private EXPR BindIsEvent(
CSharpIsEventBinder binder,
ArgumentObject[] arguments,
Dictionary<int, LocalVariableSymbol> dictionary)
{
// The IsEvent binder will never be called without an instance object. This
// is because the compiler only gen's this code for dynamic dots.
EXPR callingObject = CreateLocal(arguments[0].Type, false, dictionary[0]);
MemberLookup mem = new MemberLookup();
CType boolType = SymbolLoader.GetReqPredefType(PredefinedType.PT_BOOL);
bool result = false;
if (arguments[0].Value == null)
{
throw Error.NullReferenceOnMemberException();
}
Debug.Assert(_bindingContext.ContextForMemberLookup() != null);
SymWithType swt = _symbolTable.LookupMember(
binder.Name,
callingObject,
_bindingContext.ContextForMemberLookup(),
0,
mem,
false,
false);
// If lookup returns an actual event, then this is an event.
if (swt != null && swt.Sym.getKind() == SYMKIND.SK_EventSymbol)
{
result = true;
}
// If lookup returns the backing field of a field-like event, then
// this is an event. This is due to the Dev10 design change around
// the binding of +=, and the fact that the "IsEvent" binding question
// is only ever asked about the LHS of a += or -=.
if (swt != null && swt.Sym.getKind() == SYMKIND.SK_FieldSymbol && swt.Sym.AsFieldSymbol().isEvent)
{
result = true;
}
return _exprFactory.CreateConstant(boolType, ConstValFactory.GetBool(result));
}
#endregion
