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307d3d0ec8
- Split type class instances into separate files - Instances provided automatically by a type class are actually MCDs - Test each instance in a single file, not one file per method - Refactor the operator system to fix the ADL-related bug.
28 lines
617 B
C++
28 lines
617 B
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/tuple.hpp>
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#include <cassert>
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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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//! [main]
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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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assert(foldr(tuple(1, "2", '3'), "4", show) == "(1 + (2 + (3 + 4)))");
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//! [main]
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}
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