Remove math mode in macro defined text












3















I would like to remove the math mode in a text that is not defined directly, but in a macro. Here is my code:



documentclass{book}

begingroup
lccode`~=`$
lowercase{endgroup
def~#1~{ignorespaces}%
}
defremovemath{%
begingroup
catcode`$=active
removemathX
}
defremovemathX#1{%
#1
endgroup
}

edefnomath#1{
removemath{#1}
}

begin{document}

chapter{XXXXXX}
newcommandaaaa{AAA$^{1}$, BBB$^{2}$, CCC$^{3}$, DDD$^{4}$}
removemath{AAA$^{1}$, BBB$^{2}$, CCC$^{3}$, DDD$^{4}$}
removemath{aaaa}
nomath{aaaa}

end{document}


In this example, the first removemath works, but the second removemath and nomath does not work.
I am not sure why. Is it an expansion problem? Maybe something else?
Can someone suggest a solution?










share|improve this question


















  • 1





    removemath is using catcode changes so will only work at the top level, the characters in aaaa have already been tokenised so catcode changes have no effect. However it isn't clear why you are using catcode changes, you copuld use a delimited argument on a normal catcode $.

    – David Carlisle
    Jan 25 at 22:15


















3















I would like to remove the math mode in a text that is not defined directly, but in a macro. Here is my code:



documentclass{book}

begingroup
lccode`~=`$
lowercase{endgroup
def~#1~{ignorespaces}%
}
defremovemath{%
begingroup
catcode`$=active
removemathX
}
defremovemathX#1{%
#1
endgroup
}

edefnomath#1{
removemath{#1}
}

begin{document}

chapter{XXXXXX}
newcommandaaaa{AAA$^{1}$, BBB$^{2}$, CCC$^{3}$, DDD$^{4}$}
removemath{AAA$^{1}$, BBB$^{2}$, CCC$^{3}$, DDD$^{4}$}
removemath{aaaa}
nomath{aaaa}

end{document}


In this example, the first removemath works, but the second removemath and nomath does not work.
I am not sure why. Is it an expansion problem? Maybe something else?
Can someone suggest a solution?










share|improve this question


















  • 1





    removemath is using catcode changes so will only work at the top level, the characters in aaaa have already been tokenised so catcode changes have no effect. However it isn't clear why you are using catcode changes, you copuld use a delimited argument on a normal catcode $.

    – David Carlisle
    Jan 25 at 22:15
















3












3








3








I would like to remove the math mode in a text that is not defined directly, but in a macro. Here is my code:



documentclass{book}

begingroup
lccode`~=`$
lowercase{endgroup
def~#1~{ignorespaces}%
}
defremovemath{%
begingroup
catcode`$=active
removemathX
}
defremovemathX#1{%
#1
endgroup
}

edefnomath#1{
removemath{#1}
}

begin{document}

chapter{XXXXXX}
newcommandaaaa{AAA$^{1}$, BBB$^{2}$, CCC$^{3}$, DDD$^{4}$}
removemath{AAA$^{1}$, BBB$^{2}$, CCC$^{3}$, DDD$^{4}$}
removemath{aaaa}
nomath{aaaa}

end{document}


In this example, the first removemath works, but the second removemath and nomath does not work.
I am not sure why. Is it an expansion problem? Maybe something else?
Can someone suggest a solution?










share|improve this question














I would like to remove the math mode in a text that is not defined directly, but in a macro. Here is my code:



documentclass{book}

begingroup
lccode`~=`$
lowercase{endgroup
def~#1~{ignorespaces}%
}
defremovemath{%
begingroup
catcode`$=active
removemathX
}
defremovemathX#1{%
#1
endgroup
}

edefnomath#1{
removemath{#1}
}

begin{document}

chapter{XXXXXX}
newcommandaaaa{AAA$^{1}$, BBB$^{2}$, CCC$^{3}$, DDD$^{4}$}
removemath{AAA$^{1}$, BBB$^{2}$, CCC$^{3}$, DDD$^{4}$}
removemath{aaaa}
nomath{aaaa}

end{document}


In this example, the first removemath works, but the second removemath and nomath does not work.
I am not sure why. Is it an expansion problem? Maybe something else?
Can someone suggest a solution?







math-mode expansion






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asked Jan 25 at 22:12









Peter IvanyiPeter Ivanyi

273




273








  • 1





    removemath is using catcode changes so will only work at the top level, the characters in aaaa have already been tokenised so catcode changes have no effect. However it isn't clear why you are using catcode changes, you copuld use a delimited argument on a normal catcode $.

