quantity</span><span class="special">&lt;</span><span class="identifier">Unit</span><span class="special">,</span><span class="identifier">Y</span><span class="special">&gt;</span></code>
            can be directly constructed from a value of type <code class="computeroutput"><span class="identifier">Y</span></code>
            using the static member function <span class="underline"><code class="computeroutput"><a class="link" href="../boost/units/quantity.html#id-1_3_44_10_2_36_1_1_1_18_1-bb">from_value<