Support mksh-specific function names in imenu

* lisp/progmodes/sh-script.el (sh-imenu-generic-expression): Add
mksh-specific function names to imenu-generic-expression
(bug#55889).

1 files changed, 16 insertions, 3 deletions

diff --git a/lisp/progmodes/sh-script.el b/lisp/progmodes/sh-script.el
index 4d2554c0870..04f65b8dcad 100644
--- a/lisp/progmodes/sh-script.el
+++ b/lisp/progmodes/sh-script.el
@@ -286,7 +286,7 @@ naming the shell."
   :group 'sh-script)
 
 (defcustom sh-imenu-generic-expression
-  '((sh
+  `((sh
      . ((nil
          ;; function FOO
          ;; function FOO()
@@ -295,8 +295,21 @@ naming the shell."
         ;; FOO()
         (nil
          "^\\s-*\\([[:alpha:]_][[:alnum:]_]*\\)\\s-*()"
-         1)
-        )))
+         1)))
+    (mksh
+     . ((nil
+         ;; function FOO
+         ;; function FOO()
+         ,(rx bol (* (syntax whitespace)) "function" (+ (syntax whitespace))
+              (group (1+ (not (any "\0\t\n \"$&'();<=>\\`|#*?[]/"))))
+              (* (syntax whitespace)) (? "()"))
+         1)
+        (nil
+         ;; FOO()
+         ,(rx bol (* (syntax whitespace))
+              (group (1+ (not (any "\0\t\n \"$&'();<=>\\`|#*?[]/"))))
+              (* (syntax whitespace)) "()")
+         1))))
   "Alist of regular expressions for recognizing shell function definitions.
 See `sh-feature' and `imenu-generic-expression'."
   :type '(alist :key-type (symbol :tag "Shell")