Add 'EnableDefaultCustomTypeMappings' switch

nuget/Microsoft.Windows.CsWinRT.targets

@@ -234,10 +234,11 @@ $(CsWinRTInternalProjection)
  <Import Project="$(MSBuildThisFileDirectory)Microsoft.Windows.CsWinRT.Authoring.targets" Condition="'$(CsWinRTComponent)' == 'true'"/>
  <Import Project="$(MSBuildThisFileDirectory)Microsoft.Windows.CsWinRT.IIDOptimizer.targets" Condition="'$(CsWinRTIIDOptimizerOptOut)' != 'true'"/>
 
- <!-- Default values for all custom CsWinRT runtimem feature switches -->
+ <!-- Default values for all custom CsWinRT runtime feature switches -->
  <PropertyGroup>
  <CsWinRTEnableDynamicObjectsSupport Condition="'$(CsWinRTEnableDynamicObjectsSupport)' == ''">true</CsWinRTEnableDynamicObjectsSupport>
  <CsWinRTUseExceptionResourceKeys Condition="'$(CsWinRTUseExceptionResourceKeys)' == ''">false</CsWinRTUseExceptionResourceKeys>
+ <CsWinRTEnableDefaultCustomTypeMappings Condition="'$(CsWinRTEnableDefaultCustomTypeMappings)' == ''">true</CsWinRTEnableDefaultCustomTypeMappings>
  </PropertyGroup>
 
  <!--
@@ -255,6 +256,11 @@ $(CsWinRTInternalProjection)
  <RuntimeHostConfigurationOption Include="CSWINRT_USE_EXCEPTION_RESOURCE_KEYS"
  Value="$(CsWinRTUseExceptionResourceKeys)"
  Trim="true" />
+
+ <!-- CSWINRT_ENABLE_DEFAULT_CUSTOM_TYPE_MAPPINGS switch -->
+ <RuntimeHostConfigurationOption Include="CSWINRT_ENABLE_DEFAULT_CUSTOM_TYPE_MAPPINGS"
+ Value="$(CsWinRTEnableDefaultCustomTypeMappings)"
+ Trim="true" />
  </ItemGroup>
 
 </Project>

src/WinRT.Runtime/ApiCompatBaseline.txt

@@ -15,4 +15,5 @@ CannotMakeMemberNonVirtual : Member 'public System.Int32 WinRT.IObjectReference.
 MembersMustExist : Member 'protected System.Boolean System.Boolean WinRT.IObjectReference.disposed' does not exist in the implementation but it does exist in the contract.
 MembersMustExist : Member 'protected void WinRT.IObjectReference.Dispose(System.Boolean)' does not exist in the implementation but it does exist in the contract.
 CannotChangeAttribute : Attribute 'System.Diagnostics.CodeAnalysis.UnconditionalSuppressMessageAttribute' on 'ABI.System.Type.FromAbi(ABI.System.Type)' changed from '[UnconditionalSuppressMessageAttribute("ReflectionAnalysis", "IL2026:RequiresUnreferencedCode", Justification="Any types which are trimmed are not used by managed user code and there is fallback logic to handle that.")]' in the contract to '[UnconditionalSuppressMessageAttribute("ReflectionAnalysis", "IL2057", Justification="Any types which are trimmed are not used by managed user code and there is fallback logic to handle that.")]' in the implementation.
-Total Issues: 16
+MembersMustExist : Member 'public void WinRT.Projections.RegisterCustomAbiTypeMapping(System.Type, System.Type, System.String, System.Boolean)' does not exist in the implementation but it does exist in the contract.
+Total Issues: 17

src/WinRT.Runtime/Configuration/FeatureSwitches.cs

@@ -31,6 +31,11 @@ internal static class FeatureSwitches
  /// </summary>
  private const string UseExceptionResourceKeysPropertyName = "CSWINRT_USE_EXCEPTION_RESOURCE_KEYS";
 
+ /// <summary>
+ /// The configuration property name for <see cref="EnableDefaultCustomTypeMappings"/>.
+ /// </summary>
+ private const string EnableDefaultCustomTypeMappingsPropertyName = "CSWINRT_ENABLE_DEFAULT_CUSTOM_TYPE_MAPPINGS";
+
  /// <summary>
  /// The backing field for <see cref="IsDynamicObjectsSupportEnabled"/>.
  /// </summary>
@@ -41,6 +46,11 @@ internal static class FeatureSwitches
  /// </summary>
  private static int _useExceptionResourceKeys;
 
