Add `TypeAlias` to docs

4 files changed, 41 insertions, 7 deletions

diff --git a/doc-tool/src/dotty/tools/dottydoc/core/DocASTPhase.scala b/doc-tool/src/dotty/tools/dottydoc/core/DocASTPhase.scala
index 0ad199ca2..ed31eeb05 100644
--- a/doc-tool/src/dotty/tools/dottydoc/core/DocASTPhase.scala
+++ b/doc-tool/src/dotty/tools/dottydoc/core/DocASTPhase.scala
@@ -85,6 +85,11 @@ class DocASTPhase extends Phase {
         val pkgPath = path(pd.symbol)
         addEntity(PackageImpl(pd.symbol, annotations(pd.symbol), pd.symbol.showFullName, collectEntityMembers(st, pkgPath), pkgPath))
 
+      /** type alias */
+      case t: TypeDef if !t.isClassDef =>
+        val sym = t.symbol
+        TypeAliasImpl(sym, annotations(sym), flags(t), t.name.show, path(sym), None)
+
       /** trait */
       case t @ TypeDef(n, rhs) if t.symbol.is(Flags.Trait) =>
         //TODO: should not `collectMember` from `rhs` - instead: get from symbol, will get inherited members as well
diff --git a/doc-tool/src/dotty/tools/dottydoc/core/MiniPhaseTransform.scala b/doc-tool/src/dotty/tools/dottydoc/core/MiniPhaseTransform.scala
index 100e0af6b..80e2929f7 100644
--- a/doc-tool/src/dotty/tools/dottydoc/core/MiniPhaseTransform.scala
+++ b/doc-tool/src/dotty/tools/dottydoc/core/MiniPhaseTransform.scala
@@ -92,6 +92,17 @@ object transform {
 
           newPackage
         }
+        case t: TypeAlias => transformEntity(t, _.typeAliasTransformation) { t =>
+          TypeAliasImpl(
+            t.symbol,
+            t.annotations,
+            t.modifiers,
+            t.name,
+            t.path,
+            t.alias,
+            t.comment
+          )
+        }
         case c: Class => transformEntity(c, _.classTransformation) { cls =>
           ClassImpl(
             cls.symbol,
@@ -195,8 +206,8 @@ object transform {
       case id => id
     }
 
-    // Partial functions instead????
     def transformPackage(implicit ctx: Context): PartialFunction[Package, Package] = identity
+    def transformTypeAlias(implicit ctx: Context): PartialFunction[TypeAlias, TypeAlias] = identity
     def transformClass(implicit ctx: Context): PartialFunction[Class, Class] = identity
     def transformCaseClass(implicit ctx: Context): PartialFunction[CaseClass, CaseClass] = identity
     def transformTrait(implicit ctx: Context): PartialFunction[Trait, Trait] = identity
@@ -205,6 +216,7 @@ object transform {
     def transformVal(implicit ctx: Context): PartialFunction[Val, Val] = identity
 
     private[transform] def packageTransformation(p: Package)(implicit ctx: Context) = (transformPackage orElse identity)(p)
+    private[transform] def typeAliasTransformation(alias: TypeAlias)(implicit ctx: Context) = (transformTypeAlias orElse identity)(alias)
     private[transform] def classTransformation(cls: Class)(implicit ctx: Context) = (transformClass orElse identity)(cls)
     private[transform] def caseClassTransformation(cc: CaseClass)(implicit ctx: Context) = (transformCaseClass orElse identity)(cc)
     private[transform] def traitTransformation(trt: Trait)(implicit ctx: Context) = (transformTrait orElse identity)(trt)
diff --git a/doc-tool/src/dotty/tools/dottydoc/model/entities.scala b/doc-tool/src/dotty/tools/dottydoc/model/entities.scala
index aea09f745..6f6e8d3e8 100644
--- a/doc-tool/src/dotty/tools/dottydoc/model/entities.scala
+++ b/doc-tool/src/dotty/tools/dottydoc/model/entities.scala
@@ -5,7 +5,7 @@ import comment._
 import references._
 import dotty.tools.dotc.core.Symbols.{ Symbol, NoSymbol }
 
-trait Entity {
+trait Entity { entity =>
   def symbol: Symbol
 
   def name: String
@@ -21,6 +21,12 @@ trait Entity {
 
   def annotations: List[String]
 
+  def children: List[Entity with Members] = entity match {
+    case e: Entity with Members =>
+      e.members.collect { case e: Entity with Members if e.kind != "package" => e }
+    case _ => Nil
+  }
+
   /** All parents from package level i.e. Package to Object to Member etc */
   def parents: List[Entity] = parent match {
     case NonEntity => Nil
@@ -72,8 +78,12 @@ trait ImplicitlyAddedEntity extends Entity {
 
 trait Package extends Entity with Members {
   val kind = "package"
+}
 
-  def children: List[Entity with Members]
+trait TypeAlias extends Entity with Modifiers {
+  val kind = "type"
+  def alias: Option[Reference]
+  def isAbstract: Boolean = !alias.isDefined
 }
 
 trait Class extends Entity with Modifiers with TypeParams with Constructors with SuperTypes with Members {
diff --git a/doc-tool/src/dotty/tools/dottydoc/model/internal.scala b/doc-tool/src/dotty/tools/dottydoc/model/internal.scala
index 9787da7ce..dd592c2e1 100644
--- a/doc-tool/src/dotty/tools/dottydoc/model/internal.scala
+++ b/doc-tool/src/dotty/tools/dottydoc/model/internal.scala
@@ -18,10 +18,17 @@ object internal {
     var members: List[Entity],
     path: List[String],
     var comment: Option[Comment] = None
-  ) extends Package with Impl {
-    def children: List[Entity with Members] =
-      members.collect { case x: Entity with Members => x }
-  }
+  ) extends Package with Impl
+
+  final case class TypeAliasImpl (
+    symbol: Symbol,
+    annotations: List[String],
+    modifiers: List[String],
+    name: String,
+    path: List[String],
+    alias: Option[Reference],
+    var comment: Option[Comment] = None
+  ) extends TypeAlias with Impl
 
   final case class ClassImpl(
     symbol: Symbol,