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macro-let and *macroexpand-hook*
Well, I've looked through the archives and I've read through the silver
book but I still can't tell whether or not expansion of macro-let'ed
macros is supposed to use *macroexpand-hook* or not. It is clear that
the environment argument passed to macroexpand-1 must contain those
lexically-defined macros, but should *macroexpand-hook* be prepared to
deal with them?
It seems like the right thing is that *macroexpand-hook* should, indeed,
be called, but it makes it harder to write a portable memoization
facility; at least one such facility, in the Spice Lisp code, assumes
that macro-function will retrieve the expansion function for any macro
it is asked to deal with.