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-rw-r--r--Eigen/src/Core/util/ForwardDeclarations.h2
1 files changed, 2 insertions, 0 deletions
diff --git a/Eigen/src/Core/util/ForwardDeclarations.h b/Eigen/src/Core/util/ForwardDeclarations.h
index 8a8beb9b7..55016e05d 100644
--- a/Eigen/src/Core/util/ForwardDeclarations.h
+++ b/Eigen/src/Core/util/ForwardDeclarations.h
@@ -51,6 +51,8 @@ template<typename MatrixType, unsigned int Mode> class Part;
template<typename MatrixType, unsigned int Mode> class Extract;
template<typename ExpressionType> class Cwise;
template<typename ExpressionType> class WithFormat;
+template<typename MatrixType> struct CommaInitializer;
+
template<typename Lhs, typename Rhs> struct ei_product_mode;
template<typename Lhs, typename Rhs, int ProductMode = ei_product_mode<Lhs,Rhs>::value> struct ProductReturnType;