On Sun, Nov 14, 2010 at 06:55:20PM +0100, Hans van der Meer wrote:
> In transforming dates through a Lua-call I get a nil error I do not
> understand.
>
> The luatex code =
> \startluacode
> hvdm = hvdm or {}
> require "lpeg"
> -- Transform date in Lua from yyyymmdd to dd-mm-yyyy with checks
> hvdm.day = lpeg.R("02") * lpeg.R("09") + lpeg.P("30") + lpeg.P("31") -
> lpeg.P("00")
> hvdm.month = lpeg.P("0") * lpeg.R("19") + lpeg.P("10") + lpeg.P("11") +
> lpeg.P("12")
> hvdm.year = lpeg.R("12") * lpeg.R("09") * lpeg.R("09") * lpeg.R("09")
> hvdm.date = lpeg.C(hvdm.year) * lpeg.C(hvdm.month) * lpeg.C(hvdm.day) *
> -1 / "%3-%2-%1"
> \stopluacode
> \def\FormatDate#1{\ctxlua{tex.print(tostring(hvdm.date:match(#1)))}}
>
> Calling \FormatDate(1) is OK although it returns "nil" (correct would be #1 =
> 20101114
> Calling \FormatDate(A) is not OK with the error:
You are passing a undefined variable, A. Your argument should be quoted:
hvdm.date:match("#1")
Regards,
Khaled
--
Khaled Hosny
Arabic localiser and member of Arabeyes.org team
Free font developer
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