Re: Finding values ​​of the context macros inside Lua functions (=expansion inside Lua functions?)

[Jaroslav Hajtmar <hajtmar@gyza.cz>]

Thanx Wolfgang.
But I guess I was wrong to express..

I need to pass parameter  '\\macroI' to the function  and turn it up a 
inside luafunction  expand to its value.

Ie when \def\macroI{6}

Then I need when I make in your example \ctxlua{test("\\macroI")} get 
the result :
"The argument “6” is a positive number" and not result "The argument “6” 
is a string."

see: I modify your example :

\startluacode
function test(arg) -- use thirddata namespace for real functions
     if type(tonumber(arg)) == "number" then
         if tonumber(arg) > 0 then
             context("The argument \\quotation{%s} is a positive 
number",arg)
         else
             context("The argument \\quotation{%s} is a negative 
number",arg)
         end
     else
         context("The argument \\quotation{%s} is a string.",arg)
     end
end
\stopluacode






\starttext

\ctxlua{test("7")}

\ctxlua{test("-4")}

\ctxlua{test("text")}

\def\macroI{6}

\ctxlua{test("\macroI")}

\ctxlua{test("\\macroI")}


\stoptext


Dne 17.7.2011 14:19, Wolfgang Schuster napsal(a):
> Am 17.07.2011 um 14:01 schrieb Jaroslav Hajtmar:
>
>    
>> >  Hello all,
>> >  
>> >  For several hours trying to find solutions of problem.
>> >  
>> >  My minimal example (I mention it at the end of email)  for clear reasons show, that :
>> >  
>> >  7 is not number.
>> >  7 is number.
>> >  7is not number.
>> >  7is not number.
>> >  
>> >  In the first is argument '\value' negotiable to the value, in second it is not possible (but for clear reasons too).
>> >  
>> >  I would need to find from  argument ie macro '\\value'  in the LUA function its numerical value.
>> >  Is there any function that would do that?
>> >  
>> >  I need something as a function of context (...), which would, however, its output is not located into ConTeXt, but its result get to back to a Lua function or into variable.
>> >  It is something like the expansion of an existing ConTeXt macro to its value.
>>      
> \startluacode
> function test(arg) -- use thirddata namespace for real functions
> 	if type(tonumber(arg)) == "number" then
> 		if tonumber(arg)>  0 then
> 			context("The argument \\quotation{%s} is a positive number",arg)
> 		else
> 			context("The argument \\quotation{%s} is a negative number",arg)
> 		end
> 	else
> 		context("The argument \\quotation{%s} is a string.",arg)
> 	end
> end
> \stopluacode
>
> \starttext
>
> \ctxlua{test("7")}
>
> \ctxlua{test("-4")}
>
> \ctxlua{test("text")}
>
> \stoptext
>
> Wolfgang
>
>
>    

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