CGAL 4.7 - Handles and Circulators: Circulator/circulator_prog3.cpp

\( \newcommand{\E}{\mathrm{E}} \) \( \newcommand{\A}{\mathrm{A}} \) \( \newcommand{\R}{\mathrm{R}} \) \( \newcommand{\N}{\mathrm{N}} \) \( \newcommand{\Q}{\mathrm{Q}} \) \( \newcommand{\Z}{\mathrm{Z}} \) \( \def\ccSum #1#2#3{ \sum_{#1}^{#2}{#3} } \def\ccProd #1#2#3{ \sum_{#1}^{#2}{#3} }\)

CGAL 4.7 - Handles and Circulators

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Circulator/circulator_prog3.cpp
#include <cassert>
#include <list>
#include <CGAL/circulator.h>
template <class C> inline int foo( C c, std::forward_iterator_tag) {
CGAL::Assert_circulator( c);
CGAL::Assert_forward_category( c);
return 1;
}
template <class C> inline int foo( C c, std::random_access_iterator_tag) {
CGAL::Assert_circulator( c);
CGAL::Assert_random_access_category( c);
return 2;
}
template <class I> inline int foo( I i, CGAL::Iterator_tag) {
CGAL::Assert_iterator( i);
return 3;
}
template <class C> inline int foo( C c, CGAL::Circulator_tag) {
CGAL::Assert_circulator( c);
typedef std::iterator_traits<C> Traits;
typedef typename Traits::iterator_category iterator_category;
return foo( c, iterator_category());
}
template <class IC> inline int foo( IC ic) {
typedef CGAL::Circulator_traits<IC> Traits;
typedef typename Traits::category category;
return foo( ic, category());
}
int main() {
typedef CGAL::Forward_circulator_base<int> F;
typedef CGAL::Random_access_circulator_base<int> R;
F f = F();
R r = R();
std::list<int> l;
assert( foo( f) == 1);
assert( foo( r) == 2);
assert( foo( l.begin()) == 3);
return 0;
}