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diff --git a/include/clang/Sema/SemaLambda.h b/include/clang/Sema/SemaLambda.h
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+++ b/include/clang/Sema/SemaLambda.h
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+//===--- SemaLambda.h - Lambda Helper Functions --------------*- C++ -*-===//
+//
+//                     The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+///
+/// \file
+/// \brief This file provides some common utility functions for processing
+/// Lambdas.
+///
+//===----------------------------------------------------------------------===//
+
+#ifndef LLVM_CLANG_SEMA_LAMBDA_H
+#define LLVM_CLANG_SEMA_LAMBDA_H
+#include "clang/AST/ASTLambda.h"
+#include "clang/Sema/ScopeInfo.h"
+namespace clang {
+ 
+// Given a lambda's call operator and a variable (or null for 'this'), 
+// compute the nearest enclosing lambda that is capture-ready (i.e 
+// the enclosing context is not dependent, and all intervening lambdas can 
+// either implicitly or explicitly capture Var)
+// 
+// Return the CallOperator of the capturable lambda and set function scope 
+// index to the correct index within the function scope stack to correspond 
+// to the capturable lambda.
+// If VarDecl *VD is null, we check for 'this' capture.
+CXXMethodDecl* 
+GetInnermostEnclosingCapturableLambda( 
+    ArrayRef<sema::FunctionScopeInfo*> FunctionScopes,
+    unsigned &FunctionScopeIndex,
+    DeclContext *const CurContext, VarDecl *VD, Sema &S);
+
+} // clang
+
+#endif // LLVM_CLANG_SEMA_LAMBDA_H