c2df707666
There are a handful of standard library types that are intended
to support CTAD but don't need any explicit deduction guides to
do so.
This patch adds a dummy deduction guide to those types to suppress
-Wctad-maybe-unsupported (which gets emitted in user code).
This is a re-application of the original patch by Eric Fiselier in
fcd549a7d8 which had been reverted due to reasons lost at this point.
I also added the macro to a few more types. Reviving this patch was
prompted by the discussion on https://llvm.org/D133425.
Differential Revision: https://reviews.llvm.org/D133535
37 lines
943 B
C++
37 lines
943 B
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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// UNSUPPORTED: c++98, c++03, c++11, c++14
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// <string_view>
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// basic_string_view
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// Make sure that the implicitly-generated CTAD works.
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#include <string_view>
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#include "test_macros.h"
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int main(int, char**) {
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{
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char const* str = "hello world";
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std::basic_string_view sv(str);
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ASSERT_SAME_TYPE(decltype(sv), std::basic_string_view<char>);
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}
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#ifndef TEST_HAS_NO_WIDE_CHARACTERS
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{
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wchar_t const* str = L"hello world";
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std::basic_string_view sv(str);
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ASSERT_SAME_TYPE(decltype(sv), std::basic_string_view<wchar_t>);
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}
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#endif
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return 0;
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}
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