what's the meaning of #define here?
Author
Hello there,
What's the meaning of #define END_ENGINE_NAMESPACE below:
#define DECLARE_ENGINE_NAMESPACE namespace bbe { #define END_ENGINE_NAMESPACE }
I know that DECLARE_ENGINE_NAMESPACE would be replaced wth namespace bbe { #define END_ENGINE_NAMESPACE } everytime we use DECLARE_ENGINE_NAMESPACE.
The author has used the following code inside the files:
DECLARE_ENGINE_NAMESPACE
//He has written his code here, for example he has defined a class
END_ENGINE_NAMESPACE
Is it equivalent with:
namespace bbe
{
//He has written his code here, for example he has defined a class
}
But if yes, how #define END_ENGINE_NAMESPACE cause it here?
Regards,
Ehsan
Those two #define statements should be on separate lines.
As you've deduced, all these macros are doing is opening and closing a namespace scope. Although justifiable in some niche circumstances -- such as needing to compile as C, which I don't believe to be the case here -- this is, in general, an extremely poor and improper use of macros, so I don't recommend you follow the example set by the author of this code.
As you've deduced, all these macros are doing is opening and closing a namespace scope. Although justifiable in some niche circumstances -- such as needing to compile as C, which I don't believe to be the case here -- this is, in general, an extremely poor and improper use of macros, so I don't recommend you follow the example set by the author of this code.
I have also seen it used for namespace versioning (i.e. the Fbx SDK does this). Basically it just generates,
namespace FBX_SDK_20_11_2006 {
namespace FBX_SDK_20_06_2008 {
etc. But i agree with jpetrie, it's a sucky way to program.
namespace FBX_SDK_20_11_2006 {
namespace FBX_SDK_20_06_2008 {
etc. But i agree with jpetrie, it's a sucky way to program.
Author
thanks,
BTW, this code is from the book "Ultimate 3D game engine design and architecture" by Allen Sherrod. He has written a cross platform code in this book.
BTW, this code is from the book "Ultimate 3D game engine design and architecture" by Allen Sherrod. He has written a cross platform code in this book.
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