From caecaf9c9e1745202420ceb3ef5c5b4b935d8995 Mon Sep 17 00:00:00 2001
From: Gael Guennebaud <g.gael@free.fr>
Date: Thu, 29 Mar 2012 13:45:01 +0200
Subject: add missing forward declaration

---
 Eigen/src/Core/PermutationMatrix.h | 2 ++
 1 file changed, 2 insertions(+)

(limited to 'Eigen/src/Core/PermutationMatrix.h')

diff --git a/Eigen/src/Core/PermutationMatrix.h b/Eigen/src/Core/PermutationMatrix.h
index a56c4217a..483b483a7 100644
--- a/Eigen/src/Core/PermutationMatrix.h
+++ b/Eigen/src/Core/PermutationMatrix.h
@@ -56,6 +56,8 @@ namespace internal {
 
 template<typename PermutationType, typename MatrixType, int Side, bool Transposed=false>
 struct permut_matrix_product_retval;
+template<typename PermutationType, typename MatrixType, int Side, bool Transposed=false>
+struct permut_sparsematrix_product_retval;
 enum PermPermProduct_t {PermPermProduct};
 
 } // end namespace internal
-- 
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