[arinv1618beta]

Hi Group!

I have a doubt about blackberry preprocessing. I am using eclipse and maintaining a codebase which is compatible with both touch based devices and qwerty devices.
Now the well known problem with eclipse is... when you change the blackberry installed component of 4.5, it started showing out compilation errors for touch specific API parts even though I put them inside preprocessor blocks. Note that the same code dont give any error in JDE when compiled under 4.7 and 4.5.

I followed a tip which block comments the //#ifdef with two blocks of //ifndef.

Basically

//#ifdef MY_FLAG
my logic
//#endif

turned into

//#ifndef
/*
//#endif
mylogic
//#ifndef
*/
//#endif

so that the eclipse ignores the touch based code in 4.5 components.



now I have a question,

suppose I have a if-else block of preprocessor like this:

//#ifdef MY_FLAG
my logic for touch
//#elseif
my logic for qwerty
//#endif

can I rewrite this stuff like this:

//#ifndef MY_FLAG
/*
//#endif
my logic for touch
//#ifndef
*/
//#endif

//#ifndef MY_FLAG
my logic for qwerty
//#endif

so that instead of 1 if-else block, there are 2 if blocks now. Will there be any performance issue due to this? Basically, are they the same?

[NJBlackBerry]

Moved to Developer Forum

[Dougsg38p]

There is no runtime performance issue with preprocessor directives - the excluded code does not appear in the compiled object, so it is not a factor.

[arinv1618beta]

Thanks. That was exactly what I was looking for!