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\ assertions
\ Copyright (C) 1995 Free Software Foundation, Inc.
\ 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 -- ) \ gforth assert-n
\ this is internal (it is not immediate)
assert-level @ >
if
POSTPONE (
then ;
: assert0( ( -- ) \ gforth assert-zero
\G important assertions that should always be turned on
0 assertn ; immediate
: assert1( ( -- ) \ gforth assert-one
\G normal assertions; turned on by default
1 assertn ; immediate
: assert2( ( -- ) \ gforth assert-two
\G debugging assertions
2 assertn ; immediate
: 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( ( -- ) \ gforth
\G equivalent to assert1(
POSTPONE assert1( ; immediate
: (endassert) ( flag -- ) \ gforth-internal
\ inline argument sourcepos
if
r> sourcepos drop + >r EXIT
else
r> print-sourcepos ." : failed assertion"
true abort" assertion failed" \ !! or use a new throw code?
then ;
: ) ( -- ) \ gforth close-paren
\G end an assertion
POSTPONE (endassert) sourcepos, ; immediate
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