_grid becomes private ; use Grid()§

benchmarks/Benchmark_ITT.cc

@@ -538,7 +538,7 @@ public:
     {
       LatticeGaugeField Umu5d(FGrid); 
       std::vector<LatticeColourMatrix> U(4,FGrid);
-      for(int ss=0;ss<Umu._grid->oSites();ss++){
+      for(int ss=0;ss<Umu.Grid()->oSites();ss++){
 	for(int s=0;s<Ls;s++){
 	  Umu5d[Ls*ss+s] = Umu[ss];
 	}

benchmarks/Benchmark_dwf.cc

@@ -122,7 +122,7 @@ int main (int argc, char ** argv)
   // replicate across fifth dimension
   LatticeGaugeField Umu5d(FGrid); 
   std::vector<LatticeColourMatrix> U(4,FGrid);
-  for(int ss=0;ss<Umu._grid->oSites();ss++){
+  for(int ss=0;ss<Umu.Grid()->oSites();ss++){
     for(int s=0;s<Ls;s++){
       Umu5d[Ls*ss+s] = Umu[ss];
     }

benchmarks/Benchmark_dwf_sweep.cc

@@ -132,7 +132,7 @@ void benchDw(std::vector<int> & latt4, int Ls, int threads,int report )
   LatticeGaugeField Umu5d(FGrid); 
 
   // replicate across fifth dimension
-  for(int ss=0;ss<Umu._grid->oSites();ss++){
+  for(int ss=0;ss<Umu.Grid()->oSites();ss++){
     for(int s=0;s<Ls;s++){
       Umu5d[Ls*ss+s] = Umu[ss];
     }
@@ -272,7 +272,7 @@ void benchsDw(std::vector<int> & latt4, int Ls, int threads, int report )
   LatticeGaugeField Umu5d(FGrid); 
 
   // replicate across fifth dimension
-  for(int ss=0;ss<Umu._grid->oSites();ss++){
+  for(int ss=0;ss<Umu.Grid()->oSites();ss++){
     for(int s=0;s<Ls;s++){
       Umu5d[Ls*ss+s] = Umu[ss];
     }

configure.ac

@@ -45,7 +45,7 @@ if test "${OPENMP_CXXFLAGS}X" != "X"; then
   AM_CXXFLAGS="$OPENMP_CXXFLAGS $AM_CXXFLAGS"
   AM_LDFLAGS="$OPENMP_CXXFLAGS $AM_LDFLAGS"
 fi
-ac_openmp=yes
+ac_openmp=no
 
 ############### Checks for header files
 AC_CHECK_HEADERS(stdint.h)

extras/qed-fvol/WilsonLoops.h

@@ -34,7 +34,7 @@ public:
   static void traceDirPlaquette(LatticeComplex &plaq,
                                 const std::vector<GaugeMat> &U, const int mu,
                                 const int nu) {
-    GaugeMat sp(U[0]._grid);
+    GaugeMat sp(U[0].Grid());
     dirPlaquette(sp, U, mu, nu);
     plaq = trace(sp);
   }
@@ -43,9 +43,9 @@ public:
   //////////////////////////////////////////////////
   static void sitePlaquette(LatticeComplex &Plaq,
                             const std::vector<GaugeMat> &U) {
-    LatticeComplex sitePlaq(U[0]._grid);
+    LatticeComplex sitePlaq(U[0].Grid());
     Plaq = zero;
-    for (int mu = 1; mu < U[0]._grid->_ndimension; mu++) {
+    for (int mu = 1; mu < U[0].Grid()->_ndimension; mu++) {
       for (int nu = 0; nu < mu; nu++) {
         traceDirPlaquette(sitePlaq, U, mu, nu);
         Plaq = Plaq + sitePlaq;
@@ -56,13 +56,13 @@ public:
   // sum over all x,y,z,t and over all planes of plaquette
   //////////////////////////////////////////////////
   static Real sumPlaquette(const GaugeLorentz &Umu) {
-    std::vector<GaugeMat> U(4, Umu._grid);
+    std::vector<GaugeMat> U(4, Umu.Grid());
 
-    for (int mu = 0; mu < Umu._grid->_ndimension; mu++) {
+    for (int mu = 0; mu < Umu.Grid()->_ndimension; mu++) {
       U[mu] = PeekIndex<LorentzIndex>(Umu, mu);
     }
 
-    LatticeComplex Plaq(Umu._grid);
+    LatticeComplex Plaq(Umu.Grid());
 
     sitePlaquette(Plaq, U);
 
@@ -74,9 +74,9 @@ public:
   // average over all x,y,z,t and over all planes of plaquette
   //////////////////////////////////////////////////
   static Real avgPlaquette(const GaugeLorentz &Umu) {
-    int ndim = Umu._grid->_ndimension;
+    int ndim = Umu.Grid()->_ndimension;
     Real sumplaq = sumPlaquette(Umu);
-    Real vol = Umu._grid->gSites();
+    Real vol = Umu.Grid()->gSites();
     Real faces = (1.0 * ndim * (ndim - 1)) / 2.0;
     return sumplaq / vol / faces / Nc; // Nc dependent... FIXME
   }
@@ -112,7 +112,7 @@ public:
                                 const std::vector<GaugeMat> &U,
                                 const int Rmu, const int Rnu,
                                 const int mu, const int nu) {
-    GaugeMat sp(U[0]._grid);
+    GaugeMat sp(U[0].Grid());
     wilsonLoop(sp, U, Rmu, Rnu, mu, nu);
     wl = trace(sp);
   }
@@ -122,9 +122,9 @@ public:
   static void siteWilsonLoop(LatticeComplex &Wl,
                             const std::vector<GaugeMat> &U,
                             const int R1, const int R2) {
-    LatticeComplex siteWl(U[0]._grid);
+    LatticeComplex siteWl(U[0].Grid());
     Wl = zero;
-    for (int mu = 1; mu < U[0]._grid->_ndimension; mu++) {
+    for (int mu = 1; mu < U[0].Grid()->_ndimension; mu++) {
       for (int nu = 0; nu < mu; nu++) {
         traceWilsonLoop(siteWl, U, R1, R2, mu, nu);
         Wl = Wl + siteWl;
@@ -140,9 +140,9 @@ public:
   static void siteTimelikeWilsonLoop(LatticeComplex &Wl,
                             const std::vector<GaugeMat> &U,
                             const int R1, const int R2) {
-    LatticeComplex siteWl(U[0]._grid);
+    LatticeComplex siteWl(U[0].Grid());
 
-    int ndim = U[0]._grid->_ndimension;
+    int ndim = U[0].Grid()->_ndimension;
 
     Wl = zero;
     for (int nu = 0; nu < ndim - 1; nu++) {
@@ -156,10 +156,10 @@ public:
   static void siteSpatialWilsonLoop(LatticeComplex &Wl,
                             const std::vector<GaugeMat> &U,
                             const int R1, const int R2) {
-    LatticeComplex siteWl(U[0]._grid);
+    LatticeComplex siteWl(U[0].Grid());
 
     Wl = zero;
-    for (int mu = 1; mu < U[0]._grid->_ndimension - 1; mu++) {
+    for (int mu = 1; mu < U[0].Grid()->_ndimension - 1; mu++) {
       for (int nu = 0; nu < mu; nu++) {
         traceWilsonLoop(siteWl, U, R1, R2, mu, nu);
         Wl = Wl + siteWl;
@@ -173,13 +173,13 @@ public:
   //////////////////////////////////////////////////
   static Real sumWilsonLoop(const GaugeLorentz &Umu,
                             const int R1, const int R2) {
-    std::vector<GaugeMat> U(4, Umu._grid);
+    std::vector<GaugeMat> U(4, Umu.Grid());
 
-    for (int mu = 0; mu < Umu._grid->_ndimension; mu++) {
+    for (int mu = 0; mu < Umu.Grid()->_ndimension; mu++) {
       U[mu] = PeekIndex<LorentzIndex>(Umu, mu);
     }
 
-    LatticeComplex Wl(Umu._grid);
+    LatticeComplex Wl(Umu.Grid());
 
     siteWilsonLoop(Wl, U, R1, R2);
 
@@ -192,13 +192,13 @@ public:
   //////////////////////////////////////////////////
   static Real sumTimelikeWilsonLoop(const GaugeLorentz &Umu,
                             const int R1, const int R2) {
-    std::vector<GaugeMat> U(4, Umu._grid);
+    std::vector<GaugeMat> U(4, Umu.Grid());
 
-    for (int mu = 0; mu < Umu._grid->_ndimension; mu++) {
+    for (int mu = 0; mu < Umu.Grid()->_ndimension; mu++) {
       U[mu] = PeekIndex<LorentzIndex>(Umu, mu);
     }
 
-    LatticeComplex Wl(Umu._grid);
+    LatticeComplex Wl(Umu.Grid());
 
     siteTimelikeWilsonLoop(Wl, U, R1, R2);
 
@@ -211,13 +211,13 @@ public:
   //////////////////////////////////////////////////
   static Real sumSpatialWilsonLoop(const GaugeLorentz &Umu,
                             const int R1, const int R2) {
-    std::vector<GaugeMat> U(4, Umu._grid);
+    std::vector<GaugeMat> U(4, Umu.Grid());
 
-    for (int mu = 0; mu < Umu._grid->_ndimension; mu++) {
+    for (int mu = 0; mu < Umu.Grid()->_ndimension; mu++) {
       U[mu] = PeekIndex<LorentzIndex>(Umu, mu);
     }
 
-    LatticeComplex Wl(Umu._grid);
+    LatticeComplex Wl(Umu.Grid());
 
     siteSpatialWilsonLoop(Wl, U, R1, R2);
 
@@ -230,9 +230,9 @@ public:
   //////////////////////////////////////////////////
   static Real avgWilsonLoop(const GaugeLorentz &Umu,
                             const int R1, const int R2) {
-    int ndim = Umu._grid->_ndimension;
+    int ndim = Umu.Grid()->_ndimension;
     Real sumWl = sumWilsonLoop(Umu, R1, R2);
-    Real vol = Umu._grid->gSites();
+    Real vol = Umu.Grid()->gSites();
     Real faces = 1.0 * ndim * (ndim - 1);
     return sumWl / vol / faces / Nc; // Nc dependent... FIXME
   }
@@ -241,9 +241,9 @@ public:
   //////////////////////////////////////////////////
   static Real avgTimelikeWilsonLoop(const GaugeLorentz &Umu,
                             const int R1, const int R2) {
-    int ndim = Umu._grid->_ndimension;
+    int ndim = Umu.Grid()->_ndimension;
     Real sumWl = sumTimelikeWilsonLoop(Umu, R1, R2);
-    Real vol = Umu._grid->gSites();
+    Real vol = Umu.Grid()->gSites();
     Real faces = 1.0 * (ndim - 1);
     return sumWl / vol / faces / Nc; // Nc dependent... FIXME
   }
@@ -252,9 +252,9 @@ public:
   //////////////////////////////////////////////////
   static Real avgSpatialWilsonLoop(const GaugeLorentz &Umu,
                             const int R1, const int R2) {
-    int ndim = Umu._grid->_ndimension;
+    int ndim = Umu.Grid()->_ndimension;
     Real sumWl = sumSpatialWilsonLoop(Umu, R1, R2);
-    Real vol = Umu._grid->gSites();
+    Real vol = Umu.Grid()->gSites();
     Real faces = 1.0 * (ndim - 1) * (ndim - 2);
     return sumWl / vol / faces / Nc; // Nc dependent... FIXME
   }
@@ -262,4 +262,4 @@ public:
 
 END_QEDFVOL_NAMESPACE
 
-#endif // QEDFVOL_WILSONLOOPS_H
+#endif // QEDFVOL_WILSONLOOPS_H

lib/algorithms/CoarsenedMatrix.h

@@ -266,8 +266,8 @@ public:
 
   RealD M (const CoarseVector &in, CoarseVector &out){
 
-    conformable(_grid,in._grid);
+    conformable(_grid,in.Grid());
-    conformable(in._grid,out._grid);
+    conformable(in.Grid(),out.Grid());
 
     SimpleCompressor<siteVector> compressor;
     Stencil.HaloExchange(in,compressor);

lib/algorithms/FFT.h

@@ -148,8 +148,8 @@ public:
   template<class vobj>
   void FFT_dim_mask(Lattice<vobj> &result,const Lattice<vobj> &source,std::vector<int> mask,int sign){
 
-    conformable(result._grid,vgrid);
+    conformable(result.Grid(),vgrid);
-    conformable(source._grid,vgrid);
+    conformable(source.Grid(),vgrid);
     Lattice<vobj> tmp(vgrid);
     tmp = source;
     for(int d=0;d<Nd;d++){
@@ -172,8 +172,8 @@ public:
 #ifndef HAVE_FFTW
     assert(0);
 #else
-    conformable(result._grid,vgrid);
+    conformable(result.Grid(),vgrid);
-    conformable(source._grid,vgrid);
+    conformable(source.Grid(),vgrid);
 
     int L = vgrid->_ldimensions[dim];
     int G = vgrid->_fdimensions[dim];

lib/algorithms/LinearOperator.h

@@ -183,7 +183,7 @@ public:
   virtual  RealD Mpc      (const Field &in, Field &out) =0;
   virtual  RealD MpcDag   (const Field &in, Field &out) =0;
   virtual void MpcDagMpc(const Field &in, Field &out,RealD &ni,RealD &no) {
-    Field tmp(in._grid);
+    Field tmp(in.Grid());
     ni=Mpc(in,tmp);
     no=MpcDag(tmp,out);
   }
@@ -215,8 +215,8 @@ protected:
 public:
   SchurDiagMooeeOperator (Matrix &Mat): _Mat(Mat){};
   virtual  RealD Mpc      (const Field &in, Field &out) {
-    Field tmp(in._grid);
+    Field tmp(in.Grid());
-    //	std::cout <<"grid pointers: in._grid="<< in._grid << " out._grid=" << out._grid << "  _Mat.Grid=" << _Mat.Grid() << " _Mat.RedBlackGrid=" << _Mat.RedBlackGrid() << std::endl;
+    //	std::cout <<"grid pointers: in.Grid()="<< in.Grid() << " out.Grid()=" << out.Grid() << "  _Mat.Grid=" << _Mat.Grid() << " _Mat.RedBlackGrid=" << _Mat.RedBlackGrid() << std::endl;
 
     _Mat.Meooe(in,tmp);
     _Mat.MooeeInv(tmp,out);
@@ -226,7 +226,7 @@ public:
     return axpy_norm(out,-1.0,tmp,out);
   }
   virtual  RealD MpcDag   (const Field &in, Field &out){
-    Field tmp(in._grid);
+    Field tmp(in.Grid());
 
     _Mat.MeooeDag(in,tmp);
     _Mat.MooeeInvDag(tmp,out);
@@ -244,7 +244,7 @@ public:
   SchurDiagOneOperator (Matrix &Mat): _Mat(Mat){};
 
   virtual  RealD Mpc      (const Field &in, Field &out) {
-    Field tmp(in._grid);
+    Field tmp(in.Grid());
 
     _Mat.Meooe(in,out);
     _Mat.MooeeInv(out,tmp);
@@ -254,7 +254,7 @@ public:
     return axpy_norm(out,-1.0,tmp,in);
   }
   virtual  RealD MpcDag   (const Field &in, Field &out){
-    Field tmp(in._grid);
+    Field tmp(in.Grid());
 
     _Mat.MooeeInvDag(in,out);
     _Mat.MeooeDag(out,tmp);
@@ -272,7 +272,7 @@ public:
   SchurDiagTwoOperator (Matrix &Mat): _Mat(Mat){};
 
   virtual  RealD Mpc      (const Field &in, Field &out) {
-    Field tmp(in._grid);
+    Field tmp(in.Grid());
 
