[Sema] Replace mem_fn with lambdas. NFC.

I'm told that some optimizers like lambdas a lot more than mem_fn.
Given that the readability difference is basically nil, and we seem to
use lambdas basically everywhere else, it seems sensible to just use
lambdas.

llvm-svn: 276577

1 files changed, 5 insertions, 3 deletions

diff --git a/clang/lib/Sema/SemaLambda.cpp b/clang/lib/Sema/SemaLambda.cpp
index 1b8410d7f4b..472637ba800 100644
--- a/clang/lib/Sema/SemaLambda.cpp
+++ b/clang/lib/Sema/SemaLambda.cpp
@@ -1144,14 +1144,16 @@ void Sema::ActOnLambdaError(SourceLocation StartLoc, Scope *CurScope,
 
 /// \brief Add a lambda's conversion to function pointer, as described in
 /// C++11 [expr.prim.lambda]p6.
-static void addFunctionPointerConversion(Sema &S, 
+static void addFunctionPointerConversion(Sema &S,
                                          SourceRange IntroducerRange,
                                          CXXRecordDecl *Class,
                                          CXXMethodDecl *CallOperator) {
   // This conversion is explicitly disabled if the lambda's function has
   // pass_object_size attributes on any of its parameters.
-  if (llvm::any_of(CallOperator->parameters(),
-                   std::mem_fn(&ParmVarDecl::hasAttr<PassObjectSizeAttr>)))
+  auto HasPassObjectSizeAttr = [](const ParmVarDecl *P) {
+    return P->hasAttr<PassObjectSizeAttr>();
+  };
+  if (llvm::any_of(CallOperator->parameters(), HasPassObjectSizeAttr))
     return;
 
   // Add the conversion to function pointer.