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128 lines
3.0 KiB
C++
128 lines
3.0 KiB
C++
// Copyright (C) 2002-2003 Doug Gregor (gregod@cs.rpi.edu)
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//
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// Permission to copy, use, sell and distribute this software is granted
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// provided this copyright notice appears in all copies.
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// Permission to modify the code and to distribute modified code is granted
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// provided this copyright notice appears in all copies, and a notice
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// that the code was modified is included with the copyright notice.
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//
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// This software is provided "as is" without express or implied warranty,
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// and with no claim as to its suitability for any purpose.
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// For more information, see http://www.boost.org
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#include <boost/tribool.hpp>
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#include <cassert>
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#include <iostream>
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int main()
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{
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using namespace boost;
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tribool x; // false
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tribool y(true); // true
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tribool z(indeterminate); // indeterminate
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assert(!x);
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assert(x == false);
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assert(false == x);
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assert(x != true);
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assert(true != x);
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assert(indeterminate(x == indeterminate));
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assert(indeterminate(indeterminate == x));
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assert(indeterminate(x != indeterminate));
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assert(indeterminate(indeterminate != x));
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assert(x == x);
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assert(!(x != x));
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assert(!(x && true));
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assert(!(true && x));
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assert(x || true);
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assert(true || x);
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assert(y);
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assert(y == true);
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assert(true == y);
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assert(y != false);
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assert(false != y);
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assert(indeterminate(y == indeterminate));
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assert(indeterminate(indeterminate == y));
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assert(indeterminate(y != indeterminate));
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assert(indeterminate(indeterminate != y));
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assert(y == y);
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assert(!(y != y));
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assert(indeterminate(z || !z));
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assert(indeterminate(z == true));
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assert(indeterminate(true == z));
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assert(indeterminate(z == false));
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assert(indeterminate(false == z));
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assert(indeterminate(z == indeterminate));
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assert(indeterminate(indeterminate == z));
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assert(indeterminate(z != indeterminate));
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assert(indeterminate(indeterminate != z));
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assert(indeterminate(z == z));
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assert(indeterminate(z != z));
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assert(!(x == y));
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assert(x != y);
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assert(indeterminate(x == z));
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assert(indeterminate(x != z));
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assert(indeterminate(y == z));
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assert(indeterminate(y != z));
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assert(!(x && y));
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assert(x || y);
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assert(!(x && z));
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assert(indeterminate(y && z));
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assert(indeterminate(z && z));
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assert(indeterminate(z || z));
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assert(indeterminate(x || z));
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assert(y || z);
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assert(indeterminate(y && indeterminate));
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assert(indeterminate(indeterminate && y));
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assert(!(x && indeterminate));
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assert(!(indeterminate && x));
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assert(indeterminate || y);
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assert(y || indeterminate);
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assert(indeterminate(x || indeterminate));
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assert(indeterminate(indeterminate || x));
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// Test the if (z) ... else (!z) ... else ... idiom
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if (z) {
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assert(false);
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}
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else if (!z) {
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assert(false);
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}
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else {
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assert(true);
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}
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z = true;
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if (z) {
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assert(true);
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}
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else if (!z) {
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assert(false);
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}
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else {
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assert(false);
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}
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z = false;
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if (z) {
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assert(false);
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}
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else if (!z) {
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assert(true);
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}
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else {
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assert(false);
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}
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std::cout << "no errors detected\n";
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return 0;
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}
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