def50f701f
fixes https://github.com/llvm/llvm-project/issues/105190 --------- Co-authored-by: Hui Xie <huixie@Mac.broadband> Co-authored-by: Hui Xie <huixie@Huis-MacBook-Pro.local>
53 lines
1.7 KiB
C++
53 lines
1.7 KiB
C++
//===----------------------------------------------------------------------===//
|
|
//
|
|
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
|
|
// See https://llvm.org/LICENSE.txt for license information.
|
|
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
|
|
//
|
|
//===----------------------------------------------------------------------===//
|
|
|
|
// UNSUPPORTED: c++03, c++11, c++14, c++17, c++20
|
|
|
|
// <flat_map>
|
|
|
|
// Test CTAD on cases where deduction should fail.
|
|
|
|
#include <flat_map>
|
|
#include <functional>
|
|
#include <memory>
|
|
#include <utility>
|
|
#include <vector>
|
|
|
|
struct NotAnAllocator {
|
|
friend bool operator<(NotAnAllocator, NotAnAllocator) { return false; }
|
|
};
|
|
|
|
using P = std::pair<int, long>;
|
|
using PC = std::pair<const int, long>;
|
|
|
|
template <class... Args>
|
|
concept CanDeductFlatMap = requires { std::flat_map{std::declval<Args>()...}; };
|
|
|
|
static_assert(CanDeductFlatMap<std::vector<int>, std::vector<int>>);
|
|
|
|
// cannot deduce Key and T from nothing
|
|
static_assert(!CanDeductFlatMap<>);
|
|
|
|
// cannot deduce Key and T from just (KeyContainer), even if it's a container of pairs
|
|
static_assert(!CanDeductFlatMap<std::vector<std::pair<int, int>>>);
|
|
|
|
// cannot deduce Key and T from just (KeyContainer, Allocator)
|
|
static_assert(!CanDeductFlatMap<std::vector<int>, std::allocator<std::pair<const int, int>>>);
|
|
|
|
// cannot deduce Key and T from just (Compare)
|
|
static_assert(!CanDeductFlatMap<std::less<int>>);
|
|
|
|
// cannot deduce Key and T from just (Compare, Allocator)
|
|
static_assert(!CanDeductFlatMap<std::less<int>, std::allocator<PC>>);
|
|
|
|
// cannot deduce Key and T from just (Allocator)
|
|
static_assert(!CanDeductFlatMap<std::allocator<PC>>);
|
|
|
|
// cannot convert from some arbitrary unrelated type
|
|
static_assert(!CanDeductFlatMap<NotAnAllocator>);
|