From 6b0dc6426f0cf1e74627f4fa92729c42c306347b Mon Sep 17 00:00:00 2001
From: Faisal Vali <faisalv@yahoo.com>
Date: Thu, 31 Oct 2013 15:58:51 +0000
Subject: [PATCH] sizeof... a parameter pack should be an unevaluated context.

- can't think of a way to test this without generic lambda captures, but will include a test once that patch is made commit-ready.

patch was ok'd by Doug.
http://llvm-reviews.chandlerc.com/D2029

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@193757 91177308-0d34-0410-b5e6-96231b3b80d8
---
 lib/Parse/ParseExpr.cpp | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/lib/Parse/ParseExpr.cpp b/lib/Parse/ParseExpr.cpp
index 8867b08e4f..e9cb827bd9 100644
--- a/lib/Parse/ParseExpr.cpp
+++ b/lib/Parse/ParseExpr.cpp
@@ -1711,6 +1711,9 @@ ExprResult Parser::ParseUnaryExprOrTypeTraitExpression() {
     if (!Name)
       return ExprError();
     
+    EnterExpressionEvaluationContext Unevaluated(Actions, Sema::Unevaluated,
+                                                 Sema::ReuseLambdaContextDecl);
+
     return Actions.ActOnSizeofParameterPackExpr(getCurScope(),
                                                 OpTok.getLocation(), 
                                                 *Name, NameLoc,
-- 
2.40.0