procedure->macro vs procedure->memoizing-macro again

[Sergey Dolin]

Some time ago I described the problem. And had got the solution.
But it does not works for all cases.

I want to have (http:let ...) macros:

(define-macro (http:let bindings . body)
        `(let (,@bindings
                   ,@(some-bindings-generator))
                   ,@body))

Looks nice. But (some-bindings-generator) is called only once because
of implementstion define-macro with procedure->memoizing-macro.
I've broken my head...

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