From 668ab3fc474e54c7919eda4fbaf11f3a99246494 Mon Sep 17 00:00:00 2001
From: Rasmus Munk Larsen <rmlarsen@google.com>
Date: Fri, 18 Oct 2019 16:42:00 -0700
Subject: Drop support for c++03 in Eigen tensor. Get rid of some code used to
 emulate c++11 functionality with older compilers.

---
 .../CXX11/src/Tensor/TensorForwardDeclarations.h   | 22 ----------------------
 1 file changed, 22 deletions(-)

(limited to 'unsupported/Eigen/CXX11/src/Tensor/TensorForwardDeclarations.h')

diff --git a/unsupported/Eigen/CXX11/src/Tensor/TensorForwardDeclarations.h b/unsupported/Eigen/CXX11/src/Tensor/TensorForwardDeclarations.h
index 802cf21d8..5549cbdb2 100644
--- a/unsupported/Eigen/CXX11/src/Tensor/TensorForwardDeclarations.h
+++ b/unsupported/Eigen/CXX11/src/Tensor/TensorForwardDeclarations.h
@@ -155,19 +155,11 @@ struct IsVectorizable<GpuDevice, Expression> {
 };
 
 // Tiled evaluation strategy.
-#if !EIGEN_HAS_CXX11
-// To be able to use `TiledEvaluation::Off` in C++03 we need a namespace.
-// (Use of enumeration in a nested name specifier is a c++11 extension).
-namespace TiledEvaluation {
-#endif
 enum TiledEvaluation {
   Off = 0,    // tiled evaluation is not supported
   On = 1,     // still work in progress (see TensorBlockV2.h)
   Legacy = 2  // soon to be deprecated (see TensorBock.h)
 };
-#if !EIGEN_HAS_CXX11
-}   // namespace TiledEvaluation
-#endif
 
 template <typename Device, typename Expression>
 struct IsTileable {
@@ -182,30 +174,16 @@ struct IsTileable {
       TensorEvaluator<Expression, Device>::BlockAccessV2 &&
       TensorEvaluator<Expression, Device>::PreferBlockAccess;
 
-#if EIGEN_HAS_CXX11
   static const TiledEvaluation value =
       BlockAccessV2
           ? TiledEvaluation::On
           : (BlockAccess ? TiledEvaluation::Legacy : TiledEvaluation::Off);
-#else
-  static const TiledEvaluation::TiledEvaluation value =
-      BlockAccessV2
-          ? TiledEvaluation::On
-          : (BlockAccess ? TiledEvaluation::Legacy : TiledEvaluation::Off);
-#endif
 };
 
-#if EIGEN_HAS_CXX11
 template <typename Expression, typename Device,
           bool Vectorizable      = IsVectorizable<Device, Expression>::value,
           TiledEvaluation Tiling = IsTileable<Device, Expression>::value>
 class TensorExecutor;
-#else
-template <typename Expression, typename Device,
-          bool Vectorizable = IsVectorizable<Device, Expression>::value,
-          TiledEvaluation::TiledEvaluation Tiling = IsTileable<Device, Expression>::value>
-class TensorExecutor;
-#endif
 
 // TODO(ezhulenev): Add TiledEvaluation support to async executor.
 template <typename Expression, typename Device, typename DoneCallback,
-- 
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