[#mp_units-quantity_point-08-quantity_from-08]
= xref:mp_units.adoc[mp_units]::xref:mp_units/quantity_point-08.adoc[quantity_point]::quantity_from
:relfileprefix: ../../
:mrdocs:

Returns the quantity separating this quantity point from a given point origin.

== Synopsis

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

[source,cpp,subs="verbatim,replacements,macros,-callouts"]
----
template<xref:mp_units/PointOrigin.adoc[PointOrigin] PO2>
requires requires(const quantity_point qp) { qp ‐ PO2{}; }
[[nodiscard]]
constexpr
xref:mp_units/Quantity-0c.adoc[Quantity] auto
quantity_from(PO2 po) const;
----

== Return Value

The result of `*this ‐ po`.

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

[cols="1,4"]
|===
| Name| Description
| *po*
| the point origin to measure the offset from
|===


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