     _Mat.MooeeInv(in,out);
     _Mat.Meooe(out,tmp);
@@ -282,7 +282,7 @@ public:
     return axpy_norm(out,-1.0,tmp,in);
   }
   virtual  RealD MpcDag   (const Field &in, Field &out){
-    Field tmp(in._grid);
+    Field tmp(in.Grid());
 
     _Mat.MeooeDag(in,out);
     _Mat.MooeeInvDag(out,tmp);
@@ -321,8 +321,8 @@ public:
     Mpc(in,out);
   }
   virtual  RealD Mpc      (const Field &in, Field &out) {
-    Field tmp(in._grid);
+    Field tmp(in.Grid());
-    Field tmp2(in._grid);
+    Field tmp2(in.Grid());
 
     std::cout << GridLogIterative << " HermOp.Mpc "<<std::endl;
     _Mat.Mooee(in,out);
@@ -437,8 +437,8 @@ public:
   // Implement the required interface
   void operator() (LinearOperatorBase<Field> &Linop, const Field &in, Field &out) {
 
-    Field AtoN(in._grid);
+    Field AtoN(in.Grid());
-    Field Mtmp(in._grid);
+    Field Mtmp(in.Grid());
     AtoN = in;
     out = AtoN*Coeffs[0];
     for(int n=1;n<Coeffs.size();n++){

lib/algorithms/SparseMatrix.h

@@ -41,7 +41,7 @@ public:
   virtual RealD M    (const Field &in, Field &out)=0;
   virtual RealD Mdag (const Field &in, Field &out)=0;
   virtual void  MdagM(const Field &in, Field &out,RealD &ni,RealD &no) {
-    Field tmp (in._grid);
+    Field tmp (in.Grid());
     ni=M(in,tmp);
     no=Mdag(tmp,out);
   }

lib/algorithms/approx/Chebyshev.h

@@ -212,9 +212,9 @@ public:
   // Implement the required interface
   void operator() (LinearOperatorBase<Field> &Linop, const Field &in, Field &out) {
 
-    GridBase *grid=in._grid;
+    GridBase *grid=in.Grid();
 
-    // std::cout << "Chevyshef(): in._grid="<<in._grid<<std::endl;
+    // std::cout << "Chevyshef(): in.Grid()="<<in.Grid()<<std::endl;
     //std::cout <<" Linop.Grid()="<<Linop.Grid()<<"Linop.RedBlackGrid()="<<Linop.RedBlackGrid()<<std::endl;
 
     int vol=grid->gSites();
@@ -321,7 +321,7 @@ public:
   // shift_Multiply in Rudy's code
   void AminusMuSq(LinearOperatorBase<Field> &Linop, const Field &in, Field &out) 
   {
-    GridBase *grid=in._grid;
+    GridBase *grid=in.Grid();
     Field tmp(grid);
 
     RealD aa= alpha*alpha;
@@ -338,7 +338,7 @@ public:
   // Implement the required interface
   void operator() (LinearOperatorBase<Field> &Linop, const Field &in, Field &out) {
 
-    GridBase *grid=in._grid;
+    GridBase *grid=in.Grid();
 
     int vol=grid->gSites();
 

lib/algorithms/iterative/AdefGeneric.h

@@ -91,7 +91,7 @@ class TwoLevelFlexiblePcg : public LinearFunction<Field>
   void operator() (const Field &src, Field &psi){
 
     psi.Checkerboard() = src.Checkerboard();
-    grid             = src._grid;
+    grid             = src.Grid();
 
     RealD f;
     RealD rtzp,rtz,a,d,b;

lib/algorithms/iterative/BlockConjugateGradient.h

@@ -139,7 +139,7 @@ public:
   void BlockCGrQsolve(LinearOperatorBase<Field> &Linop, const Field &B, Field &X) 
   {
     int Orthog = blockDim; // First dimension is block dim; this is an assumption
-    Nblock = B._grid->_fdimensions[Orthog];
+    Nblock = B.Grid()->_fdimensions[Orthog];
 
     std::cout<<GridLogMessage<<" Block Conjugate Gradient : Orthog "<<Orthog<<" Nblock "<<Nblock<<std::endl;
 
@@ -323,7 +323,7 @@ public:
   void BlockCGsolve(LinearOperatorBase<Field> &Linop, const Field &Src, Field &Psi) 
   {
     int Orthog = blockDim; // First dimension is block dim; this is an assumption
-    Nblock = Src._grid->_fdimensions[Orthog];
+    Nblock = Src.Grid()->_fdimensions[Orthog];
 
     std::cout<<GridLogMessage<<" Block Conjugate Gradient : Orthog "<<Orthog<<" Nblock "<<Nblock<<std::endl;
 
@@ -470,7 +470,7 @@ public:
   void CGmultiRHSsolve(LinearOperatorBase<Field> &Linop, const Field &Src, Field &Psi) 
   {
     int Orthog = blockDim; // First dimension is block dim
-    Nblock = Src._grid->_fdimensions[Orthog];
+    Nblock = Src.Grid()->_fdimensions[Orthog];
 
     std::cout<<GridLogMessage<<"MultiRHS Conjugate Gradient : Orthog "<<Orthog<<" Nblock "<<Nblock<<std::endl;
 

lib/algorithms/iterative/ConjugateGradientMixedPrec.h

@@ -73,7 +73,7 @@ public:
     RealD src_norm = norm2(src_d_in);
     RealD stop = src_norm * Tolerance*Tolerance;
 
-    GridBase* DoublePrecGrid = src_d_in._grid;
+    GridBase* DoublePrecGrid = src_d_in.Grid();
     FieldD tmp_d(DoublePrecGrid);
     tmp_d.Checkerboard() = cb;
     

lib/algorithms/iterative/ConjugateGradientMultiShift.h

@@ -55,7 +55,7 @@ public:
 
   void operator() (LinearOperatorBase<Field> &Linop, const Field &src, Field &psi)
   {
-    GridBase *grid = src._grid;
+    GridBase *grid = src.Grid();
     int nshift = shifts.order;
     std::vector<Field> results(nshift,grid);
     (*this)(Linop,src,results,psi);
@@ -77,7 +77,7 @@ public:
   void operator() (LinearOperatorBase<Field> &Linop, const Field &src, std::vector<Field> &psi)
   {
   
-    GridBase *grid = src._grid;
+    GridBase *grid = src.Grid();
   
     ////////////////////////////////////////////////////////////////////////
     // Convenience references to the info stored in "MultiShiftFunction"

lib/algorithms/iterative/ConjugateResidual.h

@@ -55,7 +55,7 @@ public:
     RealD rAr, rAAr, rArp;
     RealD pAp, pAAp;
 
-    GridBase *grid = src._grid;
+    GridBase *grid = src.Grid();
     psi=zero;
     Field r(grid),  p(grid), Ap(grid), Ar(grid);
       

lib/algorithms/iterative/ImplicitlyRestartedLanczos.h

@@ -53,7 +53,7 @@ template<class Field>
 void basisRotate(std::vector<Field> &basis,Eigen::MatrixXd& Qt,int j0, int j1, int k0,int k1,int Nm) 
 {
   typedef typename Field::vector_object vobj;
-  GridBase* grid = basis[0]._grid;
+  GridBase* grid = basis[0].Grid();
       
   parallel_region
   {
@@ -79,7 +79,7 @@ template<class Field>
 void basisRotateJ(Field &result,std::vector<Field> &basis,Eigen::MatrixXd& Qt,int j, int k0,int k1,int Nm) 
 {
   typedef typename Field::vector_object vobj;
-  GridBase* grid = basis[0]._grid;
+  GridBase* grid = basis[0].Grid();
 
   result.Checkerboard() = basis[0].Checkerboard();
   parallel_for(int ss=0;ss < grid->oSites();ss++){
@@ -331,8 +331,8 @@ until convergence
 */
   void calc(std::vector<RealD>& eval, std::vector<Field>& evec,  const Field& src, int& Nconv, bool reverse=false)
   {
-    GridBase *grid = src._grid;
+    GridBase *grid = src.Grid();
-    assert(grid == evec[0]._grid);
+    assert(grid == evec[0].Grid());
     
     GridLogIRL.TimingMode(1);
     std::cout << GridLogIRL <<"**************************************************************************"<< std::endl;

lib/algorithms/iterative/NormalEquations.h

@@ -48,7 +48,7 @@ public:
 
   void operator() (const Field &in, Field &out){
  
-    Field src(in._grid);
+    Field src(in.Grid());
 
     _Matrix.Mdag(in,src);
     _HermitianSolver(src,out);  // Mdag M out = Mdag in

lib/algorithms/iterative/PrecConjugateResidual.h

@@ -56,7 +56,7 @@ public:
     RealD rAr, rAAr, rArp;
     RealD pAp, pAAp;
 
-    GridBase *grid = src._grid;
+    GridBase *grid = src.Grid();
     Field r(grid),  p(grid), Ap(grid), Ar(grid), z(grid);
       
     psi=zero;

lib/algorithms/iterative/PrecGeneralisedConjugateResidual.h

@@ -70,7 +70,7 @@ public:
     ssq=norm2(src);
     rsq=Tolerance*Tolerance*ssq;
       
-    Field r(src._grid);
+    Field r(src.Grid());
 
     PrecTimer.Reset();
     MatTimer.Reset();
@@ -117,7 +117,7 @@ public:
     RealD zAz, zAAz;
     RealD rAq, rq;
 
-    GridBase *grid = src._grid;
+    GridBase *grid = src.Grid();
 
     Field r(grid);
     Field z(grid);

lib/cshift/Cshift_common.h

@@ -36,17 +36,17 @@ NAMESPACE_BEGIN(Grid);
 template<class vobj> void 
 Gather_plane_simple (const Lattice<vobj> &rhs,commVector<vobj> &buffer,int dimension,int plane,int cbmask, int off=0)
 {
-  int rd = rhs._grid->_rdimensions[dimension];
+  int rd = rhs.Grid()->_rdimensions[dimension];
 
-  if ( !rhs._grid->CheckerBoarded(dimension) ) {
+  if ( !rhs.Grid()->CheckerBoarded(dimension) ) {
     cbmask = 0x3;
   }
   
-  int so=plane*rhs._grid->_ostride[dimension]; // base offset for start of plane 
+  int so=plane*rhs.Grid()->_ostride[dimension]; // base offset for start of plane 
-  int e1=rhs._grid->_slice_nblock[dimension];
+  int e1=rhs.Grid()->_slice_nblock[dimension];
-  int e2=rhs._grid->_slice_block[dimension];
+  int e2=rhs.Grid()->_slice_block[dimension];
 
-  int stride=rhs._grid->_slice_stride[dimension];
+  int stride=rhs.Grid()->_slice_stride[dimension];
   if ( cbmask == 0x3 ) { 
     thread_loop_collapse( (int n=0;n<e1;n++) , 
       for(int b=0;b<e2;b++){
@@ -61,7 +61,7 @@ Gather_plane_simple (const Lattice<vobj> &rhs,commVector<vobj> &buffer,int dimen
     for(int n=0;n<e1;n++){
       for(int b=0;b<e2;b++){
 	int o  = n*stride;
-	int ocb=1<<rhs._grid->CheckerBoardFromOindex(o+b);
+	int ocb=1<<rhs.Grid()->CheckerBoardFromOindex(o+b);
 	if ( ocb &cbmask ) {
 	  table.push_back(std::pair<int,int> (bo++,o+b));
 	}
@@ -79,17 +79,17 @@ Gather_plane_simple (const Lattice<vobj> &rhs,commVector<vobj> &buffer,int dimen
 template<class vobj> void 
 Gather_plane_extract(const Lattice<vobj> &rhs,std::vector<typename vobj::scalar_object *> pointers,int dimension,int plane,int cbmask)
 {
-  int rd = rhs._grid->_rdimensions[dimension];
+  int rd = rhs.Grid()->_rdimensions[dimension];
 
-  if ( !rhs._grid->CheckerBoarded(dimension) ) {
+  if ( !rhs.Grid()->CheckerBoarded(dimension) ) {
     cbmask = 0x3;
   }
 
-  int so  = plane*rhs._grid->_ostride[dimension]; // base offset for start of plane 
+  int so  = plane*rhs.Grid()->_ostride[dimension]; // base offset for start of plane 
 
-  int e1=rhs._grid->_slice_nblock[dimension];
+  int e1=rhs.Grid()->_slice_nblock[dimension];
-  int e2=rhs._grid->_slice_block[dimension];
+  int e2=rhs.Grid()->_slice_block[dimension];
-  int n1=rhs._grid->_slice_stride[dimension];
+  int n1=rhs.Grid()->_slice_stride[dimension];
 
   if ( cbmask ==0x3){
     thread_loop_collapse( (int n=0;n<e1;n++), {
@@ -112,7 +112,7 @@ Gather_plane_extract(const Lattice<vobj> &rhs,std::vector<typename vobj::scalar_
       for(int b=0;b<e2;b++){
 
 	int o=n*n1;
-	int ocb=1<<rhs._grid->CheckerBoardFromOindex(o+b);
+	int ocb=1<<rhs.Grid()->CheckerBoardFromOindex(o+b);
 	int offset = b+n*e2;
 
 	if ( ocb & cbmask ) {
@@ -129,23 +129,23 @@ Gather_plane_extract(const Lattice<vobj> &rhs,std::vector<typename vobj::scalar_
 //////////////////////////////////////////////////////
 template<class vobj> void Scatter_plane_simple (Lattice<vobj> &rhs,commVector<vobj> &buffer, int dimension,int plane,int cbmask)
 {
-  int rd = rhs._grid->_rdimensions[dimension];
+  int rd = rhs.Grid()->_rdimensions[dimension];
 
-  if ( !rhs._grid->CheckerBoarded(dimension) ) {
+  if ( !rhs.Grid()->CheckerBoarded(dimension) ) {
     cbmask=0x3;
   }
 
-  int so  = plane*rhs._grid->_ostride[dimension]; // base offset for start of plane 
+  int so  = plane*rhs.Grid()->_ostride[dimension]; // base offset for start of plane 
     
-  int e1=rhs._grid->_slice_nblock[dimension];
+  int e1=rhs.Grid()->_slice_nblock[dimension];
-  int e2=rhs._grid->_slice_block[dimension];
+  int e2=rhs.Grid()->_slice_block[dimension];
-  int stride=rhs._grid->_slice_stride[dimension];
+  int stride=rhs.Grid()->_slice_stride[dimension];
   
   if ( cbmask ==0x3 ) {
     thread_loop_collapse( (int n=0;n<e1;n++),{
       for(int b=0;b<e2;b++){
-	int o   =n*rhs._grid->_slice_stride[dimension];
+	int o   =n*rhs.Grid()->_slice_stride[dimension];
-	int bo  =n*rhs._grid->_slice_block[dimension];
+	int bo  =n*rhs.Grid()->_slice_block[dimension];
 	rhs[so+o+b]=buffer[bo+b];
       }
     });
@@ -154,8 +154,8 @@ template<class vobj> void Scatter_plane_simple (Lattice<vobj> &rhs,commVector<vo
     int bo=0;
     for(int n=0;n<e1;n++){
       for(int b=0;b<e2;b++){
-	int o   =n*rhs._grid->_slice_stride[dimension];
+	int o   =n*rhs.Grid()->_slice_stride[dimension];
-	int ocb=1<<rhs._grid->CheckerBoardFromOindex(o+b);// Could easily be a table lookup
+	int ocb=1<<rhs.Grid()->CheckerBoardFromOindex(o+b);// Could easily be a table lookup
 	if ( ocb & cbmask ) {
 	  table.push_back(std::pair<int,int> (so+o+b,bo++));
 	}
@@ -172,22 +172,22 @@ template<class vobj> void Scatter_plane_simple (Lattice<vobj> &rhs,commVector<vo
 //////////////////////////////////////////////////////
 template<class vobj> void Scatter_plane_merge(Lattice<vobj> &rhs,std::vector<typename vobj::scalar_object *> pointers,int dimension,int plane,int cbmask)
 {
-  int rd = rhs._grid->_rdimensions[dimension];
+  int rd = rhs.Grid()->_rdimensions[dimension];
 
