: Some(List(Type(scala.Int), Type(scala.Double), Type(java.lang.String), Expr(scala.List.apply[scala.Int]((1, 2, 3: scala.<repeated>[scala.Int]))), Expr(((x: scala.Int) => x.toDouble./(2))), Expr(((y: scala.Double) => y.toString()))))
+Result: Some(List(Type(scala.Int), Type(scala.Double), Type(java.lang.String), Expr(scala.List.apply[scala.Int](1, 2, 3)), Expr(((x: scala.Int) => x.toDouble./(2))), Expr(((y: scala.Double) => y.toString()))))
 
 Scrutinee: ((x: scala.Int) => x)
 Pattern: {

tests/run-macros/quote-matching-optimize-1.check

@@ -16,15 +16,15 @@ Original: ls.filter(((x: scala.Int) => x.<(3))).foreach[scala.Unit](((x: scala.I
 Optimized: ls.foreach[scala.Unit](((x: scala.Int) => if (x.<(3)) scala.Predef.println(x) else ()))
 Result: ()
 
-Original: scala.List.apply[scala.Int]((1, 2, 3: scala.<repeated>[scala.Int])).map[scala.Int](((a: scala.Int) => a.*(2))).map[java.lang.String](((b: scala.Int) => b.toString()))
-Optimized: scala.List.apply[scala.Int]((1, 2, 3: scala.<repeated>[scala.Int])).map[java.lang.String](((x: scala.Int) => {
+Original: scala.List.apply[scala.Int](1, 2, 3).map[scala.Int](((a: scala.Int) => a.*(2))).map[java.lang.String](((b: scala.Int) => b.toString()))
+Optimized: scala.List.apply[scala.Int](1, 2, 3).map[java.lang.String](((x: scala.Int) => {
   val x$1: scala.Int = x.*(2)
   x$1.toString()
 }))
 Result: List(2, 4, 6)
 
-Original: scala.List.apply[scala.Int]((55, 67, 87: scala.<repeated>[scala.Int])).map[scala.Char](((a: scala.Int) => a.toChar)).map[java.lang.String](((b: scala.Char) => b.toString()))
-Optimized: scala.List.apply[scala.Int]((55, 67, 87: scala.<repeated>[scala.Int])).map[java.lang.String](((x: scala.Int) => {
+Original: scala.List.apply[scala.Int](55, 67, 87).map[scala.Char](((a: scala.Int) => a.toChar)).map[java.lang.String](((b: scala.Char) => b.toString()))
+Optimized: scala.List.apply[scala.Int](55, 67, 87).map[java.lang.String](((x: scala.Int) => {
   val x$2: scala.Char = x.toChar
   x$2.toString()
 }))