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- ////////////////////////////////////////////////////////////////////////////
- // lazy_fold_tests.cpp
- //
- // tests on foldl foldr and compose
- //
- ////////////////////////////////////////////////////////////////////////////
- /*=============================================================================
- Copyright (c) 2000-2003 Brian McNamara and Yannis Smaragdakis
- Copyright (c) 2001-2007 Joel de Guzman
- Copyright (c) 2015 John Fletcher
- Distributed under the Boost Software License, Version 1.0. (See accompanying
- file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
- ==============================================================================*/
- #include <boost/phoenix/core/limits.hpp>
- #include <boost/detail/lightweight_test.hpp>
- #include <boost/phoenix/core.hpp>
- #include <boost/phoenix/function/lazy_prelude.hpp>
- int main()
- {
- namespace phx = boost::phoenix;
- using boost::phoenix::arg_names::arg1;
- using boost::phoenix::arg_names::arg2;
- using boost::phoenix::arg_names::arg3;
- using namespace phx;
- list<int> l = enum_from(2);
- list<int> evens = filter(even,l);
- list<int> even4 = take(4,evens)();
- BOOST_TEST(foldr(plus,0,even4)() == 20);
- BOOST_TEST(foldr(multiplies,1,even4)() == 384);
- BOOST_TEST(foldr1(plus,even4)() == 20 );
- BOOST_TEST(foldl(plus,arg1,even4)(0) == 20);
- BOOST_TEST(foldl1(plus,even4)() == 20);
- BOOST_TEST(compose(inc,foldr)(plus,0,even4)() == 21);
- BOOST_TEST(compose(plus,foldl,foldr)(arg1,arg2,arg3)(plus,0,even4) == 40);
-
- return boost::report_errors();
- }
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