[#mp_units-utility-constrained-2constructor-074e]
= xref:mp_units.adoc[mp_units]::xref:mp_units/utility.adoc[utility]::xref:mp_units/utility/constrained.adoc[constrained]::constrained
:relfileprefix: ../../../
:mrdocs:

Default constructor

== Synopsis

Declared in `<mp‐units/utility/constrained.h>`

[source,cpp,subs="verbatim,replacements,macros,-callouts"]
----
[[nodiscard]]
constrained() = default;
----

== Return Value

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

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