static DmdType?GetEnumerableType(DmdType type)
{
if (type.IsArray || type == type.AppDomain.System_String)
{
return(null);
}
bool foundEnumerableType = false;
var enumerableType = type.AppDomain.System_Collections_IEnumerable;
var enumerableOfTType = type.AppDomain.System_Collections_Generic_IEnumerable_T;
switch (GetEnumerableTypeKind(type, enumerableType, enumerableOfTType))
{
case EnumerableTypeKind.Enumerable:
foundEnumerableType = true;
break;
case EnumerableTypeKind.EnumerableOfT:
return(type);
}
foreach (var iface in type.GetInterfaces())
{
switch (GetEnumerableTypeKind(iface, enumerableType, enumerableOfTType))
{
case EnumerableTypeKind.Enumerable:
foundEnumerableType = true;
break;
case EnumerableTypeKind.EnumerableOfT:
return(iface);
}
}
return(foundEnumerableType ? enumerableType : null);
}
static bool CheckIsDynamicViewType(DmdType type)
{
// Windows Runtime types aren't supported
if (type.IsWindowsRuntime)
{
return(false);
}
// Microsoft.CSharp.RuntimeBinder.DynamicMetaObjectProviderDebugView supports COM objects
if (type.CanCastTo(type.AppDomain.GetWellKnownType(DmdWellKnownType.System___ComObject, isOptional: true)))
{
return(true);
}
// Microsoft.CSharp.RuntimeBinder.DynamicMetaObjectProviderDebugView supports IDynamicMetaObjectProvider.
// This type is defined in Microsoft.CSharp which isn't always loaded. That's the reason we don't
// use a DmdWellKnownType, since when searching for one, the code will check every loaded assembly
// until the type is found, forcing all lazy-loaded metadata to be loaded. Most of the time it would
// fail, and thus load all metadata. It's a problem when debugging programs with 100+ loaded assemblies.
foreach (var iface in type.GetInterfaces())
{
if (iface.DeclaringType is null && iface.MetadataNamespace == "System.Dynamic" && iface.MetadataName == "IDynamicMetaObjectProvider")
{
return(true);
}
}
return(false);
}