internal static RuntimeType TryResolve(this ReflectionDomain reflectionDomain, MetadataReader reader, Handle typeDefRefOrSpec, TypeContext typeContext, ref Exception exception) { HandleType handleType = typeDefRefOrSpec.HandleType; if (handleType == HandleType.TypeDefinition) { return(reflectionDomain.ResolveTypeDefinition(reader, typeDefRefOrSpec.ToTypeDefinitionHandle(reader))); } else if (handleType == HandleType.TypeReference) { return(reflectionDomain.TryResolveTypeReference(reader, typeDefRefOrSpec.ToTypeReferenceHandle(reader), ref exception)); } else if (handleType == HandleType.TypeSpecification) { return(reflectionDomain.TryResolveTypeSignature(reader, typeDefRefOrSpec.ToTypeSpecificationHandle(reader), typeContext, ref exception)); } else { throw new BadImageFormatException(); // Expected TypeRef, Def or Spec. } }
// // Main routine to parse a metadata type specification signature. // private static RuntimeType TryResolveTypeSignature(this ReflectionDomain reflectionDomain, MetadataReader reader, TypeSpecificationHandle typeSpecHandle, TypeContext typeContext, ref Exception exception) { Handle typeHandle = typeSpecHandle.GetTypeSpecification(reader).Signature; switch (typeHandle.HandleType) { case HandleType.ArraySignature: { ArraySignature sig = typeHandle.ToArraySignatureHandle(reader).GetArraySignature(reader); int rank = sig.Rank; if (rank <= 0) { throw new BadImageFormatException(); // Bad rank. } RuntimeType elementType = reflectionDomain.TryResolve(reader, sig.ElementType, typeContext, ref exception); if (elementType == null) { return(null); } return(ReflectionCoreNonPortable.GetMultiDimArrayType(elementType, rank)); } case HandleType.ByReferenceSignature: { ByReferenceSignature sig = typeHandle.ToByReferenceSignatureHandle(reader).GetByReferenceSignature(reader); RuntimeType targetType = reflectionDomain.TryResolve(reader, sig.Type, typeContext, ref exception); if (targetType == null) { return(null); } return(ReflectionCoreNonPortable.GetByRefType(targetType)); } case HandleType.MethodTypeVariableSignature: { MethodTypeVariableSignature sig = typeHandle.ToMethodTypeVariableSignatureHandle(reader).GetMethodTypeVariableSignature(reader); return(typeContext.GenericMethodArguments[sig.Number]); } case HandleType.PointerSignature: { PointerSignature sig = typeHandle.ToPointerSignatureHandle(reader).GetPointerSignature(reader); RuntimeType targetType = reflectionDomain.TryResolve(reader, sig.Type, typeContext, ref exception); if (targetType == null) { return(null); } return(ReflectionCoreNonPortable.GetPointerType(targetType)); } case HandleType.SZArraySignature: { SZArraySignature sig = typeHandle.ToSZArraySignatureHandle(reader).GetSZArraySignature(reader); RuntimeType elementType = reflectionDomain.TryResolve(reader, sig.ElementType, typeContext, ref exception); if (elementType == null) { return(null); } return(ReflectionCoreNonPortable.GetArrayType(elementType)); } case HandleType.TypeDefinition: { return(reflectionDomain.ResolveTypeDefinition(reader, typeHandle.ToTypeDefinitionHandle(reader))); } case HandleType.TypeInstantiationSignature: { TypeInstantiationSignature sig = typeHandle.ToTypeInstantiationSignatureHandle(reader).GetTypeInstantiationSignature(reader); RuntimeType genericTypeDefinition = reflectionDomain.TryResolve(reader, sig.GenericType, typeContext, ref exception); if (genericTypeDefinition == null) { return(null); } LowLevelList <RuntimeType> genericTypeArguments = new LowLevelList <RuntimeType>(); foreach (Handle genericTypeArgumentHandle in sig.GenericTypeArguments) { RuntimeType genericTypeArgument = reflectionDomain.TryResolve(reader, genericTypeArgumentHandle, typeContext, ref exception); if (genericTypeArgument == null) { return(null); } genericTypeArguments.Add(genericTypeArgument); } return(ReflectionCoreNonPortable.GetConstructedGenericType(genericTypeDefinition, genericTypeArguments.ToArray())); } case HandleType.TypeReference: { return(reflectionDomain.TryResolveTypeReference(reader, typeHandle.ToTypeReferenceHandle(reader), ref exception)); } case HandleType.TypeVariableSignature: { TypeVariableSignature sig = typeHandle.ToTypeVariableSignatureHandle(reader).GetTypeVariableSignature(reader); return(typeContext.GenericTypeArguments[sig.Number]); } default: throw new NotSupportedException(); // Unexpected Type signature type. } }
// // Main routine to resolve a typeReference. // private static RuntimeType TryResolveTypeReference(this ReflectionDomain reflectionDomain, MetadataReader reader, TypeReferenceHandle typeReferenceHandle, ref Exception exception) { { ExecutionDomain executionDomain = reflectionDomain as ExecutionDomain; if (executionDomain != null) { RuntimeTypeHandle resolvedRuntimeTypeHandle; if (executionDomain.ExecutionEnvironment.TryGetNamedTypeForTypeReference(reader, typeReferenceHandle, out resolvedRuntimeTypeHandle)) { return(ReflectionCoreNonPortable.GetTypeForRuntimeTypeHandle(resolvedRuntimeTypeHandle)); } } } TypeReference typeReference = typeReferenceHandle.GetTypeReference(reader); String name = typeReference.TypeName.GetString(reader); Handle parent = typeReference.ParentNamespaceOrType; HandleType parentType = parent.HandleType; TypeInfo outerTypeInfo = null; // Check if this is a reference to a nested type. if (parentType == HandleType.TypeDefinition) { outerTypeInfo = RuntimeNamedTypeInfo.GetRuntimeNamedTypeInfo(reader, parent.ToTypeDefinitionHandle(reader)); } else if (parentType == HandleType.TypeReference) { RuntimeType outerType = reflectionDomain.TryResolveTypeReference(reader, parent.ToTypeReferenceHandle(reader), ref exception); if (outerType == null) { return(null); } outerTypeInfo = outerType.GetTypeInfo(); // Since we got to outerType via a metadata reference, we're assured GetTypeInfo() won't throw a MissingMetadataException. } if (outerTypeInfo != null) { // It was a nested type. We've already resolved the containing type recursively - just find the nested among its direct children. TypeInfo resolvedTypeInfo = outerTypeInfo.GetDeclaredNestedType(name); if (resolvedTypeInfo == null) { exception = reflectionDomain.CreateMissingMetadataException(outerTypeInfo, name); return(null); } return((RuntimeType)(resolvedTypeInfo.AsType())); } // If we got here, the typeReference was to a non-nested type. if (parentType == HandleType.NamespaceReference) { AssemblyQualifiedTypeName assemblyQualifiedTypeName = parent.ToNamespaceReferenceHandle(reader).ToAssemblyQualifiedTypeName(name, reader); RuntimeType runtimeType; exception = assemblyQualifiedTypeName.TryResolve(reflectionDomain, null, /*ignoreCase: */ false, out runtimeType); if (exception != null) { return(null); } return(runtimeType); } throw new BadImageFormatException(); // Expected TypeReference parent to be typeRef, typeDef or namespaceRef. }