|
public TryGetNonGenericType ( |
||
| nonGenericType | ||
| return | bool | |
private MetaObject MakeGetMemberTarget(GetMemberInfo getMemInfo, MetaObject target)
{
Type type = target.LimitType.IsCOMObject ? target.Expression.Type : target.LimitType;
Restrictions restrictions = target.Restrictions;
Expression self = target.Expression;
target = target.Restrict(target.LimitType);
// needed for GetMember call until DynamicAction goes away
OldDynamicAction act = OldGetMemberAction.Make(
this,
getMemInfo.Name
);
// Specially recognized types: TypeTracker, NamespaceTracker, and StrongBox.
// TODO: TypeTracker and NamespaceTracker should technically be IDO's.
MemberGroup members = MemberGroup.EmptyGroup;
if (typeof(TypeTracker).IsAssignableFrom(type))
{
restrictions = restrictions.Merge(
Restrictions.GetInstanceRestriction(target.Expression, target.Value)
);
TypeGroup tg = target.Value as TypeGroup;
Type nonGen;
if (tg == null || tg.TryGetNonGenericType(out nonGen))
{
members = GetMember(act, ((TypeTracker)target.Value).Type, getMemInfo.Name);
if (members.Count > 0)
{
// we have a member that's on the type associated w/ the tracker, return that...
type = ((TypeTracker)target.Value).Type;
self = null;
}
}
}
if (members.Count == 0)
{
// Get the members
members = GetMember(act, type, getMemInfo.Name);
}
if (members.Count == 0)
{
if (typeof(TypeTracker).IsAssignableFrom(type))
{
// ensure we don't have a non-generic type, and if we do report an error now. This matches
// the rule version of the default binder but should probably be removed long term
Type x = ((TypeTracker)target.Value).Type;
}
else if (type.IsInterface)
{
// all interfaces have object members
type = typeof(object);
members = GetMember(act, type, getMemInfo.Name);
}
}
Expression propSelf = self;
// if lookup failed try the strong-box type if available.
if (members.Count == 0 && typeof(IStrongBox).IsAssignableFrom(type))
{
// properties/fields need the direct value, methods hold onto the strong box.
propSelf = Ast.Field(AstUtils.Convert(self, type), type.GetField("Value"));
type = type.GetGenericArguments()[0];
members = GetMember(
act,
type,
getMemInfo.Name
);
}
MakeBodyHelper(getMemInfo, self, propSelf, type, members);
getMemInfo.Body.Restrictions = restrictions;
return(getMemInfo.Body.GetMetaObject(target));
}
private DynamicMetaObject MakeGetMemberTarget(GetMemberInfo getMemInfo, DynamicMetaObject target)
{
Type targetType = target.GetLimitType();
BindingRestrictions restrictions = target.Restrictions;
DynamicMetaObject self = target;
target = target.Restrict(target.GetLimitType());
// Specially recognized types: TypeTracker, NamespaceTracker, and StrongBox.
// TODO: TypeTracker and NamespaceTracker should technically be IDO's.
MemberGroup members = MemberGroup.EmptyGroup;
if (typeof(TypeTracker).IsAssignableFrom(targetType))
{
restrictions = restrictions.Merge(
BindingRestrictions.GetInstanceRestriction(target.Expression, target.Value)
);
TypeGroup tg = target.Value as TypeGroup;
Type nonGen;
if (tg == null || tg.TryGetNonGenericType(out nonGen))
{
members = GetMember(MemberRequestKind.Get, ((TypeTracker)target.Value).Type, getMemInfo.Name);
if (members.Count > 0)
{
// we have a member that's on the type associated w/ the tracker, return that...
targetType = ((TypeTracker)target.Value).Type;
self = null;
}
}
}
if (members.Count == 0)
{
// Get the members
members = GetMember(MemberRequestKind.Get, targetType, getMemInfo.Name);
}
if (members.Count == 0)
{
if (typeof(TypeTracker).IsAssignableFrom(targetType))
{
// Throws an exception if we don't have a non-generic type, and if we do report an error now. This matches
// the rule version of the default binder but should probably be removed long term.
EnsureTrackerRepresentsNonGenericType((TypeTracker)target.Value);
}
else if (targetType.IsInterface())
{
// all interfaces have object members
targetType = typeof(object);
members = GetMember(MemberRequestKind.Get, targetType, getMemInfo.Name);
}
}
DynamicMetaObject propSelf = self;
// if lookup failed try the strong-box type if available.
if (members.Count == 0 && typeof(IStrongBox).IsAssignableFrom(targetType) && propSelf != null)
{
// properties/fields need the direct value, methods hold onto the strong box.
propSelf = new DynamicMetaObject(
Ast.Field(AstUtils.Convert(propSelf.Expression, targetType), targetType.GetInheritedFields("Value").First()),
propSelf.Restrictions,
((IStrongBox)propSelf.Value).Value
);
targetType = targetType.GetGenericArguments()[0];
members = GetMember(
MemberRequestKind.Get,
targetType,
getMemInfo.Name
);
}
MakeBodyHelper(getMemInfo, self, propSelf, targetType, members);
getMemInfo.Body.Restrictions = restrictions;
return(getMemInfo.Body.GetMetaObject(target));
}