File:  [gforth] / gforth / assert.fs
Revision 1.8: download - view: text, annotated - select for diffs
Tue Mar 23 20:24:16 1999 UTC (22 years, 8 months ago) by crook
Branches: MAIN
CVS tags: HEAD
Makefile.in

-- changes to make documentation build with moofglos.fs
   rather than with mini-oof.fs (since the former contains glossary
   entries and the latter does not)

assert.fs blocks.fs debug.fs environ.fs errors.fs extend.fs float.fs
glocals.fs moofglos.fs prim search.fs struct.fs stuff.fs vt100.fs
kernel/args.fs kernel/basics.fs kernel/comp.fs kernel/cond.fs
kernel/files.fs kernel/getdoers.fs kernel/int.fs kernel/io.fs
kernel/nio.fs kernel/paths.fs kernel/require.fs kernel/special.fs
kernel/tools.fs kernel/toolsext.fs kernel/vars.fs

-- many small changes to glossary entries.. I think most are done
   now, so I hope to change far fewer files next time!

doc/gforth.ds

-- many, many small changes and a few large ones. Moved some sections
   around, fixed typos and formatting errors, added new section on
   exception handling, rearranged 'files' section.

    1: \ assertions
    2: 
    3: \ Copyright (C) 1995,1996,1997 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 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
   22: 
   23: variable assert-level ( -- a-addr ) \ gforth
   24: \G All assertions above this level are turned off.
   25: 1 assert-level !
   26: 
   27: : assertn ( n -- ) \ gforth assert-n
   28:     \ this is internal (it is not immediate)
   29:     assert-level @ >
   30:     if
   31: 	POSTPONE (
   32:     then ;
   33: 
   34: : assert0( ( -- ) \ gforth assert-zero
   35:     \G Important assertions that should always be turned on.
   36:     0 assertn ; immediate
   37: : assert1( ( -- ) \ gforth assert-one
   38:     \G Normal assertions; turned on by default.
   39:     1 assertn ; immediate
   40: : assert2( ( -- ) \ gforth assert-two
   41:     \G Debugging assertions.
   42:     2 assertn ; immediate
   43: : assert3( ( -- ) \ gforth assert-three
   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.
   46:     3 assertn ; immediate
   47: : assert( ( -- ) \ gforth
   48:     \G Equivalent to @code{assert1(}
   49:     POSTPONE assert1( ; immediate
   50: 
   51: : (endassert) ( flag -- ) \ gforth-internal
   52:     \ inline argument sourcepos
   53:     if
   54: 	r> sourcepos %size + >r EXIT
   55:     else
   56: 	r> print-sourcepos ." : failed assertion"
   57: 	true abort" assertion failed" \ !! or use a new throw code?
   58:     then ;
   59: 
   60: : ) ( -- ) \ gforth	close-paren
   61:     \G End an assertion.
   62:     POSTPONE (endassert) sourcepos, ; immediate

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