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lazy corrections

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[SVN r1730]
This commit is contained in:
Jaakko Järvi
2003-11-03 20:45:20 +00:00
parent a5c7239fa9
commit 2c98ab4ac8
2 changed files with 43 additions and 33 deletions
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24
test/enable_if_lazy_test.cpp
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@@ -8,11 +8,13 @@
// Andrew Lumsdaine (lums at osl.iu.edu)
//
// Testing all variations of lazy_enable_if.
#include <boost/test/minimal.hpp>
#include <boost/mpl/not.hpp>
#include <boost/utility/enable_if.hpp>
#include <boost/type_traits/is_arithmetic.hpp>
#include <boost/type_traits/is_same.hpp>
using boost::lazy_enable_if;
using boost::lazy_disable_if;
@@ -20,22 +22,26 @@ using boost::lazy_disable_if;
using boost::lazy_enable_if_c;
using boost::lazy_disable_if_c;
using boost::is_arithmetic;
template <class T>
struct is_int_or_double {
BOOST_STATIC_CONSTANT(bool,
value = (boost::is_same<T, int>::value ||
boost::is_same<T, double>::value));
};
template <class T>
struct some_traits {
BOOST_STATIC_CONSTANT(bool, value = false);
typedef typename T::does_not_exist type;
};
template <>
struct some_traits<int> {
BOOST_STATIC_CONSTANT(bool, value = true);
typedef bool type;
};
template <>
struct some_traits<double> {
BOOST_STATIC_CONSTANT(bool, value = true);
typedef bool type;
};
@@ -53,21 +59,21 @@ struct make_bool<double> {};
namespace A {
template<class T>
typename lazy_enable_if<some_traits<T>, some_traits<T> >::type
typename lazy_enable_if<is_int_or_double<T>, some_traits<T> >::type
foo(T t) { return true; }
template<class T>
typename lazy_enable_if_c<some_traits<T>::value, some_traits<T> >::type
typename lazy_enable_if_c<is_int_or_double<T>::value, some_traits<T> >::type
foo2(T t) { return true; }
}
namespace B {
template<class T>
typename lazy_disable_if<some_traits<T>, make_bool<T> >::type
typename lazy_disable_if<is_int_or_double<T>, make_bool<T> >::type
foo(T t) { return false; }
template<class T>
typename lazy_disable_if_c<some_traits<T>::value, make_bool<T> >::type
typename lazy_disable_if_c<is_int_or_double<T>::value, make_bool<T> >::type
foo2(T t) { return false; }
}