/* Evaluator for GNU Emacs Lisp interpreter.
Copyright (C) 1985, 1986, 1987, 1993, 1994, 1995, 1999, 2000, 2001,
- 2002, 2003, 2004, 2005, 2006, 2007, 2008
+ 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009
Free Software Foundation, Inc.
This file is part of GNU Emacs.
-GNU Emacs is free software; you can redistribute it and/or modify
+GNU Emacs is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
-the Free Software Foundation; either version 3, or (at your option)
-any later version.
+the Free Software Foundation, either version 3 of the License, or
+(at your option) any later version.
GNU Emacs is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
-along with GNU Emacs; see the file COPYING. If not, write to
-the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
-Boston, MA 02110-1301, USA. */
+along with GNU Emacs. If not, see <http://www.gnu.org/licenses/>. */
#include <config.h>
extern Lisp_Object Qrisky_local_variable;
+extern Lisp_Object Qfunction;
+
static Lisp_Object funcall_lambda P_ ((Lisp_Object, int, Lisp_Object*));
static void unwind_to_catch P_ ((struct catchtag *, Lisp_Object)) NO_RETURN;
if (SPECPDL_INDEX () + 100 > max_specpdl_size)
max_specpdl_size = SPECPDL_INDEX () + 100;
-#ifdef HAVE_X_WINDOWS
+#ifdef HAVE_WINDOW_SYSTEM
if (display_hourglass_p)
cancel_hourglass ();
#endif
}
DEFUN ("prog1", Fprog1, Sprog1, 1, UNEVALLED, 0,
- doc: /* Eval FIRST and BODY sequentially; value from FIRST.
+ doc: /* Eval FIRST and BODY sequentially; return value from FIRST.
The value of FIRST is saved during the evaluation of the remaining args,
whose values are discarded.
usage: (prog1 FIRST BODY...) */)
}
DEFUN ("prog2", Fprog2, Sprog2, 2, UNEVALLED, 0,
- doc: /* Eval FORM1, FORM2 and BODY sequentially; value from FORM2.
+ doc: /* Eval FORM1, FORM2 and BODY sequentially; return value from FORM2.
The value of FORM2 is saved during the evaluation of the
remaining args, whose values are discarded.
usage: (prog2 FORM1 FORM2 BODY...) */)
register Lisp_Object val, sym;
struct gcpro gcpro1;
- if (NILP(args))
+ if (NILP (args))
return Qnil;
args_left = args;
(args)
Lisp_Object args;
{
+ if (!NILP (Fcdr (args)))
+ xsignal2 (Qwrong_number_of_arguments, Qquote, Flength (args));
return Fcar (args);
}
(args)
Lisp_Object args;
{
+ if (!NILP (Fcdr (args)))
+ xsignal2 (Qwrong_number_of_arguments, Qfunction, Flength (args));
return Fcar (args);
}
and the result should be a form to be evaluated instead of the original.
DECL is a declaration, optional, which can specify how to indent
-calls to this macro and how Edebug should handle it. It looks like this:
+calls to this macro, how Edebug should handle it, and which argument
+should be treated as documentation. It looks like this:
(declare SPECS...)
The elements can look like this:
(indent INDENT)
(debug DEBUG)
Set NAME's `edebug-form-spec' property to DEBUG. (This is
equivalent to writing a `def-edebug-spec' for the macro.)
+
+ (doc-string ELT)
+ Set NAME's `doc-string-elt' property to ELT.
+
usage: (defmacro NAME ARGLIST [DOCSTRING] [DECL] BODY...) */)
(args)
Lisp_Object args;
doc: /* Make NEW-ALIAS a variable alias for symbol BASE-VARIABLE.
Aliased variables always have the same value; setting one sets the other.
Third arg DOCSTRING, if non-nil, is documentation for NEW-ALIAS. If it is
- omitted or nil, NEW-ALIAS gets the documentation string of BASE-VARIABLE,
- or of the variable at the end of the chain of aliases, if BASE-VARIABLE is
- itself an alias.
