PowerShell · daxian-dbw · May 12, 2025 · Mar 27, 2025 · Mar 27, 2025 · Mar 27, 2025
@@ -2835,7 +2835,7 @@ internal PropertyCacheEntry(PropertyInfo property)
 
                 // Get the public or protected getter
                 MethodInfo propertyGetter = property.GetGetMethod(true);
-                if (propertyGetter != null && (propertyGetter.IsPublic || propertyGetter.IsFamily))
+                if (propertyGetter != null && (propertyGetter.IsPublic || propertyGetter.IsFamily || propertyGetter.IsFamilyOrAssembly))
                 {
                     this.isStatic = propertyGetter.IsStatic;
                     // Delegate is initialized later to avoid jit if it's not called
@@ -2847,7 +2847,7 @@ internal PropertyCacheEntry(PropertyInfo property)
 
                 // Get the public or protected setter
                 MethodInfo propertySetter = property.GetSetMethod(true);
-                if (propertySetter != null && (propertySetter.IsPublic || propertySetter.IsFamily))
+                if (propertySetter != null && (propertySetter.IsPublic || propertySetter.IsFamily || propertySetter.IsFamilyOrAssembly))
                 {
                     this.isStatic = propertySetter.IsStatic;
                 }

@@ -5297,7 +5297,8 @@ public override DynamicMetaObject FallbackGetMember(DynamicMetaObject target, Dy
                             var propertyAccessor = adapterData.member as PropertyInfo;
                             if (propertyAccessor != null)
                             {
-                                if (propertyAccessor.GetMethod.IsFamily &&
+                                var propertyGetter = propertyAccessor.GetMethod;
+                                if ((propertyGetter.IsFamily || propertyGetter.IsFamilyOrAssembly) &&
                                     (_classScope == null || !_classScope.IsSubclassOf(propertyAccessor.DeclaringType)))
                                 {
                                     return GenerateGetPropertyException(restrictions).WriteToDebugLog(this);
@@ -5757,8 +5758,8 @@ internal PSMemberInfo GetPSMemberInfo(DynamicMetaObject target,
                             var getMethod = propertyInfo.GetGetMethod(nonPublic: true);
                             var setMethod = propertyInfo.GetSetMethod(nonPublic: true);
 
-                            if ((getMethod == null || getMethod.IsFamily || getMethod.IsPublic) &&
-                                (setMethod == null || setMethod.IsFamily || setMethod.IsPublic))
+                            if ((getMethod == null || getMethod.IsPublic || getMethod.IsFamily || getMethod.IsFamilyOrAssembly) &&
+                                (setMethod == null || setMethod.IsPublic || setMethod.IsFamily || setMethod.IsFamilyOrAssembly))
                             {
                                 memberInfo = new PSProperty(this.Name, PSObject.DotNetInstanceAdapter, target.Value, new DotNetAdapter.PropertyCacheEntry(propertyInfo));
                             }
@@ -5768,15 +5769,15 @@ internal PSMemberInfo GetPSMemberInfo(DynamicMetaObject target,
                             var fieldInfo = member as FieldInfo;
                             if (fieldInfo != null)
                             {
-                                if (fieldInfo.IsFamily)
+                                if (fieldInfo.IsFamily || fieldInfo.IsFamilyOrAssembly)
                                 {
                                     memberInfo = new PSProperty(this.Name, PSObject.DotNetInstanceAdapter, target.Value, new DotNetAdapter.PropertyCacheEntry(fieldInfo));
                                 }
                             }
                             else
                             {
                                 var methodInfo = member as MethodInfo;
-                                if (methodInfo != null && (methodInfo.IsPublic || methodInfo.IsFamily))
+                                if (methodInfo != null && (methodInfo.IsPublic || methodInfo.IsFamily || methodInfo.IsFamilyOrAssembly))
                                 {
                                     candidateMethods ??= new List<MethodBase>();
 
@@ -6291,7 +6292,8 @@ public override DynamicMetaObject FallbackSetMember(DynamicMetaObject target, Dy
                         var targetExpr = _static ? null : PSGetMemberBinder.GetTargetExpr(target, data.member.DeclaringType);
