From: Dima Kogan <dima@secretsauce.net>
Date: Tue, 24 Mar 2015 19:53:08 +0000 (-0700)
Subject: Make ff-find-other-file symmetric for C++ (Bug#20192)
X-Git-Tag: emacs-26.0.90~521^2~308
X-Git-Url: http://git.eshelyaron.com/gitweb/?a=commitdiff_plain;h=08848e33baf16d3137b171205f51839d8fcf7d06;p=emacs.git

Make ff-find-other-file symmetric for C++ (Bug#20192)

`cc-other-file-alist' has a mapping of file extensions to switch
between headers and sources, but the mappings weren't completely
symmetric.  In particular .cpp would map to .hh, but .hh would NOT map
to .cpp.

* lisp/find-file.el (cc-other-file-alist): Map ".hh" and ".h" to all
C++ extensions to make them symmetric with the C++ extensions that map
to them.  This lets repeated invocations of `ff-find-other-file'
toggle between all pairs of sources/headers.
---

diff --git a/lisp/find-file.el b/lisp/find-file.el
index e02bea06fc0..d3691694d17 100644
--- a/lisp/find-file.el
+++ b/lisp/find-file.el
@@ -242,11 +242,11 @@ the preceding slash.  The star represents all the subdirectories except
 
 (defcustom cc-other-file-alist
   '(("\\.cc\\'"  (".hh" ".h"))
-    ("\\.hh\\'"  (".cc" ".C"))
+    ("\\.hh\\'"  (".cc" ".C" ".CC" ".cxx" ".cpp" ".c++"))
 
     ("\\.c\\'"   (".h"))
     ("\\.m\\'"   (".h"))
-    ("\\.h\\'"   (".c" ".cc" ".C" ".CC" ".cxx" ".cpp" ".m"))
+    ("\\.h\\'"   (".c" ".cc" ".C" ".CC" ".cxx" ".cpp" ".c++" ".m"))
 
     ("\\.C\\'"   (".H"  ".hh" ".h"))
     ("\\.H\\'"   (".C"  ".CC"))