mirror of
https://github.com/boostorg/hana.git
synced 2026-01-31 20:22:10 +00:00
2c86ba2390
- Rename fold{l,r,l1,r1} to fold.{right,left} with overloads.
- Rename foldlM/foldrM to monadic_fold.{left,right}
- Add no-state variants of the monadic folds
- Improve the fold's documentation
- Deprecate the previous folds; they'll be removed soon
Fixes #18.
60 lines
1.4 KiB
C++
60 lines
1.4 KiB
C++
/*
|
|
@copyright Louis Dionne 2015
|
|
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/assert.hpp>
|
|
#include <boost/hana/pair.hpp>
|
|
using namespace boost::hana;
|
|
|
|
|
|
int main() {
|
|
|
|
{
|
|
|
|
//! [make<Pair>]
|
|
BOOST_HANA_CONSTEXPR_CHECK(first(make<Pair>(1, 'x')) == 1);
|
|
BOOST_HANA_CONSTEXPR_CHECK(second(make<Pair>(1, 'x')) == 'x');
|
|
//! [make<Pair>]
|
|
|
|
}{
|
|
|
|
//! [make_pair]
|
|
BOOST_HANA_CONSTEXPR_CHECK(make_pair(1, 'x') == make<Pair>(1, 'x'));
|
|
//! [make_pair]
|
|
|
|
}{
|
|
|
|
//! [comparable]
|
|
BOOST_HANA_CONSTEXPR_CHECK(make<Pair>(1, 'x') == make<Pair>(1, 'x'));
|
|
BOOST_HANA_CONSTEXPR_CHECK(make<Pair>(2, 'x') != make<Pair>(1, 'x'));
|
|
BOOST_HANA_CONSTEXPR_CHECK(make<Pair>(1, 'y') != make<Pair>(1, 'x'));
|
|
//! [comparable]
|
|
|
|
}{
|
|
|
|
//! [orderable]
|
|
BOOST_HANA_CONSTEXPR_CHECK(make<Pair>(1, 'x') < make<Pair>(1, 'y'));
|
|
BOOST_HANA_CONSTEXPR_CHECK(make<Pair>(1, 'x') < make<Pair>(10, 'x'));
|
|
BOOST_HANA_CONSTEXPR_CHECK(make<Pair>(1, 'y') < make<Pair>(10, 'x'));
|
|
//! [orderable]
|
|
|
|
}{
|
|
|
|
//! [foldable]
|
|
BOOST_HANA_CONSTEXPR_CHECK(fold.left(make<Pair>(1, 3), 0, plus) == 4);
|
|
BOOST_HANA_CONSTEXPR_CHECK(fold.right(make<Pair>(1, 3), 0, minus) == -2);
|
|
//! [foldable]
|
|
|
|
}{
|
|
|
|
//! [product]
|
|
BOOST_HANA_CONSTEXPR_CHECK(first(make<Pair>(1, 'x')) == 1);
|
|
BOOST_HANA_CONSTEXPR_CHECK(second(make<Pair>(1, 'x')) == 'x');
|
|
//! [product]
|
|
|
|
}
|
|
|
|
}
|