Commit 0a2546d4 authored by Richard M. Stallman's avatar Richard M. Stallman
Browse files

(Fvariable_binding_locus): New function.

(syms_of_data): defsubr it.
(Flocal_variable_p): Delete duplicate call to indirect_variable.
parent 2b99c69a
......@@ -1706,7 +1706,6 @@ BUFFER defaults to the current buffer. */)
{
Lisp_Object tail, elt;
variable = indirect_variable (variable);
for (tail = buf->local_var_alist; CONSP (tail); tail = XCDR (tail))
{
elt = XCAR (tail);
......@@ -1765,6 +1764,41 @@ BUFFER defaults to the current buffer. */)
}
return Qnil;
}
DEFUN ("variable-binding-locus", Fvariable_binding_locus, Svariable_binding_locus,
1, 1, 0,
doc: /* Return a value indicating where VARIABLE's current binding comes from.
If the current binding is buffer-local, the value is the current buffer.
If the current binding is frame-local, the value is the selected frame.
If the current binding is global (the default), the value is nil. */)
(variable)
register Lisp_Object variable;
{
Lisp_Object valcontents;
CHECK_SYMBOL (variable);
variable = indirect_variable (variable);
/* Make sure the current binding is actually swapped in. */
find_symbol_value (variable);
valcontents = XSYMBOL (variable)->value;
if (BUFFER_LOCAL_VALUEP (valcontents)
|| SOME_BUFFER_LOCAL_VALUEP (valcontents)
|| BUFFER_OBJFWDP (valcontents))
{
/* For a local variable, record both the symbol and which
buffer's or frame's value we are saving. */
if (!NILP (Flocal_variable_p (variable, Qnil)))
return Fcurrent_buffer ();
else if (!BUFFER_OBJFWDP (valcontents)
&& XBUFFER_LOCAL_VALUE (valcontents)->found_for_frame)
return XBUFFER_LOCAL_VALUE (valcontents)->frame;
}
return Qnil;
}
/* Find the function at the end of a chain of symbol function indirections. */
......@@ -3185,6 +3219,7 @@ syms_of_data ()
defsubr (&Smake_variable_frame_local);
defsubr (&Slocal_variable_p);
defsubr (&Slocal_variable_if_set_p);
defsubr (&Svariable_binding_locus);
defsubr (&Saref);
defsubr (&Saset);
defsubr (&Snumber_to_string);
......
Markdown is supported
0% or .
You are about to add 0 people to the discussion. Proceed with caution.
Finish editing this message first!
Please register or to comment