+ /// <summary>
+ /// The backing field for <see cref="EnableDefaultCustomTypeMappings"/>.
+ /// </summary>
+ private static int _enableDefaultCustomTypeMappings;
+
  /// <summary>
  /// Gets a value indicating whether or not projections support for dynamic objects is enabled (defaults to <see langword="true"/>).
  /// </summary>
@@ -59,6 +69,15 @@ public static bool UseExceptionResourceKeys
  get => GetConfigurationValue(UseExceptionResourceKeysPropertyName, ref _useExceptionResourceKeys);
  }
 
+ /// <summary>
+ /// Gets a value indicating whether or not <see cref="Projections"/> should initialize all default type mappings automatically (defaults to <see langword="true"/>).
+ /// </summary>
+ public static bool EnableDefaultCustomTypeMappings
+ {
+ [MethodImpl(MethodImplOptions.AggressiveInlining)]
+ get => GetConfigurationValue(EnableDefaultCustomTypeMappingsPropertyName, ref _enableDefaultCustomTypeMappings);
+ }
+
  /// <summary>
  /// Gets a configuration value for a specified property.
  /// </summary>

src/WinRT.Runtime/Configuration/ILLink.Substitutions.xml

@@ -9,6 +9,10 @@
  <!-- CSWINRT_USE_EXCEPTION_RESOURCE_KEYS switch -->
  <method signature="System.Boolean get_UseExceptionResourceKeys()" body="stub" value="false" feature="CSWINRT_USE_EXCEPTION_RESOURCE_KEYS" featurevalue="false"/>
  <method signature="System.Boolean get_UseExceptionResourceKeys()" body="stub" value="true" feature="CSWINRT_USE_EXCEPTION_RESOURCE_KEYS" featurevalue="true"/>
+
+ <!-- CSWINRT_ENABLE_DEFAULT_CUSTOM_TYPE_MAPPINGS switch -->
+ <method signature="System.Boolean get_EnableDefaultCustomTypeMappings()" body="stub" value="false" feature="CSWINRT_ENABLE_DEFAULT_CUSTOM_TYPE_MAPPINGS" featurevalue="false"/>
+ <method signature="System.Boolean get_EnableDefaultCustomTypeMappings()" body="stub" value="true" feature="CSWINRT_ENABLE_DEFAULT_CUSTOM_TYPE_MAPPINGS" featurevalue="true"/>
  </type>
  </assembly>
 

