plain IF structure with one def-ed token and one literal Announcing the arrival of Valued Associate #679: Cesar Manara Planned maintenance scheduled April 23, 2019 at 23:30 UTC (7:30pm US/Eastern)ifthenelse with inequalities and expressions, using pgfmathparseChecking a command with equal and then using that command for another command?Getting started with latex and conditional typesetHow test value of a command with `ifthenelse` and `equal`?Conditionals used in a new environment of detection of how many lines of quotation and with the selection of a language in XeLaTeXhelp with nomenclature groups and ifthenelse

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plain IF structure with one def-ed token and one literal



Announcing the arrival of Valued Associate #679: Cesar Manara
Planned maintenance scheduled April 23, 2019 at 23:30 UTC (7:30pm US/Eastern)ifthenelse with inequalities and expressions, using pgfmathparseChecking a command with equal and then using that command for another command?Getting started with latex and conditional typesetHow test value of a command with `ifthenelse` and `equal`?Conditionals used in a new environment of detection of how many lines of quotation and with the selection of a language in XeLaTeXhelp with nomenclature groups and ifthenelse










4















In some hand-me-down tex i inherited, a control sequence is used as a variable, for instance:



defaccessflavorats


it is used to generate postfixes on included tex files (called, i.e., image01_ats) and the like.



I want to use it in a conditional structure, i. e. something like



ifaccessflavor ats
This text is only shown if the Flavor of Access is 'ats'.
fi


I tried a a lot of variations, including various brackets, escape sequences and macros, but i cannot get it to work. Mostly, not even an error message appears. The online examples i found either deal with a more specific IF, like ifodd, ifx, etc., or more (seemingly) complex cases like testing two macros for identity.



Can somebody clear up the usage for me?










share|improve this question
























  • I can recommend the multiaudience package which allows you to separate some parts of your text for different "audiences" and provides higher-level switches. As part of this, you can use its CurrentAudience variable to get the audience you are currently writing for (e.g. for file names).

    – TeXnician
    Apr 15 at 14:57















4















In some hand-me-down tex i inherited, a control sequence is used as a variable, for instance:



defaccessflavorats


it is used to generate postfixes on included tex files (called, i.e., image01_ats) and the like.



I want to use it in a conditional structure, i. e. something like



ifaccessflavor ats
This text is only shown if the Flavor of Access is 'ats'.
fi


I tried a a lot of variations, including various brackets, escape sequences and macros, but i cannot get it to work. Mostly, not even an error message appears. The online examples i found either deal with a more specific IF, like ifodd, ifx, etc., or more (seemingly) complex cases like testing two macros for identity.



Can somebody clear up the usage for me?










share|improve this question
























  • I can recommend the multiaudience package which allows you to separate some parts of your text for different "audiences" and provides higher-level switches. As part of this, you can use its CurrentAudience variable to get the audience you are currently writing for (e.g. for file names).

    – TeXnician
    Apr 15 at 14:57













4












4








4








In some hand-me-down tex i inherited, a control sequence is used as a variable, for instance:



defaccessflavorats


it is used to generate postfixes on included tex files (called, i.e., image01_ats) and the like.



I want to use it in a conditional structure, i. e. something like



ifaccessflavor ats
This text is only shown if the Flavor of Access is 'ats'.
fi


I tried a a lot of variations, including various brackets, escape sequences and macros, but i cannot get it to work. Mostly, not even an error message appears. The online examples i found either deal with a more specific IF, like ifodd, ifx, etc., or more (seemingly) complex cases like testing two macros for identity.



Can somebody clear up the usage for me?










share|improve this question
















In some hand-me-down tex i inherited, a control sequence is used as a variable, for instance:



defaccessflavorats


it is used to generate postfixes on included tex files (called, i.e., image01_ats) and the like.



I want to use it in a conditional structure, i. e. something like



ifaccessflavor ats
This text is only shown if the Flavor of Access is 'ats'.
fi


I tried a a lot of variations, including various brackets, escape sequences and macros, but i cannot get it to work. Mostly, not even an error message appears. The online examples i found either deal with a more specific IF, like ifodd, ifx, etc., or more (seemingly) complex cases like testing two macros for identity.