    – David Carlisle
    Jan 25 at 22:15
















  • 1





    removemath is using catcode changes so will only work at the top level, the characters in aaaa have already been tokenised so catcode changes have no effect. However it isn't clear why you are using catcode changes, you copuld use a delimited argument on a normal catcode $.

    – David Carlisle
    Jan 25 at 22:15










1




1





removemath is using catcode changes so will only work at the top level, the characters in aaaa have already been tokenised so catcode changes have no effect. However it isn't clear why you are using catcode changes, you copuld use a delimited argument on a normal catcode $.

– David Carlisle
Jan 25 at 22:15







removemath is using catcode changes so will only work at the top level, the characters in aaaa have already been tokenised so catcode changes have no effect. However it isn't clear why you are using catcode changes, you copuld use a delimited argument on a normal catcode $.

– David Carlisle
Jan 25 at 22:15












1 Answer
1






active

oldest

votes


















3














You can remove one formula at a time:



documentclass{book}

makeatletter
newcommand{removemath}[1]{%
expandafterremovemath@#1$$@nil
}
defremovemath@#1$#2$#3@nil{%
#1%
ifrelaxdetokenize{#3}relax
expandafter@gobble
else
expandafter@firstofone
fi
{removemath@#3@nil}%
}
makeatother


begin{document}

newcommandaaaa{AAA$^{1}$, BBB$^{2}$, CCC$^{3}$, DDD$^{4}$}

--removemath{AAA$^{1}$, BBB$^{2}$, CCC$^{3}$, DDD$^{4}$}--

--removemath{AAA$^{1}$, BBB$^{2}$, CCC$^{3}$, DDD}--

--removemath{AAA$^{1}$, BBB, CCC$^{3}$, DDD}--

--removemath{aaaa}--

end{document}


enter image description here



The same with a regular expression approach:



documentclass{book}
usepackage{xparse}

ExplSyntaxOn
NewDocumentCommand{removemath}{m}
{
peter_removemath:o { #1 }
}

cs_new_protected:Nn peter_removemath:n
{
tl_set:Nn l__peter_removemath_tl { #1 }
regex_replace_all:nnN { $ [^$]* $ } {} l__peter_removemath_tl
l__peter_removemath_tl
}
cs_generate_variant:Nn peter_removemath:n { o }
tl_new:N l__peter_removemath_tl
ExplSyntaxOff

begin{document}

newcommandaaaa{AAA$^{1}$, BBB$^{2}$, CCC$^{3}$, DDD$^{4}$}

--removemath{AAA$^{1}$, BBB$^{2}$, CCC$^{3}$, DDD$^{4}$}--

--removemath{AAA$^{1}$, BBB$^{2}$, CCC$^{3}$, DDD}--

--removemath{AAA$^{1}$, BBB, CCC$^{3}$, DDD}--

--removemath{aaaa}--

end{document}





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    1 Answer
    1






    active

    oldest

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    1 Answer
    1






    active

    oldest

    votes









    active

    oldest

    votes






    active

    oldest

    votes









    3














    You can remove one formula at a time:



    documentclass{book}

    makeatletter
    newcommand{removemath}[1]{%
    expandafterremovemath@#1$$@nil
    }
    defremovemath@#1$#2$#3@nil{%
    #1%
    ifrelaxdetokenize{#3}relax
    expandafter@gobble
    else
    expandafter@firstofone
    fi
    {removemath@#3@nil}%
    }
    makeatother


