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61 lines
1.6 KiB
C++
61 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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// UNSUPPORTED: c++98, c++03
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// REQUIRES: verify-support
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// Test that libc++ does not generate a warning diagnostic about the comparator
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// too early for containers of incomplete types.
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//
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// See PR41360.
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#include <set>
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#include <map>
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#include <functional>
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#include "test_macros.h"
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template <template <typename ...> class Container>
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void test_set() {
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struct KeyBase { };
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struct KeyDerived; // derives from KeyBase, but incomplete at this point
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// Name the type but don't instantiate it.
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using C = Container<KeyDerived*, std::less<KeyBase*>>;
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// Instantiate it but don't ODR use any members.
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typename C::value_type dummy; (void)dummy;
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// Complete the types.
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struct KeyDerived : KeyBase { };
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C c; // ODR use it, which should be OK
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}
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template <template <typename ...> class Container>
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void test_map() {
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struct Value { };
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struct KeyBase { };
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struct KeyDerived;
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using C = Container<KeyDerived*, Value, std::less<KeyBase*>>;
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typename C::value_type dummy; (void)dummy;
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struct KeyDerived : KeyBase { };
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C c;
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}
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int main(int, char**) {
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// expected-no-diagnostics
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test_set<std::set>();
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test_set<std::multiset>();
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test_map<std::map>();
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test_map<std::multimap>();
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return 0;
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}
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