The docs say:

Macros are expanded at compile time and inserted in places they are used

Now consider this grammar:

id[el]		-> $el		{% id %}

plain_test	-> word		{% id %}
macro_test	-> id[word]	{% id %}

word		-> [\w]:+	{% d => d[0].join("") %}

Given above documentation and grammar I would have expected that macro_test would behave exactly like plain_test . Unfortunately the results differ:

plain_test('asd') ~> 'asd'
macro_test('asd') ~> ['asd']

My current workaround is to manually unwrap the argument expansions in all my macros, like so:

id[el]		-> $el		{% d => d[0][0] %}

However, this is far from ideal.

I'm not sure if this is a code or documentation bug. But I would definitely prefer if macros would not cause this additional wrapping. It gets especially annoying if you have nested macro application.