Re: Macro defining macros...

[Carlo Contavalli]

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On Fri, Feb 04, 2005 at 02:03:43PM +0000, Gary V. Vaughan wrote:
> macro1
>   => define(`macro2', `macro1 -- -- ')
>   =>
> macro2(foo, bar)
>   => macro1 -- --
>   => define(`macro2', `macro1 -- -- ') -- --
>   =>  -- --
> 
> You can defer the expansion by obfuscating the parameters:
> 
> define(`macro1', `define(`macro2', `$'`0 -- $'`1 -- $'`2')')
> macro1
>   => define(`macro2', `$0 -- $1 -- $2')
>   =>
> macro2(foo, bar)
>   => macro2 -- foo -- bar
>   => macro2 -- -- -- foo -- bar
>   => macro2 -- -- -- -- -- foo -- bar
>   => ...
> 
> You can fix the infinite loop with a pushdef, or changequote.
ok thx :) by now, I figured it out by myself. Well, at least
I now know it is the right way to go :) I thought it was some
kind of hack.

Cheers, 
Carlo

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