doc/todo/nested_preprocessor_directives.mdwn

   1 Ikiwiki's preprocessor parser cannot deal with arbitrary nested preprocesor
   2 directives. It's possible to nest a directive with single quoted values
   3 inside a triple-quoted value of a directive, but that's all.
   4
   5 It's not possible to unambiguously parse nested quotes, so to support
   6 nesting, a new syntax would be needed. Maybe something xml-like?
   7
   8 > You can, however, unambiguously parse nested square brackets, and I think
   9 > that would solve the problem, as long as you never allow the contents of a
  10 > directive to contain a *partial* directive, which seems reasonable to me.
  11 >
  12 > For example, I *think* you can unambiguously parse the following:
  13 >
  14 >     \[[!if test="enabled(template) and templates/foo" then="""
  15 >     [[!template id=foo content="""Flying Purple People Eater"""]]
  16 >     """]]
  17 >
  18 > --[[JoshTriplett]]