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

69 lines
1.5 KiB
C++

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