[llvm-commits] [llvm] r166241 - /llvm/trunk/include/llvm/ADT/Optional.h

[Jordan Rose]

Author: jrose
Date: Thu Oct 18 17:22:55 2012
New Revision: 166241

URL: http://llvm.org/viewvc/llvm-project?rev=166241&view=rev
Log:
Add a T&& constructor to llvm::Optional.

This allows llvm::Optional to be used with movable-but-not-copyable types.
While LLVM itself is still C++03, there's no reason why tools built on
top of it can't use C++11 features.

Modified:
    llvm/trunk/include/llvm/ADT/Optional.h

Modified: llvm/trunk/include/llvm/ADT/Optional.h
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/include/llvm/ADT/Optional.h?rev=166241&r1=166240&r2=166241&view=diff
==============================================================================
--- llvm/trunk/include/llvm/ADT/Optional.h (original)
+++ llvm/trunk/include/llvm/ADT/Optional.h Thu Oct 18 17:22:55 2012
@@ -16,8 +16,13 @@
 #ifndef LLVM_ADT_OPTIONAL
 #define LLVM_ADT_OPTIONAL
 
+#include "LLVM/Support/Compiler.h"
 #include <cassert>
 
+#if LLVM_USE_RVALUE_REFERENCES
+#include <utility>
+#endif
+
 namespace llvm {
 
 template<typename T>
@@ -28,6 +33,10 @@
   explicit Optional() : x(), hasVal(false) {}
   Optional(const T &y) : x(y), hasVal(true) {}
 
+#if LLVM_USE_RVALUE_REFERENCES
+  Optional(T &&y) : x(std::forward<T>(y)), hasVal(true) {}
+#endif
+
   static inline Optional create(const T* y) {
     return y ? Optional(*y) : Optional();
   }