Hello, my observation: --- \starttext AAA \startluacode a = 10 context(a) -- a = 20 context(a) \stopluacode \stoptext --- - works OK, 'AAA', '10' and '20' is printed. If I modify the code: --- \starttext AAA \startluacode a = 10 context(a) -- a = 20 context(a) % a = 30 context(a) \stopluacode \stoptext --- - I get an error: ! LuaTeX error <main ctx instance>:11: unexpected symbol near '%'. So it seems to me that '--' works fine to start a comment but '%' doesn't (?). Lukas NB: ConTeXt ver: 2010.09.29 23:37 MKIV fmt: 2010.9.30 int: english/english On Sun, 03 Oct 2010 08:33:23 +0200, Wolfgang Schuster wrote:

Am 03.10.2010 um 01:46 schrieb Aditya Mahajan:

...

Hi,

The following snippet

\startluacode -- \undefined why should a comment matter a = 10 \stopluacode

fails with

system > error on line 4 in file bug.tex: Undefined control sequence ... -- \undefined why should a comment matt a = 10 \dodostartluacode ...and \directlua \zerocount {#1 }} l.4 \stopluacode

Bug or limitation?

The comment character in the luacode environment is “%”.

Wolfgang

On 4-10-2010 9:19, Procházka Lukáš Ing. - Pontex s. r. o. wrote:

(Sorry, I've written bad information, now correcting (*)...)

Hello,

my observation:

--- \starttext AAA

\startluacode

a = 10

context(a)

-- a = 20

context(a)

\stopluacode \stoptext ---

- works OK, 'AAA', '10' and '10' (*) is printed.

If I modify the code:

--- \starttext AAA

\startluacode

a = 10

context(a)

-- a = 20

context(a)

% a = 30

context(a)

\stopluacode \stoptext ---

- I get an error:

! LuaTeX error <main ctx instance>:11: unexpected symbol near '%'.

So it seems to me that '--' works fine to start a comment but '%' doesn't (?).

indeed. but string.format("%0.3f %0.3f",a,b) does as does context("%0.3f %0.3f",a,b) so the % is just a normal token Hans ----------------------------------------------------------------- Hans Hagen | PRAGMA ADE Ridderstraat 27 | 8061 GH Hasselt | The Netherlands tel: 038 477 53 69 | voip: 087 875 68 74 | www.pragma-ade.com | www.pragma-pod.nl -----------------------------------------------------------------

Am 03.10.2010 um 10:28 schrieb luigi scarso:

...

Bug or limitation? Limitation, but it should be doable to remedy in TeX.

Possible but is it worth the effort, when you start with “--” the percent should also behave like in Lua etc. \starttext \bgroup\obeylines \gdef\texcomment#1 {} \egroup \bgroup \let\letterhyphen=- \catcode`-=13 \unexpanded\def-{\futurelet\next\doscanhyphen} \def\doscanhyphen {\ifx\next- \expandafter\texcomment \else \expandafter\letterhyphen \fi} \obeylines text text % foo - foo 1 -- foo 2 \normalexpanded{- foo 1} \normalexpanded{-- foo 2} text \egroup \stoptext Wolfgang