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Henning Hraban Ramm

17 Oct 2005 17 Oct '05

4:06 p.m.

Salute wizards! I tried to write a macro for a TABLE line: \def\TestCmd{\dodoubleempty\doTestCmd} \def\doTestCmd[#1][#2]#3{\bTR\bTD #3 \iffirstargument\hfill (#1)\fi \eTD \bTD \ifsecondargument 3: #2 and #3 \else 2: only #3 \fi \eTD\eTR } But it never goes into "else" (if #2 is empty, I get "3: and #3")! And it's only with the table commands around. Why? What can I do? Grüßlis vom Hraban! --- http://www.fiee.net/texnique/ http://contextgarden.net http://www.cacert.org (I'm an assurer)

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Peter Rolf

18 Oct 18 Oct

2:23 a.m.

Hi Hraban, Henning Hraban Ramm wrote:

Salute wizards!

I tried to write a macro for a TABLE line:

\def\TestCmd{\dodoubleempty\doTestCmd} \def\doTestCmd[#1][#2]#3{\bTR\bTD #3 \iffirstargument\hfill (#1)\fi \eTD \bTD \ifsecondargument 3: #2 and #3 \else 2: only #3 \fi \eTD\eTR }

But it never goes into "else" (if #2 is empty, I get "3: and #3")! And it's only with the table commands around. Why? What can I do?

the numbering is not bound to the parameter number; it's just a counter. calling the macro with two arguments -> \iffirstargument is true \ifsecondargument is true \ifthirdargument is false so simpy start your code with up-down testing of the argument number \ifthirdargument % [#1][#2]#3 ... \else \ifsecondargument % [#1 or #2; you must decide which one]#3 ... \else % #3 ... \fi \fi Greetings, Peter

Grüßlis vom Hraban! --- http://www.fiee.net/texnique/ http://contextgarden.net http://www.cacert.org (I'm an assurer)

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Henning Hraban Ramm

3:08 a.m.

Am 2005-10-18 um 10:23 schrieb Peter Rolf:

...
I tried to write a macro for a TABLE line:

\def\TestCmd{\dodoubleempty\doTestCmd} \def\doTestCmd[#1][#2]#3{\bTR\bTD #3 \iffirstargument\hfill (#1)\fi \eTD \bTD \ifsecondargument 3: #2 and #3 \else 2: only #3 \fi \eTD\eTR }

But it never goes into "else" (if #2 is empty, I get "3: and #3")! And it's only with the table commands around. Why? What can I do?

the numbering is not bound to the parameter number; it's just a counter. calling the macro with two arguments -> \iffirstargument is true \ifsecondargument is true \ifthirdargument is false

But why *does it work* without the TABLE commands?? If it would be true (or at least the reason for my problem) what you wrote, the following should work: \def\TestCmd{\dodoubleempty\doTestCmd} \def\doTestCmd[#1][#2]#3{\bTR\bTD #3 \ifsecondargument \iffirstargument\hfill (#1)\fi \eTD \bTD 3(#1.#2.#3) \else \iffirstargument\hfill (#1)\fi \eTD \bTD 2(#1/#2/#3) \fi \eTD\eTR } But there I get only a ! Incomplete \iftrue; all text was ignored after line 63. <inserted text> \fi Grüßlis vom Hraban! --- http://www.fiee.net/texnique/ http://contextgarden.net http://www.cacert.org (I'm an assurer)

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Peter Rolf

4:18 a.m.

Henning Hraban Ramm wrote:

Am 2005-10-18 um 10:23 schrieb Peter Rolf:

...
...
I tried to write a macro for a TABLE line:

\def\TestCmd{\dodoubleempty\doTestCmd} \def\doTestCmd[#1][#2]#3{\bTR\bTD #3 \iffirstargument\hfill (#1)\fi \eTD \bTD \ifsecondargument 3: #2 and #3 \else 2: only #3 \fi \eTD\eTR }

But it never goes into "else" (if #2 is empty, I get "3: and #3")! And it's only with the table commands around. Why? What can I do?

the numbering is not bound to the parameter number; it's just a counter. calling the macro with two arguments -> \iffirstargument is true \ifsecondargument is true \ifthirdargument is false

sorry, my fault. you are right :) the numbers are bound to the parameter. and \ifthirdargument is always true (not an optional parameter). ----- \def\TestCmd{\dodoubleempty\doTestCmd} \def\doTestCmd[#1][#2]#3{% \ifsecondargument \iffirstargument 3(#1/#2/#3) \else 2a(#1.#2.#3) \fi \else \iffirstargument 2b(#1/#2/#3) \else 1(#1/#2/#3) \fi \fi } \starttext \TestCmd{C} \TestCmd[A]{C} \TestCmd[][B]{C} \TestCmd[A][B]{C} \stoptext ----- this gives 1(//C) 2b(A//C) 3(/B/C) 3(A/B/C) thanks for the lesson ;) Peter

But why *does it work* without the TABLE commands??

