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\ assertions
\ Copyright (C) 1995,1996,1997,1999,2002,2003,2007 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 3
\ 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, see http://www.gnu.org/licenses/.
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 @code{assert1(}
POSTPONE assert1( ; immediate
: (end-assert) ( flag nfile nline -- ) \ gforth-internal
rot if
2drop
else
.sourcepos ." : failed assertion"
true abort" assertion failed" \ !! or use a new throw code?
then ;
: ) ( -- ) \ gforth close-paren
\G End an assertion.
compile-sourcepos POSTPONE (end-assert) ; immediate
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