+omitted or nil, NEW-ALIAS gets the documentation string of BASE-VARIABLE,
+or of the variable at the end of the chain of aliases, if BASE-VARIABLE is
+itself an alias. If NEW-ALIAS is bound, and BASE-VARIABLE is not,
+then the value of BASE-VARIABLE is set to that of NEW-ALIAS.
The return value is BASE-VARIABLE. */)
(new_alias, base_variable, docstring)
Lisp_Object new_alias, base_variable, docstring;
error ("Cannot make a constant an alias");
sym = XSYMBOL (new_alias);
+ /* http://lists.gnu.org/archive/html/emacs-devel/2008-04/msg00834.html
+ If n_a is bound, but b_v is not, set the value of b_v to n_a.
+ This is for the sake of define-obsolete-variable-alias and user
+ customizations. */
+ if (NILP (Fboundp (base_variable)) && !NILP (Fboundp (new_alias)))
+ XSYMBOL(base_variable)->value = sym->value;
sym->indirect_variable = 1;
sym->value = base_variable;
sym->constant = SYMBOL_CONSTANT_P (base_variable);
return Qnil;
}
+static Lisp_Object
+lisp_indirect_variable (Lisp_Object sym)
+{
+ XSETSYMBOL (sym, indirect_variable (XSYMBOL (sym)));
+ return sym;
+}
+
DEFUN ("user-variable-p", Fuser_variable_p, Suser_variable_p, 1, 1, 0,
doc: /* Return t if VARIABLE is intended to be set and modified by users.
\(The alternative is a variable used internally in a Lisp program.)
/* If indirect and there's an alias loop, don't check anything else. */
if (XSYMBOL (variable)->indirect_variable
- && NILP (internal_condition_case_1 (indirect_variable, variable,
+ && NILP (internal_condition_case_1 (lisp_indirect_variable, variable,
Qt, user_variable_p_eh)))
return Qnil;
GCPRO2 (args, *temps);
gcpro2.nvars = 0;
- for (argnum = 0; !NILP (varlist); varlist = Fcdr (varlist))
+ for (argnum = 0; CONSP (varlist); varlist = XCDR (varlist))
{
QUIT;
- elt = Fcar (varlist);
+ elt = XCAR (varlist);
if (SYMBOLP (elt))
temps [argnum++] = Qnil;
else if (! NILP (Fcdr (Fcdr (elt))))
UNGCPRO;
varlist = Fcar (args);
- for (argnum = 0; !NILP (varlist); varlist = Fcdr (varlist))
+ for (argnum = 0; CONSP (varlist); varlist = XCDR (varlist))
{
- elt = Fcar (varlist);
+ elt = XCAR (varlist);
tem = temps[argnum++];
if (SYMBOLP (elt))
specbind (elt, tem);
#if HAVE_X_WINDOWS
/* If x_catch_errors was done, turn it off now.
(First we give unbind_to a chance to do that.) */
+#if 0 /* This would disable x_catch_errors after x_connection_closed.
+ * The catch must remain in effect during that delicate
+ * state. --lorentey */
x_fully_uncatch_errors ();
+#endif
#endif
byte_stack_list = catch->byte_stack;
\f
static Lisp_Object find_handler_clause P_ ((Lisp_Object, Lisp_Object,
- Lisp_Object, Lisp_Object,
- Lisp_Object *));
+ Lisp_Object, Lisp_Object));
DEFUN ("signal", Fsignal, Ssignal, 2, 2, 0,
doc: /* Signal an error. Args are ERROR-SYMBOL and associated DATA.
