[llvm] 90cfbb8 - Add LLVM_VALUE_FUNCTION to Optional::map(); NFC

[Aaron Ballman via llvm-commits]

Author: Aaron Ballman
Date: 2020-01-22T14:21:08-05:00
New Revision: 90cfbb81674ecd38030e2656acaed4f3c39b5e62

URL: https://github.com/llvm/llvm-project/commit/90cfbb81674ecd38030e2656acaed4f3c39b5e62
DIFF: https://github.com/llvm/llvm-project/commit/90cfbb81674ecd38030e2656acaed4f3c39b5e62.diff

LOG: Add LLVM_VALUE_FUNCTION to Optional::map(); NFC

This is for future-proofing when compiling with MSVC once we drop support for 2017.

Added: 
    

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

Removed: 
    


################################################################################
diff  --git a/llvm/include/llvm/ADT/Optional.h b/llvm/include/llvm/ADT/Optional.h
index c84f9aa8b342..c64b82352397 100644
--- a/llvm/include/llvm/ADT/Optional.h
+++ b/llvm/include/llvm/ADT/Optional.h
@@ -269,7 +269,7 @@ template <typename T> class Optional {
 
   /// Apply a function to the value if present; otherwise return None.
   template <class Function>
-  auto map(const Function &F) const
+  auto map(const Function &F) const LLVM_LVALUE_FUNCTION
       -> Optional<decltype(F(getValue()))> {
     if (*this) return F(getValue());
     return None;