mp_units::named_constant<Symbol, U, RSU>

Specialization for a measured constant declaring its relative standard uncertainty

Synopsis

Declared in <mp-units/framework/unit_definitions.h>

template<symbol_text Symbol, Unit auto U, typename M, relative_standard_uncertainty<M> RSU>
  requires(!Symbol.empty()) && detail::magnitude_is_positive<M{}>
struct named_constant<Symbol, U, RSU> : ::_base_type_

Description

The same as the above but additionally stores the relative standard uncertainty of a constant that is measured rather than exact by definition. The value transcribes the entry published in the source metrology table (e.g., CODATA).

Base Classes

Name	Description
::_base_type_

Template Parameters

Name	Description
Symbol	a short text representation of the constant
Unit	a unit that we use to define a constant
RSU	the relative standard uncertainty of the measured value