                         if (propertyInfo != null)
                         {
-                            if (propertyInfo.SetMethod.IsFamily &&
+                            var propertySetter = propertyInfo.SetMethod;
+                            if ((propertySetter.IsFamily || propertySetter.IsFamilyOrAssembly) &&
                                 (_classScope == null || !_classScope.IsSubclassOf(propertyInfo.DeclaringType)))
                             {
                                 return GeneratePropertyAssignmentException(restrictions).WriteToDebugLog(this);
@@ -7891,7 +7893,7 @@ public override DynamicMetaObject FallbackInvokeMember(DynamicMetaObject target,
                 ? BindingRestrictions.GetTypeRestriction(target.Expression, target.Value.GetType())
                 : target.PSGetTypeRestriction();
             restrictions = args.Aggregate(restrictions, static (current, arg) => current.Merge(arg.PSGetMethodArgumentRestriction()));
-            var newConstructors = DotNetAdapter.GetMethodInformationArray(ctors.Where(static c => c.IsPublic || c.IsFamily).ToArray());
+            var newConstructors = DotNetAdapter.GetMethodInformationArray(ctors.Where(static c => c.IsPublic || c.IsFamily || c.IsFamilyOrAssembly).ToArray());
             return PSInvokeMemberBinder.InvokeDotNetMethod(_callInfo, "new", _constraints, PSInvokeMemberBinder.MethodInvocationType.BaseCtor,
                                                            target, args, restrictions, newConstructors, typeof(MethodException));
         }

@@ -715,3 +715,209 @@ Describe 'Base type has abstract properties' -Tags "CI" {
         $failure.Exception.Message | Should -BeLike "*'get_Exists'*"
     }
 }
+
+Describe 'Classes inheritance with protected and protected internal members in base class' -Tags 'CI' {
+
+    BeforeAll {
+        Set-StrictMode -Version 3
+        $c1DefinitionProtectedInternal = @'
+            public class C1ProtectedInternal
+            {
+                protected internal string InstanceField = "C1_InstanceField";
+                protected internal string InstanceProperty { get; set; } = "C1_InstanceProperty";
+                protected internal string InstanceMethod() { return "C1_InstanceMethod"; }
+
+                protected internal virtual string VirtualProperty1 { get; set; } = "C1_VirtualProperty1";
+                protected internal virtual string VirtualProperty2 { get; set; } = "C1_VirtualProperty2";
+                protected internal virtual string VirtualMethod1() { return "C1_VirtualMethod1"; }
+                protected internal virtual string VirtualMethod2() { return "C1_VirtualMethod2"; }
+
+                public string CtorUsed {  get; set; }
+                public C1ProtectedInternal() { CtorUsed = "default ctor"; }
+                protected internal C1ProtectedInternal(string p1) { CtorUsed = "C1_ctor_1args:" + p1; }
+            }
+'@
+        $c2DefinitionProtectedInternal = @'
+            class C2ProtectedInternal : C1ProtectedInternal {
+                C2ProtectedInternal() : base() { $this.VirtualProperty2 = 'C2_VirtualProperty2' }
+                C2ProtectedInternal([string]$p1) : base($p1) { $this.VirtualProperty2 = 'C2_VirtualProperty2' }
+
+                [string]GetInstanceField() { return $this.InstanceField }
+                [string]SetInstanceField([string]$value) { $this.InstanceField = $value; return $this.InstanceField }
+                [string]GetInstanceProperty() { return $this.InstanceProperty }
+                [string]SetInstanceProperty([string]$value) { $this.InstanceProperty = $value; return $this.InstanceProperty }
+                [string]CallInstanceMethod() { return $this.InstanceMethod() }
+
+                [string]GetVirtualProperty1() { return $this.VirtualProperty1 }
+                [string]SetVirtualProperty1([string]$value) { $this.VirtualProperty1 = $value; return $this.VirtualProperty1 }
+                [string]CallVirtualMethod1() { return $this.VirtualMethod1() }
+
+                [string]$VirtualProperty2
+                [string]VirtualMethod2() { return 'C2_VirtualMethod2' }
+                # Note: Overriding a virtual property in a derived PowerShell class prevents access to the
+                #       base property via simple typecast ([base]$this).VirtualProperty2.