Can somebody clear up the usage for me?







ifthenelse






share|improve this question















share|improve this question













share|improve this question




share|improve this question








edited Apr 15 at 15:18









Kurt

41.5k950164




41.5k950164










asked Apr 15 at 14:54









bukwyrmbukwyrm

1212




1212












  • I can recommend the multiaudience package which allows you to separate some parts of your text for different "audiences" and provides higher-level switches. As part of this, you can use its CurrentAudience variable to get the audience you are currently writing for (e.g. for file names).

    – TeXnician
    Apr 15 at 14:57

















  • I can recommend the multiaudience package which allows you to separate some parts of your text for different "audiences" and provides higher-level switches. As part of this, you can use its CurrentAudience variable to get the audience you are currently writing for (e.g. for file names).

    – TeXnician
    Apr 15 at 14:57
















I can recommend the multiaudience package which allows you to separate some parts of your text for different "audiences" and provides higher-level switches. As part of this, you can use its CurrentAudience variable to get the audience you are currently writing for (e.g. for file names).

– TeXnician
Apr 15 at 14:57





I can recommend the multiaudience package which allows you to separate some parts of your text for different "audiences" and provides higher-level switches. As part of this, you can use its CurrentAudience variable to get the audience you are currently writing for (e.g. for file names).

– TeXnician
Apr 15 at 14:57










2 Answers
2






active

oldest

votes


















3














documentclassarticle
defatscomparetokenats
newcommanddomytest%
ifxatscomparetokenaccessflavor MATCHES atselse DOES NOT MATCH atsfi

begindocument
defaccessflavorats
domytest

defaccessflavorpdq
domytest
enddocument


enter image description here






share|improve this answer























  • Thank you! Can you explain what is going on? If i understand it correctly, you def-ed atscomparetoken so that the ifx could work on two tokens - is there a reason you packed the whole thing into a command? Also, do you know why one needs the string as an expansion inside a token (for the ifx case it is clear, but why dies if not work?)

    – bukwyrm
    Apr 15 at 15:22












  • @bukwyrm Correct, the ifx works on two tokens, and the comparison is whether the substitution text (one level of expansion) for the two tokens matches or not. The problem with trying to do this with if is that if fully expands and then compares the first two tokens; thus, ifaccessflavor ats expands to if atsats and a is compared to t, with the remaining sats extraneous.

    – Steven B. Segletes
    Apr 15 at 15:50


















2














If you want to maintain the if...else...fi structure, you can use



documentclassarticle
usepackagepdftexcmds

makeatletter
newcommandflavor[1]%
TTfi
ifnumpdf@strcmp#1accessflavor=z@

makeatother

begindocument

defaccessflavorats

Shown

ifflavorats
This text is only shown if the Flavor of Access is `ats'.
fi

defaccessflavornotats

Not shown

ifflavorats
This text is only shown if the Flavor of Access is `ats'.
fi

enddocument


The usage of pdftexcmds is to obtain engine independence, so the code works with pdftex, luatex and xetex.



The trick is that if expands tokens.



Note that this can be used inside other conditionals.



enter image description here






share|improve this answer























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    2 Answers
    2






    active

    oldest

    votes








    2 Answers
    2






    active

    oldest

    votes









    active

    oldest

    votes






    active

    oldest

    votes









    3














    documentclassarticle
    defatscomparetokenats
    newcommanddomytest%
    ifxatscomparetokenaccessflavor MATCHES atselse DOES NOT MATCH atsfi

    begindocument
    defaccessflavorats
    domytest

    defaccessflavorpdq
    domytest
    enddocument


    enter image description here






    share|improve this answer























    • Thank you! Can you explain what is going on? If i understand it correctly, you def-ed atscomparetoken so that the ifx could work on two tokens - is there a reason you packed the whole thing into a command? Also, do you know why one needs the string as an expansion inside a token (for the ifx case it is clear, but why dies if not work?)

