Always add spans to compiler generated anonotations

Achieved by removing the apply methods without a span argument,
which would generate Annotation trees with empty spans. One can still
put NoSpan as the span argument, so this will not make much of a
difference, but will hopefully provide an additional incentive to always
add one.

compiler/src/dotty/tools/dotc/ast/Desugar.scala

@@ -175,7 +175,7 @@ object desugar {
       case Into(tpt1) =>
         mods1 = vdef.mods.withAddedAnnotation(
           TypedSplice(
-            Annotation(defn.AllowConversionsAnnot).tree.withSpan(tpt.span.startPos)))
+            Annotation(defn.AllowConversionsAnnot, tpt.span.startPos).tree))
         tpt1
       case ByNameTypeTree(tpt1) =>
         cpy.ByNameTypeTree(tpt)(dropInto(tpt1))

compiler/src/dotty/tools/dotc/core/Annotations.scala

@@ -194,36 +194,18 @@ object Annotations {
   object Annotation {
 
     def apply(tree: Tree): ConcreteAnnotation = ConcreteAnnotation(tree)
-
-    def apply(cls: ClassSymbol)(using Context): Annotation =
-      apply(cls, Nil)
 
     def apply(cls: ClassSymbol, span: Span)(using Context): Annotation =
       apply(cls, Nil, span)
 
-    def apply(cls: ClassSymbol, arg: Tree)(using Context): Annotation =
-      apply(cls, arg :: Nil)
-
     def apply(cls: ClassSymbol, arg: Tree, span: Span)(using Context): Annotation =
       apply(cls, arg :: Nil, span)
 
-    def apply(cls: ClassSymbol, arg1: Tree, arg2: Tree)(using Context): Annotation =
-      apply(cls, arg1 :: arg2 :: Nil)
-
-    def apply(cls: ClassSymbol, args: List[Tree])(using Context): Annotation =
-      apply(cls.typeRef, args)
-
     def apply(cls: ClassSymbol, args: List[Tree], span: Span)(using Context): Annotation =
       apply(cls.typeRef, args, span)
 
-    def apply(atp: Type, arg: Tree)(using Context): Annotation =
-      apply(atp, arg :: Nil)
-
-    def apply(atp: Type, arg1: Tree, arg2: Tree)(using Context): Annotation =
-      apply(atp, arg1 :: arg2 :: Nil)
-
-    def apply(atp: Type, args: List[Tree])(using Context): Annotation =
-      apply(New(atp, args))
+    def apply(atp: Type, arg: Tree, span: Span)(using Context): Annotation =
+      apply(atp, arg :: Nil, span)
 
     def apply(atp: Type, args: List[Tree], span: Span)(using Context): Annotation =
       apply(New(atp, args).withSpan(span))
@@ -271,7 +253,7 @@ object Annotations {
 
   def ThrowsAnnotation(cls: ClassSymbol)(using Context): Annotation = {
     val tref = cls.typeRef
-    Annotation(defn.ThrowsAnnot.typeRef.appliedTo(tref), Ident(tref))
+    Annotation(defn.ThrowsAnnot.typeRef.appliedTo(tref), Ident(tref), cls.span)
   }
 
   /** Extracts the type of the thrown exception from an annotation.

compiler/src/dotty/tools/dotc/core/SymDenotations.scala

@@ -283,7 +283,7 @@ object SymDenotations {
 
     /** Add the given annotation without parameters to the annotations of this denotation */
     final def addAnnotation(cls: ClassSymbol)(using Context): Unit =
-      addAnnotation(Annotation(cls))
+      addAnnotation(Annotation(cls, symbol.span))
 
