| // Copyright (c) 2015, Just Software Solutions Ltd |
| // All rights reserved. |
| // |
| // Redistribution and use in source and binary forms, with or |
| // without modification, are permitted provided that the |
| // following conditions are met: |
| // |
| // 1. Redistributions of source code must retain the above |
| // copyright notice, this list of conditions and the following |
| // disclaimer. |
| // |
| // 2. Redistributions in binary form must reproduce the above |
| // copyright notice, this list of conditions and the following |
| // disclaimer in the documentation and/or other materials |
| // provided with the distribution. |
| // |
| // 3. Neither the name of the copyright holder nor the names of |
| // its contributors may be used to endorse or promote products |
| // derived from this software without specific prior written |
| // permission. |
| // |
| // THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND |
| // CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, |
| // INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF |
| // MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE |
| // DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR |
| // CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, |
| // SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT |
| // NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; |
| // LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) |
| // HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN |
| // CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR |
| // OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, |
| // EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| |
| // Copied from https://bitbucket.org/anthonyw/variant/src (5bce47fa788648f79e5ea1d77b0eef2e8f0b2999) |
| |
| // Modified to make it compile with exceptions disabled. |
| |
| #pragma once |
| |
| #include <functional> |
| #include <limits.h> |
| #include <new> |
| #include <stddef.h> |
| #include <stdexcept> |
| #include <string> |
| #include <type_traits> |
| #include <utility> |
| #include <variant> |
| #include <wtf/Compiler.h> |
| #include <wtf/StdLibExtras.h> |
| |
| namespace WTF { |
| |
| // -- WebKit Additions -- |
| |
| template<class V, class... F> |
| auto switchOn(V&& v, F&&... f) -> decltype(std::visit(makeVisitor(std::forward<F>(f)...), std::forward<V>(v))) |
| { |
| return std::visit(makeVisitor(std::forward<F>(f)...), std::forward<V>(v)); |
| } |
| |
| } // namespace WTF |
