Add maybeOwner to TASTy reflect

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.exists && annot.symbol.owner.fullName == "scala.internal.quoted.showName") this
+      if (annot.symbol.maybeOwner.fullName == "scala.internal.quoted.showName") this
       else {
         this += "@"
         printTypeTree(ref)

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)