-  if ( !rhs._grid->CheckerBoarded(dimension) ) {
+  if ( !rhs.Grid()->CheckerBoarded(dimension) ) {
     cbmask=0x3;
   }
 
-  int so  = plane*rhs._grid->_ostride[dimension]; // base offset for start of plane 
+  int so  = plane*rhs.Grid()->_ostride[dimension]; // base offset for start of plane 
     
-  int e1=rhs._grid->_slice_nblock[dimension];
+  int e1=rhs.Grid()->_slice_nblock[dimension];
-  int e2=rhs._grid->_slice_block[dimension];
+  int e2=rhs.Grid()->_slice_block[dimension];
 
   if(cbmask ==0x3 ) {
     thread_loop_collapse( (int n=0;n<e1;n++),{
       for(int b=0;b<e2;b++){
-	int o      = n*rhs._grid->_slice_stride[dimension];
+	int o      = n*rhs.Grid()->_slice_stride[dimension];
-	int offset = b+n*rhs._grid->_slice_block[dimension];
+	int offset = b+n*rhs.Grid()->_slice_block[dimension];
 	merge(rhs[so+o+b],pointers,offset);
       }
     });
@@ -199,9 +199,9 @@ template<class vobj> void Scatter_plane_merge(Lattice<vobj> &rhs,std::vector<typ
     std::cout<<" Unthreaded warning -- buffer is not densely packed ??"<<std::endl;
     for(int n=0;n<e1;n++){
       for(int b=0;b<e2;b++){
-	int o      = n*rhs._grid->_slice_stride[dimension];
+	int o      = n*rhs.Grid()->_slice_stride[dimension];
-	int offset = b+n*rhs._grid->_slice_block[dimension];
+	int offset = b+n*rhs.Grid()->_slice_block[dimension];
-	int ocb=1<<rhs._grid->CheckerBoardFromOindex(o+b);
+	int ocb=1<<rhs.Grid()->CheckerBoardFromOindex(o+b);
 	if ( ocb&cbmask ) {
 	  merge(rhs[so+o+b],pointers,offset);
 	}
@@ -215,18 +215,18 @@ template<class vobj> void Scatter_plane_merge(Lattice<vobj> &rhs,std::vector<typ
 //////////////////////////////////////////////////////
 template<class vobj> void Copy_plane(Lattice<vobj>& lhs,const Lattice<vobj> &rhs, int dimension,int lplane,int rplane,int cbmask)
 {
-  int rd = rhs._grid->_rdimensions[dimension];
+  int rd = rhs.Grid()->_rdimensions[dimension];
 
-  if ( !rhs._grid->CheckerBoarded(dimension) ) {
+  if ( !rhs.Grid()->CheckerBoarded(dimension) ) {
     cbmask=0x3;
   }
 
-  int ro  = rplane*rhs._grid->_ostride[dimension]; // base offset for start of plane 
+  int ro  = rplane*rhs.Grid()->_ostride[dimension]; // base offset for start of plane 
-  int lo  = lplane*lhs._grid->_ostride[dimension]; // base offset for start of plane 
+  int lo  = lplane*lhs.Grid()->_ostride[dimension]; // base offset for start of plane 
 
-  int e1=rhs._grid->_slice_nblock[dimension]; // clearly loop invariant for icpc
+  int e1=rhs.Grid()->_slice_nblock[dimension]; // clearly loop invariant for icpc
-  int e2=rhs._grid->_slice_block[dimension];
+  int e2=rhs.Grid()->_slice_block[dimension];
-  int stride = rhs._grid->_slice_stride[dimension];
+  int stride = rhs.Grid()->_slice_stride[dimension];
   if(cbmask == 0x3 ){
     thread_loop_collapse( (int n=0;n<e1;n++),{
       for(int b=0;b<e2;b++){
@@ -239,7 +239,7 @@ template<class vobj> void Copy_plane(Lattice<vobj>& lhs,const Lattice<vobj> &rhs
     thread_loop_collapse( (int n=0;n<e1;n++),{
       for(int b=0;b<e2;b++){
         int o =n*stride+b;
-        int ocb=1<<lhs._grid->CheckerBoardFromOindex(o);
+        int ocb=1<<lhs.Grid()->CheckerBoardFromOindex(o);
         if ( ocb&cbmask ) {
 	  //lhs[lo+o]=rhs[ro+o];
 	  vstream(lhs[lo+o],rhs[ro+o]);
@@ -253,24 +253,24 @@ template<class vobj> void Copy_plane(Lattice<vobj>& lhs,const Lattice<vobj> &rhs
 template<class vobj> void Copy_plane_permute(Lattice<vobj>& lhs,const Lattice<vobj> &rhs, int dimension,int lplane,int rplane,int cbmask,int permute_type)
 {
  
-  int rd = rhs._grid->_rdimensions[dimension];
+  int rd = rhs.Grid()->_rdimensions[dimension];
 
-  if ( !rhs._grid->CheckerBoarded(dimension) ) {
+  if ( !rhs.Grid()->CheckerBoarded(dimension) ) {
     cbmask=0x3;
   }
 
-  int ro  = rplane*rhs._grid->_ostride[dimension]; // base offset for start of plane 
+  int ro  = rplane*rhs.Grid()->_ostride[dimension]; // base offset for start of plane 
-  int lo  = lplane*lhs._grid->_ostride[dimension]; // base offset for start of plane 
+  int lo  = lplane*lhs.Grid()->_ostride[dimension]; // base offset for start of plane 
 
-  int e1=rhs._grid->_slice_nblock[dimension];
+  int e1=rhs.Grid()->_slice_nblock[dimension];
-  int e2=rhs._grid->_slice_block [dimension];
+  int e2=rhs.Grid()->_slice_block [dimension];
-  int stride = rhs._grid->_slice_stride[dimension];
+  int stride = rhs.Grid()->_slice_stride[dimension];
 
   thread_loop_collapse( (int n=0;n<e1;n++),{
     for(int b=0;b<e2;b++){
 
       int o  =n*stride;
-      int ocb=1<<lhs._grid->CheckerBoardFromOindex(o+b);
+      int ocb=1<<lhs.Grid()->CheckerBoardFromOindex(o+b);
       if ( ocb&cbmask ) {
 	permute(lhs[lo+o+b],rhs[ro+o+b],permute_type);
       }
@@ -285,8 +285,8 @@ template<class vobj> void Cshift_local(Lattice<vobj>& ret,const Lattice<vobj> &r
 {
   int sshift[2];
 
-  sshift[0] = rhs._grid->CheckerBoardShiftForCB(rhs.Checkerboard(),dimension,shift,Even);
+  sshift[0] = rhs.Grid()->CheckerBoardShiftForCB(rhs.Checkerboard(),dimension,shift,Even);
-  sshift[1] = rhs._grid->CheckerBoardShiftForCB(rhs.Checkerboard(),dimension,shift,Odd);
+  sshift[1] = rhs.Grid()->CheckerBoardShiftForCB(rhs.Checkerboard(),dimension,shift,Odd);
 
   if ( sshift[0] == sshift[1] ) {
     Cshift_local(ret,rhs,dimension,shift,0x3);
@@ -298,7 +298,7 @@ template<class vobj> void Cshift_local(Lattice<vobj>& ret,const Lattice<vobj> &r
 
 template<class vobj> Lattice<vobj> Cshift_local(Lattice<vobj> &ret,const Lattice<vobj> &rhs,int dimension,int shift,int cbmask)
 {
-  GridBase *grid = rhs._grid;
+  GridBase *grid = rhs.Grid();
   int fd = grid->_fdimensions[dimension];
   int rd = grid->_rdimensions[dimension];
   int ld = grid->_ldimensions[dimension];

lib/cshift/Cshift_mpi.h

@@ -37,20 +37,20 @@ template<class vobj> Lattice<vobj> Cshift(const Lattice<vobj> &rhs,int dimension
   typedef typename vobj::vector_type vector_type;
   typedef typename vobj::scalar_type scalar_type;
 
-  Lattice<vobj> ret(rhs._grid); 
+  Lattice<vobj> ret(rhs.Grid()); 
   
-  int fd = rhs._grid->_fdimensions[dimension];
+  int fd = rhs.Grid()->_fdimensions[dimension];
-  int rd = rhs._grid->_rdimensions[dimension];
+  int rd = rhs.Grid()->_rdimensions[dimension];
 
   // Map to always positive shift modulo global full dimension.
   shift = (shift+fd)%fd;
 
-  ret.Checkerboard() = rhs._grid->CheckerBoardDestination(rhs.Checkerboard(),shift,dimension);
+  ret.Checkerboard() = rhs.Grid()->CheckerBoardDestination(rhs.Checkerboard(),shift,dimension);
         
   // the permute type
-  int simd_layout     = rhs._grid->_simd_layout[dimension];
+  int simd_layout     = rhs.Grid()->_simd_layout[dimension];
-  int comm_dim        = rhs._grid->_processors[dimension] >1 ;
+  int comm_dim        = rhs.Grid()->_processors[dimension] >1 ;
-  int splice_dim      = rhs._grid->_simd_layout[dimension]>1 && (comm_dim);
+  int splice_dim      = rhs.Grid()->_simd_layout[dimension]>1 && (comm_dim);
 
 
   if ( !comm_dim ) {
@@ -70,8 +70,8 @@ template<class vobj> void Cshift_comms(Lattice<vobj>& ret,const Lattice<vobj> &r
 {
   int sshift[2];
 
-  sshift[0] = rhs._grid->CheckerBoardShiftForCB(rhs.Checkerboard(),dimension,shift,Even);
+  sshift[0] = rhs.Grid()->CheckerBoardShiftForCB(rhs.Checkerboard(),dimension,shift,Even);
-  sshift[1] = rhs._grid->CheckerBoardShiftForCB(rhs.Checkerboard(),dimension,shift,Odd);
+  sshift[1] = rhs.Grid()->CheckerBoardShiftForCB(rhs.Checkerboard(),dimension,shift,Odd);
 
   //  std::cout << "Cshift_comms dim "<<dimension<<"cb "<<rhs.Checkerboard()<<"shift "<<shift<<" sshift " << sshift[0]<<" "<<sshift[1]<<std::endl;
   if ( sshift[0] == sshift[1] ) {
@@ -88,8 +88,8 @@ template<class vobj> void Cshift_comms_simd(Lattice<vobj>& ret,const Lattice<vob
 {
   int sshift[2];
 
-  sshift[0] = rhs._grid->CheckerBoardShiftForCB(rhs.Checkerboard(),dimension,shift,Even);
+  sshift[0] = rhs.Grid()->CheckerBoardShiftForCB(rhs.Checkerboard(),dimension,shift,Even);
-  sshift[1] = rhs._grid->CheckerBoardShiftForCB(rhs.Checkerboard(),dimension,shift,Odd);
+  sshift[1] = rhs.Grid()->CheckerBoardShiftForCB(rhs.Checkerboard(),dimension,shift,Odd);
 
   if ( sshift[0] == sshift[1] ) {
     Cshift_comms_simd(ret,rhs,dimension,shift,0x3);
@@ -104,25 +104,25 @@ template<class vobj> void Cshift_comms(Lattice<vobj> &ret,const Lattice<vobj> &r
   typedef typename vobj::vector_type vector_type;
   typedef typename vobj::scalar_type scalar_type;
 
-  GridBase *grid=rhs._grid;
+  GridBase *grid=rhs.Grid();
-  Lattice<vobj> temp(rhs._grid);
+  Lattice<vobj> temp(rhs.Grid());
 
-  int fd              = rhs._grid->_fdimensions[dimension];
+  int fd              = rhs.Grid()->_fdimensions[dimension];
-  int rd              = rhs._grid->_rdimensions[dimension];
+  int rd              = rhs.Grid()->_rdimensions[dimension];
-  int pd              = rhs._grid->_processors[dimension];
+  int pd              = rhs.Grid()->_processors[dimension];
-  int simd_layout     = rhs._grid->_simd_layout[dimension];
+  int simd_layout     = rhs.Grid()->_simd_layout[dimension];
-  int comm_dim        = rhs._grid->_processors[dimension] >1 ;
+  int comm_dim        = rhs.Grid()->_processors[dimension] >1 ;
   assert(simd_layout==1);
   assert(comm_dim==1);
   assert(shift>=0);
   assert(shift<fd);
   
-  int buffer_size = rhs._grid->_slice_nblock[dimension]*rhs._grid->_slice_block[dimension];
+  int buffer_size = rhs.Grid()->_slice_nblock[dimension]*rhs.Grid()->_slice_block[dimension];
   commVector<vobj> send_buf(buffer_size);
   commVector<vobj> recv_buf(buffer_size);
 
   int cb= (cbmask==0x2)? Odd : Even;
-  int sshift= rhs._grid->CheckerBoardShiftForCB(rhs.Checkerboard(),dimension,shift,cb);
+  int sshift= rhs.Grid()->CheckerBoardShiftForCB(rhs.Checkerboard(),dimension,shift,cb);
 
   for(int x=0;x<rd;x++){       
 
@@ -162,7 +162,7 @@ template<class vobj> void Cshift_comms(Lattice<vobj> &ret,const Lattice<vobj> &r
 
 template<class vobj> void  Cshift_comms_simd(Lattice<vobj> &ret,const Lattice<vobj> &rhs,int dimension,int shift,int cbmask)
 {
-  GridBase *grid=rhs._grid;
+  GridBase *grid=rhs.Grid();
   const int Nsimd = grid->Nsimd();
   typedef typename vobj::vector_type vector_type;
   typedef typename vobj::scalar_object scalar_object;

lib/cshift/Cshift_none.h

@@ -30,8 +30,8 @@ Author: Peter Boyle <paboyle@ph.ed.ac.uk>
 NAMESPACE_BEGIN(Grid);
 template<class vobj> Lattice<vobj> Cshift(const Lattice<vobj> &rhs,int dimension,int shift)
 {
-  Lattice<vobj> ret(rhs._grid);
+  Lattice<vobj> ret(rhs.Grid());
-  ret.Checkerboard() = rhs._grid->CheckerBoardDestination(rhs.Checkerboard(),shift,dimension);
+  ret.Checkerboard() = rhs.Grid()->CheckerBoardDestination(rhs.Checkerboard(),shift,dimension);
   Cshift_local(ret,rhs,dimension,shift);
   return ret;
 }

lib/lattice/Lattice_ET.h

@@ -141,9 +141,9 @@ template <class T1,
 inline void GridFromExpression(GridBase *&grid, const T1 &lat)  // Lattice leaf
 {
   if (grid) {
-    conformable(grid, lat._grid);
+    conformable(grid, lat.Grid());
   }
-  grid = lat._grid;
+  grid = lat.Grid();
 }
 template <class T1,
           typename std::enable_if<!is_lattice<T1>::value, T1>::type * = nullptr>

lib/lattice/Lattice_base.h

@@ -106,9 +106,10 @@ void inline conformable(GridBase *lhs,GridBase *rhs)
 template<class vobj>
 class Lattice : public LatticeAccelerator<vobj>
 {
-public: // Move to private and fix
+protected: // Move to private and fix
   GridBase *_grid;
 public:
+  GridBase *Grid(void) const { return _grid; }
   ///////////////////////////////////////////////////
   // Member types
   ///////////////////////////////////////////////////
@@ -328,7 +329,7 @@ public:
   }
   Lattice(const Lattice& r){ // copy constructor
     //    std::cout << "Lattice constructor(const Lattice &) "<<this<<std::endl; 
-    _grid = r._grid;
+    _grid = r.Grid();
     resize(r._odata_size);
     this->checkerboard = r.Checkerboard();
     accelerator_loop(ss,(*this),{
@@ -337,7 +338,7 @@ public:
   }
   Lattice(Lattice && r){ // move constructor
     //    std::cout << "Lattice move constructor(Lattice &) "<<this<<std::endl; 
-    _grid = r._grid;
+    _grid = r.Grid();
     this->_odata      = r._odata;
     this->_odata_size = r._odata_size;
     this->checkerboard= r.Checkerboard();
@@ -370,7 +371,7 @@ public:
     //    std::cout << "Lattice = (Lattice &&)"<<std::endl; 
     resize(0); // delete if appropriate
 
