dev-libs/libgee: update EAPI 7 -> 8, backport Vala (-> C99) fixes

In this case, it appears the Vala itself was wrong, which meant the generated
C was wrong, rather than the Vala being right, but valac generating junk.

Bug: https://bugs.gentoo.org/915015
Closes: https://bugs.gentoo.org/894376
Signed-off-by: Sam James <sam@gentoo.org>

dev-libs/libgee/files/libgee-0.20.6-c99-2.patch

@@ -0,0 +1,55 @@
+https://bugs.gentoo.org/894376
+https://gitlab.gnome.org/GNOME/libgee/-/commit/2f0bbe8987e5eb1390b23ac531c971b202c2ef77
+
+From 2f0bbe8987e5eb1390b23ac531c971b202c2ef77 Mon Sep 17 00:00:00 2001
+From: Rico Tzschichholz <ricotz@ubuntu.com>
+Date: Thu, 13 Apr 2023 23:43:03 +0200
+Subject: [PATCH] Implementations of "G List.get()" should use non-nullable
+ return as defined
+
+--- a/gee/abstractlist.vala
++++ b/gee/abstractlist.vala
+@@ -39,7 +39,7 @@ public abstract class Gee.AbstractList<G> : Gee.AbstractCollection<G>, List<G> {
+ 	/**
+ 	 * {@inheritDoc}
+ 	 */
+-	public abstract new G? get (int index);
++	public abstract new G get (int index);
+ 
+ 	/**
+ 	 * {@inheritDoc}
+--- a/gee/concurrentlist.vala
++++ b/gee/concurrentlist.vala
+@@ -170,7 +170,7 @@ public class Gee.ConcurrentList<G> : AbstractList<G> {
+ 	/**
+ 	 * {@inheritDoc}
+ 	 */
+-	public override G? get (int index) {
++	public override G get (int index) {
+ 		HazardPointer.Context ctx = new HazardPointer.Context ();
+ 		Utils.Misc.unused (ctx);
+ 		assert (index >= 0);
+--- a/gee/readonlylist.vala
++++ b/gee/readonlylist.vala
+@@ -74,7 +74,7 @@ internal class Gee.ReadOnlyList<G> : Gee.ReadOnlyCollection<G>, List<G> {
+ 	/**
+ 	 * {@inheritDoc}
+ 	 */
+-	public new G? get (int index) {
++	public new G get (int index) {
+ 		return ((Gee.List<G>) _collection).get (index);
+ 	}
+ 
+--- a/gee/unrolledlinkedlist.vala
++++ b/gee/unrolledlinkedlist.vala
+@@ -158,7 +158,7 @@ public class Gee.UnrolledLinkedList<G> : AbstractBidirList<G>, Queue<G>, Deque<G
+ 		return new Iterator<G> (this);
+ 	}
+ 
+-	public override G? get (int index) {
++	public override G get (int index) {
+ 		assert (index >= 0);
+ 		assert (index < this._size);
+ 
+-- 
+GitLab

dev-libs/libgee/files/libgee-0.20.6-c99.patch

@@ -0,0 +1,43 @@
+https://bugs.gentoo.org/894376
+https://gitlab.gnome.org/GNOME/libgee/-/commit/b33a6627f4fc96938b6015e05849867c472160a8
+
+From b33a6627f4fc96938b6015e05849867c472160a8 Mon Sep 17 00:00:00 2001
+From: Rico Tzschichholz <ricotz@ubuntu.com>
+Date: Sat, 8 Apr 2023 22:39:35 +0200
+Subject: [PATCH] Add more missing generic type arguments
+
+--- a/gee/hashmap.vala
++++ b/gee/hashmap.vala
+@@ -253,7 +253,7 @@ public class Gee.HashMap<K,V> : Gee.AbstractMap<K,V> {
+ 		for (int i = 0; i < _array_size; i++) {
+ 			Node<K,V> node = (owned) _nodes[i];
+ 			while (node != null) {
+-				Node next = (owned) node.next;
++				Node<K,V> next = (owned) node.next;
+ 				node.key = null;
+ 				node.value = null;
+ 				node = (owned) next;
+--- a/gee/hashset.vala
++++ b/gee/hashset.vala
+@@ -210,7 +210,7 @@ public class Gee.HashSet<G> : AbstractSet<G> {
+ 		for (int i = 0; i < _array_size; i++) {
+ 			Node<G> node = (owned) _nodes[i];
+ 			while (node != null) {
+-				Node next = (owned) node.next;
++				Node<G> next = (owned) node.next;
+ 				node.key = null;
+ 				node = (owned) next;
+ 			}
+--- a/gee/linkedlist.vala
++++ b/gee/linkedlist.vala
+@@ -233,7 +233,7 @@ public class Gee.LinkedList<G> : AbstractBidirList<G>, Queue<G>, Deque<G> {
+ 				n.next.prev = n;
+ 				this._head = (owned)n;
+ 			} else {
+-				weak Node prev = this._head;
++				weak Node<G> prev = this._head;
+ 				for (int i = 0; i < index - 1; i++) {
+ 					prev = prev.next;
+ 				}
+-- 
+GitLab

dev-libs/libgee/libgee-0.20.6-r1.ebuild

@@ -0,0 +1,40 @@
+# Copyright 1999-2023 Gentoo Authors
+# Distributed under the terms of the GNU General Public License v2
+
+EAPI=8
+
+inherit gnome2 vala
+
+DESCRIPTION="GObject-based interfaces and classes for commonly used data structures"
+HOMEPAGE="https://wiki.gnome.org/Projects/Libgee"
+
+LICENSE="LGPL-2.1+"
+SLOT="0.8/2"
+KEYWORDS="~alpha ~amd64 ~arm ~arm64 ~ia64 ~loong ~ppc ~ppc64 ~riscv ~sparc ~x86 ~x86-linux"
+IUSE="+introspection"
+
+# FIXME: add doc support, requires valadoc
+RDEPEND="
+	>=dev-libs/glib-2.36:2
+	introspection? ( >=dev-libs/gobject-introspection-0.9.6:= )
+"
+DEPEND="${RDEPEND}"
+BDEPEND="virtual/pkgconfig"
+
+PATCHES=(
+	"${FILESDIR}"/libgee-0.20.6-c99.patch
+	"${FILESDIR}"/libgee-0.20.6-c99-2.patch
+)
+
+src_prepare() {
+	vala_setup
+	gnome2_src_prepare
+}
+
+src_configure() {
+	# Commented out VALAC="$(type -P false)" for c99 patches
+	# We can drop all the Vala wiring and use the shipped files once
+	# a new release is made.
+	gnome2_src_configure \
+		$(use_enable introspection)
+}