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Document `letrec'

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* doc/lispref/variables.texi (Local Variables): Document letrec
(bug#21048).

* lisp/subr.el (letrec): Expand the doc string slightly.
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Lars Ingebrigtsen 2019-10-09 06:06:24 +02:00
parent 43310f4387
commit 489a106b1c
2 changed files with 12 additions and 1 deletions
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lisp/subr.el
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@ -1739,7 +1739,9 @@ the hook's buffer-local value rather than its default value."
The value of the last form in BODY is returned.
Each element of BINDERS is a list (SYMBOL VALUEFORM) which binds
SYMBOL to the value of VALUEFORM.
All symbols are bound before the VALUEFORMs are evalled."
The main difference between this macro and `let'/`let*' is that
all symbols are bound before any of the VALUEFORMs are evalled."
;; Only useful in lexical-binding mode.
;; As a special-form, we could implement it more efficiently (and cleanly,
;; making the vars actually unbound during evaluation of the binders).