[#mp_units-quantity_spec-0a6-_is_non_negative_]
= xref:mp_units.adoc[mp_units]::xref:mp_units/quantity_spec-0a6.adoc[quantity_spec<QS, Args...>]::_is_non_negative_
:relfileprefix: ../../
:mrdocs:

== Synopsis

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

[source,cpp,subs="verbatim,replacements,macros,-callouts"]
----
inline constexpr static
bool _is_non_negative_ = mp_units::contains<struct non_negative, Args...>() ||
                                            (character == quantity_character::real_scalar && QS._is_non_negative_);
----


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