mirror of
https://github.com/boostorg/hana.git
synced 2026-02-01 20:42:13 +00:00
28 lines
697 B
C++
28 lines
697 B
C++
/*
|
|
@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/detail/assert.hpp>
|
|
#include <boost/hana/tuple.hpp>
|
|
|
|
#include <sstream>
|
|
#include <string>
|
|
using namespace boost::hana;
|
|
|
|
|
|
int main() {
|
|
//! [foldl]
|
|
auto to_string = [](auto x) {
|
|
return static_cast<std::ostringstream const&>(std::ostringstream{} << x).str();
|
|
};
|
|
|
|
auto show = [=](auto x, auto y) {
|
|
return "(" + to_string(x) + " + " + to_string(y) + ")";
|
|
};
|
|
|
|
BOOST_HANA_RUNTIME_ASSERT(foldl(tuple(2, "3", '4'), "1", show) == "(((1 + 2) + 3) + 4)");
|
|
//! [foldl]
|
|
}
|