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Re: An idea: combine-change-calls


From: Stefan Monnier
Subject: Re: An idea: combine-change-calls
Date: Mon, 26 Mar 2018 20:36:15 -0400
User-agent: Gnus/5.13 (Gnus v5.13) Emacs/27.0.50 (gnu/linux)

>    (defmacro combine-change-calls (beg end &rest form)
>       `(let* ((-beg- ,beg)
>               (-end- ,end)
>               (body (lambda () ,@form))

Don't use `let*` here since otherwise you have a variable capture if
`form` uses variables with name -beg- or -end-, or if the expression
`end` uses a variable named -beg-.

[ and a nitpick: `form` is usually used for a single expression whereas
  here it holds a list of expressions, so I'd call it `forms`.  ]


        Stefan



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