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From: | Daniel Goldman |
Subject: | Re: named arguments in m4? |
Date: | Mon, 21 Apr 2014 15:18:01 -0700 |
User-agent: | Mozilla/5.0 (Windows NT 6.1; WOW64; rv:24.0) Gecko/20100101 Thunderbird/24.3.0 |
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
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