??? maybe an expansion problem. have you tried \expanded{\TestCmd...}

If it would be true (or at least the reason for my problem) what you wrote, the following should work:

\def\TestCmd{\dodoubleempty\doTestCmd} \def\doTestCmd[#1][#2]#3{\bTR\bTD #3 \ifsecondargument \iffirstargument\hfill (#1)\fi \eTD \bTD 3(#1.#2.#3) \else \iffirstargument\hfill (#1)\fi \eTD \bTD 2(#1/#2/#3) \fi \eTD\eTR }

But there I get only a ! Incomplete \iftrue; all text was ignored after line 63. <inserted text> \fi

Grüßlis vom Hraban! --- http://www.fiee.net/texnique/ http://contextgarden.net http://www.cacert.org (I'm an assurer)

_______________________________________________ ntg-context mailing list ntg-context@ntg.nl http://www.ntg.nl/mailman/listinfo/ntg-context

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Peter Rolf

5:26 a.m.

Henning Hraban Ramm wrote:

Am 2005-10-18 um 10:23 schrieb Peter Rolf:

...
...
I tried to write a macro for a TABLE line:

\def\TestCmd{\dodoubleempty\doTestCmd} \def\doTestCmd[#1][#2]#3{\bTR\bTD #3 \iffirstargument\hfill (#1)\fi \eTD \bTD \ifsecondargument 3: #2 and #3 \else 2: only #3 \fi \eTD\eTR }

But it never goes into "else" (if #2 is empty, I get "3: and #3")! And it's only with the table commands around. Why? What can I do?

the numbering is not bound to the parameter number; it's just a counter. calling the macro with two arguments -> \iffirstargument is true \ifsecondargument is true \ifthirdargument is false

But why *does it work* without the TABLE commands?? If it would be true (or at least the reason for my problem) what you wrote, the following should work:

\def\TestCmd{\dodoubleempty\doTestCmd} \def\doTestCmd[#1][#2]#3{\bTR\bTD #3 \ifsecondargument \iffirstargument\hfill (#1)\fi \eTD \bTD 3(#1.#2.#3) \else \iffirstargument\hfill (#1)\fi \eTD \bTD 2(#1/#2/#3) \fi \eTD\eTR }

But there I get only a ! Incomplete \iftrue; all text was ignored after line 63. <inserted text> \fi

The problem is, that the analysis of the \if?argument is not working here. You always get three arguments inside the TABLE. The following example shows this in the first three rows. If you use \doifelsenothing{TEST} {NOTHING part} {SOMETHING part}% it works (last three rows). Dunno why ;) Greetings, Peter ----- % interface=en output=pdftex % Time-stamp: % \def\TestCmd{\dodoubleempty\doTestCmd} \def\doTestCmd[#1][#2]#3{\bTR\bTD #3% \ifsecondargument \hfill (#1) 3: #2 and #3 \else \iffirstargument \hfill (#1) 2: #3 \else 1: #3 \fi \fi \eTD\eTR } \def\TestCmdA{\dodoubleempty\doTestCmdA} \def\doTestCmdA[#1][#2]#3{\bTR\bTD #3% \doifelsenothing{#2} {\doifelsenothing{#1} {1: #3} {\hfill (#1) 2: #3}% } {\doifelsenothing{#1} {2: #2 and #3} {\hfill (#1) 3: #2 and #3}% }% \eTD\eTR } \starttext \bTABLE \TestCmd{C} \TestCmd[A]{C} \TestCmd[A][B]{C} \TestCmdA{Z} \TestCmdA[Y]{Z} \TestCmdA[X][Y]{Z} \eTABLE \stoptext %%% Local Variables: %%% mode: context %%% TeX-master: "" %%% End: -----

Grüßlis vom Hraban! --- http://www.fiee.net/texnique/ http://contextgarden.net http://www.cacert.org (I'm an assurer)

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Vit Zyka

5:39 a.m.