Lisp_Object conditions;
extern int gc_in_progress;
extern int waiting_for_input;
- Lisp_Object debugger_value;
Lisp_Object string;
Lisp_Object real_error_symbol;
struct backtrace *bp;
#if 0 /* rms: I don't know why this was here,
but it is surely wrong for an error that is handled. */
-#ifdef HAVE_X_WINDOWS
+#ifdef HAVE_WINDOW_SYSTEM
if (display_hourglass_p)
cancel_hourglass ();
#endif
register Lisp_Object clause;
clause = find_handler_clause (handlerlist->handler, conditions,
- error_symbol, data, &debugger_value);
+ error_symbol, data);
if (EQ (clause, Qlambda))
{
handlerlist = allhandlers;
/* If no handler is present now, try to run the debugger,
and if that fails, throw to top level. */
- find_handler_clause (Qerror, conditions, error_symbol, data, &debugger_value);
+ find_handler_clause (Qerror, conditions, error_symbol, data);
if (catchlist != 0)
Fthrow (Qtop_level, Qt);
return 0;
}
+/* Call the debugger if calling it is currently enabled for CONDITIONS.
+ SIG and DATA describe the signal, as in find_handler_clause. */
+
+static int
+maybe_call_debugger (conditions, sig, data)
+ Lisp_Object conditions, sig, data;
+{
+ Lisp_Object combined_data;
+
+ combined_data = Fcons (sig, data);
+
+ if (
+ /* Don't try to run the debugger with interrupts blocked.
+ The editing loop would return anyway. */
+ ! INPUT_BLOCKED_P
+ /* Does user want to enter debugger for this kind of error? */
+ && (EQ (sig, Qquit)
+ ? debug_on_quit
+ : wants_debugger (Vdebug_on_error, conditions))
+ && ! skip_debugger (conditions, combined_data)
+ /* rms: what's this for? */
+ && when_entered_debugger < num_nonmacro_input_events)
+ {
+ call_debugger (Fcons (Qerror, Fcons (combined_data, Qnil)));
+ return 1;
+ }
+
+ return 0;
+}
+
/* Value of Qlambda means we have called debugger and user has continued.
There are two ways to pass SIG and DATA:
= SIG is the error symbol, and DATA is the rest of the data.
= SIG is nil, and DATA is (SYMBOL . REST-OF-DATA).
This is for memory-full errors only.
- Store value returned from debugger into *DEBUGGER_VALUE_PTR.
-
We need to increase max_specpdl_size temporarily around
anything we do that can push on the specpdl, so as not to get
a second error here in case we're handling specpdl overflow. */
static Lisp_Object
-find_handler_clause (handlers, conditions, sig, data, debugger_value_ptr)
+find_handler_clause (handlers, conditions, sig, data)
Lisp_Object handlers, conditions, sig, data;
- Lisp_Object *debugger_value_ptr;
{
register Lisp_Object h;
register Lisp_Object tem;
+ int debugger_called = 0;
+ int debugger_considered = 0;
- if (EQ (handlers, Qt)) /* t is used by handlers for all conditions, set up by C code. */
+ /* t is used by handlers for all conditions, set up by C code. */
+ if (EQ (handlers, Qt))
return Qt;
+
+ /* Don't run the debugger for a memory-full error.
+ (There is no room in memory to do that!) */
+ if (NILP (sig))
+ debugger_considered = 1;
+
/* error is used similarly, but means print an error message
and run the debugger if that is enabled. */
if (EQ (handlers, Qerror)
|| !NILP (Vdebug_on_signal)) /* This says call debugger even if
there is a handler. */
{
- int debugger_called = 0;
- Lisp_Object sig_symbol, combined_data;
- /* This is set to 1 if we are handling a memory-full error,
- because these must not run the debugger.
