/// <summary>
/// Checks to see if the provided members are always visible for the given type.
///
/// This filters out methods such as GetHashCode and Equals on standard .NET
/// types that we expose directly as Python types (e.g. object, string, etc...).
///
/// It also filters out the base helper overrides that are added for supporting
/// super calls on user defined types.
/// </summary>
private static bool IsMethodAlwaysVisible(Type /*!*/ type, MemberInfo /*!*/[] /*!*/ methods)
{
bool alwaysVisible = true;
if (PythonBinder.IsPythonType(type))
{
// only show methods defined outside of the system types (object, string)
foreach (MethodInfo mi in methods)
{
if (PythonBinder.IsExtendedType(mi.DeclaringType) ||
PythonBinder.IsExtendedType(mi.GetBaseDefinition().DeclaringType) ||
PythonHiddenAttribute.IsHidden(mi))
{
alwaysVisible = false;
break;
}
}
}
else if (typeof(IPythonObject).IsAssignableFrom(type))
{
// check if this is a virtual override helper, if so we
// may need to filter it out.
foreach (MethodInfo mi in methods)
{
if (PythonBinder.IsExtendedType(mi.DeclaringType))
{
alwaysVisible = false;
break;
}
}
}
return(alwaysVisible);
}
public static NameType TryGetName(PythonType dt, PropertyInfo pi, MethodInfo prop, out string name)
{
if (PythonHiddenAttribute.IsHidden(pi))
{
name = null;
return(NameType.None);
}
name = pi.Name;
return(GetNameFromMethod(dt, prop, NameType.Property, ref name));
}
internal static PythonTypeSlot GetReflectedField(FieldInfo info)
{
PythonTypeSlot res;
NameType nt = NameType.Field;
if (!PythonBinder.IsExtendedPythonType(info.DeclaringType) &&
!PythonBinder.IsPythonSupportingType(info.DeclaringType) &&
!PythonHiddenAttribute.IsHidden(info))
{
nt |= NameType.PythonField;
}
lock (_fieldCache) {
if (!_fieldCache.TryGetValue(info, out res))
{
if (nt == NameType.PythonField && info.IsLiteral)
{
if (info.FieldType == typeof(int))
{
res = new PythonTypeUserDescriptorSlot(
ScriptingRuntimeHelpers.Int32ToObject((int)info.GetRawConstantValue()),
true
);
}
else if (info.FieldType == typeof(bool))
{
res = new PythonTypeUserDescriptorSlot(
ScriptingRuntimeHelpers.BooleanToObject((bool)info.GetRawConstantValue()),
true
);
}
else
{
res = new PythonTypeUserDescriptorSlot(
info.GetValue(null),
true
);
}
}
else
{
res = new ReflectedField(info, nt);
}
_fieldCache[info] = res;
}
}
return(res);
}
private static bool TrySetMember(T target, string name, object value)
{
MemberInfo member =
(MemberInfo)typeof(T).GetProperty(name) ??
typeof(T).GetField(name);
if (member != null && !PythonHiddenAttribute.IsHidden(member))
{
return(false);
}
target.EnsureCustomAttributes()[name] = value;
return(true);
}
public override PythonTypeSlot /*!*/ GetSlot()
{
List <MethodBase> meths = new List <MethodBase>();
foreach (MethodTracker mt in _trackers)
{
meths.Add(mt.Method);
}
MethodBase[] methods = meths.ToArray();
FunctionType ft = (PythonTypeOps.GetMethodFunctionType(DeclaringType, methods) | FunctionType.Method) & (~FunctionType.Function);
if (_reversed)
{
ft |= FunctionType.ReversedOperator;
}
else
{
ft &= ~FunctionType.ReversedOperator;
}
// check if this operator is only availble after importing CLR (e.g. __getitem__ on functions)
foreach (MethodInfo mi in methods)
{
if (!PythonHiddenAttribute.IsHidden(mi))
{
ft |= FunctionType.AlwaysVisible;
break;
}
}
return(PythonTypeOps.GetFinalSlotForFunction(PythonTypeOps.GetBuiltinFunction(DeclaringType,
Name,
ft,
meths.ToArray()
)));
}
internal static ReflectedGetterSetter GetReflectedProperty(PropertyTracker pt, MemberGroup allProperties, bool privateBinding)
{
ReflectedGetterSetter rp;
lock (_propertyCache) {
if (_propertyCache.TryGetValue(pt, out rp))
{
return(rp);
}
NameType nt = NameType.PythonProperty;
MethodInfo getter = FilterProtectedGetterOrSetter(pt.GetGetMethod(true), privateBinding);
MethodInfo setter = FilterProtectedGetterOrSetter(pt.GetSetMethod(true), privateBinding);
if ((getter != null && PythonHiddenAttribute.IsHidden(getter, true)) ||
(setter != null && PythonHiddenAttribute.IsHidden(setter, true)))
{
nt = NameType.Property;
}
ExtensionPropertyTracker ept = pt as ExtensionPropertyTracker;
if (ept == null)
{
ReflectedPropertyTracker rpt = pt as ReflectedPropertyTracker;
Debug.Assert(rpt != null);
if (PythonBinder.IsExtendedType(pt.DeclaringType) ||
PythonHiddenAttribute.IsHidden(rpt.Property, true))
{
nt = NameType.Property;
}
if (pt.GetIndexParameters().Length == 0)
{
List <MethodInfo> getters = new List <MethodInfo>();
List <MethodInfo> setters = new List <MethodInfo>();
IList <ExtensionPropertyTracker> overriddenProperties = NewTypeMaker.GetOverriddenProperties((getter ?? setter).DeclaringType, pt.Name);
foreach (ExtensionPropertyTracker tracker in overriddenProperties)
{
MethodInfo method = tracker.GetGetMethod(privateBinding);
if (method != null)
{
getters.Add(method);
}
method = tracker.GetSetMethod(privateBinding);
if (method != null)
{
setters.Add(method);
}
}
foreach (PropertyTracker propTracker in allProperties)
{
MethodInfo method = propTracker.GetGetMethod(privateBinding);
if (method != null)
{
getters.Add(method);
}
method = propTracker.GetSetMethod(privateBinding);
if (method != null)
{
setters.Add(method);
}
}
rp = new ReflectedProperty(rpt.Property, getters.ToArray(), setters.ToArray(), nt);
}
else
{
rp = new ReflectedIndexer(((ReflectedPropertyTracker)pt).Property, NameType.Property, privateBinding);
}
}
else
{
rp = new ReflectedExtensionProperty(new ExtensionPropertyInfo(pt.DeclaringType, getter ?? setter), nt);
}
_propertyCache[pt] = rp;
return(rp);
}
}
