◆ get_impl() [6/6]

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>>

template<typename PointerType , detail::enable_if_t< std::is_pointer< PointerType >::value, int > = 0>

constexpr auto nlohmann::basic_json< ObjectType, ArrayType, StringType, BooleanType, NumberIntegerType, NumberUnsignedType, NumberFloatType, AllocatorType, JSONSerializer, BinaryType >::get_impl ( detail::priority_tag< 4 > ) const -> decltype(std::declval<const basic_json_t &>().template get_ptr<PointerType>())

inlineconstexprprivatenoexcept

get a pointer value (explicit)

Explicit pointer access to the internally stored JSON value. No copies are made.

Warning: The pointer becomes invalid if the underlying JSON object changes.

Template Parameters

PointerType pointer type; must be a pointer to array_t, object_t, string_t, boolean_t, number_integer_t, number_unsigned_t, or number_float_t.

Returns: pointer to the internally stored JSON value if the requested pointer type PointerType fits to the JSON value; nullptr otherwise

@complexity Constant.

@liveexample{The example below shows how pointers to internal values of a JSON value can be requested. Note that no type conversions are made and a nullptr is returned if the value and the requested pointer type does not match.,get__PointerType}

See also: see get_ptr() for explicit pointer-member access

Since: version 1.0.0

Definition at line 20872 of file json.hpp.

    {
        // delegate the call to get_ptr
        return get_ptr<PointerType>();
    }