Implement ObjectSpace::WeakMap#delete and ObjectSpace::WeakKeyMap#delete

[Feature #19561]

It's useful to be able to remove references from weak maps.

core/objectspace/weakkeymap/delete_spec.rb

@@ -0,0 +1,40 @@
+require_relative '../../../spec_helper'
+
+ruby_version_is '3.3' do
+  describe "ObjectSpace::WeakKeyMap#delete" do
+    it "removes the entry and returns the deleted value" do
+      m = ObjectSpace::WeakKeyMap.new
+      key = Object.new
+      value = Object.new
+      m[key] = value
+
+      m.delete(key).should == value
+      m.key?(key).should == false
+    end
+
+    it "uses equality semantic" do
+      m = ObjectSpace::WeakKeyMap.new
+      key = "foo".upcase
+      value = Object.new
+      m[key] = value
+
+      m.delete("foo".upcase).should == value
+      m.key?(key).should == false
+    end
+
+    it "calls supplied block if the key is not found" do
+      key = Object.new
+      m = ObjectSpace::WeakKeyMap.new
+      return_value = m.delete(key) do |yielded_key|
+        yielded_key.should == key
+        5
+      end
+      return_value.should == 5
+    end
+
+    it "returns nil if the key is not found when no block is given" do
+      m = ObjectSpace::WeakMap.new
+      m.delete(Object.new).should == nil
+    end
+  end
+end

core/objectspace/weakmap/delete_spec.rb

@@ -0,0 +1,30 @@
+require_relative '../../../spec_helper'
+
+ruby_version_is '3.3' do
+  describe "ObjectSpace::WeakMap#delete" do
+    it "removes the entry and returns the deleted value" do
+      m = ObjectSpace::WeakMap.new
+      key = Object.new
+      value = Object.new
+      m[key] = value
+
+      m.delete(key).should == value
+      m.key?(key).should == false
+    end
+
+    it "calls supplied block if the key is not found" do
+      key = Object.new
+      m = ObjectSpace::WeakMap.new
+      return_value = m.delete(key) do |yielded_key|
+        yielded_key.should == key
+        5
+      end
+      return_value.should == 5
+    end
+
+    it "returns nil if the key is not found when no block is given" do
+      m = ObjectSpace::WeakMap.new
+      m.delete(Object.new).should == nil
+    end
+  end
+end