Merging r228792:

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r228792 | rsmith | 2015-02-10 18:41:33 -0800 (Tue, 10 Feb 2015) | 5 lines

Add a warning for direct-list-initialization of a variable with a deduced type
(or of a lambda init-capture, which is sort-of such a variable). The semantics
of such constructs will change when we implement N3922, so we intend to warn on
this in Clang 3.6 then change the semantics in Clang 3.7.

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git-svn-id: https://llvm.org/svn/llvm-project/cfe/branches/release_36@228799 91177308-0d34-0410-b5e6-96231b3b80d8

1 files changed, 8 insertions, 0 deletions

diff --git a/lib/Sema/SemaDecl.cpp b/lib/Sema/SemaDecl.cpp
index b556f18b76..c6af2edee5 100644
--- a/lib/Sema/SemaDecl.cpp
+++ b/lib/Sema/SemaDecl.cpp
@@ -8702,6 +8702,14 @@ void Sema::AddInitializerToDecl(Decl *RealDecl, Expr *Init,
     CheckVariableDeclarationType(VDecl);
     if (VDecl->isInvalidDecl())
       return;
+
+    // If all looks well, warn if this is a case that will change meaning when
+    // we implement N3922.
+    if (DirectInit && !CXXDirectInit && isa<InitListExpr>(Init)) {
+      Diag(Init->getLocStart(),
+           diag::warn_auto_var_direct_list_init)
+        << FixItHint::CreateInsertion(Init->getLocStart(), "=");
+    }
   }
 
   // dllimport cannot be used on variable definitions.