Adapting the Indentation-Sensitive Languages example for implicit whitespace

[ElnuDev]

I'm trying to adapt the Indentation-Sensitive Languages example in Chapter 3.2 of the Book and it breaks when implicit whitespace is defined. If I define WHITESPACE = _{ " " } then all of the nested blocks are absent in the resulting AST, as presumably this would "eat" all of the indentation. I've messed around a bit with the example but I haven't found a solution. Any ideas? I'm pretty new to pest. Thanks in advance!

[tomtau]

You can potentially prevent implicit whitespaces by using atomic rules: https://pest.rs/book/grammars/syntax.html#atomic

FYI @reivilibre wrote that section about indentation-sensitive languages (and may chime in).