    begin{document}

    newcommandaaaa{AAA$^{1}$, BBB$^{2}$, CCC$^{3}$, DDD$^{4}$}

    --removemath{AAA$^{1}$, BBB$^{2}$, CCC$^{3}$, DDD$^{4}$}--

    --removemath{AAA$^{1}$, BBB$^{2}$, CCC$^{3}$, DDD}--

    --removemath{AAA$^{1}$, BBB, CCC$^{3}$, DDD}--

    --removemath{aaaa}--

    end{document}


    enter image description here



    The same with a regular expression approach:



    documentclass{book}
    usepackage{xparse}

    ExplSyntaxOn
    NewDocumentCommand{removemath}{m}
    {
    peter_removemath:o { #1 }
    }

    cs_new_protected:Nn peter_removemath:n
    {
    tl_set:Nn l__peter_removemath_tl { #1 }
    regex_replace_all:nnN { $ [^$]* $ } {} l__peter_removemath_tl
    l__peter_removemath_tl
    }
    cs_generate_variant:Nn peter_removemath:n { o }
    tl_new:N l__peter_removemath_tl
    ExplSyntaxOff

    begin{document}

    newcommandaaaa{AAA$^{1}$, BBB$^{2}$, CCC$^{3}$, DDD$^{4}$}

    --removemath{AAA$^{1}$, BBB$^{2}$, CCC$^{3}$, DDD$^{4}$}--

    --removemath{AAA$^{1}$, BBB$^{2}$, CCC$^{3}$, DDD}--

    --removemath{AAA$^{1}$, BBB, CCC$^{3}$, DDD}--

    --removemath{aaaa}--

    end{document}





    share|improve this answer






























      3














      You can remove one formula at a time:



      documentclass{book}

      makeatletter
      newcommand{removemath}[1]{%
      expandafterremovemath@#1$$@nil
      }
      defremovemath@#1$#2$#3@nil{%
      #1%
      ifrelaxdetokenize{#3}relax
      expandafter@gobble
      else
      expandafter@firstofone
      fi
      {removemath@#3@nil}%
      }
      makeatother


      begin{document}

      newcommandaaaa{AAA$^{1}$, BBB$^{2}$, CCC$^{3}$, DDD$^{4}$}

      --removemath{AAA$^{1}$, BBB$^{2}$, CCC$^{3}$, DDD$^{4}$}--

      --removemath{AAA$^{1}$, BBB$^{2}$, CCC$^{3}$, DDD}--

      --removemath{AAA$^{1}$, BBB, CCC$^{3}$, DDD}--

      --removemath{aaaa}--

      end{document}


      enter image description here



      The same with a regular expression approach:



      documentclass{book}
      usepackage{xparse}

      ExplSyntaxOn
      NewDocumentCommand{removemath}{m}
      {
      peter_removemath:o { #1 }
      }

      cs_new_protected:Nn peter_removemath:n
      {
      tl_set:Nn l__peter_removemath_tl { #1 }
      regex_replace_all:nnN { $ [^$]* $ } {} l__peter_removemath_tl
      l__peter_removemath_tl
      }
      cs_generate_variant:Nn peter_removemath:n { o }
      tl_new:N l__peter_removemath_tl
      ExplSyntaxOff

      begin{document}

      newcommandaaaa{AAA$^{1}$, BBB$^{2}$, CCC$^{3}$, DDD$^{4}$}

      --removemath{AAA$^{1}$, BBB$^{2}$, CCC$^{3}$, DDD$^{4}$}--

      --removemath{AAA$^{1}$, BBB$^{2}$, CCC$^{3}$, DDD}--

      --removemath{AAA$^{1}$, BBB, CCC$^{3}$, DDD}--

      --removemath{aaaa}--

      end{document}





      share|improve this answer




























        3












        3








        3







        You can remove one formula at a time:



        documentclass{book}

        makeatletter
        newcommand{removemath}[1]{%
        expandafterremovemath@#1$$@nil
        }
        defremovemath@#1$#2$#3@nil{%
        #1%
        ifrelaxdetokenize{#3}relax
        expandafter@gobble
        else
        expandafter@firstofone
        fi
        {removemath@#3@nil}%
        }
        makeatother


