clean up overloaded C++ assignment analysis code
clean up overloaded C++ assignment analysis code

ChristopherHogan/cython,c-blake/cython,da-woods/cython,achernet/cython,da-woods/cython,c-blake/cython,hickford/cython,JelleZijlstra/cython,hhsprings/cython,scoder/cython,achernet/cython,slonik-az/cython,JelleZijlstra/cython,c-blake/cython,slonik-az/cython,cython/cython,cython/cython,acrispin/cython,fabianrost84/cython,fperez/cython,acrispin/cython,mrGeen/cython,dahebolangkuan/cython,mrGeen/cython,scoder/cython,fabianrost84/cython,cython/cython,fperez/cython,dahebolangkuan/cython,JelleZijlstra/cython,hhsprings/cython,c-blake/cython,scoder/cython,fabianrost84/cython,ChristopherHogan/cython,JelleZijlstra/cython,roxyboy/cython,slonik-az/cython,fperez/cython,dahebolangkuan/cython,mrGeen/cython,mcanthony/cython,acrispin/cython,cython/cython,fperez/cython,mcanthony/cython,achernet/cython,hickford/cython,dahebolangkuan/cython,mcanthony/cython,c-blake/cython,acrispin/cython,roxyboy/cython,JelleZijlstra/cython,mrGeen/cython,roxyboy/cython,da-woods/cython,slonik-az/cython,fperez/cython,roxyboy/cython,madjar/cython,dahebolangkuan/cython,slonik-az/cython,madjar/cython,achernet/cython,fabianrost84/cython,hickford/cython,mcanthony/cython,achernet/cython,hickford/cython,fabianrost84/cython,ChristopherHogan/cython,hhsprings/cython,mrGeen/cython,hhsprings/cython,scoder/cython,hhsprings/cython,acrispin/cython,mcanthony/cython,madjar/cython,hickford/cython,da-woods/cython,roxyboy/cython,madjar/cython,madjar/cython