debug function -> noop

[John Hunter]

In C++, what is the best what to define a function / macro / template
which will print a string to std::cout if a flag is set, but generate
no code otherwise. In my code I want to be able to do something like

DEBUG_PRINT("some string");

but I want to define DEBUG_PRINT in such a way that code is
conditionally generated.

Thanks!
John Hunter

 

[Gernot Frisch]

In C++, what is the best what to define a function / macro / template
which will print a string to std::cout if a flag is set, but generate
no code otherwise. In my code I want to be able to do something like

DEBUG_PRINT("some string");

but I want to define DEBUG_PRINT in such a way that code is
conditionally generated.

Thanks!
John Hunter

#ifdef _DEBUG
#define DEBUG_PRINT(a) std::cout << (a)
#else
#define DEBUG_PRINT(a)
#endif

 

[Peter van Merkerk]

#ifdef _DEBUG
#define DEBUG_PRINT(a) std::cout << (a)
#else
#define DEBUG_PRINT(a)
#endif

I believe using the NDEBUG macro would be a bit more standard way to do
it. The standard does mention NDEBUG, but doesn't mention _DEBUG.

 

[Gernot Frisch]

I believe using the NDEBUG macro would be a bit more standard way to
do

it. The standard does mention NDEBUG, but doesn't mention _DEBUG.

Sorry, must be one of the MS specifics I trapped into...
Thank you,
Gernot