[#mp_units-quantity-01-2conversion-0d]
= xref:mp_units.adoc[mp_units]::xref:mp_units/quantity-01.adoc[quantity]::operator Q_
:relfileprefix: ../../
:mrdocs:

Conversion to `Q_`

== Synopsis

Declared in `<mp‐units/framework/quantity.h>`

[source,cpp,subs="verbatim,replacements,macros,-callouts"]
----
template<
    typename Q_,
    xref:mp_units/QuantityLike.adoc[QuantityLike] Q = std::remove_cvref_t<Q_>>
requires detail::QuantityConstructibleFrom<detail::quantity_like_type<Q>, quantity>
[[nodiscard]]
constexpr
explicit(quantity_like_traits<Q>::explicit_export || !std::convertible_to<quantity<R, Rep>, detail::quantity_like_type<Q>>)
operator Q_() const noexcept(noexcept(quantity_like_traits<Q>::from_numerical_value(this‐>numerical_value_is_an_implementation_detail_)) && std::is_nothrow_copy_constructible_v<rep>);
----

== Return Value

The object converted to `Q_`


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