File:  [gforth] / gforth / assert.fs
Revision 1.8: download - view: text, annotated - select for diffs
Tue Mar 23 20:24:16 1999 UTC (20 years, 6 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.

\ assertions

\ Copyright (C) 1995,1996,1997 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 2
\ 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, write to the Free Software
\ Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.

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

: (endassert) ( flag -- ) \ gforth-internal
    \ inline argument sourcepos
    if
	r> sourcepos %size + >r EXIT
    else
	r> print-sourcepos ." : failed assertion"
	true abort" assertion failed" \ !! or use a new throw code?
    then ;

: ) ( -- ) \ gforth	close-paren
    \G End an assertion.
    POSTPONE (endassert) sourcepos, ; immediate

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