[Emacs-diffs] master c189986: Add an optional arguments to string-trim

[Eli Zaretskii]

branch: master
commit c189986b241cbe79b0e027fa08bba710ac645bb3
Author: Jean-Christophe Helary <address@hidden>
Commit: Eli Zaretskii <address@hidden>

    Add an optional arguments to string-trim
    
    * lisp/emacs-lisp/subr-x.el (string-trim-left, string-trim-right)
    (string-trim): Add optional args that serve as defaults per the
    original behavior.  (Bug#26908)
---
 lisp/emacs-lisp/subr-x.el | 24 +++++++++++++++---------
 1 file changed, 15 insertions(+), 9 deletions(-)

diff --git a/lisp/emacs-lisp/subr-x.el b/lisp/emacs-lisp/subr-x.el
index 8a95527..849ac19 100644
--- a/lisp/emacs-lisp/subr-x.el
+++ b/lisp/emacs-lisp/subr-x.el
@@ -178,21 +178,27 @@ VARLIST can just be a plain tuple.
 
 (define-obsolete-function-alias 'string-reverse 'reverse "25.1")
 
-(defsubst string-trim-left (string)
-  "Remove leading whitespace from STRING."
-  (if (string-match "\\`[ \t\n\r]+" string)
+(defsubst string-trim-left (string &optional regexp)
+  "Trim STRING of leading string matching REGEXP.
+
+REGEXP defaults to \"[ \\t\\n\\r]+\"."
+  (if (string-match (concat "\\`\\(?:" (or  regexp "[ \t\n\r]+")"\\)") string)
       (replace-match "" t t string)
     string))
 
-(defsubst string-trim-right (string)
-  "Remove trailing whitespace from STRING."
-  (if (string-match "[ \t\n\r]+\\'" string)
+(defsubst string-trim-right (string &optional regexp)
+  "Trim STRING of trailing string matching REGEXP.
+
+REGEXP defaults to  \"[ \\t\\n\\r]+\"."
+  (if (string-match (concat "\\(?:" (or regexp "[ \t\n\r]+") "\\)\\'") string)
       (replace-match "" t t string)
     string))
 
-(defsubst string-trim (string)
-  "Remove leading and trailing whitespace from STRING."
-  (string-trim-left (string-trim-right string)))
+(defsubst string-trim (string &optional trim-left trim-right)
+  "Trim STRING of leading and trailing strings matching TRIM-LEFT and 
TRIM-RIGHT.
+
+TRIM-LEFT and TRIM-RIGHT default to \"[ \\t\\n\\r]+\"."
+  (string-trim-left (string-trim-right string trim-right) trim-left))
 
 (defsubst string-blank-p (string)
   "Check whether STRING is either empty or only whitespace."