Mdthbs

Greetings from Switzerland,

(I apologise for this poorly worded question)

Is it possible to create a command "root" (e.g. law, with a fixed structure as detailed below, never used in the document itself) and subsequently create other "subcommands" (e.g. lawbueg, lawbuev, lawkbueg) depending on my needs?

Here is a MWE:

documentclass{article}

usepackage{xstring}

usepackage{xifthen}

usepackage{xparse}



DeclareDocumentCommandlaw{ m m g g}{% 

    {Art.~#2%

        IfNoValueF {#3} {%

            IfInteger{#3}%

            {~Abs. #3}%

            {~lit. #3}%

        }%

        IfNoValueF {#4} {%

            IfInteger{#4}%

            {~Ziff. #4}%

            {~lit. #4}%

        }%

        ~#1}%

    }



% law-command "generator"

newcommand[2]{createlaw}{<unsure how to proceed here>}

   % #1 needs to be stuck right after law and before the first {, in order to create a new separate command every time I use createlaw

   % #2 this argument needs to correspond to #1 in law above



%Examples:

%createlaw{bueg}{BüG}

%createlaw{kbueg}{KBüG}





begin{document}



Hello, I'm lawbueg{21}{2}{b}, and I'm lawkbueg{43}{1}.



end{document}

I'd be grateful for any help.

Here is a way that works for this MWE but I don't really know if it works for you (for your real needs):

documentclass{article}

usepackage{xstring}

usepackage{xifthen}

usepackage{xparse}



DeclareDocumentCommandlaw{ m m g g}{% 

    {Art.~#2%

        IfNoValueF {#3} {%

            IfInteger{#3}%

            {~Abs. #3}%

            {~lit. #3}%

        }%

        IfNoValueF {#4} {%

            IfInteger{#4}%

            {~Ziff. #4}%

            {~lit. #4}%

        }%

        ~#1}%

    }



% law-command "generator"

newcommand{createlaw}[2]{%

edeftemp{law{#2}}

expandafterexpandafterexpandafterglobalexpandafterletcsname law#1endcsnametemp

}

   % #1 needs to be stuck right after law and before the first {, in order to create a new separate command every time I use createlaw

   % #2 this argument needs to correspond to #1 in law above



%Examples:

createlaw{bueg}{BüG}

createlaw{kbueg}{KBüG}





begin{document}



Hello, I'm lawbueg{21}{2}{b}, and I'm lawkbueg{43}{1}.



end{document}

Output:

Hello, I’m Art. 21 Abs. 2 lit. b BG, and I’m Art. 43 Abs. 1 KBG.

I would avoid the g argument type. Anyway, here's a solution that also implements IfIntegerTF in place of IfInteger of xstring.

documentclass{article}

usepackage{xparse}



NewDocumentCommandlaw{ m m g g}{%

  Art.~#2%

  IfNoValueF{#3}{%

    IfIntegerTF{#3}%

      {~Abs. #3}%

      {~lit. #3}%

  }%

  IfNoValueF{#4}{%

    IfIntegerTF{#4}%

      {~Ziff. #4}%

      {~lit. #4}%

    }%

  ~#1%

}



ExplSyntaxOn

% law-command "generator"

NewDocumentCommand{createlaw}{mm}

 {

   % creates law#1

   % #2 is the first argument to law

   cs_new_protected:cpn { law#1 } { law{#2} }

 }

NewDocumentCommand{IfIntegerTF}{mmm}

 {% [+-]? is zero or one sign; d+ is one or more digits

  regex_match:nnTF { A [+-]? d+ Z } { #1 } { #2 } { #3 }

 }

ExplSyntaxOff



createlaw{bueg}{BüG}

createlaw{kbueg}{KBüG}



begin{document}



Hello, I'm lawbueg{21}{2}{b}, and I'm lawkbueg{43}{1}.



end{document}