[metapost] A small problem with "--numbersystem=double"

[Paul Pichaureau]

Hi!

This time it's not a bug, but an apparently strange behavior of metapost.

The following definition is very basic in computer modern sources :

vardef stroke text t =
    hide(forsuffixes e = l,r: path_.e:=t; endfor;)
    ((path_.l) ..  (reverse (path_.r)) .. cycle)
enddef;

The following code simulates a pen stroke between two points:

pair p[].l, p[].r;
p1.l = (0,0);
p1.r = (10,10);
p2.l = (100,0);
p2.r = (100,100);

beginfig(1);
  draw stroke (p1.e+p2.e) -- (p2.e);
endfig;
end.


The preceding code works perfectly fine with mpost, but leads to an error
with

    mpost --numbersystem=double

I think the problem came from

(p1.e+p2.e) -- (p2.e);

where "1e.+" is read by metapost as the begining of a number.

It's not a bug, just a point to take in account in future codes.


Cheers

-- 
 Paul Pichaureau
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