From 1ceb974c55c6785c21ab3934fa750ade0702e276 Mon Sep 17 00:00:00 2001
From: Jack Koenig
Date: Thu, 12 Aug 2021 17:04:11 -0700
Subject: Add DataView (#1955)

DataView is a mechanism for "viewing" Scala objects as a subtype of
`Data`. Often, this is useful for viewing one subtype of `Data`, as
another. One can think about a DataView as a cross between a
customizable cast and an untagged union.

A DataView has a Target type `T`, and a View type `V`. DataView requires
that an implementation of `DataProduct` is available for Target types.
DataProduct is a type class that provides a way to iterate on `Data`
children of objects of implementing types.

If a DataView is provided for a type T to a type V, then the function
.viewAs[V] (of type T => V) is available. The object (of type T) returned
by .viewAs is called a "View" and can be used as both an rvalue and an
lvalue. Unlike when using an .asTypeOf cast, connecting to a "View" will
connect to the associated field or fields of the underlying Target.

DataView also enables .viewAsSupertype which is available for viewing
Bundles as a parent Bundle type. It is similar to .viewAs but requires
a prototype object of the Target type which will be cloned in order to
create the returned View. .viewAsSupertype maps between the
corresponding fields of the parent and child Bundle types.---
 src/main/scala/chisel3/stage/phases/Convert.scala | 3 +--
 1 file changed, 1 insertion(+), 2 deletions(-)

(limited to 'src/main')

diff --git a/src/main/scala/chisel3/stage/phases/Convert.scala b/src/main/scala/chisel3/stage/phases/Convert.scala
index bf42b58a..b5b01b8d 100644
--- a/src/main/scala/chisel3/stage/phases/Convert.scala
+++ b/src/main/scala/chisel3/stage/phases/Convert.scala
@@ -29,8 +29,7 @@ class Convert extends Phase {
       /* Convert all Chisel Annotations to FIRRTL Annotations */
       a
         .circuit
-        .annotations
-        .map(_.toFirrtl) ++
+        .firrtlAnnotations ++
       a
         .circuit
         .annotations
-- 
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