gcc/libstdc++-v3/testsuite/23_containers/multimap/cons/deduction.cc

69 lines
2.0 KiB
C++

// { dg-options "-std=gnu++17" }
// { dg-do compile { target c++17 } }
#include <map>
#include <testsuite_allocator.h>
using __gnu_test::SimpleAllocator;
static_assert(std::is_same_v<
decltype(std::multimap{std::pair{1, 2.0}, {2, 3.0}, {3, 4.0}}),
std::multimap<int, double>>);
static_assert(std::is_same_v<
decltype(std::multimap{{std::pair{1, 2.0}, {2, 3.0}, {3, 4.0}}}),
std::multimap<int, double>>);
static_assert(std::is_same_v<
decltype(std::multimap{{std::pair{1, 2.0}, {2, 3.0}, {3, 4.0}},
std::less<int>{}, {}}),
std::multimap<int, double>>);
static_assert(std::is_same_v<
decltype(std::multimap{{std::pair{1, 2.0}, {2, 3.0}, {3, 4.0}},
{}}),
std::multimap<int, double>>);
static_assert(std::is_same_v<
decltype(std::multimap{{std::pair{1, 2.0}, {2, 3.0}, {3, 4.0}},
{}, SimpleAllocator<std::pair<const int, double>>{}}),
std::multimap<int, double, std::less<int>,
SimpleAllocator<std::pair<const int, double>>>>);
void f()
{
std::multimap<int, double> x;
static_assert(std::is_same_v<
decltype(std::multimap(x.begin(), x.end())),
std::multimap<int, double>>);
static_assert(std::is_same_v<
decltype(std::multimap{x.begin(), x.end(),
std::less<int>{},
std::allocator<std::pair<const int, double>>{}}),
std::multimap<int, double>>);
static_assert(std::is_same_v<
decltype(std::multimap{x.begin(), x.end(),
std::less<int>{}, {}}),
std::multimap<int, double>>);
static_assert(std::is_same_v<
decltype(std::multimap(x.begin(), x.end(),
{})),
std::multimap<int, double>>);
static_assert(std::is_same_v<
decltype(std::multimap{x.begin(), x.end(),
{},
std::allocator<std::pair<const int, double>>{}}),
std::multimap<int, double>>);
static_assert(std::is_same_v<
decltype(std::multimap{x.begin(), x.end(),
{},
SimpleAllocator<std::pair<const int, double>>{}}),
std::multimap<int, double, std::less<int>,
SimpleAllocator<std::pair<const int, double>>>>);
}