[#mp_units-operator_minus-05]
= xref:mp_units.adoc[mp_units]::operator‐
:relfileprefix: ../
:mrdocs:

== Synopsis

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

[source,cpp,subs="verbatim,replacements,macros,-callouts"]
----
template<
    std::derived_from<quantity_point> QP,
    xref:mp_units/ReferenceOf.adoc[ReferenceOf<PO._quantity_spec_>] auto R2,
    typename Rep2>
[[nodiscard]]
constexpr
xref:mp_units/QuantityPoint.adoc[QuantityPoint] auto
operator‐(
    QP const& qp,
    xref:mp_units/quantity-01.adoc[quantity<R2, Rep2>] const& q)
requires requires { qp.quantity_ref_from(PO) ‐ q; };
----


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