From c2671e53158ed36776bd4003473d525c98a58afa Mon Sep 17 00:00:00 2001
From: Christoph Hertzberg <chtz@informatik.uni-bremen.de>
Date: Fri, 12 Jul 2019 19:43:32 +0200
Subject: [PATCH] Build deprecated snippets with -DEIGEN_NO_DEPRECATED_WARNING
 Also, document LinSpaced only where it is implemented

---
 Eigen/src/Core/CwiseNullaryOp.h                          | 9 +++++++--
 Eigen/src/Core/DenseBase.h                               | 7 -------
 doc/snippets/CMakeLists.txt                              | 3 +++
 ...ed_seq.cpp => DenseBase_LinSpaced_seq_deprecated.cpp} | 0
 4 files changed, 10 insertions(+), 9 deletions(-)
 rename doc/snippets/{DenseBase_LinSpaced_seq.cpp => DenseBase_LinSpaced_seq_deprecated.cpp} (100%)

diff --git a/Eigen/src/Core/CwiseNullaryOp.h b/Eigen/src/Core/CwiseNullaryOp.h
index 8612c27b9..ddac9df78 100644
--- a/Eigen/src/Core/CwiseNullaryOp.h
+++ b/Eigen/src/Core/CwiseNullaryOp.h
@@ -232,7 +232,12 @@ DenseBase<Derived>::Constant(const Scalar& value)
 
 /** \deprecated because of accuracy loss. In Eigen 3.3, it is an alias for LinSpaced(Index,const Scalar&,const Scalar&)
   *
-  * \sa LinSpaced(Index,Scalar,Scalar), setLinSpaced(Index,const Scalar&,const Scalar&)
+  * \only_for_vectors
+  *
+  * Example: \include DenseBase_LinSpaced_seq_deprecated.cpp
+  * Output: \verbinclude DenseBase_LinSpaced_seq_deprecated.out
+  *
+  * \sa LinSpaced(Index,const Scalar&, const Scalar&), setLinSpaced(Index,const Scalar&,const Scalar&)
   */
 template<typename Derived>
 EIGEN_DEPRECATED EIGEN_DEVICE_FUNC EIGEN_STRONG_INLINE const typename DenseBase<Derived>::RandomAccessLinSpacedReturnType
@@ -244,7 +249,7 @@ DenseBase<Derived>::LinSpaced(Sequential_t, Index size, const Scalar& low, const
 
 /** \deprecated because of accuracy loss. In Eigen 3.3, it is an alias for LinSpaced(const Scalar&,const Scalar&)
   *
-  * \sa LinSpaced(Scalar,Scalar)
+  * \sa LinSpaced(const Scalar&, const Scalar&)
   */
 template<typename Derived>
 EIGEN_DEPRECATED EIGEN_DEVICE_FUNC EIGEN_STRONG_INLINE const typename DenseBase<Derived>::RandomAccessLinSpacedReturnType
diff --git a/Eigen/src/Core/DenseBase.h b/Eigen/src/Core/DenseBase.h
index bc0186cd8..bd4dd691e 100644
--- a/Eigen/src/Core/DenseBase.h
+++ b/Eigen/src/Core/DenseBase.h
@@ -337,15 +337,8 @@ template<typename Derived> class DenseBase
     EIGEN_DEVICE_FUNC static const ConstantReturnType
     Constant(const Scalar& value);
 
-    /** \deprecated because of accuracy loss.
-      * In Eigen 3.3, it is an alias for LinSpaced(Index,const Scalar&,const Scalar&)
-      */
     EIGEN_DEPRECATED EIGEN_DEVICE_FUNC static const RandomAccessLinSpacedReturnType
     LinSpaced(Sequential_t, Index size, const Scalar& low, const Scalar& high);
-
-    /** \deprecated because of accuracy loss.
-      * In Eigen 3.3, it is an alias for LinSpaced(const Scalar&,const Scalar&)
-      */
     EIGEN_DEPRECATED EIGEN_DEVICE_FUNC static const RandomAccessLinSpacedReturnType
     LinSpaced(Sequential_t, const Scalar& low, const Scalar& high);
 
diff --git a/doc/snippets/CMakeLists.txt b/doc/snippets/CMakeLists.txt
index cf3f6de4f..88ed3419f 100644
--- a/doc/snippets/CMakeLists.txt
+++ b/doc/snippets/CMakeLists.txt
@@ -18,6 +18,9 @@ foreach(snippet_src ${snippets_SRCS})
     if(${snippet_src} MATCHES "cxx11")
       set_target_properties(${compile_snippet_target} PROPERTIES COMPILE_FLAGS "-std=c++11")
     endif()
+    if(${snippet_src} MATCHES "deprecated")
+      set_target_properties(${compile_snippet_target} PROPERTIES COMPILE_FLAGS "-DEIGEN_NO_DEPRECATED_WARNING")
+    endif()
     add_custom_command(
       TARGET ${compile_snippet_target}
       POST_BUILD
diff --git a/doc/snippets/DenseBase_LinSpaced_seq.cpp b/doc/snippets/DenseBase_LinSpaced_seq_deprecated.cpp
similarity index 100%
rename from doc/snippets/DenseBase_LinSpaced_seq.cpp
rename to doc/snippets/DenseBase_LinSpaced_seq_deprecated.cpp