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Variadic templates are cool...

This commit is contained in:
Sylvain Pion 2006-10-24 03:20:03 +00:00
parent 1d629e2b1e
commit 232264bed8
1 changed files with 55 additions and 1 deletions
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56
Filtered_kernel/include/CGAL/Filtered_predicate.h
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@ -47,6 +47,10 @@ CGAL_BEGIN_NAMESPACE
// not, or we let all this up to the compiler optimizer to figure out ?
// - Some caching should be done at the Point_2 level.
#ifdef __VARIADIC_TEMPLATES
# define CGAL_HAS_VARIADIC_TEMPLATES
#endif
template <class EP, class AP, class C2E, class C2A, bool Protection = true>
class Filtered_predicate
@ -85,6 +89,30 @@ public:
: ep(c2e(o1), c2e(o2)), ap(c2a(o1), c2a(o2))
{}
#ifdef CGAL_HAS_VARIADIC_TEMPLATES
template <typename... Args>
result_type
operator()(const Args&... args) const
#ifndef CGAL_CFG_OUTOFLINE_TEMPLATE_MEMBER_DEFINITION_BUG
;
#else
{
try
{
CGAL_PROFILER(std::string("calls to : ") + std::string(CGAL_PRETTY_FUNCTION));
Protect_FPU_rounding<Protection> P;
Ares res = ap(c2a(args)...);
if (! is_indeterminate(res))
return res;
}
catch (Interval_nt_advanced::unsafe_comparison) {}
CGAL_PROFILER(std::string("failures of : ") + std::string(CGAL_PRETTY_FUNCTION));
Protect_FPU_rounding<!Protection> P(CGAL_FE_TONEAREST);
return ep(c2e(args)...);
}
#endif
#else
template <class A1>
result_type
operator()(const A1 &a1) const
@ -323,10 +351,34 @@ public:
c2e(a5), c2e(a6), c2e(a7), c2e(a8), c2e(a9), c2e(a10) );
}
#endif
// Idem for more than 10 arguments. Do it on demand.
#endif
};
#ifdef CGAL_HAS_VARIADIC_TEMPLATES
template <class EP, class AP, class C2E, class C2A, bool Protection>
template <typename... Args>
typename Filtered_predicate<EP,AP,C2E,C2A,Protection>::result_type
Filtered_predicate<EP,AP,C2E,C2A,Protection>::
operator()(const Args&... args) const
{
try
{
CGAL_PROFILER(std::string("calls to : ") + std::string(CGAL_PRETTY_FUNCTION));
Protect_FPU_rounding<Protection> P;
Ares res = ap(c2a(args)...);
if (! is_indeterminate(res))
return res;
}
catch (Interval_nt_advanced::unsafe_comparison) {}
CGAL_PROFILER(std::string("failures of : ") + std::string(CGAL_PRETTY_FUNCTION));
Protect_FPU_rounding<!Protection> P(CGAL_FE_TONEAREST);
return ep(c2e(args)...);
}
#else
#ifndef CGAL_CFG_OUTOFLINE_TEMPLATE_MEMBER_DEFINITION_BUG
template <class EP, class AP, class C2E, class C2A, bool Protection>
template <class A1>
@ -549,6 +601,8 @@ Filtered_predicate<EP,AP,C2E,C2A,Protection>::
#endif
#endif
CGAL_END_NAMESPACE
#endif // CGAL_FILTERED_PREDICATE_H