Latex3 replacement for afterassigment in parsing code to grab integer












0















When parsing expressions, one way that I like to grab an integer delimited on the end by any nonexpandable token that is not a digit is using a count register and afterassignment. So the code looks like:



newcountmycount

defmycommand#1{mycommand@#1nil}

defmycommand@{afterassignmentmycommand@@mycount=}

defmycommand@@#1nil{integer: "themycount", rest: "#1"}


so then mycommand{12 and text} produces integer: "12", rest: "and text". For an example of why I would want to do this, see my answer here: https://tex.stackexchange.com/a/470171/23866. The asker wanted a command that takes as argument a specification like column 10 to 12 row 3 to 5.



Is there a sanctioned latex3 approach to this?






latex3 parsing







share|improve this question























  • Why not just use delimited arguments? defgrab column#1to#2row#3to#4endgrab{...}

    – Henri Menke
    1 hour ago
















0















When parsing expressions, one way that I like to grab an integer delimited on the end by any nonexpandable token that is not a digit is using a count register and afterassignment. So the code looks like:



newcountmycount

defmycommand#1{mycommand@#1nil}

defmycommand@{afterassignmentmycommand@@mycount=}

defmycommand@@#1nil{integer: "themycount", rest: "#1"}


so then mycommand{12 and text} produces integer: "12", rest: "and text". For an example of why I would want to do this, see my answer here: https://tex.stackexchange.com/a/470171/23866. The asker wanted a command that takes as argument a specification like column 10 to 12 row 3 to 5.



Is there a sanctioned latex3 approach to this?






latex3 parsing







share|improve this question























  • Why not just use delimited arguments? defgrab column#1to#2row#3to#4endgrab{...}

    – Henri Menke
    1 hour ago














0












0








0








When parsing expressions, one way that I like to grab an integer delimited on the end by any nonexpandable token that is not a digit is using a count register and afterassignment. So the code looks like:



newcountmycount

defmycommand#1{mycommand@#1nil}

defmycommand@{afterassignmentmycommand@@mycount=}

defmycommand@@#1nil{integer: "themycount", rest: "#1"}


so then mycommand{12 and text} produces integer: "12", rest: "and text". For an example of why I would want to do this, see my answer here: https://tex.stackexchange.com/a/470171/23866. The asker wanted a command that takes as argument a specification like column 10 to 12 row 3 to 5.



Is there a sanctioned latex3 approach to this?






latex3 parsing







share|improve this question














When parsing expressions, one way that I like to grab an integer delimited on the end by any nonexpandable token that is not a digit is using a count register and afterassignment. So the code looks like:



newcountmycount

defmycommand#1{mycommand@#1nil}

defmycommand@{afterassignmentmycommand@@mycount=}

defmycommand@@#1nil{integer: "themycount", rest: "#1"}


so then mycommand{12 and text} produces integer: "12", rest: "and text". For an example of why I would want to do this, see my answer here: https://tex.stackexchange.com/a/470171/23866. The asker wanted a command that takes as argument a specification like column 10 to 12 row 3 to 5.



Is there a sanctioned latex3 approach to this?






latex3 parsing




latex3 parsing






share|improve this question













share|improve this question











share|improve this question




share|improve this question










asked 2 hours ago









Hood ChathamHood Chatham

4,2491428




4,2491428













  • Why not just use delimited arguments? defgrab column#1to#2row#3to#4endgrab{...}

    – Henri Menke
    1 hour ago



















  • Why not just use delimited arguments? defgrab column#1to#2row#3to#4endgrab{...}

    – Henri Menke
    1 hour ago

















Why not just use delimited arguments? defgrab column#1to#2row#3to#4endgrab{...}

– Henri Menke
1 hour ago





Why not just use delimited arguments? defgrab column#1to#2row#3to#4endgrab{...}

– Henri Menke
1 hour ago










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