[#mp_units-cartesian_vector-08-operator_minus_eq]
= xref:mp_units.adoc[mp_units]::xref:mp_units/cartesian_vector-08.adoc[cartesian_vector]::operator‐=
:relfileprefix: ../../
:mrdocs:

Subtraction assignment operator

== Synopsis

Declared in `<mp‐units/cartesian_vector.h>`

[source,cpp,subs="verbatim,replacements,macros,-callouts"]
----
template<typename U>
requires requires(T t, U u) {
      { t ‐= u } ‐> std::same_as<T&>;
    }
constexpr
xref:mp_units/cartesian_vector-08.adoc[cartesian_vector]&
operator‐=(xref:mp_units/cartesian_vector-08.adoc[cartesian_vector<U>] const& other);
----

== Return Value

Reference to the current object

== Parameters

[cols=2]
|===
| Name
| Description
| *other*
| The right operand
|===


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