Test an Expression for Con Expert Friendly Functions

Test an expression for con expert friendliness. It's effectively using spine tor out an expression that cannot be evaluated at compile time. The much more readable version of it is the a. El ernesto giero pena provides an alternative idiom using requires instead of spine nsea requires expression. If we are forcing that this function should be compiled time, then it should just be an error, right? Not just like sphenas it i think, i think so. Iit would definitely have to make a difference, right? Cause if the pragma gets if def ow, then i don't know. Would want to put the pragma first. Anyhow, ok