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LWG 1118

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git-svn-id: https://llvm.org/svn/llvm-project/libcxx/trunk@119541 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Howard Hinnant
2010-11-17 19:22:43 +00:00
parent e32b5e2f23
commit 86ed8aefb2
4 changed files with 65 additions and 54 deletions
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35
test/utilities/tuple/tuple.tuple/tuple.helper/tuple_element.pass.cpp
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@@ -21,27 +21,20 @@
#include <tuple>
#include <type_traits>
template <class T, std::size_t N, class U>
void test()
{
static_assert((std::is_same<typename std::tuple_element<N, T>::type, U>::value), "");
static_assert((std::is_same<typename std::tuple_element<N, const T>::type, const U>::value), "");
static_assert((std::is_same<typename std::tuple_element<N, volatile T>::type, volatile U>::value), "");
static_assert((std::is_same<typename std::tuple_element<N, const volatile T>::type, const volatile U>::value), "");
}
int main()
{
{
typedef std::tuple<int> T;
static_assert((std::is_same<std::tuple_element<0, T>::type,
int>::value), "");
}
{
typedef std::tuple<char, int> T;
static_assert((std::is_same<std::tuple_element<0, T>::type,
char>::value), "");
static_assert((std::is_same<std::tuple_element<1, T>::type,
int>::value), "");
}
{
typedef std::tuple<int*, char, int> T;
static_assert((std::is_same<std::tuple_element<0, T>::type,
int*>::value), "");
static_assert((std::is_same<std::tuple_element<1, T>::type,
char>::value), "");
static_assert((std::is_same<std::tuple_element<2, T>::type,
int>::value), "");
}
test<std::tuple<int>, 0, int>();
test<std::tuple<char, int>, 0, char>();
test<std::tuple<char, int>, 1, int>();
test<std::tuple<int*, char, int>, 0, int*>();
test<std::tuple<int*, char, int>, 1, char>();
test<std::tuple<int*, char, int>, 2, int>();
}