X-Git-Url: https://git.notmuchmail.org/git?p=notmuch;a=blobdiff_plain;f=emacs%2Fnotmuch-compat.el;h=2cedd39d5eb8e98604b4497ea70bf7106ab1a4c2;hp=2975f4c2ec1bffb31a4e1e4110544b82a2d2a01d;hb=HEAD;hpb=0f37509cc7e92f2c09fcd7d7f3e2b477e4f29401

diff --git a/emacs/notmuch-compat.el b/emacs/notmuch-compat.el
index 2975f4c2..179bf59c 100644
--- a/emacs/notmuch-compat.el
+++ b/emacs/notmuch-compat.el
@@ -1,4 +1,4 @@
-;;; notmuch-compat.el --- compatibility functions for earlier versions of emacs
+;;; notmuch-compat.el --- compatibility functions for earlier versions of emacs  -*- lexical-binding: t -*-
 ;;
 ;; The functions in this file are copied from more modern versions of
 ;; emacs and are Copyright (C) 1985-1986, 1992, 1994-1995, 1999-2017
@@ -41,7 +41,17 @@
 (unless (fboundp 'message--fold-long-headers)
   (add-hook 'message-header-hook 'notmuch-message--fold-long-headers))
 
-;; End of compatibility functions
+;; `dlet' isn't available until Emacs 28.1.  Below is a copy, with the
+;; addition of `with-no-warnings'.
+(defmacro notmuch-dlet (binders &rest body)
+  "Like `let*' but using dynamic scoping."
+  (declare (indent 1) (debug let))
+  `(let (_)
+     (with-no-warnings  ; Quiet "lacks a prefix" warning.
+       ,@(mapcar (lambda (binder)
+		   `(defvar ,(if (consp binder) (car binder) binder)))
+		 binders))
+     (let* ,binders ,@body)))
 
 (provide 'notmuch-compat)