I find it occasionally very useful to do a few tests in a cond, then introduce some new symbols (for both clarity and efficiency) that can be referenced in later tests (or matching expressions). This parallels similar functionality inside the for macro, where the :let keyword is matched against a vector of symbol bindings and forms an implicit let around the remainder of the comprehension.
Major
I find it occasionally very useful to do a few tests in a cond, then introduce some new symbols (for both clarity and efficiency) that can be referenced in later tests (or matching expressions). This parallels similar functionality inside the for macro, where the :let keyword is matched against a vector of symbol bindings and forms an implicit let around the remainder of the comprehension.
I'll be adding a patch for this shortly.