        begin{document}

        newcommandaaaa{AAA$^{1}$, BBB$^{2}$, CCC$^{3}$, DDD$^{4}$}

        --removemath{AAA$^{1}$, BBB$^{2}$, CCC$^{3}$, DDD$^{4}$}--

        --removemath{AAA$^{1}$, BBB$^{2}$, CCC$^{3}$, DDD}--

        --removemath{AAA$^{1}$, BBB, CCC$^{3}$, DDD}--

        --removemath{aaaa}--

        end{document}


        enter image description here



        The same with a regular expression approach:



        documentclass{book}
        usepackage{xparse}

        ExplSyntaxOn
        NewDocumentCommand{removemath}{m}
        {
        peter_removemath:o { #1 }
        }

        cs_new_protected:Nn peter_removemath:n
        {
        tl_set:Nn l__peter_removemath_tl { #1 }
        regex_replace_all:nnN { $ [^$]* $ } {} l__peter_removemath_tl
        l__peter_removemath_tl
        }
        cs_generate_variant:Nn peter_removemath:n { o }
        tl_new:N l__peter_removemath_tl
        ExplSyntaxOff

        begin{document}

        newcommandaaaa{AAA$^{1}$, BBB$^{2}$, CCC$^{3}$, DDD$^{4}$}

        --removemath{AAA$^{1}$, BBB$^{2}$, CCC$^{3}$, DDD$^{4}$}--

        --removemath{AAA$^{1}$, BBB$^{2}$, CCC$^{3}$, DDD}--

        --removemath{AAA$^{1}$, BBB, CCC$^{3}$, DDD}--

        --removemath{aaaa}--

        end{document}





        share|improve this answer















        You can remove one formula at a time:



        documentclass{book}

        makeatletter
        newcommand{removemath}[1]{%
        expandafterremovemath@#1$$@nil
        }
        defremovemath@#1$#2$#3@nil{%
        #1%
        ifrelaxdetokenize{#3}relax
        expandafter@gobble
        else
        expandafter@firstofone
        fi
        {removemath@#3@nil}%
        }
        makeatother


        begin{document}

        newcommandaaaa{AAA$^{1}$, BBB$^{2}$, CCC$^{3}$, DDD$^{4}$}

        --removemath{AAA$^{1}$, BBB$^{2}$, CCC$^{3}$, DDD$^{4}$}--

        --removemath{AAA$^{1}$, BBB$^{2}$, CCC$^{3}$, DDD}--

        --removemath{AAA$^{1}$, BBB, CCC$^{3}$, DDD}--

        --removemath{aaaa}--

        end{document}


        enter image description here



        The same with a regular expression approach:



        documentclass{book}
        usepackage{xparse}

        ExplSyntaxOn
        NewDocumentCommand{removemath}{m}
        {
        peter_removemath:o { #1 }
        }

        cs_new_protected:Nn peter_removemath:n
        {
        tl_set:Nn l__peter_removemath_tl { #1 }
        regex_replace_all:nnN { $ [^$]* $ } {} l__peter_removemath_tl
        l__peter_removemath_tl
        }
        cs_generate_variant:Nn peter_removemath:n { o }
        tl_new:N l__peter_removemath_tl
        ExplSyntaxOff

        begin{document}

        newcommandaaaa{AAA$^{1}$, BBB$^{2}$, CCC$^{3}$, DDD$^{4}$}

        --removemath{AAA$^{1}$, BBB$^{2}$, CCC$^{3}$, DDD$^{4}$}--

        --removemath{AAA$^{1}$, BBB$^{2}$, CCC$^{3}$, DDD}--

        --removemath{AAA$^{1}$, BBB, CCC$^{3}$, DDD}--

        --removemath{aaaa}--

        end{document}






        share|improve this answer














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        share|improve this answer








        edited Jan 25 at 23:18

























        answered Jan 25 at 23:13









        egregegreg

        717k8619023191




        717k8619023191






























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