+                [string]GetVirtualProperty2() { return $this.VirtualProperty2 }
+                [string]SetVirtualProperty2([string]$value) { $this.VirtualProperty2 = $value; return $this.VirtualProperty2 }
+                [string]CallVirtualMethod2Base() { return ([C1ProtectedInternal]$this).VirtualMethod2() }
+                [string]CallVirtualMethod2Derived() { return $this.VirtualMethod2() }
+
+                [string]GetInstanceMemberDynamic([string]$name) { return $this.$name }
+                [string]SetInstanceMemberDynamic([string]$name, [string]$value) { $this.$name = $value; return $this.$name }
+                [string]CallInstanceMemberDynamic([string]$name) { return $this.$name() }
+            }
+
+            [C2ProtectedInternal]
+'@
+
+        Add-Type -TypeDefinition $c1DefinitionProtectedInternal
+        Add-Type -TypeDefinition (($c1DefinitionProtectedInternal -creplace 'C1ProtectedInternal', 'C1Protected') -creplace 'protected internal', 'protected')
+
+        $testCases = @(
+            @{ accessType = 'protected'; derivedType = Invoke-Expression ($c2DefinitionProtectedInternal -creplace 'ProtectedInternal', 'Protected') }
+            @{ accessType = 'protected internal'; derivedType = Invoke-Expression $c2DefinitionProtectedInternal }
+        )
+    }
+
+    AfterAll {
+        Set-StrictMode -Off
+    }
+
+    Context 'Derived class can access instance base class members' {
+
+        It 'can call protected internal .NET method Object.MemberwiseClone()' {
+            class CNetMethod {
+                [string]$Foo
+                [object]CloneIt() { return $this.MemberwiseClone() }
+            }
+            $c1 = [CNetMethod]::new()
+            $c1.Foo = 'bar'
+            $c2 = $c1.CloneIt()
+            $c2.Foo | Should -Be 'bar'
+        }
+
+        It 'can call <accessType> base ctor' -TestCases $testCases {
+            param($derivedType)
+            $derivedType::new('foo').CtorUsed | Should -Be 'C1_ctor_1args:foo'
+        }
+
+        It 'can access <accessType> base field' -TestCases $testCases {
+            param($derivedType)
+            $c2 = $derivedType::new()
+            $c2.GetInstanceField() | Should -Be 'C1_InstanceField'
+            $c2.SetInstanceField('foo_InstanceField') | Should -Be 'foo_InstanceField'
+        }
+
+        It 'can access <accessType> base property' -TestCases $testCases {
+            param($derivedType)
+            $c2 = $derivedType::new()
+            $c2.GetInstanceProperty() | Should -Be 'C1_InstanceProperty'
+            $c2.SetInstanceProperty('foo_InstanceProperty') | Should -Be 'foo_InstanceProperty'
+        }
+
+        It 'can call <accessType> base method' -TestCases $testCases {
+            param($derivedType)
+            $derivedType::new().CallInstanceMethod() | Should -Be 'C1_InstanceMethod'
+        }
+
+        It 'can access <accessType> virtual base property' -TestCases $testCases {
+            param($derivedType)
+            $c2 = $derivedType::new()
+            $c2.GetVirtualProperty1() | Should -Be 'C1_VirtualProperty1'
+            $c2.SetVirtualProperty1('foo_VirtualProperty1') | Should -Be 'foo_VirtualProperty1'
+        }
+
+        It 'can call <accessType> virtual base method' -TestCases $testCases {
+            param($derivedType)
+            $derivedType::new().CallVirtualMethod1() | Should -Be 'C1_VirtualMethod1'
+        }
+    }
+
+    Context 'Derived class can override virtual base class members' {
+
+        It 'can override <accessType> virtual base property' -TestCases $testCases {
+            param($derivedType)
+            $c2 = $derivedType::new()
+            $c2.GetVirtualProperty2() | Should -Be 'C2_VirtualProperty2'
+            $c2.SetVirtualProperty2('foo_VirtualProperty2') | Should -Be 'foo_VirtualProperty2'
+        }
+
+        It 'can override <accessType> virtual base method' -TestCases $testCases {
+            param($derivedType)
