private static bool IsEqualCustomAttributeName(CustomAttributeHandle attributeHandle, MetadataReader metadataReader,
string attributeNamespace, string attributeName)
{
StringHandle namespaceHandle, nameHandle;
if (!metadataReader.GetAttributeNamespaceAndName(attributeHandle, out namespaceHandle, out nameHandle))
{
return(false);
}
return(metadataReader.StringComparer.Equals(namespaceHandle, attributeNamespace) &&
metadataReader.StringComparer.Equals(nameHandle, attributeName));
}
public static CustomAttributeHandle GetCustomAttributeHandle(this MetadataReader metadataReader, CustomAttributeHandleCollection customAttributes,
string attributeNamespace, string attributeName)
{
foreach (var attributeHandle in customAttributes)
{
StringHandle namespaceHandle, nameHandle;
if (!metadataReader.GetAttributeNamespaceAndName(attributeHandle, out namespaceHandle, out nameHandle))
{
continue;
}
if (metadataReader.StringComparer.Equals(namespaceHandle, attributeNamespace) &&
metadataReader.StringComparer.Equals(nameHandle, attributeName))
{
return(attributeHandle);
}
}
return(default(CustomAttributeHandle));
}
public static bool HasCustomAttribute(this MetadataReader metadataReader, CustomAttributeHandleCollection customAttributes,
string attributeNamespace, string attributeName)
{
foreach (var attributeHandle in customAttributes)
{
ConstantStringValueHandle nameHandle;
string namespaceName;
if (!metadataReader.GetAttributeNamespaceAndName(attributeHandle, out namespaceName, out nameHandle))
{
continue;
}
if (namespaceName.Equals(attributeNamespace) &&
nameHandle.StringEquals(attributeName, metadataReader))
{
return(true);
}
}
return(false);
}
/// <summary>
/// Gets a value indicating whether '<paramref name="module"/>' is a framework assembly.
/// </summary>
public static bool IsFrameworkAssembly(EcmaModule module)
{
MetadataReader reader = module.MetadataReader;
// We look for [assembly:AssemblyMetadata(".NETFrameworkAssembly", "")]
foreach (CustomAttributeHandle attributeHandle in reader.GetAssemblyDefinition().GetCustomAttributes())
{
if (!reader.GetAttributeNamespaceAndName(attributeHandle, out StringHandle namespaceHandle, out StringHandle nameHandle))
{
continue;
}
if (!reader.StringComparer.Equals(namespaceHandle, "System.Reflection") ||
!reader.StringComparer.Equals(nameHandle, "AssemblyMetadataAttribute"))
{
continue;
}
var attributeTypeProvider = new CustomAttributeTypeProvider(module);
CustomAttribute attribute = reader.GetCustomAttribute(attributeHandle);
CustomAttributeValue <TypeDesc> decodedAttribute = attribute.DecodeValue(attributeTypeProvider);
if (decodedAttribute.FixedArguments.Length != 2)
{
continue;
}
if (decodedAttribute.FixedArguments[0].Value is string s && s == ".NETFrameworkAssembly")
{
return(true);
}
}
return(false);
}
protected override TypeFlags ComputeTypeFlags(TypeFlags mask)
{
TypeFlags flags = 0;
if ((mask & TypeFlags.CategoryMask) != 0)
{
TypeDesc baseType = this.BaseType;
if (baseType != null && baseType.IsWellKnownType(WellKnownType.ValueType))
{
flags |= TypeFlags.ValueType;
}
else
if (baseType != null && baseType.IsWellKnownType(WellKnownType.Enum))
{
flags |= TypeFlags.Enum;
}
else
{
if ((_typeDefinition.Attributes & TypeAttributes.Interface) != 0)
flags |= TypeFlags.Interface;
else
flags |= TypeFlags.Class;
}
// All other cases are handled during TypeSystemContext intitialization
}
if ((mask & TypeFlags.HasGenericVarianceComputed) != 0)
{
flags |= TypeFlags.HasGenericVarianceComputed;
foreach (GenericParameterDesc genericParam in Instantiation)
{
if (genericParam.Variance != GenericVariance.None)
{
flags |= TypeFlags.HasGenericVariance;
break;
}
}
}
if ((mask & TypeFlags.HasFinalizerComputed) != 0)
{
flags |= TypeFlags.HasFinalizerComputed;
if (GetFinalizer() != null)
flags |= TypeFlags.HasFinalizer;
}
if ((mask & TypeFlags.AttributeCacheComputed) != 0)
{
MetadataReader reader = MetadataReader;
MetadataStringComparer stringComparer = reader.StringComparer;
bool isValueType = IsValueType;
flags |= TypeFlags.AttributeCacheComputed;
foreach (CustomAttributeHandle attributeHandle in _typeDefinition.GetCustomAttributes())
{
if (MetadataReader.GetAttributeNamespaceAndName(attributeHandle, out StringHandle namespaceHandle, out StringHandle nameHandle))
{
if (isValueType &&
stringComparer.Equals(nameHandle, "IsByRefLikeAttribute") &&
stringComparer.Equals(namespaceHandle, "System.Runtime.CompilerServices"))
flags |= TypeFlags.IsByRefLike;
if (stringComparer.Equals(nameHandle, "IntrinsicAttribute") &&
stringComparer.Equals(namespaceHandle, "System.Runtime.CompilerServices"))
flags |= TypeFlags.IsIntrinsic;
}
}
}
return flags;
}
