Added thirdparty: boost library

thirdparty/include/boost/json/impl/null_resource.ipp

@@ -0,0 +1,90 @@
+//
+// Copyright (c) 2019 Vinnie Falco (vinnie.falco@gmail.com)
+//
+// Distributed under the Boost Software License, Version 1.0. (See accompanying
+// file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
+//
+// Official repository: https://github.com/boostorg/json
+//
+
+#ifndef BOOST_JSON_IMPL_NULL_RESOURCE_IPP
+#define BOOST_JSON_IMPL_NULL_RESOURCE_IPP
+
+#include <boost/json/null_resource.hpp>
+#include <boost/throw_exception.hpp>
+
+namespace boost {
+namespace json {
+
+namespace detail {
+
+/** A resource which always fails.
+
+    This memory resource always throws the exception
+    `std::bad_alloc` in calls to `allocate`.
+*/
+class null_resource final
+    : public memory_resource
+{
+public:
+    /// Copy constructor (deleted)
+    null_resource(
+        null_resource const&) = delete;
+
+    /// Copy assignment (deleted)
+    null_resource& operator=(
+        null_resource const&) = delete;
+
+    /** Constructor
+
+        This constructs the resource.
+
+        @par Complexity
+        Constant.
+
+        @par Exception Safety
+        No-throw guarantee.
+    */
+    /** @{ */
+    null_resource() noexcept = default;
+
+protected:
+    void*
+    do_allocate(
+        std::size_t,
+        std::size_t) override
+    {
+        throw_exception( std::bad_alloc(), BOOST_CURRENT_LOCATION );
+    }
+
+    void
+    do_deallocate(
+        void*,
+        std::size_t,
+        std::size_t) override
+    {
+        // do nothing
+    }
+
+    bool
+    do_is_equal(
+        memory_resource const& mr
+            ) const noexcept override
+    {
+        return this == &mr;
+    }
+};
+
+} // detail
+
+memory_resource*
+get_null_resource() noexcept
+{
+    static detail::null_resource mr;
+    return &mr;
+}
+
+} // namespace json
+} // namespace boost
+
+#endif