diff options
Diffstat (limited to 'lisp/subr.el')
| -rw-r--r-- | lisp/subr.el | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/lisp/subr.el b/lisp/subr.el index 6709ebf0d02..e3cc4b05f3f 100644 --- a/lisp/subr.el +++ b/lisp/subr.el @@ -3246,9 +3246,13 @@ even if this catches the signal." (defmacro with-demoted-errors (format &rest body) "Run BODY and demote any errors to simple messages. +FORMAT is a string passed to `message' to format any error message. +It should contain a single %-sequence; e.g., \"Error: %S\". + If `debug-on-error' is non-nil, run BODY without catching its errors. This is to be used around code which is not expected to signal an error but which should be robust in the unexpected case that an error is signaled. + For backward compatibility, if FORMAT is not a constant string, it is assumed to be part of BODY, in which case the message format used is \"Error: %S\"." |