Error Preprocessor Visual Studio
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Visual Studio Preprocessor To A File
been removed. You’ll be auto redirected in 1 second. C/C++ Preprocessor Reference Preprocessor Preprocessor Directives Preprocessor Directives #error Directive visual studio preprocessor definitions value #error Directive #error Directive #define Directive #error Directive #if, #elif, #else, and #endif Directives #ifdef and #ifndef Directives #import Directive #include Directive #line Directive Null Directive #undef Directive #using Directive TOC
Visual Studio Preprocessor Variables
Collapse the table of content Expand the table of content This documentation is archived and is not being maintained. This documentation is archived and is not being maintained. #error Directive (C/C++) Visual Studio 2015 Other Versions Visual Studio 2013 Visual Studio 2012 Visual Studio 2010 Visual Studio 2008 Visual Studio 2005 Visual Studio .NET 2003 The #error directive emits a user-specified error visual studio preprocessor output message at compile time and then terminates the compilation.Syntax Copy #errortoken-string RemarksThe error message that this directive emits includes the token-string parameter. The token-string parameter is not subject to macro expansion. This directive is most useful during preprocessing for notifying the developer of a program inconsistency or the violation of a constraint. The following example demonstrates error processing during preprocessing: Copy #if !defined(__cplusplus) #error C++ compiler required. #endif See AlsoPreprocessor Directives Show: Inherited Protected Print Export (0) Print Export (0) Share IN THIS ARTICLE Is this page helpful? Yes No Additional feedback? 1500 characters remaining Submit Skip this Thank you! We appreciate your feedback. Dev centers Windows Office Visual Studio Microsoft Azure More... Learning resources Microsoft Virtual Academy Channel 9 MSDN Magazine Community Forums Blogs Codeplex Support Self support Programs BizSpark (for startups) Microsoft Imagine (for students) United States (English) Newsletter Privacy & cookies Terms of use Trademarks © 2016 Microsoft © 2016 Microsoft
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Visual Studio Preprocessor Definitions Not Working
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Visual Studio Preprocessor Definition Environment Variable
Samples We’re sorry. The content you requested has been removed. You’ll be auto redirected in 1 second. visual studio preprocessor defines MSDN Library MSDN Library MSDN Library MSDN Library Design Tools Development Tools and Languages Mobile and Embedded Development .NET Development Office development Online Services Open Specifications patterns & https://msdn.microsoft.com/en-us/library/c8tk0xsk.aspx practices Servers and Enterprise Development Speech Technologies Web Development Windows Desktop App Development TOC Collapse the table of content Expand the table of content This documentation is archived and is not being maintained. This documentation is archived and is not being maintained. Compiler Error CS1024 Other Versions Visual Studio 2008 Visual Studio 2005 Visual Studio https://msdn.microsoft.com/en-us/library/ww43bwhw.aspx .NET 2003 Preprocessor directive expectedA line began with the pound symbol (#), but the subsequent string was not a valid preprocessor directive.The following sample generates CS1024: Copy // CS1024.cs #import System // CS1024 Show: Inherited Protected Print Export (0) Print Export (0) Share IN THIS ARTICLE Is this page helpful? Yes No Additional feedback? 1500 characters remaining Submit Skip this Thank you! We appreciate your feedback. Dev centers Windows Office Visual Studio Microsoft Azure More... Learning resources Microsoft Virtual Academy Channel 9 MSDN Magazine Community Forums Blogs Codeplex Support Self support Programs BizSpark (for startups) Microsoft Imagine (for students) United States (English) Newsletter Privacy & cookies Terms of use Trademarks © 2016 Microsoft © 2016 Microsoft