-    this->_grid        = r._grid;
+    this->_grid        = r.Grid();
     this->checkerboard = r.Checkerboard();
 
     this->_odata      = r._odata;
@@ -403,8 +404,8 @@ template<class vobj> std::ostream& operator<< (std::ostream& stream, const Latti
   std::vector<int> gcoor;
   typedef typename vobj::scalar_object sobj;
   sobj ss;
-  for(int g=0;g<o._grid->_gsites;g++){
+  for(int g=0;g<o.Grid()->_gsites;g++){
-    o._grid->GlobalIndexToGlobalCoor(g,gcoor);
+    o.Grid()->GlobalIndexToGlobalCoor(g,gcoor);
     peekSite(ss,o,gcoor);
     stream<<"[";
     for(int d=0;d<gcoor.size();d++){

lib/lattice/Lattice_comparison.h

@@ -46,7 +46,7 @@ NAMESPACE_BEGIN(Grid);
 template<class vfunctor,class lobj,class robj>  
 inline Lattice<vInteger> LLComparison(vfunctor op,const Lattice<lobj> &lhs,const Lattice<robj> &rhs)
 {
-  Lattice<vInteger> ret(rhs._grid);
+  Lattice<vInteger> ret(rhs.Grid());
   accelerator_loop( ss, rhs, {
     ret[ss]=op(lhs[ss],rhs[ss]);
   });
@@ -58,7 +58,7 @@ inline Lattice<vInteger> LLComparison(vfunctor op,const Lattice<lobj> &lhs,const
 template<class vfunctor,class lobj,class robj> 
 inline Lattice<vInteger> LSComparison(vfunctor op,const Lattice<lobj> &lhs,const robj &rhs)
 {
-  Lattice<vInteger> ret(lhs._grid);
+  Lattice<vInteger> ret(lhs.Grid());
   accelerator_loop( ss, lhs, {
     ret[ss]=op(lhs[ss],rhs);
   });
@@ -70,7 +70,7 @@ inline Lattice<vInteger> LSComparison(vfunctor op,const Lattice<lobj> &lhs,const
 template<class vfunctor,class lobj,class robj> 
 inline Lattice<vInteger> SLComparison(vfunctor op,const lobj &lhs,const Lattice<robj> &rhs)
 {
-  Lattice<vInteger> ret(rhs._grid);
+  Lattice<vInteger> ret(rhs.Grid());
   accelerator_loop( ss, rhs, {
     ret[ss]=op(lhs[ss],rhs);
   });

lib/lattice/Lattice_conformable.h

@@ -32,7 +32,7 @@ NAMESPACE_BEGIN(Grid);
 
 template<class obj1,class obj2> void conformable(const Lattice<obj1> &lhs,const Lattice<obj2> &rhs)
 {
-  assert(lhs._grid == rhs._grid);
+  assert(lhs.Grid() == rhs.Grid());
   assert(lhs.Checkerboard() == rhs.Checkerboard());
 }
 

lib/lattice/Lattice_coordinate.h

@@ -35,7 +35,7 @@ template<class iobj> inline void LatticeCoordinate(Lattice<iobj> &l,int mu)
   typedef typename iobj::scalar_type scalar_type;
   typedef typename iobj::vector_type vector_type;
 
-  GridBase *grid = l._grid;
+  GridBase *grid = l.Grid();
   int Nsimd = grid->iSites();
 
   std::vector<int> gcoor;
@@ -56,7 +56,7 @@ template<class iobj> inline void LatticeCoordinate(Lattice<iobj> &l,int mu)
 // FIXME for debug; deprecate this; made obscelete by 
 template<class vobj> void lex_sites(Lattice<vobj> &l){
   Real *v_ptr = (Real *)&l[0];
-  size_t o_len = l._grid->oSites();
+  size_t o_len = l.Grid()->oSites();
   size_t v_len = sizeof(vobj)/sizeof(vRealF);
   size_t vec_len = vRealF::Nsimd();
 

lib/lattice/Lattice_local.h

@@ -42,7 +42,7 @@ NAMESPACE_BEGIN(Grid);
 template<class vobj>
 inline auto localNorm2 (const Lattice<vobj> &rhs)-> Lattice<typename vobj::tensor_reduced>
 {
-  Lattice<typename vobj::tensor_reduced> ret(rhs._grid);
+  Lattice<typename vobj::tensor_reduced> ret(rhs.Grid());
   accelerator_loop(ss,rhs,{
     ret[ss]=innerProduct(rhs[ss],rhs[ss]);
   });
@@ -53,7 +53,7 @@ inline auto localNorm2 (const Lattice<vobj> &rhs)-> Lattice<typename vobj::tenso
 template<class vobj>
 inline auto localInnerProduct (const Lattice<vobj> &lhs,const Lattice<vobj> &rhs) -> Lattice<typename vobj::tensor_reduced>
 {
-  Lattice<typename vobj::tensor_reduced> ret(rhs._grid);
+  Lattice<typename vobj::tensor_reduced> ret(rhs.Grid());
   accelerator_loop(ss,rhs,{
     ret[ss]=innerProduct(lhs[ss],rhs[ss]);
   });
@@ -65,7 +65,7 @@ inline auto localInnerProduct (const Lattice<vobj> &lhs,const Lattice<vobj> &rhs
 template<class ll,class rr>
 inline auto outerProduct (const Lattice<ll> &lhs,const Lattice<rr> &rhs) -> Lattice<decltype(outerProduct(lhs[0],rhs[0]))>
 {
-  Lattice<decltype(outerProduct(lhs[0],rhs[0]))> ret(rhs._grid);
+  Lattice<decltype(outerProduct(lhs[0],rhs[0]))> ret(rhs.Grid());
   accelerator_loop(ss,rhs,{
     ret[ss]=outerProduct(lhs[ss],rhs[ss]);
   });

lib/lattice/Lattice_matrix_reduction.h

@@ -35,9 +35,9 @@ static void sliceMaddMatrix (Lattice<vobj> &R,Eigen::MatrixXcd &aa,const Lattice
   typedef typename vobj::scalar_type scalar_type;
   typedef typename vobj::vector_type vector_type;
 
-  int Nblock = X._grid->GlobalDimensions()[Orthog];
+  int Nblock = X.Grid()->GlobalDimensions()[Orthog];
 
-  GridBase *FullGrid  = X._grid;
+  GridBase *FullGrid  = X.Grid();
   //  GridBase *SliceGrid = makeSubSliceGrid(FullGrid,Orthog);
 
   //  Lattice<vobj> Xslice(SliceGrid);
@@ -83,9 +83,9 @@ static void sliceMulMatrix (Lattice<vobj> &R,Eigen::MatrixXcd &aa,const Lattice<
   typedef typename vobj::scalar_type scalar_type;
   typedef typename vobj::vector_type vector_type;
 
-  int Nblock = X._grid->GlobalDimensions()[Orthog];
+  int Nblock = X.Grid()->GlobalDimensions()[Orthog];
 
-  GridBase *FullGrid  = X._grid;
+  GridBase *FullGrid  = X.Grid();
   //  GridBase *SliceGrid = makeSubSliceGrid(FullGrid,Orthog);
   //  Lattice<vobj> Xslice(SliceGrid);
   //  Lattice<vobj> Rslice(SliceGrid);
@@ -135,7 +135,7 @@ static void sliceInnerProductMatrix(  Eigen::MatrixXcd &mat, const Lattice<vobj>
   typedef typename vobj::scalar_type scalar_type;
   typedef typename vobj::vector_type vector_type;
   
-  GridBase *FullGrid  = lhs._grid;
+  GridBase *FullGrid  = lhs.Grid();
   //  GridBase *SliceGrid = makeSubSliceGrid(FullGrid,Orthog);
   
   int Nblock = FullGrid->GlobalDimensions()[Orthog];

lib/lattice/Lattice_peekpoke.h

@@ -44,7 +44,7 @@ NAMESPACE_BEGIN(Grid);
 template<int Index,class vobj> 
 auto PeekIndex(const Lattice<vobj> &lhs,int i) -> Lattice<decltype(peekIndex<Index>(lhs[0],i))>
 {
-  Lattice<decltype(peekIndex<Index>(lhs[0],i))> ret(lhs._grid);
+  Lattice<decltype(peekIndex<Index>(lhs[0],i))> ret(lhs.Grid());
   ret.Checkerboard()=lhs.Checkerboard();
   cpu_loop( ss, lhs, {
     ret[ss] = peekIndex<Index>(lhs[ss],i);
@@ -54,7 +54,7 @@ auto PeekIndex(const Lattice<vobj> &lhs,int i) -> Lattice<decltype(peekIndex<Ind
 template<int Index,class vobj> 
 auto PeekIndex(const Lattice<vobj> &lhs,int i,int j) -> Lattice<decltype(peekIndex<Index>(lhs[0],i,j))>
 {
-  Lattice<decltype(peekIndex<Index>(lhs[0],i,j))> ret(lhs._grid);
+  Lattice<decltype(peekIndex<Index>(lhs[0],i,j))> ret(lhs.Grid());
   ret.Checkerboard()=lhs.Checkerboard();
   cpu_loop( ss, lhs, {
     ret[ss] = peekIndex<Index>(lhs[ss],i,j);
@@ -86,14 +86,14 @@ void PokeIndex(Lattice<vobj> &lhs,const Lattice<decltype(peekIndex<Index>(lhs[0]
 template<class vobj,class sobj> 
 void pokeSite(const sobj &s,Lattice<vobj> &l,const std::vector<int> &site){
 
-  GridBase *grid=l._grid;
+  GridBase *grid=l.Grid();
 
   typedef typename vobj::scalar_type scalar_type;
   typedef typename vobj::vector_type vector_type;
 
   int Nsimd = grid->Nsimd();
 
-  assert( l.Checkerboard()== l._grid->CheckerBoard(site));
+  assert( l.Checkerboard()== l.Grid()->CheckerBoard(site));
   assert( sizeof(sobj)*Nsimd == sizeof(vobj));
 
   int rank,odx,idx;
@@ -120,14 +120,14 @@ void pokeSite(const sobj &s,Lattice<vobj> &l,const std::vector<int> &site){
 template<class vobj,class sobj>
 void peekSite(sobj &s,const Lattice<vobj> &l,const std::vector<int> &site){
         
-  GridBase *grid=l._grid;
+  GridBase *grid=l.Grid();
 
   typedef typename vobj::scalar_type scalar_type;
   typedef typename vobj::vector_type vector_type;
 
   int Nsimd = grid->Nsimd();
 
-  assert( l.Checkerboard() == l._grid->CheckerBoard(site));
+  assert( l.Checkerboard() == l.Grid()->CheckerBoard(site));
 
   int rank,odx,idx;
   grid->GlobalCoorToRankIndex(rank,odx,idx,site);
@@ -149,14 +149,14 @@ void peekSite(sobj &s,const Lattice<vobj> &l,const std::vector<int> &site){
 template<class vobj,class sobj>
 void peekLocalSite(sobj &s,const Lattice<vobj> &l,std::vector<int> &site){
         
-  GridBase *grid = l._grid;
+  GridBase *grid = l.Grid();
 
   typedef typename vobj::scalar_type scalar_type;
   typedef typename vobj::vector_type vector_type;
 
   int Nsimd = grid->Nsimd();
 
-  assert( l.Checkerboard()== l._grid->CheckerBoard(site));
+  assert( l.Checkerboard()== l.Grid()->CheckerBoard(site));
   assert( sizeof(sobj)*Nsimd == sizeof(vobj));
 
   static const int words=sizeof(vobj)/sizeof(vector_type);
@@ -177,14 +177,14 @@ void peekLocalSite(sobj &s,const Lattice<vobj> &l,std::vector<int> &site){
 template<class vobj,class sobj>
 void pokeLocalSite(const sobj &s,Lattice<vobj> &l,std::vector<int> &site){
 
-  GridBase *grid=l._grid;
+  GridBase *grid=l.Grid();
 
   typedef typename vobj::scalar_type scalar_type;
   typedef typename vobj::vector_type vector_type;
 
   int Nsimd = grid->Nsimd();
 
-  assert( l.Checkerboard()== l._grid->CheckerBoard(site));
+  assert( l.Checkerboard()== l.Grid()->CheckerBoard(site));
   assert( sizeof(sobj)*Nsimd == sizeof(vobj));
 
   static const int words=sizeof(vobj)/sizeof(vector_type);

lib/lattice/Lattice_reality.h

@@ -39,7 +39,7 @@ Author: neo <cossu@post.kek.jp>
 NAMESPACE_BEGIN(Grid);
 
 template<class vobj> inline Lattice<vobj> adj(const Lattice<vobj> &lhs){
-  Lattice<vobj> ret(lhs._grid);
+  Lattice<vobj> ret(lhs.Grid());
   accelerator_loop( ss, lhs, {
     ret[ss] = adj(lhs[ss]);
   });
@@ -47,7 +47,7 @@ template<class vobj> inline Lattice<vobj> adj(const Lattice<vobj> &lhs){
 };
 
 template<class vobj> inline Lattice<vobj> conjugate(const Lattice<vobj> &lhs){
-  Lattice<vobj> ret(lhs._grid);
+  Lattice<vobj> ret(lhs.Grid());
   accelerator_loop( ss, lhs, {
     ret[ss] = conjugate(lhs[ss]);
   });

lib/lattice/Lattice_reduction.h

@@ -44,13 +44,13 @@ inline ComplexD innerProduct(const Lattice<vobj> &left,const Lattice<vobj> &righ
   typedef typename vobj::vector_typeD vector_type;
   scalar_type  nrm;
   
-  GridBase *grid = left._grid;
+  GridBase *grid = left.Grid();
   
   std::vector<vector_type,alignedAllocator<vector_type> > sumarray(grid->SumArraySize());
   
   parallel_for(int thr=0;thr<grid->SumArraySize();thr++){
     int mywork, myoff;
-    GridThread::GetWork(left._grid->oSites(),thr,mywork,myoff);
+    GridThread::GetWork(left.Grid()->oSites(),thr,mywork,myoff);
     
     decltype(innerProductD(left[0],right[0])) vnrm=zero; // private to thread; sub summation
     for(int ss=myoff;ss<mywork+myoff; ss++){
@@ -64,7 +64,7 @@ inline ComplexD innerProduct(const Lattice<vobj> &left,const Lattice<vobj> &righ
     vvnrm = vvnrm+sumarray[i];
   } 
   nrm = Reduce(vvnrm);// sum across simd
-  right._grid->GlobalSum(nrm);
+  right.Grid()->GlobalSum(nrm);
   return nrm;
 }
  
