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Make tuple's constructor and std::get<>(tuple) constexpr. Final stage of fixing bug #16599. Thanks to Howard for the review and updates.

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git-svn-id: https://llvm.org/svn/llvm-project/libcxx/trunk@186834 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Marshall Clow
2013-07-22 16:02:19 +00:00
parent 8fc4f5a251
commit da0a0e8a1b
13 changed files with 263 additions and 56 deletions
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25
test/utilities/tuple/tuple.tuple/tuple.elem/get_non_const.pass.cpp
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@@ -19,6 +19,20 @@
#include <string>
#include <cassert>
#if __cplusplus > 201103L
struct Empty {};
struct S {
std::tuple<int, Empty> a;
int k;
Empty e;
constexpr S() : a{1,Empty{}}, k(std::get<0>(a)), e(std::get<1>(a)) {}
};
constexpr std::tuple<int, int> getP () { return { 3, 4 }; }
#endif
int main()
{
{
@@ -53,4 +67,15 @@ int main()
assert(std::get<2>(t) == 4);
assert(d == 2.5);
}
#if _LIBCPP_STD_VER > 11
{ // get on an rvalue tuple
static_assert ( std::get<0> ( std::make_tuple ( 0.0f, 1, 2.0, 3L )) == 0, "" );
static_assert ( std::get<1> ( std::make_tuple ( 0.0f, 1, 2.0, 3L )) == 1, "" );
static_assert ( std::get<2> ( std::make_tuple ( 0.0f, 1, 2.0, 3L )) == 2, "" );
static_assert ( std::get<3> ( std::make_tuple ( 0.0f, 1, 2.0, 3L )) == 3, "" );
static_assert(S().k == 1, "");
static_assert(std::get<1>(getP()) == 4, "");
}
#endif
}