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

A named Magnitude constant identified by its symbol and, where supported, its value

== Synopsis

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

[source,cpp,subs="verbatim,replacements,macros,-callouts"]
----
template<
    xref:mp_units/symbol_text-032.adoc[symbol_text] Symbol,
    long double Value>
requires (Value > 0)
struct mag_constant;
----

== Static Data Members

[cols="1,4"]
|===
| Name| Description
| xref:mp_units/mag_constant/_symbol_.adoc[`_symbol_`] 
| The constant's textual symbol
| xref:mp_units/mag_constant/_value_.adoc[`_value_`] 
| The constant's numeric value
|===


== Derived Classes

[cols="1,4"]
|===
| Name| Description
| xref:mp_units/pi_c-0b.adoc[`pi_c`] 
| A convenient Magnitude constant for pi, which we can manipulate like a regular number.
|===


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