Is there anything equivalent to #pragma once for Codegear RAD Studio 2009?
I am using the precompiled header wizard and I would like to know if it is still necessary to use include guards when including header files?
views:
107answers:
2Excellent. The installed help must have been out of date.
Seth
2010-02-09 06:32:57
Please note that support for #pragma once was only added in C++Builder 2010 and was not available in C++Builder 2009 and earlier.
David Dean - Embarcadero
2010-02-09 16:29:24
oh in that case - unmarking as correct answer. @David you should post that comment as the correct answer.
Seth
2010-02-09 22:49:01
@David see follow up question regarding if 2009 has header-include-guard-optimisation, even though it doesn't use the `#pragma once` directive. http://stackoverflow.com/questions/2233401/are-redundant-include-guards-necessary
Seth
2010-02-10 00:11:08
+3
A:
Support for #pragma once was added in C++Builder 2010 In C++Builder 2009 and earlier, the unknown pragma will simply be ignored. I would suggest using
#ifndef X
#define X
//code
#endif
style header guards in the versions of C++Builder that do not support #pragma once.
David Dean - Embarcadero
2010-02-10 17:26:45