Make sure Sema creates a field for 'this' captures. (Doug, please double-check that this is correct.)

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@150292 91177308-0d34-0410-b5e6-96231b3b80d8

1 files changed, 15 insertions, 1 deletions

diff --git a/lib/Sema/SemaExprCXX.cpp b/lib/Sema/SemaExprCXX.cpp
index 5a2a827230..c16d7e2282 100644
--- a/lib/Sema/SemaExprCXX.cpp
+++ b/lib/Sema/SemaExprCXX.cpp
@@ -707,8 +707,22 @@ void Sema::CheckCXXThisCapture(SourceLocation Loc, bool Explicit) {
   for (unsigned idx = FunctionScopes.size() - 1;
        NumClosures; --idx, --NumClosures) {
     CapturingScopeInfo *CSI = cast<CapturingScopeInfo>(FunctionScopes[idx]);
+    Expr *ThisExpr = 0;
+    if (LambdaScopeInfo *LSI = dyn_cast<LambdaScopeInfo>(CSI)) {
+      // For lambda expressions, build a field and an initializing expression.
+      QualType ThisTy = getCurrentThisType();
+      CXXRecordDecl *Lambda = LSI->Lambda;
+      FieldDecl *Field
+        = FieldDecl::Create(Context, Lambda, Loc, Loc, 0, ThisTy,
+                            Context.getTrivialTypeSourceInfo(ThisTy, Loc),
+                            0, false, false);
+      Field->setImplicit(true);
+      Field->setAccess(AS_private);
+      Lambda->addDecl(Field);
+      ThisExpr = new (Context) CXXThisExpr(Loc, ThisTy, /*isImplicit=*/true);
+    }
     bool isNested = NumClosures > 1;
-    CSI->AddThisCapture(isNested, Loc);
+    CSI->AddThisCapture(isNested, Loc, ThisExpr);
   }
 }