79 lines
1.6 KiB
C++
79 lines
1.6 KiB
C++
// Copyright (c) 2017
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// Mikhail Maximov
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//
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// Distributed under the Boost Software License, Version 1.0. (See
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// accompanying file LICENSE_1_0.txt or copy at
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// http://www.boost.org/LICENSE_1_0.txt)
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#include "boost/config.hpp"
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#include "boost/core/lightweight_test.hpp"
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#ifdef __cpp_inheriting_constructors
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// Test is based on reported issue:
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// https://svn.boost.org/trac/boost/ticket/12680
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// GCC 6 crashed, trying to determine is boost::recursive_wrapper<Node>
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// is_noexcept_move_constructible
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#include <string>
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#include <iterator>
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#include <boost/variant.hpp>
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#include <boost/array.hpp>
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struct Leaf { };
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struct Node;
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typedef boost::variant<Leaf, boost::recursive_wrapper<Node>> TreeBase;
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struct Tree : TreeBase {
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using TreeBase::TreeBase;
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template <typename Iter>
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static Tree Create(Iter /*first*/, Iter /*last*/) { return Leaf{}; }
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};
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struct Node {
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Tree left, right;
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};
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// Test from https://svn.boost.org/trac/boost/ticket/7120
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template<class Node>
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struct node1_type;
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struct var_type;
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using var_base = boost::variant<int,
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boost::recursive_wrapper<node1_type<var_type>>
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>;
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template<class Node>
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struct node1_type {
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boost::array<Node, 1> children;
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};
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struct var_type : var_base {
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using var_base::var_base;
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};
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void run() {
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std::string input{"abracadabra"};
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const Tree root = Tree::Create(input.begin(), input.end());
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(void)root; // prevents unused variable warning
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var_type v1 = 1;
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(void)v1;
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}
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#else // #!ifdef __cpp_inheriting_constructors
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// if compiler does not support inheriting constructors - does nothing
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void run() {}
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#endif
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int main()
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{
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run();
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return boost::report_errors();
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}
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