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