[#mp_units-unit_vector]
= xref:mp_units.adoc[mp_units]::unit_vector
:relfileprefix: ../
:mrdocs:

== Synopsis

Declared in `<mp‐units/cartesian_vector.h>`

[source,cpp,subs="verbatim,replacements,macros,-callouts"]
----
[[nodiscard]]
constexpr
xref:mp_units/cartesian_vector-08.adoc[cartesian_vector]
unit_vector(xref:mp_units/cartesian_vector-08.adoc[cartesian_vector] const& vec)
requires treat_as_floating_point<T>;
----


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