void exercise_assignment(SU_vector& source, SU_vector& dest, double expectedVal){
try{
alloc_counting::reset_allocation_counters();
dest=std::move(source);
auto allocated=alloc_counting::mem_allocated;
std::cout << allocated/sizeof(double) << " entries allocated" << '\n';
//check the number of components
auto components=dest.GetComponents();
std::cout << components.size() << " components stored" << '\n';
//check that all components are initialized to the correct value
std::cout << "components " <<
(std::all_of(components.begin(),components.end(),[=](double c){ return(c==expectedVal); })?
"are":"are not") << " correctly set\n";
std::cout << "source dimension: " << source.Dim() << '\n';
//check that memory is not aliased
if(source.Dim()){
source[0]=5;
std::cout << "Memory aliasing: " << (dest[0]==source[0]) << '\n';
}
}catch(std::runtime_error& e){
std::cout << "Assignment failed: " << e.what() << '\n';
}
}
int main(){
using namespace squids;
const double pi=4*atan(1);
const double base_tol=2e-16; //~machine epsilon
Const transform;
for(unsigned int dim=2; dim<=SQUIDS_MAX_HILBERT_DIM; dim++){
//make sure the transformation between bases is full of non-trivial angles
for(unsigned int i=0; i<dim-1; i++){
double angle=2.*pi*(i+1.)/(dim+1.);
transform.SetMixingAngle(i,dim-1,angle);
transform.SetPhase(i,dim-1,-angle);
}
//test transformation for every generator
for(unsigned int g=0; g<(dim*dim); g++){
//get the next generator and make a copy
SU_vector s=SU_vector::Generator(dim,g);
SU_vector to=s;
// rotate s using RotateToB1
s.RotateToB1(transform);
// rotate t using gsl_unitary_rotation
auto U = transform.GetTransformationMatrix(dim);
SU_vector tr = to.Rotate(U.get());
//check that the result matches the original closely
auto sc=s.GetComponents();
auto tc=tr.GetComponents();
//as the dimension increases more operations are necessary in the
//rotation, so we allow for a slightly more error to accumulate
for(unsigned int i=0; i<(dim*dim); i++){
if(std::abs(sc[i]-tc[i])>2*dim*base_tol)
std::cout << "Dimension " << dim << " generator " << g <<
" component " << i << " has error " << (sc[i]-tc[i]) << std::endl;
}
}
}
}
void check_all_components_equal(const SU_vector& v, double expected){
const auto& components=v.GetComponents();
if(!std::all_of(components.begin(),components.end(),[=](double c){ return(c==expected); }))
std::cout << "components are not correctly set \n";
}
void check_all_components_equal(const SU_vector& v, double expected){
auto components=v.GetComponents();
std::cout << "components " <<
(std::all_of(components.begin(),components.end(),[=](double c){ return(c==expected); })?
"are":"are not") << " correctly set\n";
}