      – bukwyrm
      Apr 15 at 15:22












    • @bukwyrm Correct, the ifx works on two tokens, and the comparison is whether the substitution text (one level of expansion) for the two tokens matches or not. The problem with trying to do this with if is that if fully expands and then compares the first two tokens; thus, ifaccessflavor ats expands to if atsats and a is compared to t, with the remaining sats extraneous.

      – Steven B. Segletes
      Apr 15 at 15:50















    3














    documentclassarticle
    defatscomparetokenats
    newcommanddomytest%
    ifxatscomparetokenaccessflavor MATCHES atselse DOES NOT MATCH atsfi

    begindocument
    defaccessflavorats
    domytest

    defaccessflavorpdq
    domytest
    enddocument


    enter image description here






    share|improve this answer























    • Thank you! Can you explain what is going on? If i understand it correctly, you def-ed atscomparetoken so that the ifx could work on two tokens - is there a reason you packed the whole thing into a command? Also, do you know why one needs the string as an expansion inside a token (for the ifx case it is clear, but why dies if not work?)

      – bukwyrm
      Apr 15 at 15:22












    • @bukwyrm Correct, the ifx works on two tokens, and the comparison is whether the substitution text (one level of expansion) for the two tokens matches or not. The problem with trying to do this with if is that if fully expands and then compares the first two tokens; thus, ifaccessflavor ats expands to if atsats and a is compared to t, with the remaining sats extraneous.

      – Steven B. Segletes
      Apr 15 at 15:50













    3












    3








    3







    documentclassarticle
    defatscomparetokenats
    newcommanddomytest%
    ifxatscomparetokenaccessflavor MATCHES atselse DOES NOT MATCH atsfi

    begindocument
    defaccessflavorats
    domytest

    defaccessflavorpdq
    domytest
    enddocument


    enter image description here






    share|improve this answer













    documentclassarticle
    defatscomparetokenats
    newcommanddomytest%
    ifxatscomparetokenaccessflavor MATCHES atselse DOES NOT MATCH atsfi

    begindocument
    defaccessflavorats
    domytest

    defaccessflavorpdq
    domytest
    enddocument


    enter image description here







    share|improve this answer












    share|improve this answer



    share|improve this answer










    answered Apr 15 at 15:01









    Steven B. SegletesSteven B. Segletes

    163k9207419




    163k9207419












    • Thank you! Can you explain what is going on? If i understand it correctly, you def-ed atscomparetoken so that the ifx could work on two tokens - is there a reason you packed the whole thing into a command? Also, do you know why one needs the string as an expansion inside a token (for the ifx case it is clear, but why dies if not work?)

      – bukwyrm
      Apr 15 at 15:22












    • @bukwyrm Correct, the ifx works on two tokens, and the comparison is whether the substitution text (one level of expansion) for the two tokens matches or not. The problem with trying to do this with if is that if fully expands and then compares the first two tokens; thus, ifaccessflavor ats expands to if atsats and a is compared to t, with the remaining sats extraneous.

      – Steven B. Segletes
      Apr 15 at 15:50

















    • Thank you! Can you explain what is going on? If i understand it correctly, you def-ed atscomparetoken so that the ifx could work on two tokens - is there a reason you packed the whole thing into a command? Also, do you know why one needs the string as an expansion inside a token (for the ifx case it is clear, but why dies if not work?)

      – bukwyrm
      Apr 15 at 15:22












    • @bukwyrm Correct, the ifx works on two tokens, and the comparison is whether the substitution text (one level of expansion) for the two tokens matches or not. The problem with trying to do this with if is that if fully expands and then compares the first two tokens; thus, ifaccessflavor ats expands to if atsats and a is compared to t, with the remaining sats extraneous.

      – Steven B. Segletes
      Apr 15 at 15:50
















    Thank you! Can you explain what is going on? If i understand it correctly, you def-ed atscomparetoken so that the ifx could work on two tokens - is there a reason you packed the whole thing into a command? Also, do you know why one needs the string as an expansion inside a token (for the ifx case it is clear, but why dies if not work?)

    – bukwyrm
    Apr 15 at 15:22






    Thank you! Can you explain what is going on? If i understand it correctly, you def-ed atscomparetoken so that the ifx could work on two tokens - is there a reason you packed the whole thing into a command? Also, do you know why one needs the string as an expansion inside a token (for the ifx case it is clear, but why dies if not work?)