- (There is no room in memory to do that!) */
- int no_debugger = 0;
-
- if (NILP (sig))
- {
- combined_data = data;
- sig_symbol = Fcar (data);
- no_debugger = 1;
- }
- else
- {
- combined_data = Fcons (sig, data);
- sig_symbol = sig;
- }
-
- if (wants_debugger (Vstack_trace_on_error, conditions))
+ if (!NILP (sig) && wants_debugger (Vstack_trace_on_error, conditions))
{
+ max_lisp_eval_depth += 15;
max_specpdl_size++;
#ifdef PROTOTYPES
internal_with_output_to_temp_buffer ("*Backtrace*",
Fbacktrace, Qnil);
#endif
max_specpdl_size--;
+ max_lisp_eval_depth -= 15;
}
- if (! no_debugger
- /* Don't try to run the debugger with interrupts blocked.
- The editing loop would return anyway. */
- && ! INPUT_BLOCKED_P
- && (EQ (sig_symbol, Qquit)
- ? debug_on_quit
- : wants_debugger (Vdebug_on_error, conditions))
- && ! skip_debugger (conditions, combined_data)
- && when_entered_debugger < num_nonmacro_input_events)
+
+ if (!debugger_considered)
{
- *debugger_value_ptr
- = call_debugger (Fcons (Qerror,
- Fcons (combined_data, Qnil)));
- debugger_called = 1;
+ debugger_considered = 1;
+ debugger_called = maybe_call_debugger (conditions, sig, data);
}
+
/* If there is no handler, return saying whether we ran the debugger. */
if (EQ (handlers, Qerror))
{
return Qt;
}
}
+
for (h = handlers; CONSP (h); h = Fcdr (h))
{
Lisp_Object handler, condit;
/* Handle a list of condition names in handler HANDLER. */
else if (CONSP (condit))
{
- while (CONSP (condit))
+ Lisp_Object tail;
+ for (tail = condit; CONSP (tail); tail = XCDR (tail))
{
- tem = Fmemq (Fcar (condit), conditions);
+ tem = Fmemq (Fcar (tail), conditions);
if (!NILP (tem))
- return handler;
- condit = XCDR (condit);
+ {
+ /* This handler is going to apply.
+ Does it allow the debugger to run first? */
+ if (! debugger_considered && !NILP (Fmemq (Qdebug, condit)))
+ maybe_call_debugger (conditions, sig, data);
+ return handler;
+ }
}
}
}
+
return Qnil;
}
{
register Lisp_Object fun;
register Lisp_Object funcar;
+ Lisp_Object if_prop = Qnil;
fun = function;
- fun = indirect_function (fun);
- if (EQ (fun, Qunbound))
+ fun = indirect_function (fun); /* Check cycles. */
+ if (NILP (fun) || EQ (fun, Qunbound))
return Qnil;
+ /* Check an `interactive-form' property if present, analogous to the
+ function-documentation property. */
+ fun = function;
+ while (SYMBOLP (fun))
+ {
+ Lisp_Object tmp = Fget (fun, intern ("interactive-form"));
+ if (!NILP (tmp))
+ if_prop = Qt;
+ fun = Fsymbol_function (fun);
+ }
+
/* Emacs primitives are interactive if their DEFUN specifies an
interactive spec. */
if (SUBRP (fun))
- {
- if (XSUBR (fun)->prompt)
- return Qt;
- else
- return Qnil;
- }
+ return XSUBR (fun)->intspec ? Qt : if_prop;
/* Bytecode objects are interactive if they are long enough to
have an element whose index is COMPILED_INTERACTIVE, which is
where the interactive spec is stored. */
else if (COMPILEDP (fun))
return ((ASIZE (fun) & PSEUDOVECTOR_SIZE_MASK) > COMPILED_INTERACTIVE
- ? Qt : Qnil);
+ ? Qt : if_prop);
