'__LINE__ and __FILE__ - (nf)' - (nf)

[notes at fortune.UUCP]

#R:ihlpf:-20100:fortune:16200010:000:345
fortune!olson    Nov  2 23:37:00 1983

This is not part of the compiler at all, but part of the pre-
processor cpp.  They do not 'contain' anything, but are useful
MACROS (sometimes) for doing debugging.  Look at the assert(3) macros
for example (at least on the 4.1 bsd machines).  I believe this
was even around on some of the V7 cpp's.
	Dave Olson {harpo,ihnp4,hpda}!fortune!olson