@@ -96,7 +96,7 @@ inline auto sum(const LatticeTrinaryExpression<Op,T1,T2,T3> & expr)
 template<class vobj>
 inline typename vobj::scalar_object sum(const Lattice<vobj> &arg)
 {
-  GridBase *grid=arg._grid;
+  GridBase *grid=arg.Grid();
   int Nsimd = grid->Nsimd();
   
   std::vector<vobj,alignedAllocator<vobj> > sumarray(grid->SumArraySize());
@@ -127,7 +127,7 @@ inline typename vobj::scalar_object sum(const Lattice<vobj> &arg)
   extract(vsum,buf);
   
   for(int i=0;i<Nsimd;i++) ssum = ssum + buf[i];
-  arg._grid->GlobalSum(ssum);
+  arg.Grid()->GlobalSum(ssum);
   
   return ssum;
 }
@@ -145,7 +145,7 @@ template<class vobj> inline void sliceSum(const Lattice<vobj> &Data,std::vector<
   // But easily avoided by using double precision fields
   ///////////////////////////////////////////////////////
   typedef typename vobj::scalar_object sobj;
-  GridBase  *grid = Data._grid;
+  GridBase  *grid = Data.Grid();
   assert(grid!=NULL);
 
   const int    Nd = grid->_ndimension;
@@ -225,9 +225,9 @@ static void sliceInnerProductVector( std::vector<ComplexD> & result, const Latti
 {
   typedef typename vobj::vector_type   vector_type;
   typedef typename vobj::scalar_type   scalar_type;
-  GridBase  *grid = lhs._grid;
+  GridBase  *grid = lhs.Grid();
   assert(grid!=NULL);
-  conformable(grid,rhs._grid);
+  conformable(grid,rhs.Grid());
 
   const int    Nd = grid->_ndimension;
   const int Nsimd = grid->Nsimd();
@@ -307,7 +307,7 @@ static void sliceNorm (std::vector<RealD> &sn,const Lattice<vobj> &rhs,int Ortho
   typedef typename vobj::scalar_type scalar_type;
   typedef typename vobj::vector_type vector_type;
   
-  int Nblock = rhs._grid->GlobalDimensions()[Orthog];
+  int Nblock = rhs.Grid()->GlobalDimensions()[Orthog];
   std::vector<ComplexD> ip(Nblock);
   sn.resize(Nblock);
   
@@ -329,7 +329,7 @@ static void sliceMaddVector(Lattice<vobj> &R,std::vector<RealD> &a,const Lattice
   
   scalar_type zscale(scale);
 
-  GridBase *grid  = X._grid;
+  GridBase *grid  = X.Grid();
 
   int Nsimd  =grid->Nsimd();
   int Nblock =grid->GlobalDimensions()[orthogdim];

lib/lattice/Lattice_rng.h

@@ -311,13 +311,13 @@ public:
 };
 
 class GridParallelRNG : public GridRNGbase {
-
+private:
   double _time_counter;
-
-public:
   GridBase *_grid;
   unsigned int _vol;
 
+public:
+  GridBase *Grid(void) const { return _grid; }
   int generator_idx(int os,int is) {
     return is*_grid->oSites()+os;
   }
@@ -341,9 +341,9 @@ public:
 
     double inner_time_counter = usecond();
 
-    int multiplicity = RNGfillable_general(_grid, l._grid); // l has finer or same grid
+    int multiplicity = RNGfillable_general(_grid, l.Grid()); // l has finer or same grid
-    int Nsimd  = _grid->Nsimd();  // guaranteed to be the same for l._grid too
+    int Nsimd  = _grid->Nsimd();  // guaranteed to be the same for l.Grid() too
-    int osites = _grid->oSites();  // guaranteed to be <= l._grid->oSites() by a factor multiplicity
+    int osites = _grid->oSites();  // guaranteed to be <= l.Grid()->oSites() by a factor multiplicity
     int words  = sizeof(scalar_object) / sizeof(scalar_type);
 
     thread_loop( (int ss=0;ss<osites;ss++), {

lib/lattice/Lattice_trace.h

@@ -41,7 +41,7 @@ template<class vobj>
 inline auto trace(const Lattice<vobj> &lhs)
   -> Lattice<decltype(trace(lhs[0]))>
 {
-  Lattice<decltype(trace(lhs[0]))> ret(lhs._grid);
+  Lattice<decltype(trace(lhs[0]))> ret(lhs.Grid());
   accelerator_loop( ss, lhs, {
     ret[ss] = trace(lhs[ss]);
   });
@@ -54,7 +54,7 @@ inline auto trace(const Lattice<vobj> &lhs)
 template<int Index,class vobj>
 inline auto TraceIndex(const Lattice<vobj> &lhs) -> Lattice<decltype(traceIndex<Index>(lhs[0]))>
 {
-  Lattice<decltype(traceIndex<Index>(lhs[0]))> ret(lhs._grid);
+  Lattice<decltype(traceIndex<Index>(lhs[0]))> ret(lhs.Grid());
   accelerator_loop( ss, lhs, {
     ret[ss] = traceIndex<Index>(lhs[ss]);
   });

lib/lattice/Lattice_transfer.h

@@ -51,29 +51,29 @@ inline void subdivides(GridBase *coarse,GridBase *fine)
 template<class vobj> inline void pickCheckerboard(int cb,Lattice<vobj> &half,const Lattice<vobj> &full){
   half.Checkerboard() = cb;
 
-  thread_loop( (int ss=0;ss<full._grid->oSites();ss++),{
+  thread_loop( (int ss=0;ss<full.Grid()->oSites();ss++),{
     int cbos;
     std::vector<int> coor;
-    full._grid->oCoorFromOindex(coor,ss);
+    full.Grid()->oCoorFromOindex(coor,ss);
-    cbos=half._grid->CheckerBoard(coor);
+    cbos=half.Grid()->CheckerBoard(coor);
       
     if (cbos==cb) {
-      int ssh=half._grid->oIndex(coor);
+      int ssh=half.Grid()->oIndex(coor);
       half[ssh] = full[ss];
     }
   });
 }
 template<class vobj> inline void setCheckerboard(Lattice<vobj> &full,const Lattice<vobj> &half){
   int cb = half.Checkerboard();
-  thread_loop( (int ss=0;ss<full._grid->oSites();ss++), {
+  thread_loop( (int ss=0;ss<full.Grid()->oSites();ss++), {
     std::vector<int> coor;
     int cbos;
 
-    full._grid->oCoorFromOindex(coor,ss);
+    full.Grid()->oCoorFromOindex(coor,ss);
-    cbos=half._grid->CheckerBoard(coor);
+    cbos=half.Grid()->CheckerBoard(coor);
       
     if (cbos==cb) {
-      int ssh=half._grid->oIndex(coor);
+      int ssh=half.Grid()->oIndex(coor);
       full[ss]=half[ssh];
     }
   });
@@ -85,8 +85,8 @@ inline void blockProject(Lattice<iVector<CComplex,nbasis > > &coarseData,
 			 const             Lattice<vobj>   &fineData,
 			 const std::vector<Lattice<vobj> > &Basis)
 {
-  GridBase * fine  = fineData._grid;
+  GridBase * fine  = fineData.Grid();
-  GridBase * coarse= coarseData._grid;
+  GridBase * coarse= coarseData.Grid();
   int  _ndimension = coarse->_ndimension;
 
   // checks
@@ -132,8 +132,8 @@ inline void blockZAXPY(Lattice<vobj> &fineZ,
 		       const Lattice<vobj> &fineX,
 		       const Lattice<vobj> &fineY)
 {
-  GridBase * fine  = fineZ._grid;
+  GridBase * fine  = fineZ.Grid();
-  GridBase * coarse= coarseA._grid;
+  GridBase * coarse= coarseA.Grid();
 
   fineZ.Checkerboard()=fineX.Checkerboard();
   assert(fineX.Checkerboard()==fineY.Checkerboard());
@@ -175,8 +175,8 @@ inline void blockInnerProduct(Lattice<CComplex> &CoarseInner,
 {
   typedef decltype(innerProduct(fineX[0],fineY[0])) dotp;
 
-  GridBase *coarse(CoarseInner._grid);
+  GridBase *coarse(CoarseInner.Grid());
-  GridBase *fine  (fineX._grid);
+  GridBase *fine  (fineX.Grid());
 
   Lattice<dotp> fine_inner(fine); fine_inner.Checkerboard() = fineX.Checkerboard();
   Lattice<dotp> coarse_inner(coarse);
@@ -191,8 +191,8 @@ inline void blockInnerProduct(Lattice<CComplex> &CoarseInner,
 template<class vobj,class CComplex>
 inline void blockNormalise(Lattice<CComplex> &ip,Lattice<vobj> &fineX)
 {
-  GridBase *coarse = ip._grid;
+  GridBase *coarse = ip.Grid();
-  Lattice<vobj> zz(fineX._grid); zz=zero; zz.Checkerboard()=fineX.Checkerboard();
+  Lattice<vobj> zz(fineX.Grid()); zz=zero; zz.Checkerboard()=fineX.Checkerboard();
   blockInnerProduct(ip,fineX,fineX);
   ip = pow(ip,-0.5);
   blockZAXPY(fineX,ip,fineX,zz);
@@ -202,8 +202,8 @@ inline void blockNormalise(Lattice<CComplex> &ip,Lattice<vobj> &fineX)
 template<class vobj>
 inline void blockSum(Lattice<vobj> &coarseData,const Lattice<vobj> &fineData)
 {
-  GridBase * fine  = fineData._grid;
+  GridBase * fine  = fineData.Grid();
-  GridBase * coarse= coarseData._grid;
+  GridBase * coarse= coarseData.Grid();
 
   subdivides(coarse,fine); // require they map
 
@@ -242,7 +242,7 @@ inline void blockSum(Lattice<vobj> &coarseData,const Lattice<vobj> &fineData)
 template<class vobj>
 inline void blockPick(GridBase *coarse,const Lattice<vobj> &unpicked,Lattice<vobj> &picked,std::vector<int> coor)
 {
-  GridBase * fine = unpicked._grid;
+  GridBase * fine = unpicked.Grid();
 
   Lattice<vobj> zz(fine); zz.Checkerboard() = unpicked.Checkerboard();
   Lattice<iScalar<vInteger> > fcoor(fine);
@@ -263,15 +263,15 @@ inline void blockPick(GridBase *coarse,const Lattice<vobj> &unpicked,Lattice<vob
 template<class vobj,class CComplex>
 inline void blockOrthogonalise(Lattice<CComplex> &ip,std::vector<Lattice<vobj> > &Basis)
 {
-  GridBase *coarse = ip._grid;
+  GridBase *coarse = ip.Grid();
-  GridBase *fine   = Basis[0]._grid;
+  GridBase *fine   = Basis[0].Grid();
 
   int       nbasis = Basis.size() ;
 
   // checks
   subdivides(coarse,fine); 
   for(int i=0;i<nbasis;i++){
-    conformable(Basis[i]._grid,fine);
+    conformable(Basis[i].Grid(),fine);
   }
 
   for(int v=0;v<nbasis;v++) {
@@ -290,15 +290,15 @@ inline void blockPromote(const Lattice<iVector<CComplex,nbasis > > &coarseData,
 			 Lattice<vobj>   &fineData,
 			 const std::vector<Lattice<vobj> > &Basis)
 {
-  GridBase * fine  = fineData._grid;
+  GridBase * fine  = fineData.Grid();
-  GridBase * coarse= coarseData._grid;
+  GridBase * coarse= coarseData.Grid();
   int  _ndimension = coarse->_ndimension;
 
   // checks
   assert( nbasis == Basis.size() );
   subdivides(coarse,fine); 
   for(int i=0;i<nbasis;i++){
-    conformable(Basis[i]._grid,fine);
+    conformable(Basis[i].Grid(),fine);
   }
 
   std::vector<int>  block_r      (_ndimension);
@@ -337,8 +337,8 @@ void localConvert(const Lattice<vobj> &in,Lattice<vvobj> &out)
   typedef typename vobj::scalar_object sobj;
   typedef typename vvobj::scalar_object ssobj;
 
-  GridBase *ig = in._grid;
+  GridBase *ig = in.Grid();
-  GridBase *og = out._grid;
+  GridBase *og = out.Grid();
 
   int ni = ig->_ndimension;
   int no = og->_ndimension;
@@ -369,8 +369,8 @@ void InsertSlice(const Lattice<vobj> &lowDim,Lattice<vobj> & higherDim,int slice
 {
   typedef typename vobj::scalar_object sobj;
 
-  GridBase *lg = lowDim._grid;
+  GridBase *lg = lowDim.Grid();
-  GridBase *hg = higherDim._grid;
+  GridBase *hg = higherDim.Grid();
   int nl = lg->_ndimension;
   int nh = hg->_ndimension;
 
@@ -411,8 +411,8 @@ void ExtractSlice(Lattice<vobj> &lowDim,const Lattice<vobj> & higherDim,int slic
 {
   typedef typename vobj::scalar_object sobj;
 
-  GridBase *lg = lowDim._grid;
+  GridBase *lg = lowDim.Grid();
-  GridBase *hg = higherDim._grid;
+  GridBase *hg = higherDim.Grid();
   int nl = lg->_ndimension;
   int nh = hg->_ndimension;
 
@@ -454,8 +454,8 @@ void InsertSliceLocal(const Lattice<vobj> &lowDim, Lattice<vobj> & higherDim,int
 {
   typedef typename vobj::scalar_object sobj;
 
-  GridBase *lg = lowDim._grid;
+  GridBase *lg = lowDim.Grid();
-  GridBase *hg = higherDim._grid;
+  GridBase *hg = higherDim.Grid();
   int nl = lg->_ndimension;
   int nh = hg->_ndimension;
 
@@ -489,8 +489,8 @@ void ExtractSliceLocal(Lattice<vobj> &lowDim, Lattice<vobj> & higherDim,int slic
 {
   typedef typename vobj::scalar_object sobj;
 
-  GridBase *lg = lowDim._grid;
+  GridBase *lg = lowDim.Grid();
-  GridBase *hg = higherDim._grid;
+  GridBase *hg = higherDim.Grid();
   int nl = lg->_ndimension;
   int nh = hg->_ndimension;
 
@@ -524,8 +524,8 @@ void Replicate(Lattice<vobj> &coarse,Lattice<vobj> & fine)
 {
   typedef typename vobj::scalar_object sobj;
 
-  GridBase *cg = coarse._grid;
+  GridBase *cg = coarse.Grid();
-  GridBase *fg =   fine._grid;
+  GridBase *fg =   fine.Grid();
 
   int nd = cg->_ndimension;
 
@@ -563,7 +563,7 @@ unvectorizeToLexOrdArray(std::vector<sobj> &out, const Lattice<vobj> &in)
 
   typedef typename vobj::vector_type vtype;
   
-  GridBase* in_grid = in._grid;
+  GridBase* in_grid = in.Grid();
   out.resize(in_grid->lSites());
   
   int ndim = in_grid->Nd();
@@ -609,7 +609,7 @@ vectorizeFromLexOrdArray( std::vector<sobj> &in, Lattice<vobj> &out)
 
   typedef typename vobj::vector_type vtype;
   
-  GridBase* grid = out._grid;
+  GridBase* grid = out.Grid();
   assert(in.size()==grid->lSites());
   
   int ndim     = grid->Nd();
@@ -653,15 +653,15 @@ vectorizeFromLexOrdArray( std::vector<sobj> &in, Lattice<vobj> &out)
 template<class VobjOut, class VobjIn>
 void precisionChange(Lattice<VobjOut> &out, const Lattice<VobjIn> &in){
 
-  assert(out._grid->Nd() == in._grid->Nd());
+  assert(out.Grid()->Nd() == in.Grid()->Nd());
   out.Checkerboard() = in.Checkerboard();
-  GridBase *in_grid=in._grid;
+  GridBase *in_grid=in.Grid();
-  GridBase *out_grid = out._grid;
+  GridBase *out_grid = out.Grid();
 
   typedef typename VobjOut::scalar_object SobjOut;
   typedef typename VobjIn::scalar_object SobjIn;
 
-  int ndim = out._grid->Nd();
+  int ndim = out.Grid()->Nd();
   int out_nsimd = out_grid->Nsimd();
     
   std::vector<std::vector<int> > out_icoor(out_nsimd);
@@ -749,8 +749,8 @@ void Grid_split(std::vector<Lattice<Vobj> > & full,Lattice<Vobj>   & split)
 
   assert(full_vecs>=1);
 
