I want to add support to gcc:13 for ada packages

In attachment the new ada.eclass.

Inline are the changes applyed:

--- ada.eclass	2023-11-04 13:38:30.857702705 +0100
+++ ada.eclass.new	2023-11-03 23:16:34.643870434 +0100
@@ -57,7 +57,7 @@
 # @DESCRIPTION:
 # All supported Ada implementations, most preferred last.
 _ADA_ALL_IMPLS=(
-	gnat_2021 gcc_12
+	gnat_2021 gcc_12 gcc_13
 )
 readonly _ADA_ALL_IMPLS
 
@@ -119,10 +119,7 @@
 	# keep in sync with _ADA_ALL_IMPLS!
 	# (not using that list because inline patterns shall be faster)
 	case "${impl}" in
-		gnat_2021)
-			return 0
-			;;
-		gcc_12)
+		gnat_2021|gcc_12|gcc_13)
 			return 0
 			;;
 		*)
@@ -216,11 +213,7 @@
 	local impl var
 
 	case "${1}" in
-		gnat_2021)
-			impl=${1}
-			shift
-			;;
-		gcc_12)
+		gnat_2021|gcc_12|gcc_13)
 			impl=${1}
 			shift
 			;;
@@ -244,6 +237,10 @@
 			gcc_pv=12
 			slot=12
 			;;
+		gcc_13)
+			gcc_pv=13
+			slot=13
+			;;
 		*)
 			gcc_pv="9.9.9"
 			slot=9.9.9
@@ -293,7 +290,7 @@
 					gnat_2021)
 						ADA_PKG_DEP="dev-lang/gnat-gpl:${slot}[ada]"
 						;;
-					gcc_12)
+					gcc_12|gcc_13)
 						ADA_PKG_DEP="sys-devel/gcc:${slot}[ada]"
 						;;
 					*)


Any comments? Can I do things better?

Alfredo