Quantity reference type

Synopsis

Declared in <mp‐units/framework/reference.h>

template<
    QuantitySpec Q,
    Unit U>
struct reference;

Friends

Description

Quantity reference describes all the properties of a quantity besides its representation type.

In most cases this class template is not explicitly instantiated by the user. It is implicitly instantiated by the library's framework while binding a quantity specification with a compatible unit.

{.cpp}
 Reference auto kmph = isq::speed[km / h];
 QuantityOf<isq::speed[km / h]> auto speed = 90 * kmph;

The following syntaxes are not allowed: 2 / kmph, kmph 3, `kmph / 4, 70 isq::length[km] / isq:time[h].

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