68 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 <utility>19#include <tuple>20 21using P = std::pair<int, long>;22using PC = std::pair<const int, long>;23 24void test() {25 {26 // cannot deduce that the inner braced things should be std::pair and not something else27 std::flat_map m{{1, 1L}, {2, 2L}, {3, 3L}};28 // expected-error-re@-1{{{{no viable constructor or deduction guide for deduction of template arguments of '.*flat_map'}}}}29 }30 {31 // cannot deduce that the inner braced things should be std::pair and not something else32 std::flat_map m({{1, 1L}, {2, 2L}, {3, 3L}}, std::less<int>());33 // expected-error-re@-1{{{{no viable constructor or deduction guide for deduction of template arguments of '.*flat_map'}}}}34 }35 {36 // cannot deduce that the inner braced things should be std::pair and not something else37 std::flat_map m({{1, 1L}, {2, 2L}, {3, 3L}}, std::less<int>(), std::allocator<PC>());38 // expected-error-re@-1{{{{no viable constructor or deduction guide for deduction of template arguments of '.*flat_map'}}}}39 }40 {41 // cannot deduce that the inner braced things should be std::pair and not something else42 std::flat_map m({{1, 1L}, {2, 2L}, {3, 3L}}, std::allocator<PC>());43 // expected-error-re@-1{{{{no viable constructor or deduction guide for deduction of template arguments of '.*flat_map'}}}}44 }45 {46 // since we have parens, not braces, this deliberately does not find the initializer_list constructor47 std::flat_map m(P{1, 1L});48 // expected-error-re@-1{{{{no viable constructor or deduction guide for deduction of template arguments of '.*flat_map'}}}}49 }50 {51 // since we have parens, not braces, this deliberately does not find the initializer_list constructor52 std::flat_map m(PC{1, 1L});53 // expected-error-re@-1{{{{no viable constructor or deduction guide for deduction of template arguments of '.*flat_map'}}}}54 }55 {56 // cannot deduce from tuple-like objects without proper iterator57 std::tuple<int, double> t{1, 2.0};58 std::flat_map m(t);59 // expected-error-re@-1{{no viable constructor or deduction guide for deduction of template arguments of '{{(std::)?}}flat_map'}}60 }61 {62 // cannot deduce from array-like objects without proper iterator63 std::array<int, 2> arr{1, 2};64 std::flat_map m(arr);65 // expected-error-re@-1{{no viable constructor or deduction guide for deduction of template arguments of '{{(std::)?}}flat_map'}}66 }67}68