add symmetric difference in sets

vendor/k8s.io/gengo/examples/set-gen/generators/sets.go

@@ -255,15 +255,15 @@ func (s $.type|public$) Clone() $.type|public$ {
 	return result
 }
 
-// Difference returns a set of objects that are not in s2
+// Difference returns a set of objects that are not in s2.
 // For example:
 // s1 = {a1, a2, a3}
 // s2 = {a1, a2, a4, a5}
 // s1.Difference(s2) = {a3}
 // s2.Difference(s1) = {a4, a5}
-func (s $.type|public$) Difference(s2 $.type|public$) $.type|public$ {
+func (s1 $.type|public$) Difference(s2 $.type|public$) $.type|public$ {
 	result := New$.type|public$()
-	for key := range s {
+	for key := range s1 {
 		if !s2.Has(key) {
 			result.Insert(key)
 		}
@@ -271,6 +271,16 @@ func (s $.type|public$) Difference(s2 $.type|public$) $.type|public$ {
 	return result
 }
 
+// SymmetricDifference returns a set of elements which are in either of the sets, but not in their intersection.
+// For example:
+// s1 = {a1, a2, a3}
+// s2 = {a1, a2, a4, a5}
+// s1.SymmetricDifference(s2) = {a3, a4, a5}
+// s2.SymmetricDifference(s1) = {a3, a4, a5}
+func (s1 $.type|public$) SymmetricDifference(s2 $.type|public$) $.type|public$ {
+	return s1.Difference(s2).Union(s2.Difference(s1))
+}
+
 // Union returns a new set which includes items in either s1 or s2.
 // For example:
 // s1 = {a1, a2}

vendor/k8s.io/gengo/examples/set-gen/sets/byte.go

@@ -96,15 +96,15 @@ func (s Byte) Clone() Byte {
 	return result
 }
 
-// Difference returns a set of objects that are not in s2
+// Difference returns a set of objects that are not in s2.
 // For example:
 // s1 = {a1, a2, a3}
 // s2 = {a1, a2, a4, a5}
 // s1.Difference(s2) = {a3}
 // s2.Difference(s1) = {a4, a5}
-func (s Byte) Difference(s2 Byte) Byte {
+func (s1 Byte) Difference(s2 Byte) Byte {
 	result := NewByte()
-	for key := range s {
+	for key := range s1 {
 		if !s2.Has(key) {
 			result.Insert(key)
 		}
@@ -112,6 +112,16 @@ func (s Byte) Difference(s2 Byte) Byte {
 	return result
 }
 
+// SymmetricDifference returns a set of elements which are in either of the sets, but not in their intersection.
+// For example:
+// s1 = {a1, a2, a3}
+// s2 = {a1, a2, a4, a5}
+// s1.SymmetricDifference(s2) = {a3, a4, a5}
+// s2.SymmetricDifference(s1) = {a3, a4, a5}
+func (s1 Byte) SymmetricDifference(s2 Byte) Byte {
+	return s1.Difference(s2).Union(s2.Difference(s1))
+}
+
 // Union returns a new set which includes items in either s1 or s2.
 // For example:
 // s1 = {a1, a2}

vendor/k8s.io/gengo/examples/set-gen/sets/int.go

@@ -96,15 +96,15 @@ func (s Int) Clone() Int {
 	return result
 }
 
-// Difference returns a set of objects that are not in s2
+// Difference returns a set of objects that are not in s2.
 // For example:
 // s1 = {a1, a2, a3}
 // s2 = {a1, a2, a4, a5}
 // s1.Difference(s2) = {a3}
 // s2.Difference(s1) = {a4, a5}
-func (s Int) Difference(s2 Int) Int {
+func (s1 Int) Difference(s2 Int) Int {
 	result := NewInt()
-	for key := range s {
+	for key := range s1 {
 		if !s2.Has(key) {
 			result.Insert(key)
 		}
@@ -112,6 +112,16 @@ func (s Int) Difference(s2 Int) Int {
 	return result
 }
 
