Annotation of gforth/assert.fs, revision 1.9
1.1 anton 1: \ assertions
2:
1.9 ! anton 3: \ Copyright (C) 1995,1996,1997,1999 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
9: \ as published by the Free Software Foundation; either version 2
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
18: \ along with this program; if not, write to the Free Software
19: \ Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
20:
21: require source.fs
1.1 anton 22:
1.4 anton 23: variable assert-level ( -- a-addr ) \ gforth
1.8 crook 24: \G All assertions above this level are turned off.
1.1 anton 25: 1 assert-level !
26:
1.4 anton 27: : assertn ( n -- ) \ gforth assert-n
1.2 anton 28: \ this is internal (it is not immediate)
1.1 anton 29: assert-level @ >
30: if
31: POSTPONE (
32: then ;
33:
1.4 anton 34: : assert0( ( -- ) \ gforth assert-zero
1.8 crook 35: \G Important assertions that should always be turned on.
1.1 anton 36: 0 assertn ; immediate
1.4 anton 37: : assert1( ( -- ) \ gforth assert-one
1.8 crook 38: \G Normal assertions; turned on by default.
1.1 anton 39: 1 assertn ; immediate
1.4 anton 40: : assert2( ( -- ) \ gforth assert-two
1.8 crook 41: \G Debugging assertions.
1.1 anton 42: 2 assertn ; immediate
1.4 anton 43: : assert3( ( -- ) \ gforth assert-three
1.8 crook 44: \G Slow assertions that you may not want to turn on in normal debugging;
45: \G you would turn them on mainly for thorough checking.
1.1 anton 46: 3 assertn ; immediate
1.4 anton 47: : assert( ( -- ) \ gforth
1.8 crook 48: \G Equivalent to @code{assert1(}
1.1 anton 49: POSTPONE assert1( ; immediate
50:
1.4 anton 51: : (endassert) ( flag -- ) \ gforth-internal
1.5 anton 52: \ inline argument sourcepos
1.1 anton 53: if
1.6 anton 54: r> sourcepos %size + >r EXIT
1.1 anton 55: else
1.5 anton 56: r> print-sourcepos ." : failed assertion"
1.1 anton 57: true abort" assertion failed" \ !! or use a new throw code?
58: then ;
59:
1.4 anton 60: : ) ( -- ) \ gforth close-paren
1.8 crook 61: \G End an assertion.
1.5 anton 62: POSTPONE (endassert) sourcepos, ; immediate
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