void ResolveConditionalAccessReceiver(ResolveContext rc) { // LAMESPEC: Not sure why this is explicitly disalloed with very odd error message if (!rc.HasSet(ResolveContext.Options.DontSetConditionalAccessReceiver) && method_group.HasConditionalAccess()) { Error_OperatorCannotBeApplied(rc, loc, "?", method_group.Type); } }
protected override Expression DoResolve(ResolveContext ec) { constructor_method = Delegate.GetConstructor(type); var invoke_method = Delegate.GetInvokeMethod(type); if (!ec.HasSet(ResolveContext.Options.ConditionalAccessReceiver)) { if (method_group.HasConditionalAccess()) { conditional_access_receiver = true; ec.Set(ResolveContext.Options.ConditionalAccessReceiver); } } Arguments arguments = CreateDelegateMethodArguments(ec, invoke_method.Parameters, invoke_method.Parameters.Types, loc); method_group = method_group.OverloadResolve(ec, ref arguments, this, OverloadResolver.Restrictions.CovariantDelegate); if (conditional_access_receiver) { ec.With(ResolveContext.Options.ConditionalAccessReceiver, false); } if (method_group == null) { return(null); } var delegate_method = method_group.BestCandidate; if (delegate_method.DeclaringType.IsNullableType) { ec.Report.Error(1728, loc, "Cannot create delegate from method `{0}' because it is a member of System.Nullable<T> type", delegate_method.GetSignatureForError()); return(null); } if (!AllowSpecialMethodsInvocation) { Invocation.IsSpecialMethodInvocation(ec, delegate_method, loc); } ExtensionMethodGroupExpr emg = method_group as ExtensionMethodGroupExpr; if (emg != null) { method_group.InstanceExpression = emg.ExtensionExpression; TypeSpec e_type = emg.ExtensionExpression.Type; if (TypeSpec.IsValueType(e_type)) { ec.Report.Error(1113, loc, "Extension method `{0}' of value type `{1}' cannot be used to create delegates", delegate_method.GetSignatureForError(), e_type.GetSignatureForError()); } } TypeSpec rt = method_group.BestCandidateReturnType; if (rt.BuiltinType == BuiltinTypeSpec.Type.Dynamic) { rt = ec.BuiltinTypes.Object; } if (!Delegate.IsTypeCovariant(ec, rt, invoke_method.ReturnType)) { Expression ret_expr = new TypeExpression(delegate_method.ReturnType, loc); Error_ConversionFailed(ec, delegate_method, ret_expr); } if (method_group.IsConditionallyExcluded) { ec.Report.SymbolRelatedToPreviousError(delegate_method); MethodOrOperator m = delegate_method.MemberDefinition as MethodOrOperator; if (m != null && m.IsPartialDefinition) { ec.Report.Error(762, loc, "Cannot create delegate from partial method declaration `{0}'", delegate_method.GetSignatureForError()); } else { ec.Report.Error(1618, loc, "Cannot create delegate with `{0}' because it has a Conditional attribute", TypeManager.CSharpSignature(delegate_method)); } } var expr = method_group.InstanceExpression; if (expr != null && (expr.Type.IsGenericParameter || !TypeSpec.IsReferenceType(expr.Type))) { method_group.InstanceExpression = new BoxedCast(expr, ec.BuiltinTypes.Object); } eclass = ExprClass.Value; return(this); }