[#nlohmann-adl_serializer-from_json-06]
= xref:nlohmann.adoc[nlohmann]::xref:nlohmann/adl_serializer.adoc[adl_serializer]::from_json
:relfileprefix: ../../
:mrdocs:

convert a JSON value to any value type

== Synopsis

Declared in `<nlohmann/adl_serializer.hpp>`

[source,cpp,subs="verbatim,replacements,macros,-callouts"]
----
template<
    typename BasicJsonType,
    typename TargetType = ValueType>
static
decltype(::nlohmann::from_json(std::forward<BasicJsonType>(j), val), void())
from_json(
    BasicJsonType&& j,
    TargetType& val) noexcept(/* see-below */);
----

== Exception specification

This function is potentially-throwing unless `noexcept(::nlohmann::from_json(std::forward<BasicJsonType>(j), val))`.

== Return Value

nothing; the result is written to _val_

== Parameters

[cols="1,4"]
|===
| Name| Description
| *j*
| JSON value to read from
| *val*
| value to write the converted result to
|===


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