src/WinRT.Runtime/MatchingRefApiCompatBaseline.txt

@@ -139,4 +139,63 @@ MembersMustExist : Member 'public WinRT.ObjectReference<T> WinRT.ObjectReference
 TypesMustExist : Type 'WinRT.ActivationFactory' does not exist in the reference but it does exist in the implementation.
 CannotChangeAttribute : Attribute 'System.Diagnostics.CodeAnalysis.UnconditionalSuppressMessageAttribute' on 'ABI.System.Type.FromAbi(ABI.System.Type)' changed from '[UnconditionalSuppressMessageAttribute("ReflectionAnalysis", "IL2057", Justification="Any types which are trimmed are not used by managed user code and there is fallback logic to handle that.")]' in the implementation to '[UnconditionalSuppressMessageAttribute("ReflectionAnalysis", "IL2026:RequiresUnreferencedCode", Justification="Any types which are trimmed are not used by managed user code and there is fallback logic to handle that.")]' in the reference.
 CannotRemoveAttribute : Attribute 'System.Diagnostics.CodeAnalysis.UnconditionalSuppressMessageAttribute' exists on 'WinRT.MarshalDelegate.FromAbi<T>(System.IntPtr)' in the implementation but not the reference.
-Total Issues: 140
+MembersMustExist : Member 'public void WinRT.Projections.RegisterDataErrorsChangedEventArgsMapping()' does not exist in the reference but it does exist in the implementation.
+MembersMustExist : Member 'public void WinRT.Projections.RegisterDateTimeOffsetMapping()' does not exist in the reference but it does exist in the implementation.
+MembersMustExist : Member 'public void WinRT.Projections.RegisterEventHandlerMapping()' does not exist in the reference but it does exist in the implementation.
+MembersMustExist : Member 'public void WinRT.Projections.RegisterEventHandlerOpenGenericMapping()' does not exist in the reference but it does exist in the implementation.
+MembersMustExist : Member 'public void WinRT.Projections.RegisterEventRegistrationTokenMapping()' does not exist in the reference but it does exist in the implementation.
+MembersMustExist : Member 'public void WinRT.Projections.RegisterExceptionMapping()' does not exist in the reference but it does exist in the implementation.
+MembersMustExist : Member 'public void WinRT.Projections.RegisterIBindableVectorMapping()' does not exist in the reference but it does exist in the implementation.
+MembersMustExist : Member 'public void WinRT.Projections.RegisterICollectionMapping()' does not exist in the reference but it does exist in the implementation.
+MembersMustExist : Member 'public void WinRT.Projections.RegisterICollectionOpenGenericMapping()' does not exist in the reference but it does exist in the implementation.
+MembersMustExist : Member 'public void WinRT.Projections.RegisterICommandMapping()' does not exist in the reference but it does exist in the implementation.
+MembersMustExist : Member 'public void WinRT.Projections.RegisterIDictionaryOpenGenericMapping()' does not exist in the reference but it does exist in the implementation.
+MembersMustExist : Member 'public void WinRT.Projections.RegisterIDisposableMapping()' does not exist in the reference but it does exist in the implementation.
+MembersMustExist : Member 'public void WinRT.Projections.RegisterIEnumerableMapping()' does not exist in the reference but it does exist in the implementation.
+MembersMustExist : Member 'public void WinRT.Projections.RegisterIEnumerableOpenGenericMapping()' does not exist in the reference but it does exist in the implementation.
+MembersMustExist : Member 'public void WinRT.Projections.RegisterIEnumeratorOpenGenericMapping()' does not exist in the reference but it does exist in the implementation.
+MembersMustExist : Member 'public void WinRT.Projections.RegisterIListMapping()' does not exist in the reference but it does exist in the implementation.
+MembersMustExist : Member 'public void WinRT.Projections.RegisterIListOpenGenericMapping()' does not exist in the reference but it does exist in the implementation.
+MembersMustExist : Member 'public void WinRT.Projections.RegisterIMapOpenGenericMapping()' does not exist in the reference but it does exist in the implementation.
+MembersMustExist : Member 'public void WinRT.Projections.RegisterIMapViewOpenGenericMapping()' does not exist in the reference but it does exist in the implementation.
+MembersMustExist : Member 'public void WinRT.Projections.RegisterINotifyCollectionChangedMapping()' does not exist in the reference but it does exist in the implementation.
+MembersMustExist : Member 'public void WinRT.Projections.RegisterINotifyDataErrorInfoMapping()' does not exist in the reference but it does exist in the implementation.
+MembersMustExist : Member 'public void WinRT.Projections.RegisterINotifyPropertyChangedMapping()' does not exist in the reference but it does exist in the implementation.
+MembersMustExist : Member 'public void WinRT.Projections.RegisterIReadOnlyCollectionOpenGenericMapping()' does not exist in the reference but it does exist in the implementation.
+MembersMustExist : Member 'public void WinRT.Projections.RegisterIReadOnlyDictionaryOpenGenericMapping()' does not exist in the reference but it does exist in the implementation.
+MembersMustExist : Member 'public void WinRT.Projections.RegisterIReadOnlyListOpenGenericMapping()' does not exist in the reference but it does exist in the implementation.
+MembersMustExist : Member 'public void WinRT.Projections.RegisterIServiceProviderMapping()' does not exist in the reference but it does exist in the implementation.
