[metapost] Bug? Parsing def := := enddef;

[Boguslaw Jackowski]

Hi,

Nicola:
> according to The METAFONTbook, a macro definition can be 'def' followed 
> by a symbolic token followed by either = or :=.
[...]
> But the following gives an error:
> This is MetaPost, version 1.208 (kpathsea version 3.5.7dev)
> **\relax
> 
> *def := := enddef;
> ! Missing `=' has been inserted.
> <to be read again> 
>                    :=
> <*> def := :=
>               enddef;
> ? 
> That looks like a small bug.

Not sure. MF behaves similarly:

   This is METAFONT, Version 2.71828 (Web2c 7.5.2) (base=mf 2006.4.9)  21 JAN 2010 13:06
   (c:\TeXLive/texmf/web2c/cp8bit.tcx)
   **zz.mf
   (zz.mf
   ! Missing `=' has been inserted.
   <to be read again>
                    :=
   l.1 def := :=
               enddef;

Was this behavior reported to Knuth?

Cheers -- Jacko

-- 
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  Bogus\l{}aw Jackowski: B_Jackowski at GUST.ORG.PL
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