Constructs a quantity from a numerical value and a reference with a different unit.

Synopsis

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

template<
    typename FwdValue,
    Reference R2>
requires (!equivalent(unit, get_unit(R2{}))) &&
            detail::QuantityConstructibleFrom<quantity, quantity<R2{}, std::remove_cvref_t<FwdValue>>>
[[nodiscard]]
constexpr
quantity(
    FwdValue&& val,
    R2 ref);

Description

The value is first converted to the quantity of reference ref and then scaled to this quantity's unit.

Return Value

Note

The return value should not be discarded.

Parameters

Name

Description

val

the numerical value to store, expressed in the unit of ref

ref

a reference whose unit is not equivalent to unit

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