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** MODULE BASE-BOOL
**
**
** Copyright (c) 2000-2017, Toshimi Sawada. All rights reserved.
**
** Redistribution and use in source and binary forms, with or without
** modification, are permitted provided that the following conditions
** are met:
**
** * Redistributions of source code must retain the above copyright
** notice, this list of conditions and the following disclaimer.
**
** * Redistributions in binary form must reproduce the above
** copyright notice, this list of conditions and the following
** disclaimer in the documentation and/or other materials
** provided with the distribution.
**
** THIS SOFTWARE IS PROVIDED BY THE AUTHOR 'AS IS' AND ANY EXPRESSED
** OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
** WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
** ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY
** DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
** DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE
** GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
** INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
** WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
** NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
** SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
**
**
evq (setq *include-bool-save* *include-bool*)
require truth
set include BOOL off
sys:mod* BASE-BOOL
principal-sort Bool
{
imports {
protecting (TRUTH)
protecting (EQL)
}
signature {
op _and_ : Bool Bool -> Bool { assoc comm prec: 55 r-assoc }
op _and-also_ : Bool Bool -> Bool { strat: (1 0 2 0) prec: 55 r-assoc }
op _or_ : Bool Bool -> Bool { assoc comm prec: 59 r-assoc }
op _or-else_ : Bool Bool -> Bool { strat: (1 0 2 0) prec: 59 r-assoc }
op _xor_ : Bool Bool -> Bool { assoc comm prec: 57 r-assoc }
op not_ : Bool -> Bool { strat: (0 1) prec: 53 }
op _implies_ : Bool Bool -> Bool { strat: (0 1 2) prec: 61 r-assoc }
op _iff_ : Bool Bool -> Bool { strat: (0 1 2) prec: 63 r-assoc }
}
}
evq (setq *include-bool* *include-bool-save*)
protect BASE-BOOL
provide base_bool
--
eof
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