[#mp_units-quantity-01-operator_mod_eq]
= xref:mp_units.adoc[mp_units]::xref:mp_units/quantity-01.adoc[quantity]::operator%=
:relfileprefix: ../../
:mrdocs:

Modulus assignment operator

== Synopsis

Declared in `<mp‐units/framework/quantity.h>`

[source,cpp,subs="verbatim,replacements,macros,-callouts"]
----
template<
    auto R2,
    typename Rep2>
requires (!treat_as_floating_point<rep>) && (implicitly_convertible(get_quantity_spec(R2), quantity_spec)) &&
            detail::ValuePreservingConversion<get_unit(R2), Rep2, unit, rep> && requires(rep& a, const Rep2 b) {
              { a %= b } ‐> std::same_as<rep&>;
            }
constexpr
xref:mp_units/quantity-01.adoc[quantity]&
operator%=(xref:mp_units/quantity-01.adoc[quantity<R2, Rep2>] const& other) &;
----

== Return Value

Reference to the current object

== Parameters

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


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