[#mp_units-quantity_point-08-2constructor-07c]
= xref:mp_units.adoc[mp_units]::xref:mp_units/quantity_point-08.adoc[quantity_point]::quantity_point
:relfileprefix: ../../
:mrdocs:

Constructs a quantity point from an external quantity‐point‐like type via `quantity_point_like_traits`.

== Synopsis

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

[source,cpp,subs="verbatim,replacements,macros,-callouts"]
----
template<xref:mp_units/QuantityPointLike.adoc[QuantityPointLike] QP>
requires (quantity_point_like_traits<QP>::point_origin == point_origin) &&
            std::constructible_from<quantity_type, quantity<quantity_point_like_traits<QP>::reference,
                                                            typename quantity_point_like_traits<QP>::rep>>
[[nodiscard]]
constexpr
explicit(quantity_point_like_traits<QP>::explicit_import || !std::convertible_to<quantity<quantity_point_like_traits<QP>::reference, typename quantity_point_like_traits<QP>::rep>, quantity_type>)
quantity_point(QP const& qp);
----

== Return Value

[NOTE]
====
The return value https://en.cppreference.com/cpp/language/attributes/nodiscard[should not be discarded^].
====
== Parameters

[cols="1,4"]
|===
| Name| Description
| *qp*
| the source value, adapted through `quantity_point_like_traits<QP>`
|===


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