Skip to content

# nlohmann::adl_serializer::from_json

    // (1)
    template<typename BasicJsonType, typename TargetType = ValueType>
    static auto from_json(BasicJsonType && j, TargetType& val) noexcept(
        noexcept(::nlohmann::from_json(std::forward<BasicJsonType>(j), val)))
    -> decltype(::nlohmann::from_json(std::forward<BasicJsonType>(j), val), void())

    // (2)
    template<typename BasicJsonType, typename TargetType = ValueType>
    static auto from_json(BasicJsonType && j) noexcept(
    noexcept(::nlohmann::from_json(std::forward<BasicJsonType>(j), detail::identity_tag<TargetType> {})))
    -> decltype(::nlohmann::from_json(std::forward<BasicJsonType>(j), detail::identity_tag<TargetType> {}))

This function is usually called by the `get()` function of the basic_json class (either explicit or via conversion operators).

1. This function is chosen for default-constructible value types.
2. This function is chosen for value types which are not default-constructible.

## Parameters

`j` (in)
  JSON value to read from
`val` (out)
  value to write to

## Return value

Copy of the JSON value, converted to `ValueType`

Note

This documentation page is a stub.

## Version history

- Added in version 2.1.0.

Last update: May 1, 2022
Back to top