internal static bool IsAssignableFromHelper(Type current, Type target)
{
if (target == null)
{
return(false);
}
if (current.Equals(target))
{
return(true);
}
if (target.IsSubclassOf(current))
{
return(true);
}
Type[] interfaces = target.GetInterfaces();
for (int i = 0; i < (int)interfaces.Length; i++)
{
if (interfaces[i].Equals(current))
{
return(true);
}
if (current.IsAssignableFrom(interfaces[i]))
{
return(true);
}
}
if (target.IsGenericParameter)
{
Type[] genericParameterConstraints = target.GetGenericParameterConstraints();
for (int j = 0; j < (int)genericParameterConstraints.Length; j++)
{
if (MetadataOnlyTypeDef.IsAssignableFromHelper(current, genericParameterConstraints[j]))
{
return(true);
}
}
}
ITypeUniverse typeUniverse = Helpers.Universe(current);
if (typeUniverse == null || !current.Equals(typeUniverse.GetTypeXFromName("System.Object")))
{
return(false);
}
if (target.IsPointer || target.IsInterface)
{
return(true);
}
return(target.IsArray);
}
public override bool IsAssignableFrom(Type c)
{
if (c == null)
{
return(false);
}
if (base.IsPointer && c.IsPointer || base.IsByRef && c.IsByRef)
{
Type elementType = c.GetElementType();
if (this.m_type.IsAssignableFrom(elementType) && !elementType.IsValueType)
{
return(true);
}
}
return(MetadataOnlyTypeDef.IsAssignableFromHelper(this, c));
}
public override bool IsAssignableFrom(Type c)
{
if (c == null)
{
return(false);
}
if (!c.IsArray || c.GetArrayRank() != 1 || !(c is MetadataOnlyVectorType))
{
return(MetadataOnlyTypeDef.IsAssignableFromHelper(this, c));
}
Type elementType = c.GetElementType();
if (elementType.IsValueType)
{
return(this.GetElementType().Equals(elementType));
}
return(this.GetElementType().IsAssignableFrom(elementType));
}
public override bool IsAssignableFrom(Type c)
{
return(MetadataOnlyTypeDef.IsAssignableFromHelper(this, c));
}