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• Overinclusion of libraries C++

  - by wyatt

  I'm reading about how to put a makefile together, but no-one seems to mention what to do if your files require different sets of libraries, they all seem to use the same set of libraries for each file. Since it seems unlikely that every single file has the same libraries, I take it the list they use must amalgamate all of the libraries required across the project. I just wanted to know if there's any downside to including too many libraries, or if the compiler works out which ones are needed and ignores the rest? Thanks

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• Need a sample function implement for array interface member...

  - by Nano HE

  I have a interface member like this. AppInterface.cs ObjLocation[] ArrayLocations { get; } App.cs public ObjLocation[] ArrayLocations { get { return **something**; } } I dont know how to complete it, Or there is another way to implement the array members. Then It can pass the compiler. thank you.

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• How to get VS or Xcode warning with something like "x = x++"?

  - by Jim Buck

  In the spirit of undefined behavior associated with sequence points such as “x = ++x” is it really undefined?, how does one get the compiler to complain about such code? Specifically, I am using Visual Studio 2010 and Xcode 4.3.1, the latter for an OSX app, and neither warned me about this. I even cranked up the warnings on VS2010 to "all", and it happily compiled this. (For the record, VS2010's version added 1 to the variable where Xcode's version kept the variable unchanged.)

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• does passing __m128i objects by reference to inline function cause these objects to be moved to stac

  - by ~buratinas

  Hello, I'm writing transpose function for 8x16bit vectors with SSE2 intrinsics. Since there are 8 arguments for that function (a matrix of 8x8x16bit size), I can't do anything but pass them by reference. Will that be optimized by the compiler (I mean, will these __m128i objects be passed in registers instead of stack)? Code snippet: inline void transpose (__m128i &a0, __m128i &a1, __m128i &a2, __m128i &a3, __m128i &a4, __m128i &a5, __m128i &a6, __m128i &a7) { .... }

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• What's the term for a program or system that is used to maintain itself?

  - by eft

  And I don't mean skynet. I'm thinking of say a compiler application that is used to compile itself, a VCS that tracks its own source code etc.

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• doxygen with IDL/ODL

  - by John

  If you have a C++ project that has a bunch of .ODL files and the generated .h files from the ODL compiler, should doxygen be told to parse both .odl and .h, or only one or the other? In general I don't like documenting generated code but IDL is sort of a special case. In any case, it seems like the member listing of ODL files is not quite working properly in my tests, are ODL files properly parsed?

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• Reading a large text file to memory in C++

  - by NoneType

  Is there a way to read a large text file (~60MB) into memory at once (like a compiler flag to increase program memory limit) ? Currently, ofstream's open function throws a segmentation fault while trying to read this file. ifstream fis; fis.open("my_large_file.txt"); // Segfaults here The file just consists of rows of the form number_1<tabspace>number_2 i.e., two numbers separated by a tabspace.

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• is const (c++) optional?

  - by Dr Deo

  according to some tutorials i read a while back, the "const" declaration makes a variable "constant" ie it cannot change later. But i find this const declaration abit inconveniencing since the compiler sometimes gives errors like "cannot convert const int to int" or something like that. and i find myself cheating by removing it anyway. question: assuming that i am careful about not changing a variable in my source code, can i happily forget about this const stuff? Thanks in advance

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• Why -use-network=false

  - by dejaninic

  Hi guys. Dose anyone knows why I have to use -use-network=false in my Flex Builder?!?!?! This is set inside the Project Properties and is Additional compiler argument. This is only when I want to read in a external file like XML. Others in my team doesn't have to have -use-network=false ????

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• crt0.o and crt1.o -- What's the difference?

  - by Earlz

  Hello, recently I've been trying to debug some low level work and I could not find the crt0.S for the compiler(avr-gcc) but I did find a crt1.S (and the same with the corresponding .o files) What is the difference between these two files? Is crt1 something completely different or what? They both seem to have to do with something for bootstrapping(setting up stack frame and such), but why the distinction?

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• C# empty statement

  - by dotnetdev

  In C#, I can write something like: using (new MyDisposableClass().MethodA()); The semicolon causes a compiler warning to be shown which states possible mistaken empty statement. I haven't run the above code but won't the method still be called? What uses is there of this type of coding convention? I saw another thread on here about this but I ask in case there areny differences now/therefore different replies. Thanks

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• LINQ: How do I concatenate a list of integers into comma delimited string?

  - by Haoest

  It's probably something silly I missed, but I try to concatenate a list of integers instead of summing them with: integerArray.Aggregate((accumulator, piece) => accumulator+"," + piece) The compiler complained about argument error. Is there a slick way to do this without having to go through a loop?

