reflect, internal/reflectlite: add Value.SetIter{Key,Value} and MapIter.Reset

Fixes #4790. Depends on #4787 (merge that first).

src/reflect/all_test.go

@@ -381,8 +381,6 @@ func TestSetValue(t *testing.T) {
 	}
 }
 
-/*
-
 func TestMapIterSet(t *testing.T) {
 	m := make(map[string]any, len(valueTests))
 	for _, tt := range valueTests {
@@ -430,8 +428,6 @@ func TestMapIterSet(t *testing.T) {
 	}
 }
 
-*/
-
 func TestCanIntUintFloatComplex(t *testing.T) {
 	type integer int
 	type uinteger uint
@@ -7955,6 +7951,8 @@ func TestConvertibleTo(t *testing.T) {
 	}
 }
 
+*/
+
 func TestSetIter(t *testing.T) {
 	data := map[string]int{
 		"foo": 1,
@@ -8044,6 +8042,8 @@ func TestSetIter(t *testing.T) {
 	}
 }
 
+/*
+
 func TestMethodCallValueCodePtr(t *testing.T) {
 	m := ValueOf(Point{}).Method(1)
 	want := MethodValueCallCodePtr()

src/reflect/value.go

@@ -65,14 +65,26 @@ func (it *MapIter) Key() Value {
 	return Value{((*reflectlite.MapIter)(it)).Key()}
 }
 
+func (v Value) SetIterKey(iter *MapIter) {
+	v.Value.SetIterKey((*reflectlite.MapIter)(iter))
+}
+
 func (it *MapIter) Value() Value {
 	return Value{((*reflectlite.MapIter)(it)).Value()}
 }
 
+func (v Value) SetIterValue(iter *MapIter) {
+	v.Value.SetIterValue((*reflectlite.MapIter)(iter))
+}
+
 func (it *MapIter) Next() bool {
 	return ((*reflectlite.MapIter)(it)).Next()
 }
 
+func (iter *MapIter) Reset(v Value) {
+	(*reflectlite.MapIter)(iter).Reset(v.Value)
+}
+
 func (v Value) Set(x Value) {
 	v.Value.Set(x.Value)
 }