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| author | Michael Albinus <michael.albinus@gmx.de> | 2019-03-09 09:47:07 +0100 |
|---|---|---|
| committer | Michael Albinus <michael.albinus@gmx.de> | 2019-03-09 09:47:07 +0100 |
| commit | a3b193516f991ceaf79d33c6158dd7ef060c7bce (patch) | |
| tree | 17ba49bb720803d716687999eb615361fa1f6377 /doc | |
| parent | a38da0d4e532c7a8ce8f20ee5e95a50fce162469 (diff) | |
| download | emacs-a3b193516f991ceaf79d33c6158dd7ef060c7bce.tar.gz | |
Mention empty strings in file name expansion, emacs lisp reference
* doc/lispref/files.texi (Files, File Name Expansion):
Mention also empty strings.
Diffstat (limited to 'doc')
| -rw-r--r-- | doc/lispref/files.texi | 13 |
1 files changed, 12 insertions, 1 deletions
diff --git a/doc/lispref/files.texi b/doc/lispref/files.texi index 403a21b3365..380e0543ddd 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 -@file{../}). @xref{File Name Expansion}. +@file{../} 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: + +@example +@group +(expand-file-name "." "/usr/spool/") + @result{} "/usr/spool" +(expand-file-name "" "/usr/spool/") + @result{} "/usr/spool" +@end group +@end example + Note that @code{expand-file-name} does @emph{not} expand environment variables; only @code{substitute-in-file-name} does that: |