CODEWITHSUNDEEP
c++cvisual-c++
paleozogt
paleozogt

Reputation: 6573

#warning in Visual Studio

In gcc I can do compile-time warnings like this:

#if !defined(_SOME_FEATURE_)
   #warning _SOME_FEATURE_ not defined-- be careful!
#endif

But in Visual Studio this doesn't work. Is there an alternative syntax for #warning?

Upvotes: 12

Views: 14381

Answers (5)

Danny Parker
Danny Parker

Reputation: 1773

There is a good article here on how to achieve a similar effect to #warning in visual studio:

http://goodliffe.blogspot.co.uk/2009/07/c-how-to-say-warning-to-visual-studio-c.html

Edit: Here is the relevant section from the above link, however I do recommend reading the article.

#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...)

Upvotes: 8

Michael Dorgan
Michael Dorgan

Reputation: 12515

Another thought is template style compile time asserts. Boost has a whole selection of these if you are wanting to check compile time code errors.

Upvotes: 0

Jasper Bekkers
Jasper Bekkers

Reputation: 6809

Use #pragma message("Some message")

Upvotes: 14

Jerry Coffin
Jerry Coffin

Reputation: 490663

About the closest equivalent would be #pragma message, or possibly #error (the latter stops compilation, the former just prints out the specified error message).

Upvotes: 17

Michael Dorgan
Michael Dorgan

Reputation: 12515

#pragma WEIRD_VALUES_HERE

is the way I've always seen it done. M$ probably has the pragmas on their site somewhere.

Upvotes: 0

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