public static bool TryBindSetMember(SetMemberBinder binder, ref MetaObject instance, MetaObject value) {
if (TryGetMetaObject(ref instance)) {
instance = instance.BindSetMember(binder, value);
return true;
}
return false;
}
public override MetaObject BindSetMember(SetMemberBinder binder, MetaObject value) {
ContractUtils.RequiresNotNull(binder, "binder");
return binder.FallbackSetMember(UnwrapSelf(), value);
}
public override MetaObject BindSetMember(SetMemberBinder binder, MetaObject value) {
ContractUtils.RequiresNotNull(binder, "binder");
ContractUtils.RequiresNotNull(value, "value");
ExpandoClass klass;
int index;
ExpandoClass originalClass = GetClassEnsureIndex(binder.Name, binder.IgnoreCase, out klass, out index);
string methodName = binder.IgnoreCase ? "ExpandoSetValueIgnoreCase" : "ExpandoSetValue";
return new MetaObject(
AddDynamicTestAndDefer(
binder,
new MetaObject[] { this, value },
klass,
originalClass,
Expression.Convert(
Expression.Call(
typeof(RuntimeOps).GetMethod(methodName),
GetLimitedSelf(),
Expression.Constant(klass),
Expression.Constant(index),
Helpers.Convert(
value.Expression,
typeof(object)
)
),
typeof(object)
)
),
GetRestrictions()
);
}
private MetaObject TryEventHandlerNoop(SetMemberBinder binder, MetaObject value) {
ComEventDesc @event;
if (_self.TryGetEventHandler(binder.Name, out @event) && value.LimitType == typeof(BoundDispEvent)) {
// Drop the event property set.
return new MetaObject(
Expression.Constant(null),
value.Restrictions.Merge(IDispatchRestriction()).Merge(Restrictions.GetTypeRestriction(value.Expression, typeof(BoundDispEvent)))
);
}
return null;
}
private MetaObject TryPropertyPut(SetMemberBinder binder, MetaObject value) {
ComMethodDesc method;
if (_self.TryGetPropertySetter(binder.Name, out method, value.LimitType) ||
_self.TryGetPropertySetterExplicit(binder.Name, out method, value.LimitType)) {
Restrictions restrictions = IDispatchRestriction();
Expression dispatch =
Expression.Property(
Helpers.Convert(Expression, typeof(IDispatchComObject)),
typeof(IDispatchComObject).GetProperty("DispatchObject")
);
return new ComInvokeBinder(
new ArgumentInfo[0],
new[] { value },
restrictions,
Expression.Constant(method),
dispatch,
method
).Invoke();
}
return null;
}
public override MetaObject BindSetMember(SetMemberBinder binder, MetaObject value) {
ContractUtils.RequiresNotNull(binder, "binder");
return
// 1. Check for simple property put
TryPropertyPut(binder, value) ??
// 2. Check for event handler hookup where the put is dropped
TryEventHandlerNoop(binder, value) ??
// 3. Fallback
base.BindSetMember(binder, value);
}
/// <summary>
/// When overridden in a derived class provides the non-Meta implementation of setting a member.
///
/// When not overridden the call site requesting the binder determines the behavior.
/// </summary>
public virtual bool TrySetMember(SetMemberBinder binder, object value) {
throw new NotSupportedException();
}
public override MetaObject BindSetMember(SetMemberBinder binder, MetaObject value) {
if (IsOverridden("TrySetMember")) {
return CallMethodReturnLast("TrySetMember", binder, GetArgs(value), (e) => binder.FallbackSetMember(this, value, e));
}
return base.BindSetMember(binder, value);
}
public virtual MetaObject BindSetMember(SetMemberBinder binder, MetaObject value) {
ContractUtils.RequiresNotNull(binder, "binder");
return binder.FallbackSetMember(this, value);
}