Embedding macro values in strings

[Garrett Wollman]

Doug Gwyn will probably yell at me...


#define foo_bar(baz) "Line " #baz
#define foo() foo_bar(__LINE__)

I *think* that this will work; I can't remember the exact order of
application here, which was posted by one of the net.c.gurus a while
back.  It will work if the preprocessor expands __LINE__ before it
expands foo_bar().  [I.e., is the C preprocessor a lazy or non-lazy
evaluator?]  Someone might have quotations from the relevant sections
of the Standard?

-GAWollman

Garrett A. Wollman - wollman at emily.uvm.edu

Disclaimer:  I'm not even sure this represents *my* opinion, never
mind UVM's, EMBA's, EMBA-CF's, or indeed anyone else's.