[#mp_units-vector_axes-axis]
= xref:mp_units.adoc[mp&lowbar;units]::xref:mp_units/vector_axes.adoc[vector&lowbar;axes]::axis
:relfileprefix: ../../
:mrdocs:

== Synopsis

Declared in `&lt;mp&hyphen;units&sol;framework&sol;vector&lowbar;components&period;h&gt;`

[source,cpp,subs="verbatim,replacements,macros,-callouts"]
----
template&lt;std::size&lowbar;t Idx&gt;
inline constexpr static
xref:mp_units/QuantitySpec.adoc[QuantitySpec] auto axis = detail&colon;&colon;nth&lowbar;value&lt;Idx, Axes&period;&period;&period;&gt;();
----


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