[#nlohmann-operator_lshift-01]
= xref:nlohmann.adoc[nlohmann]::operator<<
:relfileprefix: ../
:mrdocs:

deserialize from stream

== Synopsis

Declared in `<nlohmann/json.hpp>`

[source,cpp,subs="verbatim,replacements,macros,-callouts"]
----
[[deprecated]]
std::istream&
operator<<(
    xref:nlohmann/basic_json-00.adoc[basic_json]& j,
    std::istream& i);
----

[WARNING]
====
https://en.cppreference.com/cpp/language/attributes/deprecated[Deprecated^]: Since 3.0.0; use operator>>(std::istream&, basic_json&). Use of this entity is allowed but discouraged.
====
== Parameters

[cols="1,4"]
|===
| Name| Description
| *j*
| The left operand
| *i*
| The right operand
|===


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