//===-- None.h - Simple null value for implicit construction ------*- C++ -*-=// // // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. // See https://llvm.org/LICENSE.txt for license information. // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception // //===----------------------------------------------------------------------===// // // This file provides None, an enumerator for use in implicit constructors // of various (usually templated) types to make such construction more // terse. // //===----------------------------------------------------------------------===// #ifndef LLVM_ADT_NONE_H #define LLVM_ADT_NONE_H namespace llvm { /// A simple null object to allow implicit construction of Optional /// and similar types without having to spell out the specialization's name. // (constant value 1 in an attempt to workaround MSVC build issue... ) enum class NoneType { None = 1 }; const NoneType None = NoneType::None; } #endif