destroy()

template<template< typename U, typename V, typename... Args > class ObjectType = std::map, template< typename U, typename... Args > class ArrayType = std::vector, class StringType = std::string, class BooleanType = bool, class NumberIntegerType = std::int64_t, class NumberUnsignedType = std::uint64_t, class NumberFloatType = double, template< typename U > class AllocatorType = std::allocator, template< typename T, typename SFINAE=void > class JSONSerializer = adl_serializer, class BinaryType = std::vector<std::uint8_t>>

void nlohmann::basic_json< ObjectType, ArrayType, StringType, BooleanType, NumberIntegerType, NumberUnsignedType, NumberFloatType, AllocatorType, JSONSerializer, BinaryType >::destroy ( value_t  t )

inlineprivate

Definition at line 18815 of file json.hpp.

        {
            if (t == value_t::array || t == value_t::object)
            {
                // flatten the current json_value to a heap-allocated stack
                std::vector<basic_json> stack;
 
                // move the top-level items to stack
                if (t == value_t::array)
                {
                    stack.reserve(array->size());
                    std::move(array->begin(), array->end(), std::back_inserter(stack));
                }
 
                else
                {
                    stack.reserve(object->size());
 
                    for (auto &&it : *object)
                    {
                        stack.push_back(std::move(it.second));
                    }
                }
 
                while (!stack.empty())
                {
                    // move the last item to local variable to be processed
                    basic_json current_item(std::move(stack.back()));
                    stack.pop_back();
 
                    // if current_item is array/object, move
                    // its children to the stack to be processed later
                    if (current_item.is_array())
                    {
                        std::move(current_item.m_value.array->begin(), current_item.m_value.array->end(), std::back_inserter(stack));
                        current_item.m_value.array->clear();
                    }
 
                    else if (current_item.is_object())
                    {
                        for (auto &&it : *current_item.m_value.object)
                        {
                            stack.push_back(std::move(it.second));
                        }
 
                        current_item.m_value.object->clear();
                    }
 
                    // it's now safe that current_item get destructed
                    // since it doesn't have any children
                }
            }
 
            switch (t)
            {
                case value_t::object:
                {
                    AllocatorType<object_t> alloc;
                    std::allocator_traits<decltype(alloc)>::destroy(alloc, object);
                    std::allocator_traits<decltype(alloc)>::deallocate(alloc, object, 1);
                    break;
                }
 
                case value_t::array:
                {
                    AllocatorType<array_t> alloc;
                    std::allocator_traits<decltype(alloc)>::destroy(alloc, array);
                    std::allocator_traits<decltype(alloc)>::deallocate(alloc, array, 1);
                    break;
                }
 
                case value_t::string:
                {
                    AllocatorType<string_t> alloc;
                    std::allocator_traits<decltype(alloc)>::destroy(alloc, string);
                    std::allocator_traits<decltype(alloc)>::deallocate(alloc, string, 1);
                    break;
                }
 
                case value_t::binary:
                {
                    AllocatorType<binary_t> alloc;
                    std::allocator_traits<decltype(alloc)>::destroy(alloc, binary);
                    std::allocator_traits<decltype(alloc)>::deallocate(alloc, binary, 1);
                    break;
                }
 
                case value_t::null:
                case value_t::boolean:
                case value_t::number_integer:
                case value_t::number_unsigned:
                case value_t::number_float:
                case value_t::discarded:
                default:
                {
                    break;
                }
            }
        }