     /** Remove annotation with given class from this denotation */
     final def removeAnnotation(cls: Symbol)(using Context): Unit =

compiler/src/dotty/tools/dotc/core/Types.scala

@@ -3965,9 +3965,9 @@ object Types {
      *   - wrap types of parameters that have an @allowConversions annotation with Into[_]
      */
     def fromSymbols(params: List[Symbol], resultType: Type)(using Context): MethodType =
-      def addAnnotation(tp: Type, cls: ClassSymbol): Type = tp match
-        case ExprType(resType) => ExprType(addAnnotation(resType, cls))
-        case _ => AnnotatedType(tp, Annotation(cls))
+      def addAnnotation(tp: Type, cls: ClassSymbol, param: Symbol): Type = tp match
+        case ExprType(resType) => ExprType(addAnnotation(resType, cls, param))
+        case _ => AnnotatedType(tp, Annotation(cls, param.span))
 
       def wrapConvertible(tp: Type) =
         AppliedType(defn.IntoType.typeRef, tp :: Nil)
@@ -3992,9 +3992,9 @@ object Types {
       def paramInfo(param: Symbol) =
         var paramType = param.info.annotatedToRepeated
         if param.is(Inline) then
-          paramType = addAnnotation(paramType, defn.InlineParamAnnot)
+          paramType = addAnnotation(paramType, defn.InlineParamAnnot, param)
         if param.is(Erased) then
-          paramType = addAnnotation(paramType, defn.ErasedParamAnnot)
+          paramType = addAnnotation(paramType, defn.ErasedParamAnnot, param)
         if param.hasAnnotation(defn.AllowConversionsAnnot) then
           paramType = addInto(paramType)
         paramType

compiler/src/dotty/tools/dotc/core/classfile/ClassfileParser.scala

@@ -764,7 +764,7 @@ class ClassfileParser(
               res.namedParams += (i -> name.name)
 
         case tpnme.AnnotationDefaultATTR =>
-          sym.addAnnotation(Annotation(defn.AnnotationDefaultAnnot, Nil))
+          sym.addAnnotation(Annotation(defn.AnnotationDefaultAnnot, Nil, sym.span))
 
         // Java annotations on classes / methods / fields with RetentionPolicy.RUNTIME
         case tpnme.RuntimeVisibleAnnotationATTR

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

@@ -110,7 +110,7 @@ class CompleteJavaEnums extends MiniPhase with InfoTransformer { thisPhase =>
     yield {
       def forwarderSym(flags: FlagSet, info: Type): Symbol { type ThisName = TermName } =
         val sym = newSymbol(clazz, enumValue.name.asTermName, flags, info)
-        sym.addAnnotation(Annotations.Annotation(defn.ScalaStaticAnnot))
+        sym.addAnnotation(Annotations.Annotation(defn.ScalaStaticAnnot, sym.span))
         sym
       val body = moduleRef.select(enumValue)
       if ctx.settings.scalajs.value then

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

@@ -39,7 +39,7 @@ object ContextFunctionResults:
     val count = contextResultCount(mdef.rhs, mdef.tpt.tpe)
 
     if Config.flattenContextFunctionResults && count != 0 && !disabled then
-      val countAnnot = Annotation(defn.ContextResultCountAnnot, Literal(Constant(count)))
+      val countAnnot = Annotation(defn.ContextResultCountAnnot, Literal(Constant(count)), mdef.symbol.span)
       mdef.symbol.addAnnotation(countAnnot)
   end annotateContextResults
 

