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| author | David Blaikie <dblaikie@gmail.com> | 2013-02-21 00:27:28 +0000 |
|---|---|---|
| committer | David Blaikie <dblaikie@gmail.com> | 2013-02-21 00:27:28 +0000 |
| commit | 5c43245bf459c77077b607e1b55e6928cfbe464e (patch) | |
| tree | 82fed71a9b20a0c1b252d28969f293179656996c /include/llvm/ADT/Optional.h | |
| parent | 06ab2c828a5605abec36eb0d6749940fa6eb7391 (diff) | |
| download | external_llvm-5c43245bf459c77077b607e1b55e6928cfbe464e.zip external_llvm-5c43245bf459c77077b607e1b55e6928cfbe464e.tar.gz external_llvm-5c43245bf459c77077b607e1b55e6928cfbe464e.tar.bz2 | |
Provide a "None" value for convenience when using Optional<T>()
This implementation of NoneType/None does have some holes but I haven't
found one that doesn't - open to improvement.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@175696 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'include/llvm/ADT/Optional.h')
| -rw-r--r-- | include/llvm/ADT/Optional.h | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/include/llvm/ADT/Optional.h b/include/llvm/ADT/Optional.h index 6c91a13..b0d09f6 100644 --- a/include/llvm/ADT/Optional.h +++ b/include/llvm/ADT/Optional.h @@ -16,6 +16,7 @@ #ifndef LLVM_ADT_OPTIONAL_H #define LLVM_ADT_OPTIONAL_H +#include "llvm/ADT/None.h" #include "llvm/Support/Compiler.h" #include "llvm/Support/AlignOf.h" #include <cassert> @@ -31,6 +32,7 @@ class Optional { AlignedCharArrayUnion<T> storage; bool hasVal; public: + Optional(NoneType) : hasVal(false) {} explicit Optional() : hasVal(false) {} Optional(const T &y) : hasVal(true) { new (storage.buffer) T(y); |