FEATURE REQUEST: Create "lazy" flatten() alternative that respects map(), pick(n), etc.

[rsevero]

It would be great to have a "lazy" alternative to flatten() that respects map(), pick(n) etc.

I don´t know if there is something that would only work with this new feature but some intuitive options would "work as expected" like:

  Parser bracketStringTemplate(Parser content) =>
      (char('[') & content & char(']')).pick(1).lazyFlatten();
  Parser bracketStringGeneral() => bracketStringTemplate(noneOf('[]').star());

or

  Parser bracketStringTemplate(Parser content) =>
      content.skip(before: char('['), after:  char(']')).lazyFlatten();
  Parser bracketStringGeneral() => bracketStringTemplate(noneOf('[]').star());

or even

  Parser bracketStringTemplate(Parser content) =>
      content.skip(before: char('['), after:  char(']'));
  Parser bracketStringGeneral() => bracketStringTemplate(noneOf('[]').star()).lazyFlatten();

which must currently be rewritten to:

  Parser bracketStringTemplate(Parser content) =>
      (char('[') & content.flatten() & char(']')).pick(1);
  Parser bracketStringGeneral() => bracketStringTemplate(noneOf('[]').star());

[renggli]

Thank you for the suggestion, but not clear how that could be implemented in a general way?

I typically create explicit helper functions that create more complicated compositions of common parser patterns, much like in your last example.