- You added pragma once to all files in project and this confused me a little bit. Let me explain, how i see #pragma once - according to wiki: “#pragma once...
- So, instinctively, we can think that the #pragma once directive does the job of a header guard, but with only one line and without having to think of a macro name.
- Bu sayfanın açıklaması webmaster tarafindan gizlenmiştir.
- Adding this directive at the beginning of the header file means: this header file is only compiled once #pragma once is guaranteed by the compiler...
- In fact when you add a new file and choose header in Visual Studio, it put the #pragma once in automatically for you!
- So, I became curious again, why #pragma once is ignored... Here is my compilation log file. In every header file I have #pragma once at the top.
- For example, my problem is “DialogueSubtitleEditorUI.generated.h already included, missing “#pragma once” in DialogueSubtitleEditorUI.h”, and this...
- Whereas include guards would still protect from double definitions, #pragma once may or may not treat them as the same file in a compiler-dependent way.
- MSDN encourages developers to use `#pragma once` directive (https://msdn.microsoft.com/en-us/library/4141z1cx.aspx).
- You can use both #pragma once and include guards to write portable code that can also take advantage of #pragma once optimizations the compiler may support