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

@@ -112,7 +112,7 @@ class LazyVals extends MiniPhase with IdentityDenotTransformer {
     appendOffsetDefs.get(cls) match {
       case None => template
       case Some(data) =>
-        data.defs.foreach(_.symbol.addAnnotation(Annotation(defn.ScalaStaticAnnot)))
+        data.defs.foreach(defin => defin.symbol.addAnnotation(Annotation(defn.ScalaStaticAnnot, defin.symbol.span)))
         cpy.Template(template)(body = addInFront(data.defs, template.body))
     }
   }
@@ -464,7 +464,7 @@ class LazyVals extends MiniPhase with IdentityDenotTransformer {
     def offsetName(id: Int) = s"${StdNames.nme.LAZY_FIELD_OFFSET}${if (x.symbol.owner.is(Module)) "_m_" else ""}$id".toTermName
     val containerName = LazyLocalName.fresh(x.name.asTermName)
     val containerSymbol = newSymbol(claz, containerName, x.symbol.flags &~ containerFlagsMask | containerFlags | Private, defn.ObjectType, coord = x.symbol.coord).enteredAfter(this)
-    containerSymbol.addAnnotation(Annotation(defn.VolatileAnnot)) // private @volatile var _x: AnyRef
+    containerSymbol.addAnnotation(Annotation(defn.VolatileAnnot, containerSymbol.span)) // private @volatile var _x: AnyRef
     containerSymbol.addAnnotations(x.symbol.annotations) // pass annotations from original definition
     val stat = x.symbol.isStatic
     if stat then
@@ -482,7 +482,7 @@ class LazyVals extends MiniPhase with IdentityDenotTransformer {
         newSymbol(claz, offsetName(info.defs.size), Synthetic, defn.LongType).enteredAfter(this)
       case None =>
         newSymbol(claz, offsetName(0), Synthetic, defn.LongType).enteredAfter(this)
-    offsetSymbol.nn.addAnnotation(Annotation(defn.ScalaStaticAnnot))
+    offsetSymbol.nn.addAnnotation(Annotation(defn.ScalaStaticAnnot, offsetSymbol.nn.span))
     val fieldTree = thizClass.select(lazyNme.RLazyVals.getDeclaredField).appliedTo(Literal(Constant(containerName.mangledString)))
     val offsetTree = ValDef(offsetSymbol.nn, getOffset.appliedTo(fieldTree))
     val offsetInfo = appendOffsetDefs.getOrElseUpdate(claz, new OffsetInfo(Nil))
@@ -625,7 +625,7 @@ class LazyVals extends MiniPhase with IdentityDenotTransformer {
              .symbol.asTerm
         else { // need to create a new flag
           offsetSymbol = newSymbol(claz, offsetById, Synthetic, defn.LongType).enteredAfter(this)
-          offsetSymbol.nn.addAnnotation(Annotation(defn.ScalaStaticAnnot))
+          offsetSymbol.nn.addAnnotation(Annotation(defn.ScalaStaticAnnot, offsetSymbol.nn.span))
           val flagName = LazyBitMapName.fresh(id.toString.toTermName)
           val flagSymbol = newSymbol(claz, flagName, containerFlags, defn.LongType).enteredAfter(this)
           flag = ValDef(flagSymbol, Literal(Constant(0L)))
@@ -636,7 +636,7 @@ class LazyVals extends MiniPhase with IdentityDenotTransformer {
 
       case None =>
         offsetSymbol = newSymbol(claz, offsetName(0), Synthetic, defn.LongType).enteredAfter(this)
-        offsetSymbol.nn.addAnnotation(Annotation(defn.ScalaStaticAnnot))
+        offsetSymbol.nn.addAnnotation(Annotation(defn.ScalaStaticAnnot, offsetSymbol.nn.span))
         val flagName = LazyBitMapName.fresh("0".toTermName)
         val flagSymbol = newSymbol(claz, flagName, containerFlags, defn.LongType).enteredAfter(this)
         flag = ValDef(flagSymbol, Literal(Constant(0L)))

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

@@ -46,7 +46,7 @@ class MoveStatics extends MiniPhase with SymTransformer {
           if (staticFields.nonEmpty) {
             /* do NOT put Flags.JavaStatic here. It breaks .enclosingClass */
             val staticCostructor = newSymbol(orig.symbol, nme.STATIC_CONSTRUCTOR, Flags.Synthetic | Flags.Method | Flags.Private, MethodType(Nil, defn.UnitType))
-            staticCostructor.addAnnotation(Annotation(defn.ScalaStaticAnnot))
+            staticCostructor.addAnnotation(Annotation(defn.ScalaStaticAnnot, staticCostructor.span))
             staticCostructor.entered
 
             val staticAssigns = staticFields.map(x => Assign(ref(x.symbol), x.rhs.changeOwner(x.symbol, staticCostructor)))

