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118 lines
2.8 KiB
C++
118 lines
2.8 KiB
C++
/*
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@copyright Louis Dionne 2014
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Distributed under the Boost Software License, Version 1.0.
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(See accompanying file LICENSE.md or copy at http://boost.org/LICENSE_1_0.txt)
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*/
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#include <boost/hana/detail/assert.hpp>
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#include <boost/hana/foreign.hpp>
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#include <boost/hana/integer_list.hpp>
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#include <boost/hana/integral.hpp>
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#include <boost/hana/maybe.hpp>
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#include <boost/hana/range.hpp>
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#include <boost/hana/tuple.hpp>
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#include <sstream>
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#include <string>
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using namespace boost::hana;
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int main() {
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{
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//! [foldl1]
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auto to_string = [](auto x) {
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return (std::ostringstream{} << x).str();
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};
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auto show = [=](auto x, auto y) {
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return "(" + to_string(x) + " + " + to_string(y) + ")";
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};
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BOOST_HANA_RUNTIME_ASSERT(foldl1(tuple(1, "2", '3'), show) == "((1 + 2) + 3)");
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//! [foldl1]
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}
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{
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//! [foldl]
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auto to_string = [](auto x) {
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return (std::ostringstream{} << x).str();
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};
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auto show = [=](auto x, auto y) {
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return "(" + to_string(x) + " + " + to_string(y) + ")";
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};
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BOOST_HANA_RUNTIME_ASSERT(foldl(tuple(2, "3", '4'), "1", show) == "(((1 + 2) + 3) + 4)");
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//! [foldl]
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}
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{
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//! [foldr]
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auto to_string = [](auto x) {
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return (std::ostringstream{} << x).str();
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};
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auto show = [=](auto x, auto y) {
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return "(" + to_string(x) + " + " + to_string(y) + ")";
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};
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BOOST_HANA_RUNTIME_ASSERT(foldr(tuple(1, "2", '3'), "4", show) == "(1 + (2 + (3 + 4)))");
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//! [foldr]
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}
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{
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//! [foldr1]
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auto to_string = [](auto x) {
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return (std::ostringstream{} << x).str();
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};
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auto show = [=](auto x, auto y) {
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return "(" + to_string(x) + " + " + to_string(y) + ")";
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};
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BOOST_HANA_RUNTIME_ASSERT(foldr1(tuple(1, "2", '3'), show) == "(1 + (2 + 3))");
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//! [foldr1]
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}
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//! [length]
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BOOST_HANA_CONSTANT_ASSERT(length(tuple()) == int_<0>);
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BOOST_HANA_CONSTANT_ASSERT(length(tuple(1, '2', 3.0)) == int_<3>);
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BOOST_HANA_CONSTANT_ASSERT(length(nothing) == int_<0>);
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BOOST_HANA_CONSTANT_ASSERT(length(just('x')) == int_<1>);
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//! [length]
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//! [maximum]
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BOOST_HANA_CONSTANT_ASSERT(
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maximum(integer_list<int, -1, 0, 2, -4, 6, 9>) == int_<9>
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);
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//! [maximum]
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//! [minimum]
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BOOST_HANA_CONSTANT_ASSERT(
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minimum(integer_list<int, -1, 0, 2, -4, 6, 9>) == int_<-4>
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);
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//! [minimum]
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//! [product]
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BOOST_HANA_CONSTANT_ASSERT(
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product(range(int_<1>, int_<6>)) == int_<1 * 2 * 3 * 4 * 5>
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);
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BOOST_HANA_CONSTEXPR_ASSERT(
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product(tuple(1, int_<3>, long_<-5>, 9)) == 1 * 3 * -5 * 9
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);
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//! [product]
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//! [sum]
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BOOST_HANA_CONSTANT_ASSERT(
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sum(range(int_<1>, int_<6>)) == int_<1 + 2 + 3 + 4 + 5>
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);
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BOOST_HANA_CONSTEXPR_ASSERT(
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sum(tuple(1, int_<3>, long_<-5>, 9)) == 1 + 3 - 5 + 9
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);
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//! [sum]
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}
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