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IQ Puzzle with no pattern Word with the largest number of different phonetic vowel sounds Why can't we use the toilet when the train isn't moving? Filter columns basing on the value of other column Why would a password requirement prohibit a number in the last character? A little learning curve... c++ oop forward-declaration share|improve this question asked Mar 23 '12 at 13:33 demonofnight 91721534 Which line is which line?

Another issue is probably the default arguments. Implement the constructor later after the full declaration of dynmatrix. Developing web applications for long lifespan (20+ years) Create a wire coil Is the NHS wrong about passwords? If you can use a forward declaration then this should be preferred. –Loki Astari Aug 8 '11 at 22:25 add a comment| 3 Answers 3 active oldest votes up vote 6

You simply save the location of the unreferenced symbols and then apply a second processing stage to fill in the undefined references once you have more information. Browse other questions tagged c++ gcc forward-declaration incomplete-type or ask your own question. What Is A Header? Meaning of "oh freak" Is it plausible for my creature to have similar IQ as humans?

If you'd like to contribute content, let us know. struct _a { int foo; int bar; FxnPointer PtrToFxn; }; int main(void) { a test_struct; return 0; } Comment 5 Jonathan Wakely 2011-05-26 23:44:43 UTC (In reply to comment #3) > www.edeltech.ch Reply Quote 0 Loading More Posts 4 Posts 6624 Views Reply Reply as topic Log in to reply 1 / 1 Search: Forum UNIX/Linux Programming Forward declaration with g++ In a not-so-related note, use #include "header.hpp", not #include .

Join them; it only takes a minute: Sign up invalid use of incomplete type / forward declaration up vote 7 down vote favorite 1 I tried to look at the similar EDIT2: Based on your clarifying edit to your OP, you must #include the complete declaration of Level, and not try to use a forward declaration. A type that is incomplete at the template definition site can be used if it's complete at the instantiation site. Anyway this doesn't bother me as much as the stupid arcane rules for explicit template class member function instantiation, but I think that one deserves it's own thread.

It is not a forward declaration of S. This is from db_column.cpp Code: XDBColumn& XDBColumn::operator=(const XDBColumn& other) { if (&other == this) return *this; REF_RELEASE(ref_impl()); REF_ADD(other.impl()); ref_impl() = other.impl(); return *this; } REF_RELEASE is line 50 (as noted in i needed to add those headers in the cpp file.. share|improve this answer answered Mar 23 '12 at 13:42 dbrank0 5,72221229 add a comment| up vote 2 down vote Either the header declaring a class should be included (#include "xxx.h") or

The really underlying problem is that you're using #include when you haven't separated your code into source files and header files. maksim1979 last edited by Hi guys I'm playing with QML/C++ integration and now I'm trying to set context property as described here http://qt-project.org/doc/qt-5.0/qtqml/qtqml-cppintegration-contextproperties.html So my code looks like this @ #include Is there a role with more responsibility? Do you want to help us debug the posting issues ? < is the place to report it, thanks !

I'll look for some posts. (May take time) –John Dibling Nov 16 '10 at 17:47 Here's one: stackoverflow.com/questions/3469588/… –John Dibling Nov 16 '10 at 17:49 Here's another How do I say "best practice" in Esperanto? Oh and for laserlight, for some reason I pasted in older buggy code for my example. Notice the typedef keyword you have that doesn't define anything (notice it wasn't there in the version I suggested).

I think you can only specify the defaults at one place (otherwise they might get out of sync) and I guess forward declaration is not the right place to do it. Comment 3 Brad 2011-05-26 23:23:17 UTC (In reply to comment #2) > I forgot to mention GCC compiles it correctly with the C++ front-end. I also figure that such a system would create headaches for compiler vendors (I certainly know templates does) or it might have been implemented, or suggested, already. But I'm a little wary of doing so, as it is originally windows code, and worked fine there.

possible missuse of abstract class? (C++)1invalid use of incomplete type (nested class case)0invalid use of incomplete type in handling exceptions0Why do I get incomplete type when using forward declaration instead of Security Patch SUPEE-8788 - Possible Problems? share|improve this answer edited Aug 8 '11 at 22:18 answered Aug 8 '11 at 21:53 Kerrek SB 284k40517749 1 forward declarations are a bit more powerful than you appear to Originally Posted by Salem You mean it's included as a crutch to help ancient programmers limp along without them having to relearn too much.

This doesn't quite explain the error though. Home Qt Development QML and Qt Quick [Solved] Error: forward declaration of 'class QQmlContext' [Solved] Error: forward declaration of 'class QQmlContext' This topic has been deleted. Quick Navigation C++ Programming Top Site Areas Settings Private Messages Subscriptions Who's Online Search Forums Forums Home Forums General Programming Boards C++ Programming C Programming C# Programming Game Programming Networking/Device Communication Originally Posted by Salem You mean it's included as a crutch to help ancient programmers limp along without them having to relearn too much.

Powered by vBulletin Version 4.2.3 Copyright © 2016 vBulletin Solutions, Inc. You can jump or call a label that exists past the code that calls the jump. Status: RESOLVED INVALID Alias: None Product: gcc Classification: Unclassified Component: c (show other bugs) Version: 4.5.2 Importance: P3 normal Target Milestone: --- Assignee: Not yet assigned to anyone URL: Keywords: Depends Related 404When can I use a forward declaration?156Forward declaration of a typedef in C++130Forward declaration of nested types/classes in C++82How do I forward declare an inner class?3forward declaration and template function

PSM PS: This is perverse, but it might be something close to what you're looking for: Code: /* EXAMPLE 3 */ #include #include typedef struct ClassRec *ClassRecPtr; typedef struct The next place I would look is: #include "global_includes.h" Any global includes that are included in a header file better be very simple. For that, you must define the entire class body.