/// <summary>
/// Implementation of [] semantics for reflected types. This exists
/// both to implement the Array[int] syntax for creating arrays and
/// to support generic name overload resolution using [].
/// </summary>
public override IntPtr type_subscript(IntPtr idx)
{
// If this type is the Array type, the [<type>] means we need to
// construct and return an array type of the given element type.
if (type == typeof(Array))
{
if (Runtime.PyTuple_Check(idx))
{
return(Exceptions.RaiseTypeError("type expected"));
}
var c = GetManagedObject(idx) as ClassBase;
Type t = c != null ? c.type : Converter.GetTypeByAlias(idx);
if (t == null)
{
return(Exceptions.RaiseTypeError("type expected"));
}
Type a = t.MakeArrayType();
ClassBase o = ClassManager.GetClass(a);
Runtime.XIncref(o.pyHandle);
return(o.pyHandle);
}
// If there are generics in our namespace with the same base name
// as the current type, then [<type>] means the caller wants to
// bind the generic type matching the given type parameters.
Type[] types = Runtime.PythonArgsToTypeArray(idx);
if (types == null)
{
return(Exceptions.RaiseTypeError("type(s) expected"));
}
Type gtype = AssemblyManager.LookupType($"{type.FullName}`{types.Length}");
if (gtype != null)
{
var g = ClassManager.GetClass(gtype) as GenericType;
return(g.type_subscript(idx));
//Runtime.XIncref(g.pyHandle);
//return g.pyHandle;
}
return(Exceptions.RaiseTypeError("unsubscriptable object"));
}
public static List <Type> GenericsByName(string ns, string basename)
{
Dictionary <string, List <string> > nsmap = null;
mapping.TryGetValue(ns, out nsmap);
if (nsmap == null)
{
return(null);
}
int tick = basename.IndexOf("`");
if (tick > -1)
{
basename = basename.Substring(0, tick);
}
List <string> names = null;
nsmap.TryGetValue(basename, out names);
if (names == null)
{
return(null);
}
var result = new List <Type>();
foreach (string name in names)
{
string qname = ns + "." + name;
Type o = AssemblyManager.LookupType(qname);
if (o != null)
{
result.Add(o);
}
}
return(result);
}
/// <summary>
/// Returns a ClassBase object representing a type that appears in
/// this module's namespace or a ModuleObject representing a child
/// namespace (or null if the name is not found). This method does
/// not increment the Python refcount of the returned object.
/// </summary>
public ManagedType GetAttribute(string name, bool guess)
{
ManagedType cached = null;
cache.TryGetValue(name, out cached);
if (cached != null)
{
return(cached);
}
ModuleObject m;
ClassBase c;
Type type;
//if (AssemblyManager.IsValidNamespace(name))
//{
// IntPtr py_mod_name = Runtime.PyString_FromString(name);
// IntPtr modules = Runtime.PyImport_GetModuleDict();
// IntPtr module = Runtime.PyDict_GetItem(modules, py_mod_name);
// if (module != IntPtr.Zero)
// return (ManagedType)this;
// return null;
//}
string qname = _namespace == string.Empty
? name
: _namespace + "." + name;
// If the fully-qualified name of the requested attribute is
// a namespace exported by a currently loaded assembly, return
// a new ModuleObject representing that namespace.
if (AssemblyManager.IsValidNamespace(qname))
{
m = new ModuleObject(qname);
StoreAttribute(name, m);
return(m);
}
// Look for a type in the current namespace. Note that this
// includes types, delegates, enums, interfaces and structs.
// Only public namespace members are exposed to Python.
type = AssemblyManager.LookupType(qname);
if (type != null)
{
if (!type.IsPublic)
{
return(null);
}
c = ClassManager.GetClass(type);
StoreAttribute(name, c);
return(c);
}
// This is a little repetitive, but it ensures that the right
// thing happens with implicit assembly loading at a reasonable
// cost. Ask the AssemblyManager to do implicit loading for each
// of the steps in the qualified name, then try it again.
bool ignore = name.StartsWith("__");
if (AssemblyManager.LoadImplicit(qname, !ignore))
{
if (AssemblyManager.IsValidNamespace(qname))
{
m = new ModuleObject(qname);
StoreAttribute(name, m);
return(m);
}
type = AssemblyManager.LookupType(qname);
if (type != null)
{
if (!type.IsPublic)
{
return(null);
}
c = ClassManager.GetClass(type);
StoreAttribute(name, c);
return(c);
}
}
// We didn't find the name, so we may need to see if there is a
// generic type with this base name. If so, we'll go ahead and
// return it. Note that we store the mapping of the unmangled
// name to generic type - it is technically possible that some
// future assembly load could contribute a non-generic type to
// the current namespace with the given basename, but unlikely
// enough to complicate the implementation for now.
if (guess)
{
string gname = GenericUtil.GenericNameForBaseName(_namespace, name);
if (gname != null)
{
ManagedType o = GetAttribute(gname, false);
if (o != null)
{
StoreAttribute(name, o);
return(o);
}
}
}
return(null);
}
