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| Rev | Author | Line No. | Line |
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| 14 | pmbaty | 1 | //===-- None.h - Simple null value for implicit construction ------*- C++ -*-=// |
| 2 | // |
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| 3 | // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. |
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| 4 | // See https://llvm.org/LICENSE.txt for license information. |
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| 5 | // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception |
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| 6 | // |
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| 7 | //===----------------------------------------------------------------------===// |
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| 8 | /// |
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| 9 | /// \file |
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| 10 | /// This file provides None, an enumerator for use in implicit constructors |
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| 11 | /// of various (usually templated) types to make such construction more |
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| 12 | /// terse. |
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| 13 | /// |
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| 14 | //===----------------------------------------------------------------------===// |
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| 15 | |||
| 16 | #ifndef LLVM_ADT_NONE_H |
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| 17 | #define LLVM_ADT_NONE_H |
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| 18 | |||
| 19 | #include "llvm/Support/Compiler.h" |
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| 20 | #include <optional> |
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| 21 | |||
| 22 | namespace llvm { |
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| 23 | /// A simple null object to allow implicit construction of std::optional<T> |
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| 24 | /// and similar types without having to spell out the specialization's name. |
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| 25 | LLVM_DEPRECATED("Use std::nullopt_t instead", "std::nullopt_t") |
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| 26 | typedef std::nullopt_t NoneType; |
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| 27 | LLVM_DEPRECATED("Use std::nullopt instead.", "std::nullopt") |
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| 28 | inline constexpr std::nullopt_t None = std::nullopt; |
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| 29 | } |
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| 30 | |||
| 31 | #endif |