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• What's wrong with this print-iterable method?

  - by Tom Brito

  private static void printIterable(Iterable iterable) { // ERROR: "Type mismatch: cannot convert from element type Object to Iterable" for (Iterable i : iterable) { System.out.println(i); } } What the compiler is talking about? Its an Iterable, not an Object.

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• Are tr1 headers available for gcc v3.4.6?

  - by WilliamKF

  Are tr1 headers available for g++ v3.4.6? If so, how can I locate them at compile time. The following is failing to compile: #include <tr1/memory> With the following error: myModule.h:20:24: tr1/memory: No such file or directory Do I need to move to a later compiler or do I have the headers somewhere?

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• I want to know the behaviour of break statement in C. Does it work only for ';for-while-do-switch' o

  - by avanish

  Suppose, I have a 'if statement' inside a 'for-loop'. for( ; ; ) { ------- if( ) { printf(" inside if"); break; }//if printf("inside for"); }//for now, will the 'break-statement' cause the compiler to come out of the 'for-loop' or will it only come out of the if loop on the 'if-condition' being satisfied.

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• How can I close a JFrame by click on a button?

  - by Roman

  I would like to have a button in my window such that if I click it (button) the window is closed. I found out that I can close a window in the following way: referenceToTheFrame.hide(); //hides the frame from view refToTheFrame.dispose(); //disposes the frame from memory But if I do this way, compiler complains: Note: myProgram.java uses or overrides a deprecated API Note: Recompile with -Xlint:deprication for details. Do I do something unsafe?

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• How to connect to a database from VC++/CLI .NET 4.0

  - by abatishchev

  How to connect to a database (any natively supported by .NET) - SQL Server 2008 or Access - from a Windows Forms application written on VC++/CLI (compiler ver. 16.0 from .NET 4.0)

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• [game] How is it possible to legally write ::: in C++ and ??? in C#?

  - by daveny

  These questions are a kind of game, and I did not find the solution for them. It is possible to write ::: in C++ without using quotes or anything like this and the compiler will accept it (macros are prohibited too). And the same is true for C# too, but in C#, you have to write ???. I think C++ will use the :: scope operator and C# will use ? : , but I do not know the answers to them. Any idea?

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• recursive typedef

  - by FredOverflow

  Is the following allowed? typedef Foo<Bar> Bar; My compiler complains that 'class Bar' has a previous declaration as 'class Bar'.

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• Scala Unit type

  - by portoalet

  I use opencsv to parse csv files, and my code is while( (line = reader.readNext()) != null ) { .... } I got a compiler warning saying: comparing values of types Unit and Null using `!=' will always yield true [warn] while( (aLine = reader.readNext()) != null ) { How should I do the while loop?

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• How can I know when QProcess wants to read input?

  - by mpcabd

  I'm implementing a compiler in my Compilers class, I'm using Qt & C++. After I have generated the machine code from the source code, I'm executing the virtual machine that will execute the call. I'm facing a problem here, I'm using readyRead() signal to get output from the virtual machine, but how can I know that the virtual machine wants to read data from the user? I wanna show the user an input dialog each time the machine asks for input.

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• How to see list of html-tidy errors in VIM for Windows?

  - by stumbling

  I am using Vim 7.2 on WinXP. I've tired to run tidy like this: :compiler tidy :make :copen When I do :copen it shows me no errors to jump to. I've seen references that shellpipe might need to be set a specific way, but that refers to an earlier version of VIM. How should I be using HTML-tidy with VIM, and do I need to mess with shellpipe to get it to work with WinXP?

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• Constructor for an immutable struct

  - by Danvil

  Consider the following simple immutable struct: struct Stash { public int X { get; private set; } public Stash(int _x) { X = _x; } } This is not working, because the compiler wants me to initialize the "backing field" before I can access the property. How can I solve this?

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• .NET coupled with MATLAB or R?

  - by Peter

  I'm writing a program in .NET that will need to utilize the statistical and data analysis functions of R or MATLAB. I have used R but am now contemplating moving to MATLAB since it has a .Net compiler while R can only interface via COM objects. Can anyone recommend going either way? I know MATLAB is infinitely more expensive than R (since R is free) but I'm thinking that may translate to an easier development cycle?

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• What is DEFAULT_CC in function declaration?

  - by humoeba

  I'm relatively new to C, and am curious what this syntax means in a function declaration: int DEFAULT_CC foo(void) where DEFAULT_CC is probably defined somewhere else as: #define DEFAULT_CC "cc" Is this a direction to use a certain compiler or something?

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