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

@@ -297,7 +297,7 @@ object PCPCheckAndHeal {
         flags = Synthetic,
         info = TypeAlias(splicedTree.tpe.select(tpnme.Underlying)),
         coord = span).asType
-      local.addAnnotation(Annotation(defn.QuotedRuntime_SplicedTypeAnnot))
+      local.addAnnotation(Annotation(defn.QuotedRuntime_SplicedTypeAnnot, span))
       ctx.typeAssigner.assignType(untpd.TypeDef(local.name, alias), local)
     }
 

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

@@ -45,7 +45,7 @@ class RepeatableAnnotations extends MiniPhase:
               Nil
             else
               val aggregated = JavaSeqLiteral(anns.map(_.tree).toList, TypeTree(sym.typeRef))
-              Annotation(containerTpe, NamedArg("value".toTermName, aggregated)) :: Nil
+              Annotation(containerTpe, NamedArg("value".toTermName, aggregated), sym.span) :: Nil
           case _ =>
             val pos = anns.head.tree.srcPos
             report.error("Not repeatable annotation repeated", pos)

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

@@ -381,7 +381,7 @@ object SymUtils:
       if original.hasAnnotation(defn.TargetNameAnnot) then
         self.addAnnotation(
           Annotation(defn.TargetNameAnnot,
-            Literal(Constant(nameFn(original.targetName).toString)).withSpan(original.span)))
+            Literal(Constant(nameFn(original.targetName).toString)).withSpan(original.span), original.span))
 
     /** The return type as seen from the body of this definition. It is
      *  computed from the symbol's type by replacing param refs by param symbols.

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

@@ -13,6 +13,7 @@ import ast.untpd
 import ValueClasses.isDerivedValueClass
 import SymUtils._
 import util.Property
+import util.Spans.Span
 import config.Printers.derive
 import NullOpsDecorator._
 
@@ -155,7 +156,7 @@ class SyntheticMembers(thisPhase: DenotTransformer) {
         case nme.hashCode_ => chooseHashcode
         case nme.toString_ => toStringBody(vrefss)
         case nme.equals_ => equalsBody(vrefss.head.head)
-        case nme.canEqual_ => canEqualBody(vrefss.head.head)
+        case nme.canEqual_ => canEqualBody(vrefss.head.head, synthetic.span)
         case nme.ordinal => ordinalRef
         case nme.productArity => Literal(Constant(accessors.length))
         case nme.productPrefix if isEnumValue => nameRef
@@ -260,7 +261,7 @@ class SyntheticMembers(thisPhase: DenotTransformer) {
     def equalsBody(that: Tree)(using Context): Tree = {
       val thatAsClazz = newSymbol(ctx.owner, nme.x_0, SyntheticCase, clazzType, coord = ctx.owner.span) // x$0
       def wildcardAscription(tp: Type) = Typed(Underscore(tp), TypeTree(tp))
-      val pattern = Bind(thatAsClazz, wildcardAscription(AnnotatedType(clazzType, Annotation(defn.UncheckedAnnot)))) // x$0 @ (_: C @unchecked)
+      val pattern = Bind(thatAsClazz, wildcardAscription(AnnotatedType(clazzType, Annotation(defn.UncheckedAnnot, thatAsClazz.span)))) // x$0 @ (_: C @unchecked)
       // compare primitive fields first, slow equality checks of non-primitive fields can be skipped when primitives differ
       val sortedAccessors = accessors.sortBy(accessor => if (accessor.info.typeSymbol.isPrimitiveValueClass) 0 else 1)
       val comparisons = sortedAccessors.map { accessor =>
@@ -390,7 +391,7 @@ class SyntheticMembers(thisPhase: DenotTransformer) {
      *
      *  `@unchecked` is needed for parametric case classes.
      */
-    def canEqualBody(that: Tree): Tree = that.isInstance(AnnotatedType(clazzType, Annotation(defn.UncheckedAnnot)))
+    def canEqualBody(that: Tree, span: Span): Tree = that.isInstance(AnnotatedType(clazzType, Annotation(defn.UncheckedAnnot, span)))
 
     symbolsToSynthesize.flatMap(syntheticDefIfMissing)
   }

compiler/src/dotty/tools/dotc/typer/Namer.scala

@@ -461,7 +461,7 @@ class Namer { typer: Typer =>
         val isProvisional = parents.exists(!_.baseType(defn.AnyClass).exists)
         if isProvisional then
           typr.println(i"provisional superclass $first for $cls")
-          first = AnnotatedType(first, Annotation(defn.ProvisionalSuperClassAnnot))
+          first = AnnotatedType(first, Annotation(defn.ProvisionalSuperClassAnnot, cls.span))
         checkFeasibleParent(first, cls.srcPos, i" in inferred superclass $first") :: parents
   end ensureFirstIsClass
 
