Re: defmacro with built-in gensym declaration and initialization

[Stefan Monnier]

> What's the purpose of TEST in macroexp-let2, then, other than to
> minimise bindings in the expansion?

The purpose is indeed just one of optimization applied to the
source code.

> (Which I presume is only relevant when Elisp's byte compiler is used
> to compile the expanded form.)

It's relevant both when the code is byte-compiled and when
it's interpreted.  But that depends on implementation details, so indeed
it can become useless in the future if/when we improve the interpreter
and/or compiler.  I don't know if it's still relevant when using the
native compiler, indeed.


        Stefan