Method solution

test/float/transcendental.cpp:274–278

%Test whether \a x is solution

       : Test("Transcendental::Pow::N::"+str(_base)+"::XY::Sol::"+s,2,d,st,EXTEND_ASSIGNMENT,false), base(_base) {}
       /// %Test whether \a x is solution
       virtual MaybeType solution(const Assignment& x) const {
         if (base <= 0.0)
           return MT_FALSE;
         return eq(exp(x[0] * log(base)), x[1]);
       }
       /// Extend assignment \a x
       virtual bool extendAssignment(Assignment& x) const {
         if (base <= 0.0) return false;