--- gforth/assert.fs	1994/07/08 15:00:28	1.1
+++ gforth/assert.fs	1998/12/08 22:02:35	1.7
@@ -1,37 +1,62 @@
 \ assertions
 
-\ !! factor out line number printing, share with debugging.fs
+\ Copyright (C) 1995,1996,1997 Free Software Foundation, Inc.
 
-variable assert-level \ all assertions above this level are turned off
+\ This file is part of Gforth.
+
+\ Gforth 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 2
+\ of the License, or (at your option) any later version.
+
+\ This program is distributed in the hope that it will be useful,
+\ but WITHOUT ANY WARRANTY; without even the implied warranty of
+\ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+\ GNU General Public License for more details.
+
+\ You should have received a copy of the GNU General Public License
+\ along with this program; if not, write to the Free Software
+\ Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+
+require source.fs
+
+variable assert-level ( -- a-addr ) \ gforth
+\G all assertions above this level are turned off
 1 assert-level !
 
-: assertn ( n -- )
+: assertn ( n -- ) \ gforth assert-n
+    \ this is internal (it is not immediate)
     assert-level @ >
     if
 	POSTPONE (
     then ;
 
-: assert0( ( -- )
+: assert0( ( -- ) \ gforth assert-zero
+    \G important assertions that should always be turned on
     0 assertn ; immediate
-: assert1( ( -- )
+: assert1( ( -- ) \ gforth assert-one
+    \G normal assertions; turned on by default
     1 assertn ; immediate
-: assert2( ( -- )
+: assert2( ( -- ) \ gforth assert-two
+    \G debugging assertions
     2 assertn ; immediate
-: assert3( ( -- )
+: assert3( ( -- ) \ gforth assert-three
+    \G slow assertions that you may not want to turn on in normal debugging;
+    \G you would turn them on mainly for thorough checking
     3 assertn ; immediate
-: assert( ( -- )
+: assert( ( -- ) \ gforth
+    \G equivalent to assert1(
     POSTPONE assert1( ; immediate
 
-: (endassert) ( flag -- )
-    \ three inline arguments
+: (endassert) ( flag -- ) \ gforth-internal
+    \ inline argument sourcepos
     if
-	r> 3 cells + >r EXIT
+	r> sourcepos %size + >r EXIT
     else
-	r>
-	dup 2@ type ." :" cell+ cell+
-	@ 0 .r ." : failed assertion"
+	r> print-sourcepos ." : failed assertion"
 	true abort" assertion failed" \ !! or use a new throw code?
     then ;
 
-: ) ( -- )
-    POSTPONE (endassert) loadfilename 2@ 2, loadline @ , ; immediate
+: ) ( -- ) \ gforth	close-paren
+    \G end an assertion
+    POSTPONE (endassert) sourcepos, ; immediate