sysrap/tests/squadUnionTest.cc

0001
0002 /**
0003
0004 name=squadUnionTest ; gcc $name.cc -std=c++11 -lstdc++ -I.. -I/usr/local/cuda/include -o /tmp/$name && /tmp/$name
0005
0006 https://stackoverflow.com/questions/252552/why-do-we-need-c-unions
0007
0008 **/
0009
0010 #include "scuda.h"
0011 #include "squad.h"
0012
0013 union qstate2
0014 {
0015     struct
0016     {
0017         float m1_refractive_index ;
0018         float m1_absorption_length ;
0019         float m1_scattering_length ;
0020         float m1_reemission_prob ;
0021
0022         float m2_refractive_index ;
0023         float m2_absorption_length ;
0024         float m2_scattering_length ;
0025         float m2_reemission_prob ;
0026
0027     } field ;
0028
0029     quad2 q ;
0030 };
0031
0032
0033
0034 #include <iostream>
0035
0036 int main()
0037 {
0038     qstate2 s ;
0039     s.q.zero();
0040
0041     s.field.m1_refractive_index = 1.f ;
0042     s.field.m2_refractive_index = 1.5f ;
0043
0044     std::cout << "s.q.q0.f " << s.q.q0.f << std::endl ;
0045     std::cout << "s.q.q1.f " << s.q.q1.f << std::endl ;
0046
0047
0048     return 0 ;
0049 }
0050