+MembersMustExist : Member 'public void WinRT.Projections.RegisterIVectorOpenGenericMapping()' does not exist in the reference but it does exist in the implementation.
+MembersMustExist : Member 'public void WinRT.Projections.RegisterIVectorViewOpenGenericMapping()' does not exist in the reference but it does exist in the implementation.
+MembersMustExist : Member 'public void WinRT.Projections.RegisterKeyValuePairOpenGenericMapping()' does not exist in the reference but it does exist in the implementation.
+MembersMustExist : Member 'public void WinRT.Projections.RegisterMatrix3x2Mapping()' does not exist in the reference but it does exist in the implementation.
+MembersMustExist : Member 'public void WinRT.Projections.RegisterMatrix4x4Mapping()' does not exist in the reference but it does exist in the implementation.
+MembersMustExist : Member 'public void WinRT.Projections.RegisterNotifyCollectionChangedActionMapping()' does not exist in the reference but it does exist in the implementation.
+MembersMustExist : Member 'public void WinRT.Projections.RegisterNotifyCollectionChangedEventArgsMapping()' does not exist in the reference but it does exist in the implementation.
+MembersMustExist : Member 'public void WinRT.Projections.RegisterNotifyCollectionChangedEventHandlerMapping()' does not exist in the reference but it does exist in the implementation.
+MembersMustExist : Member 'public void WinRT.Projections.RegisterNullableBoolMapping()' does not exist in the reference but it does exist in the implementation.
+MembersMustExist : Member 'public void WinRT.Projections.RegisterNullableByteMapping()' does not exist in the reference but it does exist in the implementation.
+MembersMustExist : Member 'public void WinRT.Projections.RegisterNullableCharMapping()' does not exist in the reference but it does exist in the implementation.
+MembersMustExist : Member 'public void WinRT.Projections.RegisterNullableDateTimeOffsetMapping()' does not exist in the reference but it does exist in the implementation.
+MembersMustExist : Member 'public void WinRT.Projections.RegisterNullableDoubleMapping()' does not exist in the reference but it does exist in the implementation.
+MembersMustExist : Member 'public void WinRT.Projections.RegisterNullableFloatMapping()' does not exist in the reference but it does exist in the implementation.
+MembersMustExist : Member 'public void WinRT.Projections.RegisterNullableGuidMapping()' does not exist in the reference but it does exist in the implementation.
+MembersMustExist : Member 'public void WinRT.Projections.RegisterNullableIntMapping()' does not exist in the reference but it does exist in the implementation.
+MembersMustExist : Member 'public void WinRT.Projections.RegisterNullableLongMapping()' does not exist in the reference but it does exist in the implementation.
+MembersMustExist : Member 'public void WinRT.Projections.RegisterNullableOpenGenericMapping()' does not exist in the reference but it does exist in the implementation.
+MembersMustExist : Member 'public void WinRT.Projections.RegisterNullableSByteMapping()' does not exist in the reference but it does exist in the implementation.
+MembersMustExist : Member 'public void WinRT.Projections.RegisterNullableShortMapping()' does not exist in the reference but it does exist in the implementation.
+MembersMustExist : Member 'public void WinRT.Projections.RegisterNullableTimeSpanMapping()' does not exist in the reference but it does exist in the implementation.
+MembersMustExist : Member 'public void WinRT.Projections.RegisterNullableUIntMapping()' does not exist in the reference but it does exist in the implementation.
+MembersMustExist : Member 'public void WinRT.Projections.RegisterNullableULongMapping()' does not exist in the reference but it does exist in the implementation.
+MembersMustExist : Member 'public void WinRT.Projections.RegisterNullableUShortMapping()' does not exist in the reference but it does exist in the implementation.
+MembersMustExist : Member 'public void WinRT.Projections.RegisterPlaneMapping()' does not exist in the reference but it does exist in the implementation.
+MembersMustExist : Member 'public void WinRT.Projections.RegisterPropertyChangedEventArgsMapping()' does not exist in the reference but it does exist in the implementation.
+MembersMustExist : Member 'public void WinRT.Projections.RegisterPropertyChangedEventHandlerMapping()' does not exist in the reference but it does exist in the implementation.
+MembersMustExist : Member 'public void WinRT.Projections.RegisterQuaternionMapping()' does not exist in the reference but it does exist in the implementation.
+MembersMustExist : Member 'public void WinRT.Projections.RegisterTimeSpanMapping()' does not exist in the reference but it does exist in the implementation.
+MembersMustExist : Member 'public void WinRT.Projections.RegisterUriMapping()' does not exist in the reference but it does exist in the implementation.
+MembersMustExist : Member 'public void WinRT.Projections.RegisterVector2Mapping()' does not exist in the reference but it does exist in the implementation.
+MembersMustExist : Member 'public void WinRT.Projections.RegisterVector3Mapping()' does not exist in the reference but it does exist in the implementation.
+MembersMustExist : Member 'public void WinRT.Projections.RegisterVector4Mapping()' does not exist in the reference but it does exist in the implementation. 
+Total Issues: 199