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2_programmation:macros:definir_une_macro_a_plus_de_9_arguments [2018/05/22 19:41] joseph.wright |
2_programmation:macros:definir_une_macro_a_plus_de_9_arguments [2018/12/02 22:41] jejust |
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| Ligne 1: | Ligne 1: | ||
| - | # How to break the 9-argument limit | + | ====== |
| If you think about it, you will realise that Knuth' | If you think about it, you will realise that Knuth' | ||
| definition syntax: | definition syntax: | ||
| - | ```latex | + | |
| + | < | ||
| \def\blah# | \def\blah# | ||
| - | ``` | + | </ |
| is intrinsically limited to just 9 arguments. | is intrinsically limited to just 9 arguments. | ||
| - | round this: how would you express a 10th argument?& | + | round this: how would you express a 10th argument? |
| the syntax didn't gobble some other valid usage? | the syntax didn't gobble some other valid usage? | ||
| If you really must have more than 9 arguments, the way to go is: | If you really must have more than 9 arguments, the way to go is: | ||
| - | <!-- {% raw %} --> | + | |
| - | ```latex | + | |
| + | < | ||
| \def\blah# | \def\blah# | ||
| \def\ArgI{{# | \def\ArgI{{# | ||
| Ligne 27: | Ligne 30: | ||
| <macro body>% | <macro body>% | ||
| } | } | ||
| - | ``` | + | </code> |
| - | <!-- {% endraw %} --> | + | |
| This technique is easily extendible by concert pianists of the TeX | This technique is easily extendible by concert pianists of the TeX | ||
| keyboard, but is really hard to recommend. | keyboard, but is really hard to recommend. | ||
| LaTeX users have the small convenience of merely giving a number of | LaTeX users have the small convenience of merely giving a number of | ||
| - | arguments in the `\newcommand` that defines each part of the | + | arguments in the '' |
| - | relaying mechanism: Knuth' | + | relaying mechanism: Knuth' |
| - | just as it does to `\def`. However, LaTeX users also have the | + | just as it does to '' |
| - | way out of such barbarous command syntax: the [`keyval`](http:// | + | way out of such barbarous command syntax: the [[ctanpkg> |
| - | package. | + | package. |
| write really quite sophisticated commands, whose invocation might look | write really quite sophisticated commands, whose invocation might look | ||
| like: | like: | ||
| - | <!-- {% raw %} --> | + | |
| - | ```latex | + | |
| + | < | ||
| \flowerinstance{species=Primula veris, | \flowerinstance{species=Primula veris, | ||
| family=Primulaceae, | family=Primulaceae, | ||
| Ligne 50: | Ligne 54: | ||
| soiltype=alkaline | soiltype=alkaline | ||
| } | } | ||
| - | ``` | + | </code> |
| - | <!-- {% endraw %} --> | + | |
| The merit of such verbosity is that it is self-explanatory: | The merit of such verbosity is that it is self-explanatory: | ||
| - | doesn' | + | doesn' |
| on: the commands may be copied from field notes quickly and | on: the commands may be copied from field notes quickly and | ||
| accurately. | accurately. | ||
| - | * faq-mac-prog.tex (q-keyval): tweak words about getoptk | ||
| - | ---- | + | --- |
| + | |||
| + | //Source:// [[faquk> | ||
| - | Content last updated: 2014-06-10 | + | {{htmlmetatags> |
| + | metatag-og:title=(How to break the 9-argument limit) | ||
| + | metatag-og: | ||
| + | }} | ||
