Fix -Wunused-value to not warn on expressions that have unresolved lookups due

to dependent arguments.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@166468 91177308-0d34-0410-b5e6-96231b3b80d8

1 files changed, 5 insertions, 0 deletions

diff --git a/lib/AST/Expr.cpp b/lib/AST/Expr.cpp
index 694325af22..3c8cbb56a0 100644
--- a/lib/AST/Expr.cpp
+++ b/lib/AST/Expr.cpp
@@ -1950,6 +1950,11 @@ bool Expr::isUnusedResultAWarning(const Expr *&WarnE, SourceLocation &Loc,
     return false;
   }
 
+  // If we don't know precisely what we're looking at, let's not warn.
+  case UnresolvedLookupExprClass:
+  case CXXUnresolvedConstructExprClass:
+    return false;
+
   case CXXTemporaryObjectExprClass:
   case CXXConstructExprClass:
     return false;