What code have you written with #pragma you found useful? [closed]

Answer 1

With VC, I have used this in the past:

#define STRINGIFY( L )       #L
#define MAKESTRING( M, L )   M(L)
#define SHOWORIGIN           __FILE__ "("MAKESTRING( STRINGIFY, __LINE__) "): "

// then, later...

#pragma message( SHOWORIGIN "we need to look at this code" )
// ...
#pragma message( SHOWORIGIN "and at this, too" )

Output:

c:\...\test.cpp(8): we need to look at this code
c:\...\test.cpp(10): and at this, too

You can double-click on it in the output pane and the IDE takes you to the right file and line.