[#mp_units-quantity_spec-0a0-_is_non_negative_]
= xref:mp_units.adoc[mp&lowbar;units]::xref:mp_units/quantity_spec-0a0.adoc[quantity&lowbar;spec&lt;QS, Eq, Args&period;&period;&period;&gt;]::&lowbar;is&lowbar;non&lowbar;negative&lowbar;
:relfileprefix: ../../
:mrdocs:

== Synopsis

Declared in `&lt;mp&hyphen;units&sol;framework&sol;quantity&lowbar;spec&period;h&gt;`

[source,cpp,subs="verbatim,replacements,macros,-callouts"]
----
inline constexpr static
bool &lowbar;is&lowbar;non&lowbar;negative&lowbar; = mp&lowbar;units&colon;&colon;contains&lt;struct non&lowbar;negative, Args&period;&period;&period;&gt;() &verbar;&verbar;
                                            (character &equals;&equals; quantity&lowbar;character&colon;&colon;real&lowbar;scalar &amp;&amp; QS&period;&lowbar;is&lowbar;non&lowbar;negative&lowbar;);
----


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