127 lines
3.2 KiB
C++
127 lines
3.2 KiB
C++
// { dg-do run { target c++14 } }
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// Copyright (C) 2014-2017 Free Software Foundation, Inc.
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//
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// This file is part of the GNU ISO C++ Library. This library is free
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// software; you can redistribute it and/or modify it under the
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// terms of the GNU General Public License as published by the
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// Free Software Foundation; either version 3, or (at your option)
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// any later version.
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// This library is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU General Public License for more details.
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// You should have received a copy of the GNU General Public License along
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// with this library; see the file COPYING3. If not see
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// <http://www.gnu.org/licenses/>.
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#include <experimental/any>
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#include <string>
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#include <cstring>
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#include <testsuite_hooks.h>
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using std::experimental::any;
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using std::experimental::any_cast;
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void test01()
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{
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using std::string;
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using std::strcmp;
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// taken from example in N3804 proposal
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any x(5); // x holds int
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VERIFY(any_cast<int>(x) == 5); // cast to value
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any_cast<int&>(x) = 10; // cast to reference
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VERIFY(any_cast<int>(x) == 10);
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x = "Meow"; // x holds const char*
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VERIFY(strcmp(any_cast<const char*>(x), "Meow") == 0);
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any_cast<const char*&>(x) = "Harry";
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VERIFY(strcmp(any_cast<const char*>(x), "Harry") == 0);
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x = string("Meow"); // x holds string
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string s, s2("Jane");
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s = move(any_cast<string&>(x)); // move from any
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VERIFY(s == "Meow");
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any_cast<string&>(x) = move(s2); // move to any
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VERIFY(any_cast<const string&>(x) == "Jane");
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string cat("Meow");
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const any y(cat); // const y holds string
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VERIFY(any_cast<const string&>(y) == cat);
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}
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void test02()
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{
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using std::experimental::bad_any_cast;
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any x(1);
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auto p = any_cast<double>(&x);
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VERIFY(p == nullptr);
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x = 1.0;
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p = any_cast<double>(&x);
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VERIFY(p != nullptr);
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x = any();
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p = any_cast<double>(&x);
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VERIFY(p == nullptr);
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try {
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any_cast<double>(x);
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VERIFY(false);
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} catch (const bad_any_cast&) {
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}
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}
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static int move_count = 0;
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void test03()
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{
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struct MoveEnabled
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{
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MoveEnabled(MoveEnabled&&)
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{
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++move_count;
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}
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MoveEnabled() = default;
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MoveEnabled(const MoveEnabled&) = default;
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};
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MoveEnabled m;
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MoveEnabled m2 = any_cast<MoveEnabled>(any(m));
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VERIFY(move_count == 1);
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MoveEnabled&& m3 = any_cast<MoveEnabled&&>(any(m));
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VERIFY(move_count == 1);
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struct MoveDeleted
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{
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MoveDeleted(MoveDeleted&&) = delete;
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MoveDeleted() = default;
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MoveDeleted(const MoveDeleted&) = default;
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};
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MoveDeleted md;
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MoveDeleted&& md2 = any_cast<MoveDeleted>(any(std::move(md)));
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MoveDeleted&& md3 = any_cast<MoveDeleted&&>(any(std::move(md)));
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}
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void test04()
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{
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// PR libstdc++/69321
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struct noncopyable {
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noncopyable(noncopyable const&) = delete;
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};
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any a;
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auto p = any_cast<noncopyable>(&a);
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VERIFY( p == nullptr );
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}
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int main()
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{
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test01();
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test02();
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test03();
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test04();
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}
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