-  GridBase * full_grid = full[0]._grid;
+  GridBase * full_grid = full[0].Grid();
-  GridBase *split_grid = split._grid;
+  GridBase *split_grid = split.Grid();
 
   int       ndim  = full_grid->_ndimension;
   int  full_nproc = full_grid->_Nprocessors;
@@ -769,8 +769,8 @@ void Grid_split(std::vector<Lattice<Vobj> > & full,Lattice<Vobj>   & split)
   for(int n=0;n<full_vecs;n++){
     assert(full[n].Checkerboard() == cb);
     for(int d=0;d<ndim;d++){
-      assert(full[n]._grid->_gdimensions[d]==split._grid->_gdimensions[d]);
+      assert(full[n].Grid()->_gdimensions[d]==split.Grid()->_gdimensions[d]);
-      assert(full[n]._grid->_fdimensions[d]==split._grid->_fdimensions[d]);
+      assert(full[n].Grid()->_fdimensions[d]==split.Grid()->_fdimensions[d]);
     }
   }
 
@@ -858,8 +858,8 @@ void Grid_split(std::vector<Lattice<Vobj> > & full,Lattice<Vobj>   & split)
 template<class Vobj>
 void Grid_split(Lattice<Vobj> &full,Lattice<Vobj>   & split)
 {
-  int nvector = full._grid->_Nprocessors / split._grid->_Nprocessors;
+  int nvector = full.Grid()->_Nprocessors / split.Grid()->_Nprocessors;
-  std::vector<Lattice<Vobj> > full_v(nvector,full._grid);
+  std::vector<Lattice<Vobj> > full_v(nvector,full.Grid());
   for(int n=0;n<nvector;n++){
     full_v[n] = full;
   }
@@ -875,8 +875,8 @@ void Grid_unsplit(std::vector<Lattice<Vobj> > & full,Lattice<Vobj>   & split)
 
   assert(full_vecs>=1);
 
-  GridBase * full_grid = full[0]._grid;
+  GridBase * full_grid = full[0].Grid();
-  GridBase *split_grid = split._grid;
+  GridBase *split_grid = split.Grid();
 
   int       ndim  = full_grid->_ndimension;
   int  full_nproc = full_grid->_Nprocessors;
@@ -895,8 +895,8 @@ void Grid_unsplit(std::vector<Lattice<Vobj> > & full,Lattice<Vobj>   & split)
   for(int n=0;n<full_vecs;n++){
     assert(full[n].Checkerboard() == cb);
     for(int d=0;d<ndim;d++){
-      assert(full[n]._grid->_gdimensions[d]==split._grid->_gdimensions[d]);
+      assert(full[n].Grid()->_gdimensions[d]==split.Grid()->_gdimensions[d]);
-      assert(full[n]._grid->_fdimensions[d]==split._grid->_fdimensions[d]);
+      assert(full[n].Grid()->_fdimensions[d]==split.Grid()->_fdimensions[d]);
     }
   }
 

lib/lattice/Lattice_transpose.h

@@ -40,7 +40,7 @@ NAMESPACE_BEGIN(Grid);
 ////////////////////////////////////////////////////////////////////////////////////////////////////
 template<class vobj>
 inline Lattice<vobj> transpose(const Lattice<vobj> &lhs){
-  Lattice<vobj> ret(lhs._grid);
+  Lattice<vobj> ret(lhs.Grid());
   accelerator_loop(ss,lhs,{
     ret[ss] = transpose(lhs[ss]);
   });
@@ -53,7 +53,7 @@ inline Lattice<vobj> transpose(const Lattice<vobj> &lhs){
 template<int Index,class vobj>
 inline auto TransposeIndex(const Lattice<vobj> &lhs) -> Lattice<decltype(transposeIndex<Index>(lhs[0]))>
 {
-  Lattice<decltype(transposeIndex<Index>(lhs[0]))> ret(lhs._grid);
+  Lattice<decltype(transposeIndex<Index>(lhs[0]))> ret(lhs.Grid());
   accelerator_loop(ss,lhs,{
     ret[ss] = transposeIndex<Index>(lhs[ss]);
   });

lib/lattice/Lattice_unary.h

@@ -34,7 +34,7 @@ Author: paboyle <paboyle@ph.ed.ac.uk>
 NAMESPACE_BEGIN(Grid);
 
 template<class obj> Lattice<obj> pow(const Lattice<obj> &rhs,RealD y){
-  Lattice<obj> ret(rhs._grid);
+  Lattice<obj> ret(rhs.Grid());
   ret.Checkerboard() = rhs.Checkerboard();
   conformable(ret,rhs);
   accelerator_loop(ss,rhs,{
@@ -43,7 +43,7 @@ template<class obj> Lattice<obj> pow(const Lattice<obj> &rhs,RealD y){
   return ret;
 }
 template<class obj> Lattice<obj> mod(const Lattice<obj> &rhs,Integer y){
-  Lattice<obj> ret(rhs._grid);
+  Lattice<obj> ret(rhs.Grid());
   ret.Checkerboard() = rhs.Checkerboard();
   conformable(ret,rhs);
   accelerator_loop(ss,rhs,{
@@ -53,7 +53,7 @@ template<class obj> Lattice<obj> mod(const Lattice<obj> &rhs,Integer y){
 }
 
 template<class obj> Lattice<obj> div(const Lattice<obj> &rhs,Integer y){
-  Lattice<obj> ret(rhs._grid);
+  Lattice<obj> ret(rhs.Grid());
   ret.Checkerboard() = rhs.Checkerboard();
   conformable(ret,rhs);
   accelerator_loop(ss,rhs,{
@@ -63,7 +63,7 @@ template<class obj> Lattice<obj> div(const Lattice<obj> &rhs,Integer y){
 }
 
 template<class obj> Lattice<obj> expMat(const Lattice<obj> &rhs, RealD alpha, Integer Nexp = DEFAULT_MAT_EXP){
-  Lattice<obj> ret(rhs._grid);
+  Lattice<obj> ret(rhs.Grid());
   ret.Checkerboard() = rhs.Checkerboard();
   conformable(ret,rhs);
   accelerator_loop(ss,rhs,{

lib/lattice/Lattice_where.h

@@ -45,7 +45,7 @@ inline void whereWolf(Lattice<vobj> &ret,const Lattice<iobj> &predicate,Lattice<
   conformable(iftrue,predicate);
   conformable(iftrue,ret);
 
-  GridBase *grid=iftrue._grid;
+  GridBase *grid=iftrue.Grid();
 
   typedef typename vobj::scalar_object scalar_object;
   typedef typename vobj::scalar_type scalar_type;
@@ -79,7 +79,7 @@ inline Lattice<vobj> whereWolf(const Lattice<iobj> &predicate,Lattice<vobj> &ift
   conformable(iftrue,iffalse);
   conformable(iftrue,predicate);
 
-  Lattice<vobj> ret(iftrue._grid);
+  Lattice<vobj> ret(iftrue.Grid());
 
   where(ret,predicate,iftrue,iffalse);
 

lib/parallelIO/BinaryIO.h

@@ -89,7 +89,7 @@ public:
   {
     typedef typename vobj::scalar_object sobj;
 
-    GridBase *grid = lat._grid;
+    GridBase *grid = lat.Grid();
     int lsites = grid->lSites();
 
     std::vector<sobj> scalardata(lsites); 
@@ -522,7 +522,7 @@ public:
     typedef typename vobj::scalar_object sobj;
     typedef typename vobj::Realified::scalar_type word;    word w=0;
 
-    GridBase *grid = Umu._grid;
+    GridBase *grid = Umu.Grid();
     int lsites = grid->lSites();
 
     std::vector<sobj> scalardata(lsites); 
@@ -558,7 +558,7 @@ public:
   {
     typedef typename vobj::scalar_object sobj;
     typedef typename vobj::Realified::scalar_type word;    word w=0;
-    GridBase *grid = Umu._grid;
+    GridBase *grid = Umu.Grid();
     int lsites = grid->lSites();
 
     std::vector<sobj> scalardata(lsites); 
@@ -599,7 +599,7 @@ public:
 
     std::string format = "IEEE32BIG";
 
-    GridBase *grid = parallel._grid;
+    GridBase *grid = parallel.Grid();
     int gsites = grid->gSites();
     int lsites = grid->lSites();
 
@@ -659,7 +659,7 @@ public:
     const int RngStateCount = GridSerialRNG::RngStateCount;
     typedef std::array<RngStateType,RngStateCount> RNGstate;
 
-    GridBase *grid = parallel._grid;
+    GridBase *grid = parallel.Grid();
     int gsites = grid->gSites();
     int lsites = grid->lSites();
 

lib/parallelIO/IldgIO.h

@@ -133,7 +133,7 @@ template<class vobj> void ScidacMetaData(Lattice<vobj> & field,
   /////////////////////////////////////
   // Scidac Private File structure
   /////////////////////////////////////
-  _scidacFile              = scidacFile(field._grid);
+  _scidacFile              = scidacFile(field.Grid());
 
   /////////////////////////////////////
   // Scidac Private Record structure
@@ -214,10 +214,10 @@ public:
 
 	//	std::cout << GridLogMessage<< " readLimeLatticeBinaryObject matches ! " <<std::endl;
 
-	uint64_t PayloadSize = sizeof(sobj) * field._grid->_gsites;
+	uint64_t PayloadSize = sizeof(sobj) * field.Grid()->_gsites;
 
 	//	std::cout << "R sizeof(sobj)= " <<sizeof(sobj)<<std::endl;
-	//	std::cout << "R Gsites " <<field._grid->_gsites<<std::endl;
+	//	std::cout << "R Gsites " <<field.Grid()->_gsites<<std::endl;
 	//	std::cout << "R Payload expected " <<PayloadSize<<std::endl;
 	//	std::cout << "R file size " <<file_bytes <<std::endl;
 
@@ -342,11 +342,11 @@ public:
     typedef typename vobj::scalar_object sobj;
     int err;
     uint32_t nersc_csum,scidac_csuma,scidac_csumb;
-    uint64_t PayloadSize = sizeof(sobj) * field._grid->_gsites;
+    uint64_t PayloadSize = sizeof(sobj) * field.Grid()->_gsites;
     createLimeRecordHeader(record_name, 0, 0, PayloadSize);
 
     //    std::cout << "W sizeof(sobj)"      <<sizeof(sobj)<<std::endl;
-    //    std::cout << "W Gsites "           <<field._grid->_gsites<<std::endl;
+    //    std::cout << "W Gsites "           <<field.Grid()->_gsites<<std::endl;
     //    std::cout << "W Payload expected " <<PayloadSize<<std::endl;
 
     ////////////////////////////////////////////////////////////////////
@@ -400,7 +400,7 @@ public:
   template <class vobj, class userRecord>
   void writeScidacFieldRecord(Lattice<vobj> &field,userRecord _userRecord) 
   {
-    GridBase * grid = field._grid;
+    GridBase * grid = field.Grid();
 
     ////////////////////////////////////////
     // fill the Grid header
@@ -439,7 +439,7 @@ public:
   void readScidacFieldRecord(Lattice<vobj> &field,userRecord &_userRecord) 
   {
     typedef typename vobj::scalar_object sobj;
-    GridBase * grid = field._grid;
+    GridBase * grid = field.Grid();
 
     ////////////////////////////////////////
     // fill the Grid header
@@ -504,7 +504,7 @@ public:
   template <class vsimd>
   void writeConfiguration(Lattice<iLorentzColourMatrix<vsimd> > &Umu,int sequence,std::string LFN,std::string description) 
   {
-    GridBase * grid = Umu._grid;
+    GridBase * grid = Umu.Grid();
     typedef Lattice<iLorentzColourMatrix<vsimd> > GaugeField;
     typedef iLorentzColourMatrix<vsimd> vobj;
     typedef typename vobj::scalar_object sobj;
@@ -591,9 +591,9 @@ public:
     typedef LorentzColourMatrixF fobj;
     typedef LorentzColourMatrixD dobj;
 
-    GridBase *grid = Umu._grid;
+    GridBase *grid = Umu.Grid();
 
-    std::vector<int> dims = Umu._grid->FullDimensions();
+    std::vector<int> dims = Umu.Grid()->FullDimensions();
 
     assert(dims.size()==4);
 

lib/parallelIO/MetaData.h

@@ -167,7 +167,7 @@ inline void MachineCharacteristics(FieldMetaData &header)
 
 template<class vobj> inline void PrepareMetaData(Lattice<vobj> & field, FieldMetaData &header)
 {
-  GridBase *grid = field._grid;
+  GridBase *grid = field.Grid();
   std::string format = getFormatString<vobj>();
   header.floating_point = format;
   header.checksum = 0x0; // Nersc checksum unused in ILDG, Scidac
@@ -189,7 +189,7 @@ inline void GaugeStatistics(Lattice<vLorentzColourMatrixD> & data,FieldMetaData
 template<> inline void PrepareMetaData<vLorentzColourMatrixF>(Lattice<vLorentzColourMatrixF> & field, FieldMetaData &header)
 {
    
-  GridBase *grid = field._grid;
+  GridBase *grid = field.Grid();
   std::string format = getFormatString<vLorentzColourMatrixF>();
   header.floating_point = format;
   header.checksum = 0x0; // Nersc checksum unused in ILDG, Scidac
@@ -199,7 +199,7 @@ template<> inline void PrepareMetaData<vLorentzColourMatrixF>(Lattice<vLorentzCo
 }
 template<> inline void PrepareMetaData<vLorentzColourMatrixD>(Lattice<vLorentzColourMatrixD> & field, FieldMetaData &header)
 {
-  GridBase *grid = field._grid;
+  GridBase *grid = field.Grid();
   std::string format = getFormatString<vLorentzColourMatrixD>();
   header.floating_point = format;
   header.checksum = 0x0; // Nersc checksum unused in ILDG, Scidac

lib/parallelIO/NerscIO.h

@@ -136,7 +136,7 @@ public:
   {
     typedef Lattice<iLorentzColourMatrix<vsimd> > GaugeField;
 
-    GridBase *grid = Umu._grid;
+    GridBase *grid = Umu.Grid();
     int offset = readHeader(file,grid,header);
 
     FieldMetaData clone(header);
@@ -227,7 +227,7 @@ public:
     typedef LorentzColourMatrixD fobj3D;
     typedef LorentzColour2x3D    fobj2D;
   
-    GridBase *grid = Umu._grid;
+    GridBase *grid = Umu.Grid();
 
     GridMetaData(grid,header);
     assert(header.nd==4);
@@ -268,7 +268,7 @@ public:
     header.ensemble_id     = "UKQCD";
     header.ensemble_label  = "DWF";
 
-    GridBase *grid = parallel._grid;
+    GridBase *grid = parallel.Grid();
 
     GridMetaData(grid,header);
     assert(header.nd==4);
@@ -309,7 +309,7 @@ public:
   {
     typedef typename GridParallelRNG::RngStateType RngStateType;
 
-    GridBase *grid = parallel._grid;
+    GridBase *grid = parallel.Grid();
 
     int offset = readHeader(file,grid,header);
 

lib/qcd/action/fermion/CayleyFermion5D.cc

@@ -238,7 +238,7 @@ void CayleyFermion5D<Impl>::MeooeDag5D    (const FermionField &psi, FermionField
 template<class Impl>
 RealD CayleyFermion5D<Impl>::M    (const FermionField &psi, FermionField &chi)
 {
-  FermionField Din(psi._grid);
+  FermionField Din(psi.Grid());
   
   // Assemble Din
   Meooe5D(psi,Din);
@@ -258,7 +258,7 @@ RealD CayleyFermion5D<Impl>::Mdag (const FermionField &psi, FermionField &chi)
   //D1+        D1- P-    ->   D1+^dag   P+ D2-^dag
   //D2- P+     D2+            P-D1-^dag D2+dag
   
-  FermionField Din(psi._grid);
+  FermionField Din(psi.Grid());
   // Apply Dw
   this->DW(psi,Din,DaggerYes); 
   
