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+//===--- Lambda.h - Types for C++ Lambdas -----------------------*- C++ -*-===//
+//
+// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
+// See https://llvm.org/LICENSE.txt for license information.
+// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
+//
+//===----------------------------------------------------------------------===//
+///
+/// \file
+/// Defines several types used to describe C++ lambda expressions
+/// that are shared between the parser and AST.
+///
+//===----------------------------------------------------------------------===//
+
+
+#ifndef LLVM_CLANG_BASIC_LAMBDA_H
+#define LLVM_CLANG_BASIC_LAMBDA_H
+
+namespace clang {
+
+/// The default, if any, capture method for a lambda expression.
+enum LambdaCaptureDefault {
+  LCD_None,
+  LCD_ByCopy,
+  LCD_ByRef
+};
+
+/// The different capture forms in a lambda introducer
+///
+/// C++11 allows capture of \c this, or of local variables by copy or
+/// by reference.  C++1y also allows "init-capture", where the initializer
+/// is an expression.
+enum LambdaCaptureKind {
+  LCK_This,   ///< Capturing the \c *this object by reference
+  LCK_StarThis, /// < Capturing the \c *this object by copy
+  LCK_ByCopy, ///< Capturing by copy (a.k.a., by value)
+  LCK_ByRef,  ///< Capturing by reference
+  LCK_VLAType ///< Capturing variable-length array type
+};
+
+} // end namespace clang
+
+#endif // LLVM_CLANG_BASIC_LAMBDA_H