[#mp_units-utility-constrained-operator_dec-09]
= xref:mp_units.adoc[mp&lowbar;units]::xref:mp_units/utility.adoc[utility]::xref:mp_units/utility/constrained.adoc[constrained]::operator&hyphen;&hyphen;
:relfileprefix: ../../../
:mrdocs:

Decrement operator

== Synopsis

Declared in `&lt;mp&hyphen;units&sol;utility&sol;constrained&period;h&gt;`

[source,cpp,subs="verbatim,replacements,macros,-callouts"]
----
constexpr
xref:mp_units/utility/constrained.adoc[constrained&lt;decltype(std&colon;&colon;declval&lt;T&amp;&gt;()&hyphen;&hyphen;), ErrorPolicy&gt;]
operator&hyphen;&hyphen;(int);
----

== Return Value

Another instance of the object


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