Deprecate implicit .U() and .S() syntax for literal bit extracts (backport #2534) (#2559)

* Deprecate .U() and .S() syntax for literal bit extracts (#2534)

(cherry picked from commit cadaf33a650ef898fdab2f81244e4ad6a07a9ea8)

# Conflicts:
#	macros/src/main/scala/chisel3/internal/sourceinfo/SourceInfoTransform.scala

* Fix backport conflict (#2560)

Co-authored-by: Jared Barocsi <82000041+jared-barocsi@users.noreply.github.com>

1 files changed, 6 insertions, 6 deletions

diff --git a/core/src/main/scala/chisel3/package.scala b/core/src/main/scala/chisel3/package.scala
index 5521c51e..87024683 100644
--- a/core/src/main/scala/chisel3/package.scala
+++ b/core/src/main/scala/chisel3/package.scala
@@ -7,6 +7,8 @@ import scala.collection.mutable
 /** This package contains the main chisel3 API.
   */
 package object chisel3 {
+  import internal.chiselRuntimeDeprecated
+  import internal.sourceinfo.DeprecatedSourceInfo
   import internal.firrtl.{Port, Width}
   import internal.Builder
 
@@ -39,13 +41,11 @@ package object chisel3 {
       case bigint                => Builder.error(s"Cannot convert $bigint to Bool, must be 0 or 1"); Bool.Lit(false)
     }
 
-    /** Int to UInt conversion, recommended style for constants.
-      */
-    def U: UInt = UInt.Lit(bigint, Width())
+    /** Int to UInt conversion, recommended style for constants. */
+    def U: UInt = UInt.Lit(bigint, Width()) // scalastyle:ignore method.name
 
-    /** Int to SInt conversion, recommended style for constants.
-      */
-    def S: SInt = SInt.Lit(bigint, Width())
+    /** Int to SInt conversion, recommended style for constants. */
+    def S: SInt = SInt.Lit(bigint, Width()) // scalastyle:ignore method.name
 
     /** Int to UInt conversion with specified width, recommended style for constants.
       */