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Diffstat (limited to 'include/llvm/ADT/None.h')
| -rw-r--r-- | include/llvm/ADT/None.h | 27 |
1 files changed, 27 insertions, 0 deletions
diff --git a/include/llvm/ADT/None.h b/include/llvm/ADT/None.h new file mode 100644 index 0000000000..83c952178a --- /dev/null +++ b/include/llvm/ADT/None.h @@ -0,0 +1,27 @@ +//===-- None.h - Simple null value for implicit construction ------*- C++ -*-=// +// +// The LLVM Compiler Infrastructure +// +// This file is distributed under the University of Illinois Open Source +// License. See LICENSE.TXT for details. +// +//===----------------------------------------------------------------------===// +// +// This file provides None, an enumerant 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 { +/// \brief A simple null object to allow implicit construction of Optional<T> +/// and similar types without having to spell out the specialization's name. +enum NoneType { + None +}; +} + +#endif |