Add general Inverse<> expression with evaluator

Eigen/src/Core/MatrixBase.h

@@ -412,8 +412,13 @@ template<typename Derived> class MatrixBase
     }
     #endif
 
+    #ifdef EIGEN_TEST_EVALUATORS
+    EIGEN_DEVICE_FUNC
+    const Inverse<Derived> inverse() const;
+    #else
     EIGEN_DEVICE_FUNC
     const internal::inverse_impl<Derived> inverse() const;
+    #endif
     template<typename ResultType>
     void computeInverseAndDetWithCheck(
       ResultType& inverse,

Eigen/src/Core/Solve.h

@@ -7,8 +7,8 @@
 // Public License v. 2.0. If a copy of the MPL was not distributed
 // with this file, You can obtain one at http://mozilla.org/MPL/2.0/.
 
-#ifndef EIGEN_INVERSE_H
-#define EIGEN_INVERSE_H
+#ifndef EIGEN_SOLVE_H
+#define EIGEN_SOLVE_H
 
 namespace Eigen {
 
@@ -81,7 +81,7 @@ protected:
 };
 
 
-// Specilaization of the Solve expression for dense results
+// Specialization of the Solve expression for dense results
 template<typename Decomposition, typename RhsType>
 class SolveImpl<Decomposition,RhsType,Dense>
   : public MatrixBase<Solve<Decomposition,RhsType> >

Eigen/src/Core/util/ForwardDeclarations.h

@@ -96,6 +96,7 @@ template<typename BinaryOp,  typename Lhs, typename Rhs>  class CwiseBinaryOp;
 template<typename BinOp,     typename Lhs, typename Rhs>  class SelfCwiseBinaryOp;      // TODO deprecated
 template<typename Derived,   typename Lhs, typename Rhs>  class ProductBase;            // TODO deprecated
 template<typename Decomposition, typename Rhstype>        class Solve;
+template<typename XprType>                                class Inverse;
 
 namespace internal {
   template<typename Lhs, typename Rhs> struct product_tag;