Peter Rolf wrote:

Henning Hraban Ramm wrote:

...
Am 2005-10-18 um 10:23 schrieb Peter Rolf:

...
...
I tried to write a macro for a TABLE line:

\def\TestCmd{\dodoubleempty\doTestCmd} \def\doTestCmd[#1][#2]#3{\bTR\bTD #3 \iffirstargument\hfill (#1)\fi \eTD \bTD \ifsecondargument 3: #2 and #3 \else 2: only #3 \fi \eTD\eTR }

But it never goes into "else" (if #2 is empty, I get "3: and #3")! And it's only with the table commands around. Why? What can I do?

the numbering is not bound to the parameter number; it's just a counter. calling the macro with two arguments -> \iffirstargument is true \ifsecondargument is true \ifthirdargument is false

But why *does it work* without the TABLE commands?? If it would be true (or at least the reason for my problem) what you wrote, the following should work:

\def\TestCmd{\dodoubleempty\doTestCmd} \def\doTestCmd[#1][#2]#3{\bTR\bTD #3 \ifsecondargument \iffirstargument\hfill (#1)\fi \eTD \bTD 3(#1.#2.#3) \else \iffirstargument\hfill (#1)\fi \eTD \bTD 2(#1/#2/#3) \fi \eTD\eTR }

But there I get only a ! Incomplete \iftrue; all text was ignored after line 63. <inserted text> \fi

The problem is, that the analysis of the \if?argument is not working here. You always get three arguments inside the TABLE.

I did not test but my opinion is: - \if*argument is set in the \do*empty - \bTR, \eTR has optional params so they also use \do*empty - using test \if*argument AFTER \bTR, \bTD, ... is related to the \bTR, ... number of arguments not to the \TestCmd. vit

The following example shows this in the first three rows. If you use

\doifelsenothing{TEST} {NOTHING part} {SOMETHING part}%

it works (last three rows). Dunno why ;)

Greetings,

Peter

----- % interface=en output=pdftex % Time-stamp: %

\def\TestCmd{\dodoubleempty\doTestCmd} \def\doTestCmd[#1][#2]#3{\bTR\bTD #3% \ifsecondargument \hfill (#1) 3: #2 and #3 \else \iffirstargument \hfill (#1) 2: #3 \else 1: #3 \fi \fi \eTD\eTR }

\def\TestCmdA{\dodoubleempty\doTestCmdA} \def\doTestCmdA[#1][#2]#3{\bTR\bTD #3% \doifelsenothing{#2} {\doifelsenothing{#1} {1: #3} {\hfill (#1) 2: #3}% } {\doifelsenothing{#1} {2: #2 and #3} {\hfill (#1) 3: #2 and #3}% }% \eTD\eTR }

\starttext

\bTABLE

\TestCmd{C} \TestCmd[A]{C} \TestCmd[A][B]{C}

\TestCmdA{Z} \TestCmdA[Y]{Z} \TestCmdA[X][Y]{Z}

\eTABLE

\stoptext

%%% Local Variables: %%% mode: context %%% TeX-master: "" %%% End: -----

...
Grüßlis vom Hraban! --- http://www.fiee.net/texnique/ http://contextgarden.net http://www.cacert.org (I'm an assurer)

_______________________________________________ ntg-context mailing list ntg-context@ntg.nl http://www.ntg.nl/mailman/listinfo/ntg-context

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Hans Hagen

8:49 a.m.

Vit Zyka wrote:

I did not test but my opinion is:

- \if*argument is set in the \do*empty

- \bTR, \eTR has optional params so they also use \do*empty

- using test \if*argument AFTER \bTR, \bTD, ... is related to the \bTR, ... number of arguments not to the \TestCmd.

your opinion is right also, make sure that the if else fi don't span arguments (unless you know what you're doing), so: \bTD \iftrue \eTD \bTD \fi \eTD kind of things are tricky for instance when \bTD .. \eTD is defined as \def\bTD#1\eTD{...} conditionals are parsed in special ways in tex the program (speed optimiziation) Hans ----------------------------------------------------------------- Hans Hagen | PRAGMA ADE Ridderstraat 27 | 8061 GH Hasselt | The Netherlands tel: 038 477 53 69 | fax: 038 477 53 74 | www.pragma-ade.com | www.pragma-pod.nl -----------------------------------------------------------------

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Henning Hraban Ramm

2:07 p.m.

Am 2005-10-18 um 13:26 schrieb Peter Rolf:

\doifelsenothing{TEST} {NOTHING part} {SOMETHING part}%

Thank you, I could solve it with that. I already suspected that optional-argument-of-eTX issue, there were some error messages in other variants that I tried, that pointed in this direction, but I didn't knew how to solve it (thought about some \expand magic). I guess I should finally buy the TeXbook and learn TeX (sigh, another old fashioned programming language...) Grüßlis vom Hraban! --- http://www.fiee.net/texnique/ http://contextgarden.net http://www.cacert.org (I'm an assurer)

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Hans Hagen
Henning Hraban Ramm
Peter Rolf
Vit Zyka