+// SymmetricDifference returns a set of elements which are in either of the sets, but not in their intersection.
+// For example:
+// s1 = {a1, a2, a3}
+// s2 = {a1, a2, a4, a5}
+// s1.SymmetricDifference(s2) = {a3, a4, a5}
+// s2.SymmetricDifference(s1) = {a3, a4, a5}
+func (s1 Int) SymmetricDifference(s2 Int) Int {
+	return s1.Difference(s2).Union(s2.Difference(s1))
+}
+
 // Union returns a new set which includes items in either s1 or s2.
 // For example:
 // s1 = {a1, a2}

vendor/k8s.io/gengo/examples/set-gen/sets/int64.go

@@ -96,15 +96,15 @@ func (s Int64) Clone() Int64 {
 	return result
 }
 
-// Difference returns a set of objects that are not in s2
+// Difference returns a set of objects that are not in s2.
 // For example:
 // s1 = {a1, a2, a3}
 // s2 = {a1, a2, a4, a5}
 // s1.Difference(s2) = {a3}
 // s2.Difference(s1) = {a4, a5}
-func (s Int64) Difference(s2 Int64) Int64 {
+func (s1 Int64) Difference(s2 Int64) Int64 {
 	result := NewInt64()
-	for key := range s {
+	for key := range s1 {
 		if !s2.Has(key) {
 			result.Insert(key)
 		}
@@ -112,6 +112,16 @@ func (s Int64) Difference(s2 Int64) Int64 {
 	return result
 }
 
+// SymmetricDifference returns a set of elements which are in either of the sets, but not in their intersection.
+// For example:
+// s1 = {a1, a2, a3}
+// s2 = {a1, a2, a4, a5}
+// s1.SymmetricDifference(s2) = {a3, a4, a5}
+// s2.SymmetricDifference(s1) = {a3, a4, a5}
+func (s1 Int64) SymmetricDifference(s2 Int64) Int64 {
+	return s1.Difference(s2).Union(s2.Difference(s1))
+}
+
 // Union returns a new set which includes items in either s1 or s2.
 // For example:
 // s1 = {a1, a2}

vendor/k8s.io/gengo/examples/set-gen/sets/string.go

@@ -96,15 +96,15 @@ func (s String) Clone() String {
 	return result
 }
 
-// Difference returns a set of objects that are not in s2
+// Difference returns a set of objects that are not in s2.
 // For example:
 // s1 = {a1, a2, a3}
 // s2 = {a1, a2, a4, a5}
 // s1.Difference(s2) = {a3}
 // s2.Difference(s1) = {a4, a5}
-func (s String) Difference(s2 String) String {
+func (s1 String) Difference(s2 String) String {
 	result := NewString()
-	for key := range s {
+	for key := range s1 {
 		if !s2.Has(key) {
 			result.Insert(key)
 		}
@@ -112,6 +112,16 @@ func (s String) Difference(s2 String) String {
 	return result
 }
 
+// SymmetricDifference returns a set of elements which are in either of the sets, but not in their intersection.
+// For example:
+// s1 = {a1, a2, a3}
+// s2 = {a1, a2, a4, a5}
+// s1.SymmetricDifference(s2) = {a3, a4, a5}
+// s2.SymmetricDifference(s1) = {a3, a4, a5}
+func (s1 String) SymmetricDifference(s2 String) String {
+	return s1.Difference(s2).Union(s2.Difference(s1))
+}
+
 // Union returns a new set which includes items in either s1 or s2.
 // For example:
 // s1 = {a1, a2}

vendor/k8s.io/gengo/parser/parse.go

@@ -674,6 +674,7 @@ func tcNameToName(in string) types.Name {
 		strings.HasPrefix(in, "chan<-") ||
 		strings.HasPrefix(in, "chan ") ||
 		strings.HasPrefix(in, "func(") ||
+		strings.HasPrefix(in, "func (") ||
 		strings.HasPrefix(in, "*") ||
 		strings.HasPrefix(in, "map[") ||
 		strings.HasPrefix(in, "[") {