[#mp_units-QuantitySpec]
= xref:mp_units.adoc[mp_units]::QuantitySpec
:relfileprefix: ../
:mrdocs:

== Synopsis

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

[source,cpp,subs="verbatim,replacements,macros,-callouts"]
----
template<typename T>
concept QuantitySpec = std::derived_from<T, detail::quantity_spec_interface_base> && detail::SymbolicConstant<T>;
----


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