diff options
Diffstat (limited to 'src/eval.c')
| -rw-r--r-- | src/eval.c | 37 |
1 files changed, 24 insertions, 13 deletions
diff --git a/src/eval.c b/src/eval.c index 72facd5db6..33b82f74b6 100644 --- a/src/eval.c +++ b/src/eval.c @@ -1431,6 +1431,7 @@ push_handler_nosignal (Lisp_Object tag_ch_val, enum handlertype handlertype) } +static Lisp_Object signal_or_quit (Lisp_Object, Lisp_Object, bool); static Lisp_Object find_handler_clause (Lisp_Object, Lisp_Object); static bool maybe_call_debugger (Lisp_Object conditions, Lisp_Object sig, Lisp_Object data); @@ -1444,7 +1445,7 @@ process_quit_flag (void) Fkill_emacs (Qnil); if (EQ (Vthrow_on_input, flag)) Fthrow (Vthrow_on_input, Qt); - Fsignal (Qquit, Qnil); + quit (); } DEFUN ("signal", Fsignal, Ssignal, 2, 2, 0, @@ -1460,9 +1461,29 @@ DATA should be a list. Its elements are printed as part of the error message. See Info anchor `(elisp)Definition of signal' for some details on how this error message is constructed. If the signal is handled, DATA is made available to the handler. -See also the function `condition-case'. */) +See also the function `condition-case'. */ + attributes: noreturn) (Lisp_Object error_symbol, Lisp_Object data) { + signal_or_quit (error_symbol, data, false); + eassume (false); +} + +/* Quit, in response to a keyboard quit request. */ +Lisp_Object +quit (void) +{ + return signal_or_quit (Qquit, Qnil, true); +} + +/* Signal an error, or quit. ERROR_SYMBOL and DATA are as with Fsignal. + If KEYBOARD_QUIT, this is a quit; ERROR_SYMBOL should be + Qquit and DATA should be Qnil, and this function may return. + Otherwise this function is like Fsignal and does not return. */ + +static Lisp_Object +signal_or_quit (Lisp_Object error_symbol, Lisp_Object data, bool keyboard_quit) +{ /* When memory is full, ERROR-SYMBOL is nil, and DATA is (REAL-ERROR-SYMBOL . REAL-DATA). That is a special case--don't do this in other situations. */ @@ -1542,7 +1563,7 @@ See also the function `condition-case'. */) = maybe_call_debugger (conditions, error_symbol, data); /* We can't return values to code which signaled an error, but we can continue code which has signaled a quit. */ - if (debugger_called && EQ (real_error_symbol, Qquit)) + if (keyboard_quit && debugger_called && EQ (real_error_symbol, Qquit)) return Qnil; } @@ -1569,16 +1590,6 @@ See also the function `condition-case'. */) fatal ("%s", SDATA (string)); } -/* Internal version of Fsignal that never returns. - Used for anything but Qquit (which can return from Fsignal). */ - -void -xsignal (Lisp_Object error_symbol, Lisp_Object data) -{ - Fsignal (error_symbol, data); - emacs_abort (); -} - /* Like xsignal, but takes 0, 1, 2, or 3 args instead of a list. */ void |