compiler-directives

I've been asked to maintain some not-as-legacy-as-I-would-like code, and it is riddled with compiler directives, making it pretty much unreadable and almost as maintainable. Case in point: #if CONDITION_1 protected override void BeforeAdd(LogEntity entity) #else protected override void BeforeAdd(AbstractBusinessEntity entity) #endif { #if CONDITON_1 entity.DateTimeInsert = DateTime.Now; #else ((LogEntity) entity).DateTimeInsert = DateTime.Now; #endif base.BeforeAdd(entity); } using directives are even prettier: #if CONDITION_1 using CompanyName.Configuration; #endif #if CONDITION_2||CONDITION

I know the #warning directive does not exist in vb.net... is there anything like it? I want to be able to throw messages (warnings) at compiler time. As far as I've ever been able to find... no. 来源： https://stackoverflow.com/questions/192822/warning-directive-in-vb-net

Is there any compiler that has a directive or a parameter to cast integer calculation to float implicitly. For example: float f = (1/3)*5; cout << f; the "f" is "0", because calculation's constants(1, 3, 10) are integer. I want to convert integer calculation with a compiler directive or parameter. I mean, I won't use explicit casting or ".f" prefix like that: float f = ((float)1/3)*5; or float f = (1.0f/3.0f)*5.0f; Do you know any c/c++ compiler which has any parameter to do this process without explicit casting or ".f" thing? If you don't like either of the two methods you mentioned, you're

I want to disable a specific warning (W1035) in my code, since I think that the compiler is wrong about this warning: function TfrmNagScreen.Run: TOption; begin if ShowModal = mrOk then Result := TOption(rdgAction.EditValue) else Abort end; There is no way the result could be undefined, since Abort throws EAbort . I tried: {$WARN 1035 Off} : Apparently this only works for some specific errors (see Documentation ) {$W-1035} : Does nothing at all I know I can switch off the warning globally in the project options, or using {$WARNINGS OFF} , but that is not what is intended here. Edit: I have QC

When I use Delphi directives in code, like: {$IFDEF something} . . . {$ENDIF} Where do I assign the word 'something' in the project? I tried in some places in project options but it didn't work. Guess I didn't find the correct one. It's in the Conditional Defines slot under Project | Options, which looks like this on D2010: Other answers have pointed you at the places to define symbols and the scope implications of the different approaches. However, what no-one has yet mentioned is that if you change the DEFINE symbols you MUST do a FULL BUILD of your project for them to have any effect on