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add helper functions tuple_size and tuple_element for CGAL::cpp0x:tuple 

This is defined in cpp0x and tr1 but not in boost: in case  boost::tuple
is used, it relies on internal boost struct.
This commit is contained in:
Sébastien Loriot 2010-06-14 16:24:10 +00:00
parent 34813708ac
commit 54b0fbc99a
2 changed files with 33 additions and 0 deletions
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13
STL_Extension/include/CGAL/tuple.h
View File

@ -42,16 +42,29 @@ using std::tuple;
using std::make_tuple;
using std::tie;
using std::get;
using std::tuple_size;
using std::tuple_element;
#elif !defined CGAL_CFG_NO_TR1_TUPLE
using std::tr1::tuple;
using std::tr1::make_tuple;
using std::tr1::tie;
using std::tr1::get;
using std::tr1::tuple_size;
using std::tr1::tuple_element;
#else
using boost::tuple;
using boost::make_tuple;
using boost::tie;
using boost::get;
//tuple_size
template <class T>
struct tuple_size:public boost::tuples::length<T> {};
//tuple_element
template <int N,class T>
struct tuple_element: public boost::tuples::element<N,T>{};
#endif
} // cpp0x

20
STL_Extension/test/STL_Extension/test_stl_extension.cpp
View File

@ -44,6 +44,7 @@
#include <CGAL/Circulator_project.h>
#include <CGAL/Circulator_on_node.h>
#include <CGAL/function_objects.h>
#include <CGAL/tuple.h>
using namespace CGAL;
@ -8987,6 +8988,24 @@ void test_Quadruple()
if (x2 == y2) x4.third = x3;
}
void test_tuple(){
typedef CGAL::cpp0x::tuple<> T0;
typedef CGAL::cpp0x::tuple<int,int> T1;
typedef CGAL::cpp0x::tuple<int,My_to_int,int,int> T2;
BOOST_STATIC_ASSERT( CGAL::cpp0x::tuple_size<T0>::value == 0 );
BOOST_STATIC_ASSERT( CGAL::cpp0x::tuple_size<T1>::value == 2 );
BOOST_STATIC_ASSERT( CGAL::cpp0x::tuple_size<T2>::value == 4 );
BOOST_STATIC_ASSERT( (boost::is_same<CGAL::cpp0x::tuple_element<1,T2>::type,My_to_int>::value) );
T1 t1=CGAL::cpp0x::make_tuple(1,2);
int i1=-1,i2=-1;
CGAL::cpp0x::tie(i1,i2)=t1;
CGAL_assertion( CGAL::cpp0x::get<0>(t1)==i1 );
CGAL_assertion( CGAL::cpp0x::get<1>(t1)==i2 );
}
void test_predecessor_successor()
{
std::vector<int> V;
@ -9018,6 +9037,7 @@ int main() {
test_Quadruple();
test_predecessor_successor();
clean_global_data();
test_tuple();
return 0;
}
// EOF //