Finding values of the context macros inside Lua functions (=expansion inside Lua functions?)
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. Thanx Jaroslav Here is my minimal example: \startluacode function test(arg) if type(arg)=='number' then context(arg.." is number.\\par ") else context(arg.." is not number.\\par") end if type(tonumber(arg))=='number' then context(arg.." is number.\\par ") else context(arg.." is not number.\\par") end end \stopluacode \starttext \def\value{7} \ctxlua{test('\value');} \blank[big] \ctxlua{test('\\value');} \stoptext
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
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
Am 17.07.2011 um 14:42 schrieb Jaroslav Hajtmar:
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.
Not possible.
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."
That’s odd because for me \ctxlua{test("\macroI")} results in The argument “6” is a positive number. and \ctxlua{test("\\macroI")} in The argument “6” is a string. Wolfgang
Wolfgang, Me too. This is because the parameter '\macroI' is evaluated as a number, but the parameter '\\macroI' is in fact really a string - the name of a context macro. context (...) command properly put correctly content of the '\macroI' macro into the ConTeXt, but without knowledge of his contents ... If you write that:
Not possible.
then it's not for me very good news, because I thus probably not my module to process only at the Lua language ... Thanx Jaroslav... Dne 17.7.2011 14:53, Wolfgang Schuster napsal(a):
Am 17.07.2011 um 14:42 schrieb Jaroslav Hajtmar:
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.
Not possible.
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."
That’s odd because for me
\ctxlua{test("\macroI")}
results in
The argument “6” is a positive number.
and
\ctxlua{test("\\macroI")}
in
The argument “6” is a string.
Wolfgang
Am 17.07.2011 um 15:10 schrieb Jaroslav Hajtmar:
then it's not for me very good news, because I thus probably not my module to process only at the Lua language ...
You can’t expand macro from Lua but the following is possible: \startluacode values = { I = "1", II = "2", } function test(arg) if string.find(arg,"\\macro") then arg = string.gsub(arg,"\\macro","") if values[arg] then context(values[arg]) else context("Invalid index.") end else context("Invalid command.") end end \stopluacode \starttext \starttabulate \NC \type{\macroI} \EQ \ctxlua{test("\\macroI")} \NC\NR \NC \type{\macroII} \EQ \ctxlua{test("\\macroII")} \NC\NR \NC \type{\macroIII} \EQ \ctxlua{test("\\macroIII")} \NC\NR \NC \type{\foo} \EQ \ctxlua{test("\\foo")} \NC\NR \stoptabulate \stoptext Wolfgang
Thanx Wolfgang. It is a good example, which I will definitely come in handy sometimes, but unfortunately I can not help my problem to solve. Once again, many thanks Jaroslav Dne 17.7.2011 15:40, Wolfgang Schuster napsal(a):
You can’t expand macro from Lua but the following is possible:
\startluacode
values = { I = "1", II = "2", }
function test(arg) if string.find(arg,"\\macro") then arg = string.gsub(arg,"\\macro","") if values[arg] then context(values[arg]) else context("Invalid index.") end else context("Invalid command.") end end
\stopluacode
\starttext
\starttabulate \NC \type{\macroI} \EQ \ctxlua{test("\\macroI")} \NC\NR \NC \type{\macroII} \EQ \ctxlua{test("\\macroII")} \NC\NR \NC \type{\macroIII} \EQ \ctxlua{test("\\macroIII")} \NC\NR \NC \type{\foo} \EQ \ctxlua{test("\\foo")} \NC\NR \stoptabulate
\stoptext
Wolfgang
participants (2)
-
Jaroslav Hajtmar -
Wolfgang Schuster