While Jed and Tony gave great examples, I add the below code as an
alternative method to simulate if-clause.
\define _maca(x) This is Macro ''A'': $x$
\define _macb(y) This is Macro ''B'': $y$
\define polymorph(input, cond:"a")
<$reveal type="match" text=$cond$ default="a")>
<<_maca $input$>>
</$reveal>
<$reveal type="match" text=$cond$ default="b")>
<<_macb $input$>>
</$reveal>
\end
Examples
<<polymorph "Hi">>
<<polymorph input:"Hello">>
<<polymorph input:"Hola" "b">>
<<polymorph input:"Hola" cond:"b">>
And outputs:
This is Macro *A*: Hi
This is Macro *A*: Hello
This is Macro *B*: Hola
This is Macro *B*: Hola
Anyway I saw in TW5.18.1pr some new operators such as range, and contains
have been added, I hope developers specially Jeremy consider adding more
programming capabilities among them are the IF-Clause into the core!
Cheers
Mohammad
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