f72b3e1c07
Adds explanation why `is_constructible` evaluates to false. This reapplies as-is e476f968bc8e438a0435d10934f148de570db8eb. This was reverted in 16d5db71b3c38f21aa17783a8758f947dca5883f because of a test failure in libc++. The test failure in libc++ is interesting in that, in the absence of nested diagnostics a bunch of diagnostics are emitted as error instead of notes, which we cannot silence with `-verify-ignore-unexpected`. The fix here is to prevent the diagnostics to be emitted in the first place. However this is clearly not ideal and we should make sure to deploy a better solution in the clang 22 time frame, in the lines of https://discourse.llvm.org/t/rfc-add-a-new-text-diagnostics-format-that-supports-nested-diagnostics/87641/12 Fixes #150601 --------- Co-authored-by: Shamshura Egor <164661612+egorshamshura@users.noreply.github.com>
44 lines
1.6 KiB
C++
44 lines
1.6 KiB
C++
//===----------------------------------------------------------------------===//
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//
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// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
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// See https://llvm.org/LICENSE.txt for license information.
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// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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//
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//===----------------------------------------------------------------------===//
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// <array>
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// UNSUPPORTED: c++03, c++11, c++14, c++17
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#include <array>
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#include "test_macros.h"
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#include "MoveOnly.h"
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// expected-warning@array:* 0-1 {{suggest braces around initialization of subobject}}
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int main(int, char**) {
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{
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char source[3][6] = {"hi", "world"};
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// expected-error@array:* {{to_array does not accept multidimensional arrays}}
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// expected-error@array:* {{to_array requires copy constructible elements}}
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// expected-error@array:* 3 {{cannot initialize}}
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std::to_array(source); // expected-note {{requested here}}
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}
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{
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MoveOnly mo[] = {MoveOnly{3}};
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// expected-error@array:* {{to_array requires copy constructible elements}}
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// expected-error-re@array:* 1-2{{{{(call to implicitly-deleted copy constructor of 'MoveOnly')|(call to deleted constructor of 'MoveOnly')}}}}
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std::to_array(mo); // expected-note {{requested here}}
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}
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{
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const MoveOnly cmo[] = {MoveOnly{3}};
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// expected-error@array:* {{to_array requires move constructible elements}}
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// expected-error-re@array:* 0-1{{{{(call to implicitly-deleted copy constructor of 'MoveOnly')|(call to deleted constructor of 'MoveOnly')}}}}
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std::to_array(std::move(cmo)); // expected-note {{requested here}}
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}
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return 0;
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}
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