le="font-size: 11px;"><span style="font-family: Menlo;"><br/></span></span></div>
<div><span style="font-size: 11px;"><span style="font-family: Menlo;">If you want your literal operators to be constexpr for user-defined types, the constructor of the user-defined type must be constexpr and also all other requirements for constexpr must be satisfied ();</span></span></div>
<div><span style="font-size: 11px;"><span style="font-family: Menlo;"><br/></span></span></div>
<div><span style="font-size: 11px;"><span 