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Reply Gauthier says: September 2, 2011 at 3:01 am (about "easier to spot in the editor": that's where your #warning construct makes a big difference, although only visible at compile time.) Line continuations, backslash ('\') followed by a new-line character, may be used in preprocessor directives since these are removed by the preprocessor. This causes the value to be stored in memory, instead of being substituted by the preprocessor. Hack away at the code as much as I want, changing things, commenting code, whatever. 4.

The second edition of the C Standard, C99, added support for __func__, which contains the name of the function definition within which it is contained, but because the preprocessor is agnostic Line splicing: Physical source lines that are continued with escaped newline sequences are spliced to form logical lines. C compilers and programming environments all have a facility which allows the programmer to define where include files can be found. For example, the expression RADTODEG(r + 1) expands correctly as ((r + 1) * 57.29578); without parentheses,

#error In C

Get interrupted by something else that the boss says is more important. Browse other questions tagged c-preprocessor or ask your own question. Many implementations do not support trigraphs or do not replace them by default. Make will display the additional file and line information when possible.

If you do this and you have inadvertently left incomplete or debug code in the image, then your compilation will fail. If you look at the warning generated with #warning, you'll typically see a number associated with it. The line must consist of complete tokens. Gcc #warning Directive Not the answer you're looking for?

Test: bad second operand "op" error In a comparison, the second argument op could not be parsed. Gcc #message 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 Test: bad operator "op" error The op was not one of the acceptable logical operators &&, | | and = =. Creating 'makefile' from 'template' warning The makefile was initially empty and MKMF copies template into makefile.

Unterminated string warning A string on this line is unterminated. #error In C Example Haven't got time to concoct those macros right now, though! And to finally answer your question I generally use one branch per bug, the branch only lives as long as I'm actively working on the bug, and thus provides me with Page 96) the commands are written to a batch file and the batch file is then executed.

Gcc #message

Reply Leave a Reply Click here to cancel reply. Retrieved 1 May 2008. ^ Beal, Stephan (August 2004). "Supermacros". #error In C GNU CPP online manual Visual Studio .NET preprocessor reference Pre-defined C/C++ Compiler Macros project: lists "various pre-defined compiler macros that can be used to identify standards, compilers, operating systems, hardware architectures, #error C++ How to plot a graph from data Rosa Parks is a [symbol?] for the civil rights movement?

Maybe I am WTFD to figure it out. ~S Jul 22 '05 #4 P: n/a Shea Martin Dave O'Hearn wrote: Shea Martin wrote:I also tried #warn "my message", but this is A number-sign ('#') that appears alone on a line is interpreted as a null preprocessor directive. When you have a bunch of modified files you can choose to add/remove all or part of any changed file to/from the staging area. A common reference for these macros is the Pre-defined C/C++ Compiler Macros project, which lists "various pre-defined compiler macros that can be used to identify standards, compilers, operating systems, hardware architectures, C Preprocessor Message

Reply Gauthier says: September 28, 2011 at 3:55 am And that if you comment out 10 parts in your code, you get 10 warnings. Although I'm occasionally "guilty" of commenting out for debugging, I believe Nigel has it right. 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 Shell lines are indented from the left column by a tab or space character.

warning The template cannot be read, so the makefile starts out empty. #error Gcc Relevant to this case: - branching is very very cheap (Patrick is right, one branch per feature, per fix, per crazy idea you want to test) - merge actually works - Can't %do 'name' warning The %do directive specified a non-existing target name.

Either FIX_FOR_RELEASE() // Code that must be removed or fixed before you can release or FIX_FOR_RELEASE(statement that must be removed or fixed before you can release); share|improve this answer answered Feb

V Jul 22 '05 #2 P: n/a Dave O'Hearn Shea Martin wrote: I also tried #warn "my message", but this is not recognized my Sun's CPP. If the filename is enclosed within angle brackets, the file is searched for in the standard compiler include paths. else without if error An %else directive has occurred without a preceding %if. Error Directive Must Use C++ For The Type Iostream So you can develop software with commented out code, but when it is going to be released outside compilator will force you too clean all your #warnings.

The preprocessor simultaneously expands macros and, in the 1999 version of the C standard,[clarification needed] handles _Pragma operators. Privacy policy About Wikipedia Disclaimers Contact Wikipedia Developers Cookie statement Mobile view Next: C Preprocessor Directives NOT Up: Preprocessor directives Previous: #ifdef - #ifndef - #echo - #error The #echo and Other uses[edit] Since the C preprocessor can be invoked separately from the compiler with which it is supplied, it can be used separately, on different languages. If it is, the file is then included.

This is a warning unless the ".VCS_MODE : ErrorIfAbsent" directive was used, in which case this is an error. Retrieved 17 July 2016. ^ "1.3 Preprocessing and conditional compilation". The directory is either the value of the MAKE_TMP macro (if defined) or the current directory. Products Development Tools ARM C166 C51 C251 µVision IDE and Debugger Hardware & Collateral ULINK Debug Adaptors Evaluation Boards Product Brochures Device Database Distributors Downloads MDK-ARM C51 C166 C251 File

VCSTOUCH updates the file with the version control system timestamp as kept in VCS storage. Try using Make's memory miser (cf. With the "- x" command-line flag, this message is an error. Disabling support warning / error The SSDATA macro must be set before Make can access SourceSafe's data base.

C99 introduced a few standard #pragma directives, taking the form #pragma STDC ..., which are used to control the floating-point implementation. Instead I use this construct: void foo(void) { # if 0 /* Code to be temporarily removed is here */ #else #warning Temporary debug construct. Not enough memory to exec 'name' [ (ignored) | (keep working) ] error / report There is not enough memory for Make to execute the specified program called name. These include __FILE__ and __LINE__, predefined by the preprocessor itself, which expand into the current file and line number.

For an identifier declared to be a function-like macro, it is only replaced when the following token is also a left parenthesis that begins the argument list of the macro invocation. If it is, the file is then included. Retrieved 14 October 2015. This specification is used in error messages to identify the error position.

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