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// -*- C++ -*-
//===----------------------------------------------------------------------===//
//
// The LLVM Compiler Infrastructure
//
// This file is dual licensed under the MIT and the University of Illinois Open
// Source Licenses. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
// UNSUPPORTED: c++98, c++03, c++11, c++14
// XFAIL: availability=macosx10.13
// XFAIL: availability=macosx10.12
// XFAIL: availability=macosx10.11
// XFAIL: availability=macosx10.10
// XFAIL: availability=macosx10.9
// XFAIL: availability=macosx10.8
// XFAIL: availability=macosx10.7
// <variant>
// template <class ...Types> class variant;
// template <size_t I, class ...Args>
// constexpr explicit variant(in_place_index_t<I>, Args&&...);
#include <cassert>
#include <string>
#include <type_traits>
#include <variant>
#include "test_convertible.hpp"
#include "test_macros.h"
void test_ctor_sfinae() {
{
using V = std::variant<int>;
static_assert(
std::is_constructible<V, std::in_place_index_t<0>, int>::value, "");
static_assert(!test_convertible<V, std::in_place_index_t<0>, int>(), "");
}
{
using V = std::variant<int, long, long long>;
static_assert(
std::is_constructible<V, std::in_place_index_t<1>, int>::value, "");
static_assert(!test_convertible<V, std::in_place_index_t<1>, int>(), "");
}
{
using V = std::variant<int, long, int *>;
static_assert(
std::is_constructible<V, std::in_place_index_t<2>, int *>::value, "");
static_assert(!test_convertible<V, std::in_place_index_t<2>, int *>(), "");
}
{ // args not convertible to type
using V = std::variant<int, long, int *>;
static_assert(
!std::is_constructible<V, std::in_place_index_t<0>, int *>::value, "");
static_assert(!test_convertible<V, std::in_place_index_t<0>, int *>(), "");
}
{ // index not in variant
using V = std::variant<int, long, int *>;
static_assert(
!std::is_constructible<V, std::in_place_index_t<3>, int>::value, "");
static_assert(!test_convertible<V, std::in_place_index_t<3>, int>(), "");
}
}
void test_ctor_basic() {
{
constexpr std::variant<int> v(std::in_place_index<0>, 42);
static_assert(v.index() == 0, "");
static_assert(std::get<0>(v) == 42, "");
}
{
constexpr std::variant<int, long, long> v(std::in_place_index<1>, 42);
static_assert(v.index() == 1, "");
static_assert(std::get<1>(v) == 42, "");
}
{
constexpr std::variant<int, const int, long> v(std::in_place_index<1>, 42);
static_assert(v.index() == 1, "");
static_assert(std::get<1>(v) == 42, "");
}
{
using V = std::variant<const int, volatile int, int>;
int x = 42;
V v(std::in_place_index<0>, x);
assert(v.index() == 0);
assert(std::get<0>(v) == x);
}
{
using V = std::variant<const int, volatile int, int>;
int x = 42;
V v(std::in_place_index<1>, x);
assert(v.index() == 1);
assert(std::get<1>(v) == x);
}
{
using V = std::variant<const int, volatile int, int>;
int x = 42;
V v(std::in_place_index<2>, x);
assert(v.index() == 2);
assert(std::get<2>(v) == x);
}
}
int main() {
test_ctor_basic();
test_ctor_sfinae();
}
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