here for a quick overview of the site Help Center Detailed answers to any questions you might have Meta Discuss the workings and policies of this site About Us Learn more about Stack Overflow the company http://stackoverflow.com/questions/2221517/how-do-i-generate-an-error-or-warning-in-the-c-preprocessor Business Learn more about hiring developers or posting ads with us Stack Overflow Questions Jobs http://goodliffe.blogspot.com/2009/07/c-how-to-say-warning-to-visual-studio-c.html Documentation Tags Users Badges Ask Question x Dismiss Join the Stack Overflow Community Stack Overflow is a community of 4.7 million programmers, just like you, helping each other. Join them; it only takes a minute: Sign up How do I generate an error or warning in the C preprocessor? up vote 19 down vote favorite 1 I have a visual studio program that must be compiled only in DEBUG mode. (testing purpose) How can I have the preprocessor prevent compilation in RELEASE mode? c-preprocessor share|improve this question edited Jun 25 at 23:11 phs 7,05722761 asked Feb 8 '10 at 12:29 Eonil 31.1k43203377 add a comment| 7 Answers 7 active oldest votes up vote 34 down vote accepted Place anywhere: #ifndef DEBUG #error Only Debug builds are supported #endif share|improve this answer answered Feb 8 '10 visual studio preprocessor at 12:33 Hans Passant 654k819601604 add a comment| up vote 11 down vote C provide a #error statement, and most compilers add a #warning statement. The gcc documentation recommends to quote the message. share|improve this answer edited Nov 17 '15 at 17:28 answered Feb 8 '10 at 12:37 philant 22.9k94890 1 @Antonio Right, there is no [more] recommendation there. I replaced the link with one to gcc doc. –philant Nov 17 '15 at 17:29 add a comment| up vote 4 down vote You can use a error directive for that. The following code will throw an error at compile time if DEBUG is not defined: #ifndef DEBUG #error This is an error message #endif share|improve this answer edited Feb 8 '10 at 23:32 answered Feb 8 '10 at 12:34 Laurent Etiemble 21k44075 Sorry, I mix pragma and error while typing. Corrected in answer. –Laurent Etiemble Feb 8 '10 at 23:32 add a comment| up vote 4 down vote Maybe something more sofisticated, but it is only copy&paste of previous solutions. :-) #ifdef DEBUG #pragma message ( "Debug configuration - OK" ) #elif RELEASE #error "Release configuration - WRONG" #else #error "Unknown configuration - DEFINITELY WRONG" #endif P.S. There is also one way how to generate warning. Create unreferenced labe like HereIsMyWarning: and don't reference it. During compilation
in it's place so we wouldn't lose track of the change.It's easy in gcc. You simply say:#warning FIXME: Code removed because...So that's me sorted for Linux and MacOS. I'm happy in the Fun Place.But in the Dark Place I was clueless. How do you say #warning to Visual Studio? You can happily write #warning in C#, but not C++.Interestingly, the answer fell below my Google/Boredom Threshold (i.e. a web search didn't reveal the answer in sufficient few clicks that I lost interest). I just shoved in a run-time assertion instead. It'd do the job, but not as immediately as I would have liked.Thanks to hashpling and the miracle that is Twitter, I now know the answer, and share it with you in the vein hope it might come higher up the Google rankings for those poor souls that follow me:#pragma message ("FIXME: Code removed because...")Needless to say, this is all tediously non-standard.For bonus pointsThis still doesn't get us exactly the same behaviour as gcc's #warning. The message is produced, but without file and line information. This means that if you double-click the message in the VS IDE it will not jump to the warning in the editor window. It also means that build logs aren't much use.Sam Saariste pointed this out, and here's the standard preprocessor mumbo-jumbo you have to jump through to get the exact warning behaviour I was after:#define STRINGIZE_HELPER(x) #x#define STRINGIZE(x) STRINGIZE_HELPER(x)#define WARNING(desc) message(__FILE__ "(" STRINGIZE(__LINE__) ") : Warning: " #desc)// usage:#pragma WARNING(FIXME: Code removed because...)Couldn't be simpler, could it?! Posted by Pete Goodliffe at 04:00 Labels: c++, code 8 comments: codemonkey_uk said... It's a shame you can't #define a #pragma, or you could take this to it's logical conclusion:#define STRINGIFY(x) #x#define TOSTRING(x) STRINGIFY(x)#define WARNING( txt ) __FILE__"(" TOSTRING(__LINE__) ") : warning: " txt#pragma message( WARNING( "a warning you can click on" ) ) 2 July 2009 at 05:48 Pete Goodliffe said... To be honest, it's a shame there's still no stan