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[Emacs-diffs] emacs-26 a3b1935: Mention empty strings in file name expan
From: |
Michael Albinus |
Subject: |
[Emacs-diffs] emacs-26 a3b1935: Mention empty strings in file name expansion, emacs lisp reference |
Date: |
Sat, 9 Mar 2019 03:47:15 -0500 (EST) |
branch: emacs-26
commit a3b193516f991ceaf79d33c6158dd7ef060c7bce
Author: Michael Albinus <address@hidden>
Commit: Michael Albinus <address@hidden>
Mention empty strings in file name expansion, emacs lisp reference
* doc/lispref/files.texi (Files, File Name Expansion):
Mention also empty strings.
---
doc/lispref/files.texi | 13 ++++++++++++-
1 file changed, 12 insertions(+), 1 deletion(-)
diff --git a/doc/lispref/files.texi b/doc/lispref/files.texi
index 403a21b..380e054 100644
--- a/doc/lispref/files.texi
+++ b/doc/lispref/files.texi
@@ -16,7 +16,7 @@ described in @ref{Backups and Auto-Saving}.
names. A file name is a string. Most of these functions expand file
name arguments using the function @code{expand-file-name}, so that
@file{~} is handled correctly, as are relative file names (including
address@hidden/}). @xref{File Name Expansion}.
address@hidden/} and the empty string). @xref{File Name Expansion}.
In addition, certain @dfn{magic} file names are handled specially.
For example, when a remote file name is specified, Emacs accesses the
@@ -2409,6 +2409,17 @@ This is for the sake of filesystems that have the
concept of a
superroot above the root directory @file{/}. On other filesystems,
@file{/../} is interpreted exactly the same as @file{/}.
+Expanding @file{.} or the empty string returns the default directory:
+
address@hidden
address@hidden
+(expand-file-name "." "/usr/spool/")
+ @result{} "/usr/spool"
+(expand-file-name "" "/usr/spool/")
+ @result{} "/usr/spool"
address@hidden group
address@hidden example
+
Note that @code{expand-file-name} does @emph{not} expand environment
variables; only @code{substitute-in-file-name} does that:
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