[alexandria-devel] if-let*

[Marco Baringer]

(i think i've already sent this, but it hasn't shown up on the list,
sorry if you get it twice)

hi,

  i recently needed (or just decided that i wanted it) a version of
  if-let with sequential binding. The bindings form is as with if-let,
  however to ensure that only the 'true' bindings are seen in the else
  form (and i'm not convinced this is worth it) the else form is
  repeated multiple times (once per binding) in the macro's expansion.

  the docstring should explain how it works (and if not i'll fix the
  docstring).

  and, since it made sense to me at the time, when-let and when-let* are
  implemented in terms of if-let and if-let* (instead of repeating the
  binding expansion and and code).

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--
-marco