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
diff --git a/lib/Support/LockFileManager.cpp b/lib/Support/LockFileManager.cpp
index 31eec75..92d8b83 100644
--- a/lib/Support/LockFileManager.cpp
+++ b/lib/Support/LockFileManager.cpp
@@ -31,7 +31,7 @@
// to read, so we just return.
bool Exists = false;
if (sys::fs::exists(LockFileName, Exists) || !Exists)
- return Optional<std::pair<std::string, int> >();
+ return None;
// Read the owning host and PID out of the lock file. If it appears that the
// owning process is dead, the lock file is invalid.
@@ -45,7 +45,7 @@
// Delete the lock file. It's invalid anyway.
bool Existed;
sys::fs::remove(LockFileName, Existed);
- return Optional<std::pair<std::string, int> >();
+ return None;
}
bool LockFileManager::processStillExecuting(StringRef Hostname, int PID) {