mailing-list for TeXmacs Users

["Sam Liddicott" <address@hidden>]

Well... I worked out that if I am going to use unquote* it doesn't 
matter if I return a concat or a tuple.

Sam

On 06/04/11 17:03, Sam Liddicott wrote:
> Hmmm... get-label on x this macro is: concat
>
> <assign|jags|<macro|c|<quasi|<with|x|0|xpoints||<while|<less|<value|x>|7>|<append-tuple|xpoints|<tuple|<point|<value|x>|<mod|<value|x>|2>>>><assign|x|<plus|<value|x>|1>>><inactive|<assign|points|<value|xpoints>>>>><value|>>> 
>
>
> <quasi|<assign|x|<unquote|<jags|>>>>
>
> I see why.... I see how hard it is to make a macro that actually 
> returns a tuple. I wonder if I really need functions... and not macros...
>
> so if I can't get a macro to return the cline, i try to get it to call 
> the cline:
>
> <assign|do-thing|<macro|c|t|<quasi|<compound|<arg|c>|<unquote*|<arg|t>>>>>> 
>
>
> <do-thing|cline|<tuple|<point|2|2>|<point|3|3>|<point|1|0>>>
>
> but it merely returns the text:
> <compound|cline|.....>
>
> However this works.... but is hard wired to cline:
>
> <assign|jags|<macro|c|<with|x|0|xpoints||<while|<less|<value|x>|7>|<append-tuple|xpoints|<tuple|<point|<value|x>|<mod|<value|x>|2>>>><assign|x|<plus|<value|x>|1>>><quasi|<cline|<unquote*|<value|xpoints>>>>>>> 
>
> I want to tell it what to call...
>
> I'll keep thinking
>
>
> On 06/04/11 16:39, Sam Liddicott wrote:
> > This texmacs draws a triangle
> >
> > <assign|x|<tuple|<point|2|2>|<point|3|3>|<point|1|0>>>
> >
> > <quasi|<cline|<point|0|0>|<point|1|1>|<unquote*|<value|x>>>>
> >
> > I have a macro "jags" which returns a tuple of points that might be 
> > used by cline to make a jagged line.
> >
> > <assign|append-tuple|<macro|name|t|<if|<equal|<get-label|<value|<arg|name>>>|tuple>|<assign|<arg|name>|<merge|<value|<arg|name>>|<arg|t>>>|<assign|<arg|name>|<arg|t>>>>> 
> >
> >
> > <assign|jags|<macro|c|<with|x|0|xpoints||<while|<less|<value|x>|7>|<append-tuple|xpoints|<tuple|<point|<value|x>|<mod|<value|x>|2>>>><assign|x|<plus|<value|x>|1>>><value|xpoints>>>> 
> >
> >
> > Sadly, cline does not take a tuple, but using the output of the macro 
> > "jags" keeps causing a segfault:
> >
> > <assign|x|<jags|>>
> > <quasi|<cline|<point|0|0>|<point|1|1>|<unquote*|<value|x>>>>
> >
> > or
> >
> > <quasi|<assign|x|<unquote|<jags|>>>>
> > <quasi|<cline|<point|0|0>|<point|1|1>|<unquote*|<value|x>>>>
> >
> > both crash texmacs.
> >
> > but not using jags but a tuple directly works and draws the triangle:
> >
> > <assign|x|<tuple|<point|2|2>|<point|3|3>|<point|1|0>>>
> > <quasi|<cline|<point|0|0>|<point|1|1>|<unquote*|<value|x>>>>
> >
> > Any tips?
> >
> > Judicious use of get-label shows that for both of these:
> > <quasi|<assign|x|<unquote|<jags|>>>>
> > <assign|x|<jags|>>
> >
> > x is a "with" and not a "tuple"
> >
> > This is clearly the contents of the jags macro showing up - whose 
> > first item is a "with" clause
> >
> > I cannot work out why: <quasi|<assign|x|<unquote|<jags|>>>>
> > did not evaluate jags but rather just fetches it's definition
> >
> > Sam


--
[FSF Associate Member #2325] 
<http://www.fsf.org/register_form?referrer=2325>

<http://www.openrightsgroup.org/>