public IType ResolveType(EntityHandle typeRefDefSpec, GenericContext context, TypeSystemOptions customOptions, CustomAttributeHandleCollection?typeAttributes = null, Nullability nullableContext = Nullability.Oblivious)
{
if (typeRefDefSpec.IsNil)
{
return(SpecialType.UnknownType);
}
IType ty;
switch (typeRefDefSpec.Kind)
{
case HandleKind.TypeDefinition:
ty = TypeProvider.GetTypeFromDefinition(metadata, (TypeDefinitionHandle)typeRefDefSpec, 0);
break;
case HandleKind.TypeReference:
ty = TypeProvider.GetTypeFromReference(metadata, (TypeReferenceHandle)typeRefDefSpec, 0);
break;
case HandleKind.TypeSpecification:
var typeSpec = metadata.GetTypeSpecification((TypeSpecificationHandle)typeRefDefSpec);
ty = typeSpec.DecodeSignature(TypeProvider, context);
break;
case HandleKind.ExportedType:
return(ResolveForwardedType(metadata.GetExportedType((ExportedTypeHandle)typeRefDefSpec)));
default:
throw new BadImageFormatException("Not a type handle");
}
ty = ApplyAttributeTypeVisitor.ApplyAttributesToType(ty, Compilation, typeAttributes, metadata, customOptions, nullableContext);
return(ty);
}
IType ResolveDeclaringType(EntityHandle declaringTypeReference, GenericContext context)
{
// resolve without substituting dynamic/tuple types
var ty = ResolveType(declaringTypeReference, context,
options & ~(TypeSystemOptions.Dynamic | TypeSystemOptions.Tuple | TypeSystemOptions.NullabilityAnnotations));
// but substitute tuple types in type arguments:
ty = ApplyAttributeTypeVisitor.ApplyAttributesToType(ty, Compilation, null, metadata, options, Nullability.Oblivious, typeChildrenOnly: true);
return(ty);
}
IType IntroduceTupleTypes(IType ty)
{
// run ApplyAttributeTypeVisitor without attributes, in order to introduce tuple types
return(ApplyAttributeTypeVisitor.ApplyAttributesToType(ty, Compilation, null, metadata, options, Nullability.Oblivious));
}
public static IType ApplyAttributesToType(
IType inputType,
ICompilation compilation,
SRM.CustomAttributeHandleCollection?attributes,
SRM.MetadataReader metadata,
TypeSystemOptions options,
bool typeChildrenOnly = false)
{
bool useDynamicType = (options & TypeSystemOptions.Dynamic) != 0;
bool useTupleTypes = (options & TypeSystemOptions.Tuple) != 0;
bool hasDynamicAttribute = false;
bool[] dynamicAttributeData = null;
string[] tupleElementNames = null;
if (attributes != null && (useDynamicType || useTupleTypes))
{
foreach (var attrHandle in attributes.Value)
{
var attr = metadata.GetCustomAttribute(attrHandle);
var attrType = attr.GetAttributeType(metadata);
if (useDynamicType && attrType.IsKnownType(metadata, KnownAttribute.Dynamic))
{
hasDynamicAttribute = true;
var ctor = attr.DecodeValue(Metadata.MetadataExtensions.minimalCorlibTypeProvider);
if (ctor.FixedArguments.Length == 1)
{
var arg = ctor.FixedArguments[0];
if (arg.Value is ImmutableArray <SRM.CustomAttributeTypedArgument <IType> > values &&
values.All(v => v.Value is bool))
{
dynamicAttributeData = values.SelectArray(v => (bool)v.Value);
}
}
}
else if (useTupleTypes && attrType.IsKnownType(metadata, KnownAttribute.TupleElementNames))
{
var ctor = attr.DecodeValue(Metadata.MetadataExtensions.minimalCorlibTypeProvider);
if (ctor.FixedArguments.Length == 1)
{
var arg = ctor.FixedArguments[0];
if (arg.Value is ImmutableArray <SRM.CustomAttributeTypedArgument <IType> > values &&
values.All(v => v.Value is string || v.Value == null))
{
tupleElementNames = values.SelectArray(v => (string)v.Value);
}
}
}
}
}
if (hasDynamicAttribute || (options & (TypeSystemOptions.Tuple | TypeSystemOptions.KeepModifiers)) != TypeSystemOptions.KeepModifiers)
{
var visitor = new ApplyAttributeTypeVisitor(
compilation, hasDynamicAttribute, dynamicAttributeData, options, tupleElementNames
);
if (typeChildrenOnly)
{
return(inputType.VisitChildren(visitor));
}
else
{
return(inputType.AcceptVisitor(visitor));
}
}
else
{
return(inputType);
}
}