Logical: add not_

test/logical/default_instance.cpp

@@ -0,0 +1,37 @@
+/*
+@copyright Louis Dionne 2014
+Distributed under the Boost Software License, Version 1.0.
+(See accompanying file LICENSE.md or copy at http://boost.org/LICENSE_1_0.txt)
+ */
+
+#include <boost/hana/logical.hpp>
+
+#include <boost/hana/detail/constexpr.hpp>
+
+#include <cassert>
+using namespace boost::hana;
+
+
+BOOST_HANA_CONSTEXPR_LAMBDA auto test = [](auto true_, auto false_) {
+    assert(eval_if(true_,
+        [=](auto) { return true_; },
+        [](auto id) { return 1 / id(0); }
+    ) == true_);
+    assert(eval_if(false_,
+        [](auto id) { return 1 / id(0); },
+        [=](auto) { return false_; }
+    ) == false_);
+
+    assert(if_(true_, true_, false_) == true_);
+    assert(if_(false_, true_, false_) == false_);
+
+    assert(not_(not_(true_)));
+    assert(not_(false_));
+};
+
+int main() {
+    test(true, false);
+    test(1, 0);
+    test(2ll, 0ll);
+    test(2, false);
+}