[metapost] Bug report on metapost from texlive-2013

Taco Hoekwater taco at elvenkind.com
Wed Jan 29 16:34:35 CET 2014

On 29 Jan 2014, at 15:22, Taco Hoekwater <taco at elvenkind.com> wrote:

> Hi,
> On 27 Jan 2014, at 21:39, Pétiard François <petiard.francois at free.fr> wrote:
>> I think the problem is operator precedence
> Almost. The problem is the handling of the primitive spark “/“ at the 
> end of a primarydef’s macro, when the next token is not a known 
> numeric. 
> The smallest erroneous case I could find was this one:
>  a := 2**2/(3); % should give 1.333, but actually gives 3
> and it is caused by the special precedence level associated with the 
> "/<literal numeric>” construct (as used in e.g. 2/3a). There is code in
> metapost that does a bit of backtracking in that case, and it is that
> backtracking code that fails to push back the / operator properly. 
> Now I only have to figure out how to fix it !

Should be fixed in trunk now. Output in png mode attached (minus labels, 
my current machine cannot run makempx).

Best wishes,

More information about the metapost mailing list