How to insert a transclusion as a parameter of the tag Macro

#1

I’ve read the documentation for $macrocall (MacroCallWidget) and thought it was simple (and it probably is) but sadly I haven’t been able to do it.
The situation is this, I have a field FieldX where I’m going to enter a tag name (which can change). I would like to put this value which can change as an argument of the Macro tag.
Something like this:

1  <<tag {{Tiddler!!FieldX}}>>

2  <$macrocall $name="tag" text={{Tiddler!!FieldX}}/>

In case 2, it defaults to the current tiddler. (As can be seen in the documentation for tag Macro)

  • How should I do?
#2

The definition of the TWCore tag macro can be found here: $:/core/macros/tag

The parameter name used by the macro definition is “tag”, not “text”.

Your “case 2” should be written like this:

<$macrocall $name="tag" tag={{Tiddler!!FieldX}}/>
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#3

It works, I assumed the structure of the macrocall was fixed and that it did not vary according to the macro. Thank you Eric!

#4

One way to think of this is that the way we often invoke macros <<tag>> is a short form for convenience and allows unnamed parameters which are used in the order they are defined in the definition.

Just as the $transclusion widget is the long form of {{template}} {{||template}} or {{tiddlername||template}} the macrocall widget is the long form of calling macros.

  • Also remember because your macro may want a parameter called “name”, we need to use the '$name=macroname"
  • Thus we use the macrocall widget if we want to pass in parameters defined elsewhere
    • There are some tricks to using the short form for this but its simple to just revert to the macrocall widget.
  • There are new methods coming with TW 5.3.0
1 Like
#5

Very interesting, crystal clear. Thank you!