72 lines · cpp
1//===----------------------------------------------------------------------===//2//3// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.4// See https://llvm.org/LICENSE.txt for license information.5// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception6//7//===----------------------------------------------------------------------===//8 9// UNSUPPORTED: c++03, c++11, c++14, c++17, c++2010 11// <flat_map>12 13// Test CTAD on cases where deduction should fail.14 15#include <array>16#include <flat_map>17#include <functional>18#include <tuple>19#include <utility>20 21struct NotAnAllocator {22 friend bool operator<(NotAnAllocator, NotAnAllocator) { return false; }23};24 25using P = std::pair<int, long>;26using PC = std::pair<const int, long>;27 28void test() {29 {30 // cannot deduce that the inner braced things should be std::pair and not something else31 std::flat_multimap m{{1, 1L}, {2, 2L}, {3, 3L}};32 // expected-error-re@-1{{{{no viable constructor or deduction guide for deduction of template arguments of '.*flat_multimap'}}}}33 }34 {35 // cannot deduce that the inner braced things should be std::pair and not something else36 std::flat_multimap m({{1, 1L}, {2, 2L}, {3, 3L}}, std::less<int>());37 // expected-error-re@-1{{{{no viable constructor or deduction guide for deduction of template arguments of '.*flat_multimap'}}}}38 }39 {40 // cannot deduce that the inner braced things should be std::pair and not something else41 std::flat_multimap m({{1, 1L}, {2, 2L}, {3, 3L}}, std::less<int>(), std::allocator<PC>());42 // expected-error-re@-1{{{{no viable constructor or deduction guide for deduction of template arguments of '.*flat_multimap'}}}}43 }44 {45 // cannot deduce that the inner braced things should be std::pair and not something else46 std::flat_multimap m({{1, 1L}, {2, 2L}, {3, 3L}}, std::allocator<PC>());47 // expected-error-re@-1{{{{no viable constructor or deduction guide for deduction of template arguments of '.*flat_multimap'}}}}48 }49 {50 // since we have parens, not braces, this deliberately does not find the initializer_list constructor51 std::flat_multimap m(P{1, 1L});52 // expected-error-re@-1{{{{no viable constructor or deduction guide for deduction of template arguments of '.*flat_multimap'}}}}53 }54 {55 // since we have parens, not braces, this deliberately does not find the initializer_list constructor56 std::flat_multimap m(PC{1, 1L});57 // expected-error-re@-1{{{{no viable constructor or deduction guide for deduction of template arguments of '.*flat_multimap'}}}}58 }59 {60 // cannot deduce from tuple-like objects without proper iterator61 std::tuple<int, double> t{1, 2.0};62 std::flat_multimap m(t);63 // expected-error-re@-1{{no viable constructor or deduction guide for deduction of template arguments of '{{(std::)?}}flat_multimap'}}64 }65 {66 // cannot deduce from array-like objects without proper iterator67 std::array<int, 2> arr{1, 2};68 std::flat_multimap m(arr);69 // expected-error-re@-1{{no viable constructor or deduction guide for deduction of template arguments of '{{(std::)?}}flat_multimap'}}70 }71}72