@@ -305,7 +305,7 @@ void  CayleyFermion5D<Impl>::Mdir (const FermionField &psi, FermionField &chi,in
 template<class Impl>
 void CayleyFermion5D<Impl>::MDeriv  (GaugeField &mat,const FermionField &U,const FermionField &V,int dag)
 {
-  FermionField Din(V._grid);
+  FermionField Din(V.Grid());
   
   if ( dag == DaggerNo ) {
     //      U d/du [D_w D5] V = U d/du DW D5 V
@@ -320,7 +320,7 @@ void CayleyFermion5D<Impl>::MDeriv  (GaugeField &mat,const FermionField &U,const
 template<class Impl>
 void CayleyFermion5D<Impl>::MoeDeriv(GaugeField &mat,const FermionField &U,const FermionField &V,int dag)
 {
-  FermionField Din(V._grid);
+  FermionField Din(V.Grid());
   
   if ( dag == DaggerNo ) {
     //      U d/du [D_w D5] V = U d/du DW D5 V
@@ -335,7 +335,7 @@ void CayleyFermion5D<Impl>::MoeDeriv(GaugeField &mat,const FermionField &U,const
 template<class Impl>
 void CayleyFermion5D<Impl>::MeoDeriv(GaugeField &mat,const FermionField &U,const FermionField &V,int dag)
 {
-  FermionField Din(V._grid);
+  FermionField Din(V.Grid());
   
   if ( dag == DaggerNo ) {
     //      U d/du [D_w D5] V = U d/du DW D5 V

lib/qcd/action/fermion/CayleyFermion5Dcache.cc

@@ -46,7 +46,7 @@ void CayleyFermion5D<Impl>::M5D(const FermionField &psi,
 				std::vector<Coeff_t> &upper)
 {
   int Ls =this->Ls;
-  GridBase *grid=psi._grid;
+  GridBase *grid=psi.Grid();
   assert(phi.Checkerboard() == psi.Checkerboard());
   chi.Checkerboard()=psi.Checkerboard();
   // Flops = 6.0*(Nc*Ns) *Ls*vol
@@ -89,7 +89,7 @@ void CayleyFermion5D<Impl>::M5Ddag(const FermionField &psi,
 				   std::vector<Coeff_t> &upper)
 {
   int Ls =this->Ls;
-  GridBase *grid=psi._grid;
+  GridBase *grid=psi.Grid();
   assert(phi.Checkerboard() == psi.Checkerboard());
   chi.Checkerboard()=psi.Checkerboard();
 
@@ -127,7 +127,7 @@ void CayleyFermion5D<Impl>::M5Ddag(const FermionField &psi,
 template<class Impl>
 void CayleyFermion5D<Impl>::MooeeInv    (const FermionField &psi, FermionField &chi)
 {
-  GridBase *grid=psi._grid;
+  GridBase *grid=psi.Grid();
   int Ls=this->Ls;
 
   chi.Checkerboard()=psi.Checkerboard();
@@ -172,7 +172,7 @@ void CayleyFermion5D<Impl>::MooeeInv    (const FermionField &psi, FermionField &
 template<class Impl>
 void CayleyFermion5D<Impl>::MooeeInvDag (const FermionField &psi, FermionField &chi)
 {
-  GridBase *grid=psi._grid;
+  GridBase *grid=psi.Grid();
   int Ls=this->Ls;
 
   assert(psi.Checkerboard() == psi.Checkerboard());

lib/qcd/action/fermion/CayleyFermion5Ddense.cc

@@ -54,8 +54,8 @@ template<class Impl>
 void CayleyFermion5D<Impl>::MooeeInternal(const FermionField &psi, FermionField &chi,int dag, int inv)
 {
   int Ls=this->Ls;
-  int LLs = psi._grid->_rdimensions[0];
+  int LLs = psi.Grid()->_rdimensions[0];
-  int vol = psi._grid->oSites()/LLs;
+  int vol = psi.Grid()->oSites()/LLs;
   
   chi.Checkerboard()=psi.Checkerboard();
   

lib/qcd/action/fermion/CayleyFermion5Dvec.cc

@@ -58,7 +58,7 @@ void CayleyFermion5D<Impl>::M5D(const FermionField &psi,
 				std::vector<Coeff_t> &diag,
 				std::vector<Coeff_t> &upper)
 {
-  GridBase *grid=psi._grid;
+  GridBase *grid=psi.Grid();
   int Ls   = this->Ls;
   int LLs  = grid->_rdimensions[0];
   const int nsimd= Simd::Nsimd();
@@ -202,7 +202,7 @@ void CayleyFermion5D<Impl>::M5Ddag(const FermionField &psi,
 				   std::vector<Coeff_t> &diag,
 				   std::vector<Coeff_t> &upper)
 {
-  GridBase *grid=psi._grid;
+  GridBase *grid=psi.Grid();
   int Ls   = this->Ls;
   int LLs  = grid->_rdimensions[0];
   int nsimd= Simd::Nsimd();
@@ -762,8 +762,8 @@ template<class Impl>
 void CayleyFermion5D<Impl>::MooeeInternal(const FermionField &psi, FermionField &chi,int dag, int inv)
 {
   int Ls=this->Ls;
-  int LLs = psi._grid->_rdimensions[0];
+  int LLs = psi.Grid()->_rdimensions[0];
-  int vol = psi._grid->oSites()/LLs;
+  int vol = psi.Grid()->oSites()/LLs;
 
   chi.Checkerboard()=psi.Checkerboard();
   

lib/qcd/action/fermion/ContinuedFractionFermion5D.cc

@@ -96,7 +96,7 @@ RealD  ContinuedFractionFermion5D<Impl>::M           (const FermionField &psi, F
 {
   int Ls = this->Ls;
 
-  FermionField D(psi._grid);
+  FermionField D(psi.Grid());
 
   this->DW(psi,D,DaggerNo); 
 
@@ -226,7 +226,7 @@ void ContinuedFractionFermion5D<Impl>::MDeriv  (GaugeField &mat,const FermionFie
 {
   int Ls = this->Ls;
 
-  FermionField D(V._grid);
+  FermionField D(V.Grid());
 
   int sign=1;
   for(int s=0;s<Ls;s++){
@@ -244,7 +244,7 @@ void ContinuedFractionFermion5D<Impl>::MoeDeriv(GaugeField &mat,const FermionFie
 {
   int Ls = this->Ls;
 
-  FermionField D(V._grid);
+  FermionField D(V.Grid());
 
   int sign=1;
   for(int s=0;s<Ls;s++){
@@ -262,7 +262,7 @@ void ContinuedFractionFermion5D<Impl>::MeoDeriv(GaugeField &mat,const FermionFie
 {
   int Ls = this->Ls;
 
-  FermionField D(V._grid);
+  FermionField D(V.Grid());
 
   int sign=1;
   for(int s=0;s<Ls;s++){

lib/qcd/action/fermion/DomainWallEOFAFermion.cc

@@ -89,7 +89,7 @@ void DomainWallEOFAFermion<Impl>::DtildeInv(const FermionField& psi, FermionFiel
 template<class Impl>
 RealD DomainWallEOFAFermion<Impl>::M(const FermionField& psi, FermionField& chi)
 {
-  FermionField Din(psi._grid);
+  FermionField Din(psi.Grid());
 
   this->Meooe5D(psi, Din);
   this->DW(Din, chi, DaggerNo);
@@ -101,7 +101,7 @@ RealD DomainWallEOFAFermion<Impl>::M(const FermionField& psi, FermionField& chi)
 template<class Impl>
 RealD DomainWallEOFAFermion<Impl>::Mdag(const FermionField& psi, FermionField& chi)
 {
-  FermionField Din(psi._grid);
+  FermionField Din(psi.Grid());
 
   this->DW(psi, Din, DaggerYes);
   this->MeooeDag5D(Din, chi);

lib/qcd/action/fermion/DomainWallEOFAFermioncache.cc

@@ -44,7 +44,7 @@ void DomainWallEOFAFermion<Impl>::M5D(const FermionField& psi, const FermionFiel
 				      FermionField& chi, std::vector<Coeff_t>& lower, std::vector<Coeff_t>& diag, std::vector<Coeff_t>& upper)
 {
   int Ls = this->Ls;
-  GridBase* grid = psi._grid;
+  GridBase* grid = psi.Grid();
 
   assert(phi.Checkerboard() == psi.Checkerboard());
   chi.Checkerboard() = psi.Checkerboard();
@@ -82,7 +82,7 @@ void DomainWallEOFAFermion<Impl>::M5Ddag(const FermionField& psi, const FermionF
 					 FermionField& chi, std::vector<Coeff_t>& lower, std::vector<Coeff_t>& diag, std::vector<Coeff_t>& upper)
 {
   int Ls = this->Ls;
-  GridBase* grid = psi._grid;
+  GridBase* grid = psi.Grid();
   assert(phi.Checkerboard() == psi.Checkerboard());
   chi.Checkerboard()=psi.Checkerboard();
 
@@ -118,7 +118,7 @@ void DomainWallEOFAFermion<Impl>::M5Ddag(const FermionField& psi, const FermionF
 template<class Impl>
 void DomainWallEOFAFermion<Impl>::MooeeInv(const FermionField& psi, FermionField& chi)
 {
-  GridBase* grid = psi._grid;
+  GridBase* grid = psi.Grid();
   int Ls = this->Ls;
 
   chi.Checkerboard() = psi.Checkerboard();
@@ -166,7 +166,7 @@ void DomainWallEOFAFermion<Impl>::MooeeInv(const FermionField& psi, FermionField
 template<class Impl>
 void DomainWallEOFAFermion<Impl>::MooeeInvDag(const FermionField& psi, FermionField& chi)
 {
-  GridBase* grid = psi._grid;
+  GridBase* grid = psi.Grid();
   int Ls = this->Ls;
 
   assert(psi.Checkerboard() == psi.Checkerboard());

lib/qcd/action/fermion/DomainWallEOFAFermiondense.cc

@@ -55,8 +55,8 @@ template<class Impl>
 void DomainWallEOFAFermion<Impl>::MooeeInternal(const FermionField& psi, FermionField& chi, int dag, int inv)
 {
   int Ls = this->Ls;
-  int LLs = psi._grid->_rdimensions[0];
+  int LLs = psi.Grid()->_rdimensions[0];
-  int vol = psi._grid->oSites()/LLs;
+  int vol = psi.Grid()->oSites()/LLs;
 
   chi.Checkerboard() = psi.Checkerboard();
 

lib/qcd/action/fermion/DomainWallEOFAFermionssp.cc

@@ -86,7 +86,7 @@ void DomainWallEOFAFermion<Impl>::MooeeInv(const FermionField& psi, FermionField
   chi.Checkerboard() = psi.Checkerboard();
   int Ls = this->Ls;
 
-  FermionField tmp(psi._grid);
+  FermionField tmp(psi.Grid());
 
   // Apply (L^{\prime})^{-1}
   axpby_ssp(chi, one, psi, czero, psi, 0, 0);      // chi[0]=psi[0]
@@ -120,7 +120,7 @@ void DomainWallEOFAFermion<Impl>::MooeeInvDag(const FermionField& psi, FermionFi
   chi.Checkerboard() = psi.Checkerboard();
   int Ls = this->Ls;
 
-  FermionField tmp(psi._grid);
+  FermionField tmp(psi.Grid());
 
   // Apply (U^{\prime})^{-dagger}
   axpby_ssp(chi, one, psi, czero, psi, 0, 0);      // chi[0]=psi[0]

lib/qcd/action/fermion/DomainWallEOFAFermionvec.cc

@@ -55,7 +55,7 @@ template<class Impl>
 void DomainWallEOFAFermion<Impl>::M5D(const FermionField& psi, const FermionField& phi,
 				      FermionField& chi, std::vector<Coeff_t>& lower, std::vector<Coeff_t>& diag, std::vector<Coeff_t>& upper)
 {
-  GridBase* grid = psi._grid;
+  GridBase* grid = psi.Grid();
   int Ls  = this->Ls;
   int LLs = grid->_rdimensions[0];
   const int nsimd = Simd::Nsimd();
@@ -200,7 +200,7 @@ template<class Impl>
 void DomainWallEOFAFermion<Impl>::M5Ddag(const FermionField& psi, const FermionField& phi,
 					 FermionField& chi, std::vector<Coeff_t>& lower, std::vector<Coeff_t>& diag, std::vector<Coeff_t>& upper)
 {
-  GridBase* grid = psi._grid;
+  GridBase* grid = psi.Grid();
   int Ls  = this->Ls;
   int LLs = grid->_rdimensions[0];
   int nsimd = Simd::Nsimd();
@@ -533,8 +533,8 @@ template<class Impl>
 void DomainWallEOFAFermion<Impl>::MooeeInternal(const FermionField& psi, FermionField& chi, int dag, int inv)
 {
   int Ls  = this->Ls;
-  int LLs = psi._grid->_rdimensions[0];
+  int LLs = psi.Grid()->_rdimensions[0];
-  int vol = psi._grid->oSites()/LLs;
+  int vol = psi.Grid()->oSites()/LLs;
 
   chi.Checkerboard() = psi.Checkerboard();
 

lib/qcd/action/fermion/FermionOperator.h

@@ -96,10 +96,10 @@ public:
   virtual void  MomentumSpacePropagator(FermionField &out,const FermionField &in,RealD _m) { assert(0);};
 
   virtual void  FreePropagator(const FermionField &in,FermionField &out,RealD mass) { 
-    FFT theFFT((GridCartesian *) in._grid);
+    FFT theFFT((GridCartesian *) in.Grid());
 
-    FermionField in_k(in._grid);
+    FermionField in_k(in.Grid());
-    FermionField prop_k(in._grid);
+    FermionField prop_k(in.Grid());
 
     theFFT.FFT_all_dim(in_k,in,FFT::forward);
     this->MomentumSpacePropagator(prop_k,in_k,mass);

lib/qcd/action/fermion/FermionOperatorImpl.h

@@ -230,8 +230,8 @@ public:
   {
     typedef typename Simd::scalar_type scalar_type;
 
-    conformable(Uds._grid, GaugeGrid);
+    conformable(Uds.Grid(), GaugeGrid);
-    conformable(Umu._grid, GaugeGrid);
+    conformable(Umu.Grid(), GaugeGrid);
 
     GaugeLinkField U(GaugeGrid);
     GaugeLinkField tmp(GaugeGrid);
@@ -257,18 +257,18 @@ public:
   }
 
   inline void InsertForce4D(GaugeField &mat, FermionField &Btilde, FermionField &A,int mu){
-    GaugeLinkField link(mat._grid);
+    GaugeLinkField link(mat.Grid());
     link = TraceIndex<SpinIndex>(outerProduct(Btilde,A)); 
     PokeIndex<LorentzIndex>(mat,link,mu);
   }   
       
   inline void InsertForce5D(GaugeField &mat, FermionField &Btilde, FermionField &Atilde,int mu){
       
-    int Ls=Btilde._grid->_fdimensions[0];
+    int Ls=Btilde.Grid()->_fdimensions[0];
-    GaugeLinkField tmp(mat._grid);
+    GaugeLinkField tmp(mat.Grid());
     tmp = zero;
       
-    parallel_for(int sss=0;sss<tmp._grid->oSites();sss++){
+    parallel_for(int sss=0;sss<tmp.Grid()->oSites();sss++){
       int sU=sss;
       for(int s=0;s<Ls;s++){
 	int sF = s+Ls*sU;
@@ -365,8 +365,8 @@ public:
     SiteScalarGaugeField  ScalarUmu;
     SiteDoubledGaugeField ScalarUds;
     
