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["Sam Liddicott" <address@hidden>]

Wahey - the macro examples using unquote* lead me to this:

<quasi|<tree|J|<unquote*|<jags>>>>

quite niftily shows the answer, which is:

<quasi|<cline|<unquote*|<jags>>>>

I hadn't realised that unquote* could work on non-arg!

So now I know that quasi...unquote*
is used to strip the label from a tree and return the sub-expressions

(what you can do while waiting for things to download)

Sam


On 15/03/11 08:49, Sam Liddicott wrote:
> If I have a tuple whose members are to be the arguments of a macro, 
> how do I express this?
>
> For instance, I have a tuple which is a list of points that I want to 
> pass to cline
>
> I've tried:
>
> <assign|jags|<macro|<tuple|<point|5.26538|24.5758>|<point|14.155443841778|24.2794681836222>|<point|12.2927635930679|26.9041539886228>|<point|11.4460907527451|26.0574811483>|<point|10.1337478502447|27.2851567667681>|<point|9.20240772588967|26.3114830003969>|<point|7.0010583410504|28.174163249107>|<point|6.06971821669533|25.8458129382193>|<point|4.37637253604974|27.2004894827358>>>> 
>
>
> <assign|jag|<macro|<merge|<tuple|<compound|cline>>|<jags>>>>
>
> <jag>
>
>
> But it's not quite the right thing to draw the cline - after all it 
> returns a tuple
>
> The nearest I have seen is map-args but of course it doesn't cross the 
> args boundary. I'm trying various use of the eval family but I can't 
> see how they could make success...
>
> Sam


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