@@ -1883,7 +1883,7 @@ class Namer { typer: Typer =>
         // larger choice of overrides (see `default-getter.scala`).
         // For justification on the use of `@uncheckedVariance`, see
         // `default-getter-variance.scala`.
-        AnnotatedType(defaultTp, Annotation(defn.UncheckedVarianceAnnot))
+        AnnotatedType(defaultTp, Annotation(defn.UncheckedVarianceAnnot, sym.span))
       else
         // don't strip @uncheckedVariance annot for default getters
         TypeOps.simplify(tp.widenTermRefExpr,

compiler/src/dotty/tools/dotc/typer/Typer.scala

@@ -1663,7 +1663,7 @@ class Typer(@constructorOnly nestingLevel: Int = 0) extends Namer
 
                 // skip exhaustivity check in later phase
                 // TODO: move the check above to patternMatcher phase
-                val uncheckedTpe = AnnotatedType(sel.tpe.widen, Annotation(defn.UncheckedAnnot))
+                val uncheckedTpe = AnnotatedType(sel.tpe.widen, Annotation(defn.UncheckedAnnot, tree.selector.span))
                 tpd.cpy.Match(result)(
                   selector = tpd.Typed(sel, tpd.TypeTree(uncheckedTpe)),
                   cases = result.cases
@@ -1898,7 +1898,7 @@ class Typer(@constructorOnly nestingLevel: Int = 0) extends Namer
       Typed(res,
         TypeTree(
           AnnotatedType(res.tpe,
-            Annotation(defn.RequiresCapabilityAnnot, cap))))
+            Annotation(defn.RequiresCapabilityAnnot, cap, tree.span))))
     else res
 
   def typedSeqLiteral(tree: untpd.SeqLiteral, pt: Type)(using Context): SeqLiteral = {
@@ -4297,7 +4297,7 @@ class Typer(@constructorOnly nestingLevel: Int = 0) extends Namer
           // this is needed for -Ycheck. Without the annotation Ycheck will
           // skolemize the result type which will lead to different types before
           // and after checking. See i11955.scala.
-          AnnotatedType(conj, Annotation(defn.UncheckedStableAnnot))
+          AnnotatedType(conj, Annotation(defn.UncheckedStableAnnot, tree.symbol.span))
         else conj
       else pt
     gadts.println(i"insert GADT cast from $tree to $target")

compiler/test/dotty/tools/dotc/transform/TypeTestsCastsTest.scala

@@ -6,6 +6,8 @@ import core.*
 import Contexts.*, Decorators.*, Denotations.*, SymDenotations.*, Symbols.*, Types.*
 import Annotations.*
 
+import dotty.tools.dotc.util.Spans.Span
+
 import org.junit.Test
 import org.junit.Assert.*
 
@@ -15,7 +17,7 @@ class TypeTestsCastsTest extends DottyTest:
   @Test def orL = checkFound(List(StringType, LongType), OrType(LongType, StringType, false))
   @Test def orR = checkFound(List(LongType, StringType), OrType(StringType, LongType, false))
 
-  @Test def annot = checkFound(List(StringType, LongType), AnnotatedType(OrType(LongType, StringType, false), Annotation(defn.UncheckedAnnot)))
+  @Test def annot = checkFound(List(StringType, LongType), AnnotatedType(OrType(LongType, StringType, false), Annotation(defn.UncheckedAnnot, Span(0))))
 
   @Test def andL = checkFound(List(StringType), AndType(StringType, AnyType))
   @Test def andR = checkFound(List(StringType), AndType(AnyType, StringType))