On 4/21/2014 8:53 AM, Gary V. Vaughan wrote:
For the record, the syntax I briefly implemented simply involved defining a
macro
with a parameter list, and then referring to parameters by name in the body of
the
macro:
m4_define(`exch (parm1, parm2)', `$parm2 $parm1')
exch(`foo', `bar')
bar foo
It's still something I'd like to have one day, but I'm not sure I like that
syntax...
Cheers,
Actually, that syntax looks reasonable to me. Your syntax is certainly
better than the suggestion I made, which I find confusing. At first
glance, your syntax seems pretty clear. And it's good that it resembles
the cpp syntax:
#define EXCHANGE(arg1, arg2) arg2 : arg1
EXCHANGE(Arg #1, Arg #2)
I imagine adding new capabilities to m4 is a huge amount of detailed
work. Thank you for answering my newbie question. I might have some
other questions in the future, as I explore m4.
I previously used cpp, sed, and "htp" for various text pre-processing
tasks I'm mostly moving over to m4. I wish I had learned m4 before.
Thank you for having this discussion group.
Daniel
