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Post your question and get tips & solutions from a community of 418,551 IT Pros & Developers. Say:- #define firstdef #define seconddef If no defines are present or only one is present all is OK. How can I force a compile time error, if particular types of methods (all the methods that retun void) are annotated with MyCustomAnnotation? I'm afraid I may have misled you somehow. > Are you sure you didn't see these license things happen at design-time and > not runtime?

more stack exchange communities company blog Stack Exchange Inbox Reputation and Badges sign up log in tour help Tour Start here for a quick overview of the site Help Center Detailed I wouldn't, personally, worry about must_be_specialized_for_this_type gaining a definition from somewhere, but you could use a forward declaration to squirrel it away in a private namespace if you really wanted. Framing "standalone" class output with "framed" and others Removing elements from an array that are in another array Block for plotting a function using different parameters Does an index have a What is the difference between a crosscut sled and a table saw boat?

Does cleveref provide this? Then change the signature to; void doSomethingIncredible(AwesomeAndAmazingClass amazingObject) That will prevent the call to the method for objects that are simply awesome but not amazing. The unmatched apostrophe violates this requirement. My "dependent" trick above doesn't work either, because you can't pass a local type as a template type argument in C++03.

If you have code that has to use an int (as opposed to a user-specified data type such as int16), and the code assumes that an int is 16 bits, you In a Java class, I have a method as: public void myMethod(){....} If an attempt is made to annotate myMethod, then show a compile time error (red X in the IDE). The compiler couldn't possibly know, for instance, that the property on your control is being set by a piece of code in another assembly not in the solution. The example above has a hole in that somebody could stubbornly define an intentional_error nested type or member typedef (though I'd say they would then deserve whatever problems come up as

Is this possible? #if defined firstdef && defined seconddef #error "Both firstdef and seconddef are defined" #endif -- Army1987 (Replace "NOSPAM" with "email") A hamburger is better than nothing. asked 4 years ago viewed 253 times active 4 years ago 12 votes · comment · stats Related 25How to get more complete references5References to lists in theorem-like environments/writing # symbol I'm not sure. Anyone?

Register Forum Archives Web Design and Development Web Programming Languages ASP.NET ASP.NET Building Controls Force Compiler Error/Warning Within Custom Control Force Compiler Error/Warning Within Custom Control - ASP.NET Building Controls I I don't know if that's possible, it is? Why are Spanish adverbs formed using the feminine? Sep 24 '07 #9 P: n/a Army1987 On Mon, 24 Sep 2007 06:27:41 -0700, Eliot wrote: I have a project which may be compiled with some #defines.

Hot Network Questions Review paper/book on Finite Difference Methods for PDEs Make all the statements true Developing web applications for long lifespan (20+ years) Is there any job that can't be The one situation in which I know of a compiler having anything at all to do with something we typically thing of as runtime is in the case of attributes in What sense of "hack" is involved in five hacks for using coffee filters? If so, define "initialization", realizing that you have to define it in a way that you can explain to a compiler.

Not the answer you're looking for? cross-referencing cleveref share|improve this question edited Oct 19 '11 at 16:31 diabonas 17.4k264109 asked Oct 19 '11 at 16:24 Tim Schumacher 262 Usually just use \PackageError{}{}{

It's better to use a valid string literal: #error "Don't do this!" Amusingly, Richard Tobin suggested something very similar: #error Mustn't define both -- Keith Thompson (The_Other_Keith) ks*** San Diego Example 1 Some floating-point code requires at least 12 digits of resolution to return the correct results. How would the compiler know if the property wasn't set? I've found three general areas in which this problem can arise and #error can help.

I guess that, in order to achieve what you want, you would have to change the compiler so your annotation would be known by it. This is something. Fix before using *** Thus, if I forget that I haven't done the necessary work, an inadvertent attempt to use the file will result in just about the most meaningful compiler The user of this code will then be stuck with trying to work out what must be done to get the module to compile.

How-ToArticles Books Coding Standard Glossary Webinars Skills Tests Surveys BlogsNews Barr Code Coding Standards Device Security Expert Witness Software Safety Registration for Fall Training Courses Now Open. Pronuncia strana della "s" dopo una "r": un fenomeno romano o di tutta l'Italia? etc etc etc. \end{definition} and I do not want the \requires{def A} to actually produce output but just enforce that there was somewhere above a \label{def A}. up vote 10 down vote favorite I would like to create a compile-time error in my C++ code with a custom error message.

share|improve this answer edited Oct 13 '10 at 19:19 answered Oct 13 '10 at 18:36 Vinzenz 2,2661021 3 Those will assert unconditionally, all the time. (That is, the compiler will The 3x3 Hexa Prime Square Puzzle Are RingCT signatures malleable? Sep 24 '07 #3 P: n/a Roberto Waltman Eliot I have a project which may be compiled with some #defines.Say:-#define firstdef#define seconddefIf no defines are present or only one is The code seems to tell me my reference is undefined regardless of whether or not I put the label above.

Largest number of eɪ sounds in a word If Dumbledore is the most powerful wizard (allegedly), why would he work at a glorified boarding school? The problem with this code is that a user of the code doesn't know (without explicitly examining the code) that OPT_1 is a valid compiler switch. Anyone? more stack exchange communities company blog Stack Exchange Inbox Reputation and Badges sign up log in tour help Tour Start here for a quick overview of the site Help Center Detailed

Now tell me, don't you agree that #error is a really useful part of the preprocessor, worthy of your frequent use-and occasional praise? That happens at >> run-time. > > I'm not sure. This is not a constant integral expression thus the solution would be very different. Digital Diversity Is 'if there's any' grammatical in this sentence?

That way, I'd know there's > a problem before the project was even built. > > Thoughts? If a ' or a " character matches the last category, the behavior is undefined. That's what I'm trying to work through in my head at the > moment. > > I've evaluated components that throw a compiler error if, say, an > evaluation period has compiler error msg..

Trouble understanding charging capacitor on bridge rectifier Is accuracy binary? I suggest you limit yourself to runtime validation of property values. That allows interesting combinations of inheritance and templates. How can I make GCC raise a compilation error if no result is returned? (these are usually trivial situations, where there is no return statement in a method) c++ gcc share|improve

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