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//
// 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
//
#include <boost/container/pmr/memory_resource.hpp>
#include <boost/json/monotonic_resource.hpp>
#include <boost/json/value.hpp>
#include <vector>
#include "test_suite.hpp"
namespace boost {
namespace json {
//----------------------------------------------------------
static void set1() {
//----------------------------------------------------------
{
// tag::doc_uses_allocator_1[]
// We want to use this resource for all the containers
monotonic_resource mr;
// Declare a vector of JSON values
std::vector< value, boost::container::pmr::polymorphic_allocator< value > > v( &mr );
// The polymorphic allocator will use our resource
assert( v.get_allocator().resource() == &mr );
// Add a string to the vector
v.emplace_back( "boost" );
// The vector propagates the memory resource to the string
assert( v[0].storage().get() == &mr );
// end::doc_uses_allocator_1[]
}
//----------------------------------------------------------
{
// tag::doc_uses_allocator_2[]
// This vector will use the default memory resource
std::vector< value, boost::container::pmr::polymorphic_allocator < value > > v;
// This value will same memory resource as the vector
value jv( v.get_allocator() );
// However, ownership is not transferred,
assert( ! jv.storage().is_shared() );
// and deallocate is never null
assert( ! jv.storage().is_deallocate_trivial() );
// end::doc_uses_allocator_2[]
}
//----------------------------------------------------------
} // set1
//----------------------------------------------------------
class doc_uses_allocator_test
{
public:
void
run()
{
(void)&set1;
BOOST_TEST_PASS();
}
};
TEST_SUITE(doc_uses_allocator_test, "boost.json.doc_uses_allocator");
} // namespace json
} // namespace boost
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