LLVM  6.0.0svn
None.h
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1 //===-- None.h - Simple null value for implicit construction ------*- C++ -*-=//
2 //
3 // The LLVM Compiler Infrastructure
4 //
5 // This file is distributed under the University of Illinois Open Source
6 // License. See LICENSE.TXT for details.
7 //
8 //===----------------------------------------------------------------------===//
9 //
10 // This file provides None, an enumerator for use in implicit constructors
11 // of various (usually templated) types to make such construction more
12 // terse.
13 //
14 //===----------------------------------------------------------------------===//
15 
16 #ifndef LLVM_ADT_NONE_H
17 #define LLVM_ADT_NONE_H
18 
19 namespace llvm {
20 /// \brief A simple null object to allow implicit construction of Optional<T>
21 /// and similar types without having to spell out the specialization's name.
22 // (constant value 1 in an attempt to workaround MSVC build issue... )
23 enum class NoneType { None = 1 };
25 }
26 
27 #endif
Compute iterated dominance frontiers using a linear time algorithm.
Definition: AllocatorList.h:24
NoneType
A simple null object to allow implicit construction of Optional<T> and similar types without having t...
Definition: None.h:23