Annotation of gforth/assert.fs, revision 1.14
1.1 anton 1: \ assertions
2:
1.13 anton 3: \ Copyright (C) 1995,1996,1997,1999,2002,2003 Free Software Foundation, Inc.
1.5 anton 4:
5: \ This file is part of Gforth.
6:
7: \ Gforth is free software; you can redistribute it and/or
8: \ modify it under the terms of the GNU General Public License
1.14 ! anton 9: \ as published by the Free Software Foundation, either version 3
1.5 anton 10: \ of the License, or (at your option) any later version.
11:
12: \ This program is distributed in the hope that it will be useful,
13: \ but WITHOUT ANY WARRANTY; without even the implied warranty of
14: \ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15: \ GNU General Public License for more details.
16:
17: \ You should have received a copy of the GNU General Public License
1.14 ! anton 18: \ along with this program. If not, see http://www.gnu.org/licenses/.
1.5 anton 19:
20: require source.fs
1.1 anton 21:
1.4 anton 22: variable assert-level ( -- a-addr ) \ gforth
1.8 crook 23: \G All assertions above this level are turned off.
1.1 anton 24: 1 assert-level !
25:
1.4 anton 26: : assertn ( n -- ) \ gforth assert-n
1.2 anton 27: \ this is internal (it is not immediate)
1.1 anton 28: assert-level @ >
29: if
30: POSTPONE (
31: then ;
32:
1.4 anton 33: : assert0( ( -- ) \ gforth assert-zero
1.8 crook 34: \G Important assertions that should always be turned on.
1.1 anton 35: 0 assertn ; immediate
1.4 anton 36: : assert1( ( -- ) \ gforth assert-one
1.8 crook 37: \G Normal assertions; turned on by default.
1.1 anton 38: 1 assertn ; immediate
1.4 anton 39: : assert2( ( -- ) \ gforth assert-two
1.8 crook 40: \G Debugging assertions.
1.1 anton 41: 2 assertn ; immediate
1.4 anton 42: : assert3( ( -- ) \ gforth assert-three
1.8 crook 43: \G Slow assertions that you may not want to turn on in normal debugging;
44: \G you would turn them on mainly for thorough checking.
1.1 anton 45: 3 assertn ; immediate
1.4 anton 46: : assert( ( -- ) \ gforth
1.8 crook 47: \G Equivalent to @code{assert1(}
1.1 anton 48: POSTPONE assert1( ; immediate
49:
1.11 anton 50: : (end-assert) ( flag nfile nline -- ) \ gforth-internal
51: rot if
52: 2drop
1.1 anton 53: else
1.11 anton 54: .sourcepos ." : failed assertion"
1.1 anton 55: true abort" assertion failed" \ !! or use a new throw code?
56: then ;
57:
1.4 anton 58: : ) ( -- ) \ gforth close-paren
1.11 anton 59: \G End an assertion.
60: compile-sourcepos POSTPONE (end-assert) ; immediate
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