    – bukwyrm
    Apr 15 at 15:22














    @bukwyrm Correct, the ifx works on two tokens, and the comparison is whether the substitution text (one level of expansion) for the two tokens matches or not. The problem with trying to do this with if is that if fully expands and then compares the first two tokens; thus, ifaccessflavor ats expands to if atsats and a is compared to t, with the remaining sats extraneous.

    – Steven B. Segletes
    Apr 15 at 15:50





    @bukwyrm Correct, the ifx works on two tokens, and the comparison is whether the substitution text (one level of expansion) for the two tokens matches or not. The problem with trying to do this with if is that if fully expands and then compares the first two tokens; thus, ifaccessflavor ats expands to if atsats and a is compared to t, with the remaining sats extraneous.

    – Steven B. Segletes
    Apr 15 at 15:50











    2














    If you want to maintain the if...else...fi structure, you can use



    documentclassarticle
    usepackagepdftexcmds

    makeatletter
    newcommandflavor[1]%
    TTfi
    ifnumpdf@strcmp#1accessflavor=z@

    makeatother

    begindocument

    defaccessflavorats

    Shown

    ifflavorats
    This text is only shown if the Flavor of Access is `ats'.
    fi

    defaccessflavornotats

    Not shown

    ifflavorats
    This text is only shown if the Flavor of Access is `ats'.
    fi

    enddocument


    The usage of pdftexcmds is to obtain engine independence, so the code works with pdftex, luatex and xetex.



    The trick is that if expands tokens.



    Note that this can be used inside other conditionals.



    enter image description here






    share|improve this answer



























      2














      If you want to maintain the if...else...fi structure, you can use



      documentclassarticle
      usepackagepdftexcmds

      makeatletter
      newcommandflavor[1]%
      TTfi
      ifnumpdf@strcmp#1accessflavor=z@

      makeatother

      begindocument

      defaccessflavorats

      Shown

      ifflavorats
      This text is only shown if the Flavor of Access is `ats'.
      fi

      defaccessflavornotats

      Not shown

      ifflavorats
      This text is only shown if the Flavor of Access is `ats'.
      fi

      enddocument


      The usage of pdftexcmds is to obtain engine independence, so the code works with pdftex, luatex and xetex.



      The trick is that if expands tokens.



      Note that this can be used inside other conditionals.



      enter image description here






      share|improve this answer

























        2












        2








        2







        If you want to maintain the if...else...fi structure, you can use



        documentclassarticle
        usepackagepdftexcmds

        makeatletter
        newcommandflavor[1]%
        TTfi
        ifnumpdf@strcmp#1accessflavor=z@

        makeatother

        begindocument

        defaccessflavorats

        Shown

        ifflavorats
        This text is only shown if the Flavor of Access is `ats'.
        fi

        defaccessflavornotats

        Not shown

        ifflavorats
        This text is only shown if the Flavor of Access is `ats'.
        fi

        enddocument


        The usage of pdftexcmds is to obtain engine independence, so the code works with pdftex, luatex and xetex.



        The trick is that if expands tokens.



        Note that this can be used inside other conditionals.



        enter image description here






        share|improve this answer













        If you want to maintain the if...else...fi structure, you can use



        documentclassarticle
        usepackagepdftexcmds

        makeatletter
        newcommandflavor[1]%
        TTfi
        ifnumpdf@strcmp#1accessflavor=z@

        makeatother

        begindocument

        defaccessflavorats

        Shown

        ifflavorats
        This text is only shown if the Flavor of Access is `ats'.
        fi

        defaccessflavornotats

        Not shown

        ifflavorats
        This text is only shown if the Flavor of Access is `ats'.
        fi

        enddocument


        The usage of pdftexcmds is to obtain engine independence, so the code works with pdftex, luatex and xetex.



        The trick is that if expands tokens.



        Note that this can be used inside other conditionals.



        enter image description here







        share|improve this answer












        share|improve this answer



        share|improve this answer










        answered Apr 15 at 15:29









        egregegreg

        735k8919343259




        735k8919343259



























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