Pragma in define macro

Question

Is there some way to embed pragma statement in macro with other statements?

I am trying to achieve something like:

#define DEFINE_DELETE_OBJECT(type)                      \     void delete_ ## type_(int handle);                  \     void delete_ ## type(int handle);                                                \     #pragma weak delete_ ## type_ = delete_ ## type 

I am okay with boost solutions (save for wave) if one exists.

Answer 1

If you're using c99 or c++0x there is the pragma operator, used as

_Pragma("argument") 

which is equivalent to

#pragma argument 

except it can be used in macros (see section 6.10.9 of the c99 standard, or 16.9 of the c++0x final committee draft)

For example,

#define STRINGIFY(a) #a #define DEFINE_DELETE_OBJECT(type)                      \     void delete_ ## type ## _(int handle);                  \     void delete_ ## type(int handle);                   \     _Pragma( STRINGIFY( weak delete_ ## type ## _ = delete_ ## type) ) DEFINE_DELETE_OBJECT(foo); 

when put into gcc -E gives

void delete_foo_(int handle); void delete_foo(int handle); #pragma weak delete_foo_ = delete_foo  ; 

Answer 2

One nice thing you can do with _Pragma("argument") is use it to deal with some compiler issues such as

#ifdef _MSC_VER #define DUMMY_PRAGMA _Pragma("argument") #else #define DUMMY_PRAGMA _Pragma("alt argument") #endif