[#mp_units-utility-operator_minus-04]
= xref:mp_units.adoc[mp_units]::xref:mp_units/utility.adoc[utility]::operator‐
:relfileprefix: ../../
:mrdocs:

== Synopsis

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

[source,cpp,subs="verbatim,replacements,macros,-callouts"]
----
[[nodiscard]]
constexpr
auto
operator‐(
    xref:mp_units/utility/safe_int-07.adoc[safe_int] lhs,
    U rhs)
requires requires { static_cast<U>(lhs.value_) ‐ rhs; };
----

== Return Value

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

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