9c4a716c12
This patch improves the preservation of qualifiers and loss of type sugar in TemplateNames. This problem is analogous to https://reviews.llvm.org/D112374 and this patch takes a very similar approach to that patch, except the impact here is much lesser. When a TemplateName was written bare, without qualifications, we wouldn't produce a QualifiedTemplate which could be used to disambiguate it from a Canonical TemplateName. This had effects in the TemplateName printer, which had workarounds to deal with this, and wouldn't print the TemplateName as-written in most situations. There are also some related fixes to help preserve this type sugar along the way into diagnostics, so that this patch can be properly tested. - Fix dropping the template keyword. - Fix type deduction to preserve sugar in TST TemplateNames.
32 lines
1.1 KiB
C++
32 lines
1.1 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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// UNSUPPORTED: c++03, c++11, c++14, c++17
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// template<class R>
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// explicit join_view(R&&) -> join_view<views::all_t<R>>;
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// Tests that the deduction guide is explicit.
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#include <ranges>
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#include "test_iterators.h"
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template<class T>
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struct Range {
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friend T* begin(Range&) { return nullptr; }
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friend T* begin(Range const&) { return nullptr; }
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friend sentinel_wrapper<T*> end(Range&) { return sentinel_wrapper<T*>(nullptr); }
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friend sentinel_wrapper<T*> end(Range const&) { return sentinel_wrapper<T*>(nullptr); }
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};
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void testExplicitCTAD() {
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Range<Range<int>> r;
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std::ranges::join_view v = r; // expected-error-re {{no viable constructor or deduction guide for deduction of template arguments of '{{(std::ranges::)?}}join_view'}}
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}
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