/* Strings and vectors are keyboard macros. */
- if (NILP (for_call_interactively) && (STRINGP (fun) || VECTORP (fun)))
- return Qt;
+ if (STRINGP (fun) || VECTORP (fun))
+ return (NILP (for_call_interactively) ? Qt : Qnil);
/* Lists may represent commands. */
if (!CONSP (fun))
return Qnil;
funcar = XCAR (fun);
if (EQ (funcar, Qlambda))
- return Fassq (Qinteractive, Fcdr (XCDR (fun)));
+ return !NILP (Fassq (Qinteractive, Fcdr (XCDR (fun)))) ? Qt : if_prop;
if (EQ (funcar, Qautoload))
- return Fcar (Fcdr (Fcdr (XCDR (fun))));
+ return !NILP (Fcar (Fcdr (Fcdr (XCDR (fun))))) ? Qt : if_prop;
else
return Qnil;
}
The value saved here is to be restored into Vautoload_queue. */
record_unwind_protect (un_autoload, Vautoload_queue);
Vautoload_queue = Qt;
- Fload (Fcar (Fcdr (fundef)), Qnil, noninteractive ? Qt : Qnil, Qnil, Qt);
+ Fload (Fcar (Fcdr (fundef)), Qnil, Qt, Qnil, Qt);
/* Once loading finishes, don't undo it. */
Vautoload_queue = Qt;
else
error ("Invalid byte code");
}
- AREF (object, COMPILED_BYTECODE) = XCAR (tem);
- AREF (object, COMPILED_CONSTANTS) = XCDR (tem);
+ ASET (object, COMPILED_BYTECODE, XCAR (tem));
+ ASET (object, COMPILED_CONSTANTS, XCDR (tem));
}
return object;
}
specbind (symbol, value)
Lisp_Object symbol, value;
{
- Lisp_Object ovalue;
Lisp_Object valcontents;
CHECK_SYMBOL (symbol);
}
else
{
- Lisp_Object valcontents;
-
- ovalue = find_symbol_value (symbol);
+ Lisp_Object ovalue = find_symbol_value (symbol);
specpdl_ptr->func = 0;
specpdl_ptr->old_value = ovalue;
valcontents = XSYMBOL (symbol)->value;
if (BUFFER_LOCAL_VALUEP (valcontents)
- || SOME_BUFFER_LOCAL_VALUEP (valcontents)
|| BUFFER_OBJFWDP (valcontents))
{
Lisp_Object where, current_buffer;
buffer's or frame's value we are saving. */
if (!NILP (Flocal_variable_p (symbol, Qnil)))
where = current_buffer;
- else if (!BUFFER_OBJFWDP (valcontents)
+ else if (BUFFER_LOCAL_VALUEP (valcontents)
&& XBUFFER_LOCAL_VALUE (valcontents)->found_for_frame)
where = XBUFFER_LOCAL_VALUE (valcontents)->frame;
else
specpdl_ptr->symbol = symbol;
specpdl_ptr++;
- if (BUFFER_OBJFWDP (ovalue) || KBOARD_OBJFWDP (ovalue))
- store_symval_forwarding (symbol, ovalue, value, NULL);
- else
- set_internal (symbol, value, 0, 1);
+ /* We used to do
+ if (BUFFER_OBJFWDP (ovalue) || KBOARD_OBJFWDP (ovalue))
+ store_symval_forwarding (symbol, ovalue, value, NULL);
+ else
+ but ovalue comes from find_symbol_value which should never return
+ such an internal value. */
+ eassert (!(BUFFER_OBJFWDP (ovalue) || KBOARD_OBJFWDP (ovalue)));
+ set_internal (symbol, value, 0, 1);
}
}
if one of its condition symbols appears in the list.
When you evaluate an expression interactively, this variable
is temporarily non-nil if `eval-expression-debug-on-error' is non-nil.
-See also variable `debug-on-quit'. */);
+The command `toggle-debug-on-error' toggles this.
+See also the variable `debug-on-quit'. */);
Vdebug_on_error = Qnil;
DEFVAR_LISP ("debug-ignored-errors", &Vdebug_ignored_errors,
HCoop / bpt / emacs.git / blobdiff