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87f3ff3e55
- add the `from_range_t` constructors and the related deduction guides; - add the `push_range` member function. (Note: this patch is split from https://reviews.llvm.org/D142335) Reviewed By: #libc, ldionne Differential Revision: https://reviews.llvm.org/D149829
33 lines
1.1 KiB
C++
33 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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#ifndef SUPPORT_UNWRAP_CONTAINER_ADAPTOR_H
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#define SUPPORT_UNWRAP_CONTAINER_ADAPTOR_H
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// Allows accessing the underlying container of the given adaptor.
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template <class Adaptor>
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struct UnwrapAdaptor : Adaptor {
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UnwrapAdaptor() = default;
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UnwrapAdaptor(Adaptor&& adaptor) : Adaptor(std::move(adaptor)) {}
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// `c` is a protected member variable of the base class.
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decltype(auto) get_container() {
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return (UnwrapAdaptor::c); // Put into parentheses to make sure the function returns a reference.
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}
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// TODO: make this work pre-C++20.
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decltype(auto) get_comparator()
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requires requires {
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UnwrapAdaptor::c;
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} {
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return (UnwrapAdaptor::comp); // Put into parentheses to make sure the function returns a reference.
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}
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};
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#endif // SUPPORT_UNWRAP_CONTAINER_ADAPTOR_H
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