Difference between revisions of "Command/define"
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m (Add note that this is mkiv code) |
(Update: \define does, in fact, happily redefine stuff) |
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== Description == | == Description == | ||
− | <code>\define</code> is like the TeX primitive <code>\def</code>: it defines a new TeX macro. Unlike <code>\def</code>, | + | <code>\define</code> is like the TeX primitive <code>\def</code>: it defines a new TeX macro. Unlike <code>\def</code>, <code>\define</code> will print an error to the log file if the new definition overwrites an existing command. |
The optional bracketed argument denotes the number of parameters you can give | The optional bracketed argument denotes the number of parameters you can give |
Revision as of 16:22, 27 September 2012
\define
Syntax
\define[...]\command{...} | |
[...] | number |
{...} | text |
Description
\define
is like the TeX primitive \def
: it defines a new TeX macro. Unlike \def
, \define
will print an error to the log file if the new definition overwrites an existing command.
The optional bracketed argument denotes the number of parameters you can give to your command. "text" is the result when the macro gets expanded.
Pitfalls
\define
does not use \long, that means in MkII
multiple paragraphs (e.g. through \par or \endgraf)
inside arguments will not work.
The name of the new command may not include numbers.
Example
% wiki mode=mkiv \define\hello{Good morning} % You may not use numbers % \define[1]\mp3{The ID3 Tag of the MP3 file is: #1} % but this will work: \define[1]\mpThree{The ID3 Tag of the MP3 file is: #1} % You can use non-ASCII characters in MkIV, but not in MkII. % This example is compiled using mkiv. \define[1]\KüFst{Küstenfunkstelle, #1!} \starttext \hello \KüFst{12} \stoptext
See also
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