+            $c2 = $derivedType::new()
+            $c2.CallVirtualMethod2Base() | Should -Be 'C1_VirtualMethod2'
+            $c2.CallVirtualMethod2Derived() | Should -Be 'C2_VirtualMethod2'
+        }
+    }
+
+    Context 'Derived class can access instance base class members dynamically' {
+
+        It 'can access <accessType> base fields and properties' -TestCases $testCases {
+            param($derivedType)
+            $c2 = $derivedType::new()
+            $c2.GetInstanceMemberDynamic('InstanceField') | Should -Be 'C1_InstanceField'
+            $c2.GetInstanceMemberDynamic('InstanceProperty') | Should -Be 'C1_InstanceProperty'
+            $c2.GetInstanceMemberDynamic('VirtualProperty1') | Should -Be 'C1_VirtualProperty1'
+            $c2.SetInstanceMemberDynamic('InstanceField', 'foo1') | Should -Be 'foo1'
+            $c2.SetInstanceMemberDynamic('InstanceProperty', 'foo2') | Should -Be 'foo2'
+            $c2.SetInstanceMemberDynamic('VirtualProperty1', 'foo3') | Should -Be 'foo3'
+        }
+
+        It 'can call <accessType> base methods' -TestCases $testCases {
+            param($derivedType)
+            $c2 = $derivedType::new()
+            $c2.CallInstanceMemberDynamic('InstanceMethod') | Should -Be 'C1_InstanceMethod'
+            $c2.CallInstanceMemberDynamic('VirtualMethod1') | Should -Be 'C1_VirtualMethod1'
+        }
+    }
+
+    Context 'Base class members are not accessible outside class scope' {
+
+        BeforeAll {
+            $instanceTest = {
+                $c2 = $derivedType::new()
+                { $null = $c2.InstanceField } | Should -Throw -ErrorId 'PropertyNotFoundStrict'
+                { $null = $c2.InstanceProperty } | Should -Throw -ErrorId 'PropertyNotFoundStrict'
+                { $null = $c2.VirtualProperty1 } | Should -Throw -ErrorId 'PropertyNotFoundStrict'
+                { $c2.InstanceField = 'foo' } | Should -Throw -ErrorId 'PropertyAssignmentException'
+                { $c2.InstanceProperty = 'foo' } | Should -Throw -ErrorId 'PropertyAssignmentException'
+                { $c2.VirtualProperty1 = 'foo' } | Should -Throw -ErrorId 'PropertyAssignmentException'
+                { $derivedType::new().InstanceMethod() } | Should -Throw -ErrorId 'MethodNotFound'
+                { $derivedType::new().VirtualMethod1() } | Should -Throw -ErrorId 'MethodNotFound'
+                foreach ($name in @('InstanceField', 'InstanceProperty', 'VirtualProperty1')) {
+                    { $null = $c2.$name } | Should -Throw -ErrorId 'PropertyNotFoundStrict'
+                    { $c2.$name = 'foo' } | Should -Throw -ErrorId 'PropertyAssignmentException'
+                }
+                foreach ($name in @('InstanceMethod', 'VirtualMethod1')) {
+                    { $c2.$name() } | Should -Throw -ErrorId 'MethodNotFound'
+                }
+            }
+            $c3UnrelatedType = Invoke-Expression @"
+                class C3Unrelated {
+                    [void]RunInstanceTest([type]`$derivedType) { $instanceTest }
+                }
+                [C3Unrelated]
+"@
+            $negativeTestCases = $testCases.ForEach({
+                    $item = $_.Clone()
+                    $item['scopeType'] = 'null scope'
+                    $item['classScope'] = $null
+                    $item
+                    $item = $_.Clone()
+                    $item['scopeType'] = 'unrelated class scope'
+                    $item['classScope'] = $c3UnrelatedType
+                    $item
+                })
+        }
+
+        It 'cannot access <accessType> instance base members in <scopeType>' -TestCases $negativeTestCases {
+            param($derivedType, $classScope)
+            if ($null -eq $classScope) {
+                $instanceTest.Invoke()
+            }
+            else {
+                $c3 = $classScope::new()
+                $c3.RunInstanceTest($derivedType)
+            }
+        }
+    }
+}