Is this a bug or feature?

[Mohammad]

• open https://tiddlywiki.com/
• create a tiddler with below content

\define printf(x) This is $x$

<<printf "$(currentTiddler)$">>

$(currentTiddler)$

You get

This is New Tiddler

$(currentTiddler)$

One expects to the $(currentTiddler)$ does not work!

[saqimtiaz]

Macros first substitute macro parameters, then variables. So yes, it is expected to work.

Edit: the tricks posted here rely on this.