1: \ nesting.fs displays nesting for primitive trace 12jun97jaw
2:
3: \ Copyright (C) 1998,2000,2003,2007 Free Software Foundation, Inc.
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 3
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, see http://www.gnu.org/licenses/.
19:
20: Variable nestlevel
21:
22: : main
23: cr
24: 0 nestlevel !
25: BEGIN
26: key dup 9 u> WHILE
27: dup
28: CASE ': OF cr nestlevel @ spaces 1 nestlevel +! emit ENDOF
29: '; OF cr -1 nestlevel +! nestlevel @ spaces emit
30: cr nestlevel @ spaces ENDOF
31: dup OF dup 31 u> IF emit THEN ENDOF
32: ENDCASE
33: REPEAT drop bye ;
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