Add Attributes data class

Author: nicolasstucki

compiler/src/dotty/tools/dotc/core/tasty/AttributePickler.scala

@@ -10,14 +10,14 @@ import java.nio.charset.StandardCharsets
 object AttributePickler:
 
   def pickleAttributes(
-    scala2StandardLibrary: Boolean,
+    attributes: Attributes,
     pickler: TastyPickler,
     buf: TastyBuffer
   ): Unit =
-    if scala2StandardLibrary then // or any other attribute is set
+    if attributes.scala2StandardLibrary then // or any other attribute is set
       pickler.newSection(AttributesSection, buf)
     // Pickle attributes
-    if scala2StandardLibrary then buf.writeNat(TastyFormat.SCALA2STANDARDLIBRARYattr)
+    if attributes.scala2StandardLibrary then buf.writeNat(TastyFormat.SCALA2STANDARDLIBRARYattr)
 
   end pickleAttributes
 

compiler/src/dotty/tools/dotc/core/tasty/AttributeUnpickler.scala

@@ -10,7 +10,7 @@ import java.nio.charset.StandardCharsets
 class AttributeUnpickler(reader: TastyReader):
   import reader._
 
-  lazy val scala2StandardLibrary = {
+  lazy val attributes = {
     var scala2StandardLibrary = false
     while (!isAtEnd) {
       readNat() match
@@ -19,7 +19,9 @@ class AttributeUnpickler(reader: TastyReader):
         case attribute =>
           assert(false, "Unexpected attribute value: " + attribute)
     }
-    scala2StandardLibrary
+    Attributes(
+      scala2StandardLibrary,
+    )
   }
 
 end AttributeUnpickler

compiler/src/dotty/tools/dotc/core/tasty/Attributes.scala

@@ -0,0 +1,5 @@
+package dotty.tools.dotc.core.tasty
+
+class Attributes(
+  val scala2StandardLibrary: Boolean,
+)

compiler/src/dotty/tools/dotc/core/tasty/ScratchData.scala

@@ -10,7 +10,7 @@ class ScratchData:
   val pickledIndices = new mutable.BitSet
 
   val commentBuffer = new TastyBuffer(5000)
-  val attributeBuffer = new TastyBuffer(128)
+  val attributeBuffer = new TastyBuffer(32)
 
   def reset() =
     assert(delta ne delta1)

compiler/src/dotty/tools/dotc/core/tasty/TastyPrinter.scala

@@ -230,9 +230,9 @@ class TastyPrinter(bytes: Array[Byte]) {
 
     def unpickle(reader: TastyReader, tastyName: NameTable): String = {
       sb.append(s" ${reader.endAddr.index - reader.currentAddr.index}")
-      val attributeUnpickler = new AttributeUnpickler(reader)
+      val attributes = new AttributeUnpickler(reader).attributes
       sb.append(s"  attributes bytes:\n")
-      if attributeUnpickler.scala2StandardLibrary then
+      if attributes.scala2StandardLibrary then
         sb.append("    SCALA2STANDARDLIBRARYattr\n")
       sb.result
     }

compiler/src/dotty/tools/dotc/core/tasty/TreeUnpickler.scala

@@ -100,7 +100,7 @@ class TreeUnpickler(reader: TastyReader,
   private var withCaptureChecks: Boolean = false
 
   private val unpicklingScala2Library =
-    attributeUnpicklerOpt.exists(_.scala2StandardLibrary)
+    attributeUnpicklerOpt.exists(_.attributes.scala2StandardLibrary)
 
   private def registerSym(addr: Addr, sym: Symbol) =
     symAtAddr(addr) = sym

compiler/src/dotty/tools/dotc/transform/Pickler.scala

@@ -108,10 +108,10 @@ class Pickler extends Phase {
                 pickler, treePkl.buf.addrOfTree, treePkl.docString, tree,
                 scratch.commentBuffer)
 
-          AttributePickler.pickleAttributes(
-            ctx.settings.YcompileScala2Library.value,
-            pickler,
-            scratch.attributeBuffer)
+          val attributes = Attributes(
+            scala2StandardLibrary = ctx.settings.YcompileScala2Library.value,
+          )
+          AttributePickler.pickleAttributes(attributes, pickler, scratch.attributeBuffer)
 
           val pickled = pickler.assembleParts()