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Re: Is it possible to expand macro just once?

From: Wolf
Subject: Re: Is it possible to expand macro just once?
Date: Tue, 13 Oct 2020 22:58:03 +0200

On 2020-10-12 07:24:22 -0500, Eric Blake wrote:
> In general, if the user is providing you text rather than something that
> should expand as a macro that needs further recursive interpretation, you
> should use defn() to get at that text:
> $ echo 'changequote([,])defn([foo])' | m4 -Dfoo=bar -Dbar=baz
> bar
> But keep in mind that defn does NOT perform any interpolation of $, which
> may introduce its own oddities if the user supplied a macro definition
> containing $ that you aren't expanding as a macro.

This works great, thanks a lot :)


There are only two hard things in Computer Science:
cache invalidation, naming things and off-by-one errors.

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