-    GaugeLinkField U(Umu._grid);
+    GaugeLinkField U(Umu.Grid());
-    GaugeField  Uadj(Umu._grid);
+    GaugeField  Uadj(Umu.Grid());
     for (int mu = 0; mu < Nd; mu++) {
       U = PeekIndex<LorentzIndex>(Umu, mu);
       U = adj(Cshift(U, mu, -1));
@@ -399,10 +399,10 @@ public:
     // missing put lane...
     /*
       typedef decltype(traceIndex<SpinIndex>(outerProduct(Btilde[0], Atilde[0]))) result_type;
-      unsigned int LLs = Btilde._grid->_rdimensions[0];
+      unsigned int LLs = Btilde.Grid()->_rdimensions[0];
-      conformable(Atilde._grid,Btilde._grid);
+      conformable(Atilde.Grid(),Btilde.Grid());
-      GridBase* grid = mat._grid;
+      GridBase* grid = mat.Grid();
-      GridBase* Bgrid = Btilde._grid;
+      GridBase* Bgrid = Btilde.Grid();
       unsigned int dimU = grid->Nd();
       unsigned int dimF = Bgrid->Nd();
       GaugeLinkField tmp(grid); 
@@ -416,7 +416,7 @@ public:
       for (int so = 0; so < grid->oSites(); so++) {
       std::vector<typename result_type::scalar_object> vres(Bgrid->Nsimd());
       std::vector<int> ocoor;  grid->oCoorFromOindex(ocoor,so); 
-      for (int si = 0; si < tmp._grid->iSites(); si++){
+      for (int si = 0; si < tmp.Grid()->iSites(); si++){
       typename result_type::scalar_object scalar_object; scalar_object = zero;
       std::vector<int> local_coor;      
       std::vector<int> icoor; grid->iCoorFromIindex(icoor,si);
@@ -496,14 +496,14 @@ public:
     vobj vtmp;
     sobj stmp;
         
-    GridBase *grid = St._grid;
+    GridBase *grid = St.Grid();
         
     const int Nsimd = grid->Nsimd();
         
     int direction = St._directions[mu];
     int distance = St._distances[mu];
     int ptype = St._permute_type[mu];
-    int sl = St._grid->_simd_layout[direction];
+    int sl = St.Grid()->_simd_layout[direction];
    
     // Fixme X.Y.Z.T hardcode in stencil
     int mmu = mu % Nd;
@@ -569,8 +569,8 @@ public:
 
   inline void DoubleStore(GridBase *GaugeGrid,DoubledGaugeField &Uds,const GaugeField &Umu)
   {
-    conformable(Uds._grid,GaugeGrid);
+    conformable(Uds.Grid(),GaugeGrid);
-    conformable(Umu._grid,GaugeGrid);
+    conformable(Umu.Grid(),GaugeGrid);
    
     GaugeLinkField Utmp (GaugeGrid);
     GaugeLinkField U    (GaugeGrid);
@@ -624,7 +624,7 @@ public:
   inline void InsertForce4D(GaugeField &mat, FermionField &Btilde, FermionField &A, int mu) {
 
     // DhopDir provides U or Uconj depending on coor/flavour.
-    GaugeLinkField link(mat._grid);
+    GaugeLinkField link(mat.Grid());
     // use lorentz for flavour as hack.
     auto tmp = TraceIndex<SpinIndex>(outerProduct(Btilde, A));
     parallel_for(auto ss = tmp.begin(); ss < tmp.end(); ss++) {
@@ -636,11 +636,11 @@ public:
       
   inline void InsertForce5D(GaugeField &mat, FermionField &Btilde, FermionField &Atilde, int mu) {
 
-    int Ls = Btilde._grid->_fdimensions[0];
+    int Ls = Btilde.Grid()->_fdimensions[0];
         
-    GaugeLinkField tmp(mat._grid);
+    GaugeLinkField tmp(mat.Grid());
     tmp = zero;
-    parallel_for(int ss = 0; ss < tmp._grid->oSites(); ss++) {
+    parallel_for(int ss = 0; ss < tmp.Grid()->oSites(); ss++) {
       for (int s = 0; s < Ls; s++) {
 	int sF = s + Ls * ss;
 	auto ttmp = traceIndex<SpinIndex>(outerProduct(Btilde[sF], Atilde[sF]));
@@ -718,9 +718,9 @@ public:
 			  DoubledGaugeField &Uds,
 			  const GaugeField &Uthin,
 			  const GaugeField &Ufat) {
-    conformable(Uds._grid, GaugeGrid);
+    conformable(Uds.Grid(), GaugeGrid);
-    conformable(Uthin._grid, GaugeGrid);
+    conformable(Uthin.Grid(), GaugeGrid);
-    conformable(Ufat._grid, GaugeGrid);
+    conformable(Ufat.Grid(), GaugeGrid);
     GaugeLinkField U(GaugeGrid);
     GaugeLinkField UU(GaugeGrid);
     GaugeLinkField UUU(GaugeGrid);
@@ -771,7 +771,7 @@ public:
   }
 
   inline void InsertForce4D(GaugeField &mat, FermionField &Btilde, FermionField &A,int mu){
-    GaugeLinkField link(mat._grid);
+    GaugeLinkField link(mat.Grid());
     link = TraceIndex<SpinIndex>(outerProduct(Btilde,A)); 
     PokeIndex<LorentzIndex>(mat,link,mu);
   }   
@@ -864,8 +864,8 @@ public:
 			  const GaugeField &Ufat) 
   {
 
-    GridBase * InputGrid = Uthin._grid;
+    GridBase * InputGrid = Uthin.Grid();
-    conformable(InputGrid,Ufat._grid);
+    conformable(InputGrid,Ufat.Grid());
 
     GaugeLinkField U(InputGrid);
     GaugeLinkField UU(InputGrid);

lib/qcd/action/fermion/ImprovedStaggeredFermion.cc

@@ -238,8 +238,8 @@ void ImprovedStaggeredFermion<Impl>::DerivInternal(StencilImpl &st, DoubledGauge
 
   Compressor compressor;
 
-  FermionField Btilde(B._grid);
+  FermionField Btilde(B.Grid());
-  FermionField Atilde(B._grid);
+  FermionField Atilde(B.Grid());
   Atilde = A;
 
   st.HaloExchange(B, compressor);
@@ -249,7 +249,7 @@ void ImprovedStaggeredFermion<Impl>::DerivInternal(StencilImpl &st, DoubledGauge
     ////////////////////////
     // Call the single hop
     ////////////////////////
-    thread_loop( (int sss = 0; sss < B._grid->oSites(); sss++), {
+    thread_loop( (int sss = 0; sss < B.Grid()->oSites(); sss++), {
 	Kernels::DhopDirK(st, U, UUU, st.CommBuf(), sss, sss, B, Btilde, mu,1);
     });
 
@@ -281,9 +281,9 @@ void ImprovedStaggeredFermion<Impl>::DerivInternal(StencilImpl &st, DoubledGauge
 template <class Impl>
 void ImprovedStaggeredFermion<Impl>::DhopDeriv(GaugeField &mat, const FermionField &U, const FermionField &V, int dag) {
 
-  conformable(U._grid, _grid);
+  conformable(U.Grid(), _grid);
-  conformable(U._grid, V._grid);
+  conformable(U.Grid(), V.Grid());
-  conformable(U._grid, mat._grid);
+  conformable(U.Grid(), mat.Grid());
 
   mat.Checkerboard() = U.Checkerboard();
 
@@ -293,9 +293,9 @@ void ImprovedStaggeredFermion<Impl>::DhopDeriv(GaugeField &mat, const FermionFie
 template <class Impl>
 void ImprovedStaggeredFermion<Impl>::DhopDerivOE(GaugeField &mat, const FermionField &U, const FermionField &V, int dag) {
 
-  conformable(U._grid, _cbgrid);
+  conformable(U.Grid(), _cbgrid);
-  conformable(U._grid, V._grid);
+  conformable(U.Grid(), V.Grid());
-  conformable(U._grid, mat._grid);
+  conformable(U.Grid(), mat.Grid());
 
   assert(V.Checkerboard() == Even);
   assert(U.Checkerboard() == Odd);
@@ -307,9 +307,9 @@ void ImprovedStaggeredFermion<Impl>::DhopDerivOE(GaugeField &mat, const FermionF
 template <class Impl>
 void ImprovedStaggeredFermion<Impl>::DhopDerivEO(GaugeField &mat, const FermionField &U, const FermionField &V, int dag) {
 
-  conformable(U._grid, _cbgrid);
+  conformable(U.Grid(), _cbgrid);
-  conformable(U._grid, V._grid);
+  conformable(U.Grid(), V.Grid());
-  conformable(U._grid, mat._grid);
+  conformable(U.Grid(), mat.Grid());
 
   assert(V.Checkerboard() == Odd);
   assert(U.Checkerboard() == Even);
@@ -320,8 +320,8 @@ void ImprovedStaggeredFermion<Impl>::DhopDerivEO(GaugeField &mat, const FermionF
 
 template <class Impl>
 void ImprovedStaggeredFermion<Impl>::Dhop(const FermionField &in, FermionField &out, int dag) {
-  conformable(in._grid, _grid);  // verifies full grid
+  conformable(in.Grid(), _grid);  // verifies full grid
-  conformable(in._grid, out._grid);
+  conformable(in.Grid(), out.Grid());
 
   out.Checkerboard() = in.Checkerboard();
 
@@ -330,8 +330,8 @@ void ImprovedStaggeredFermion<Impl>::Dhop(const FermionField &in, FermionField &
 
 template <class Impl>
 void ImprovedStaggeredFermion<Impl>::DhopOE(const FermionField &in, FermionField &out, int dag) {
-  conformable(in._grid, _cbgrid);    // verifies half grid
+  conformable(in.Grid(), _cbgrid);    // verifies half grid
-  conformable(in._grid, out._grid);  // drops the cb check
+  conformable(in.Grid(), out.Grid());  // drops the cb check
 
   assert(in.Checkerboard() == Even);
   out.Checkerboard() = Odd;
@@ -341,8 +341,8 @@ void ImprovedStaggeredFermion<Impl>::DhopOE(const FermionField &in, FermionField
 
 template <class Impl>
 void ImprovedStaggeredFermion<Impl>::DhopEO(const FermionField &in, FermionField &out, int dag) {
-  conformable(in._grid, _cbgrid);    // verifies half grid
+  conformable(in.Grid(), _cbgrid);    // verifies half grid
-  conformable(in._grid, out._grid);  // drops the cb check
+  conformable(in.Grid(), out.Grid());  // drops the cb check
 
   assert(in.Checkerboard() == Odd);
   out.Checkerboard() = Even;
@@ -361,7 +361,7 @@ void ImprovedStaggeredFermion<Impl>::DhopDir(const FermionField &in, FermionFiel
   Compressor compressor;
   Stencil.HaloExchange(in, compressor);
 
-  thread_loop( (int sss = 0; sss < in._grid->oSites(); sss++) , {
+  thread_loop( (int sss = 0; sss < in.Grid()->oSites(); sss++) , {
       Kernels::DhopDirK(Stencil, Umu, UUUmu, Stencil.CommBuf(), sss, sss, in, out, dir, disp);
   });
 };
@@ -378,11 +378,11 @@ void ImprovedStaggeredFermion<Impl>::DhopInternal(StencilImpl &st, LebesgueOrder
   st.HaloExchange(in, compressor);
 
   if (dag == DaggerYes) {
-    thread_loop( (int sss = 0; sss < in._grid->oSites(); sss++), {
+    thread_loop( (int sss = 0; sss < in.Grid()->oSites(); sss++), {
 	Kernels::DhopSiteDag(st, lo, U, UUU, st.CommBuf(), 1, sss, in, out);
     });
   } else {
-    thread_loop( (int sss = 0; sss < in._grid->oSites(); sss++), {
+    thread_loop( (int sss = 0; sss < in.Grid()->oSites(); sss++), {
 	Kernels::DhopSite(st, lo, U, UUU, st.CommBuf(), 1, sss, in, out);
     });
   }

lib/qcd/action/fermion/ImprovedStaggeredFermion5D.cc

@@ -172,7 +172,7 @@ void ImprovedStaggeredFermion5D<Impl>::DhopDir(const FermionField &in, FermionFi
   Compressor compressor;
   Stencil.HaloExchange(in,compressor);
 
-  parallel_for(int ss=0;ss<Umu._grid->oSites();ss++){
+  parallel_for(int ss=0;ss<Umu.Grid()->oSites();ss++){
     for(int s=0;s<Ls;s++){
       int sU=ss;
       int sF = s+Ls*sU; 
@@ -228,7 +228,7 @@ void ImprovedStaggeredFermion5D<Impl>::DhopInternal(StencilImpl & st, LebesgueOr
 						    const FermionField &in, FermionField &out,int dag)
 {
   Compressor compressor;
-  int LLs = in._grid->_rdimensions[0];
+  int LLs = in.Grid()->_rdimensions[0];
 
 
 
@@ -240,12 +240,12 @@ void ImprovedStaggeredFermion5D<Impl>::DhopInternal(StencilImpl & st, LebesgueOr
   DhopComputeTime -= usecond();
   // Dhop takes the 4d grid from U, and makes a 5d index for fermion
   if (dag == DaggerYes) {
-    parallel_for (int ss = 0; ss < U._grid->oSites(); ss++) {
+    parallel_for (int ss = 0; ss < U.Grid()->oSites(); ss++) {
       int sU=ss;
       Kernels::DhopSiteDag(st, lo, U, UUU, st.CommBuf(), LLs, sU,in, out);
     }
   } else {
-    parallel_for (int ss = 0; ss < U._grid->oSites(); ss++) {
+    parallel_for (int ss = 0; ss < U.Grid()->oSites(); ss++) {
       int sU=ss;
       Kernels::DhopSite(st,lo,U,UUU,st.CommBuf(),LLs,sU,in,out);
     }
@@ -259,8 +259,8 @@ template<class Impl>
 void ImprovedStaggeredFermion5D<Impl>::DhopOE(const FermionField &in, FermionField &out,int dag)
 {
   DhopCalls+=1;
-  conformable(in._grid,FermionRedBlackGrid());    // verifies half grid
+  conformable(in.Grid(),FermionRedBlackGrid());    // verifies half grid
-  conformable(in._grid,out._grid); // drops the cb check
+  conformable(in.Grid(),out.Grid()); // drops the cb check
 
   assert(in.Checkerboard()==Even);
   out.Checkerboard() = Odd;
@@ -271,8 +271,8 @@ template<class Impl>
 void ImprovedStaggeredFermion5D<Impl>::DhopEO(const FermionField &in, FermionField &out,int dag)
 {
   DhopCalls+=1;
-  conformable(in._grid,FermionRedBlackGrid());    // verifies half grid
+  conformable(in.Grid(),FermionRedBlackGrid());    // verifies half grid
-  conformable(in._grid,out._grid); // drops the cb check
+  conformable(in.Grid(),out.Grid()); // drops the cb check
 
   assert(in.Checkerboard()==Odd);
   out.Checkerboard() = Even;
@@ -283,8 +283,8 @@ template<class Impl>
 void ImprovedStaggeredFermion5D<Impl>::Dhop(const FermionField &in, FermionField &out,int dag)
 {
   DhopCalls+=2;
-  conformable(in._grid,FermionGrid()); // verifies full grid
+  conformable(in.Grid(),FermionGrid()); // verifies full grid
-  conformable(in._grid,out._grid);
+  conformable(in.Grid(),out.Grid());
 
   out.Checkerboard() = in.Checkerboard();
 

lib/qcd/action/fermion/MobiusEOFAFermion.cc

@@ -167,7 +167,7 @@ void MobiusEOFAFermion<Impl>::DtildeInv(const FermionField& psi, FermionField& c
 template<class Impl>
 RealD MobiusEOFAFermion<Impl>::M(const FermionField& psi, FermionField& chi)
 {
-  FermionField Din(psi._grid);
+  FermionField Din(psi.Grid());
 
   this->Meooe5D(psi, Din);
   this->DW(Din, chi, DaggerNo);
@@ -179,7 +179,7 @@ RealD MobiusEOFAFermion<Impl>::M(const FermionField& psi, FermionField& chi)
 template<class Impl>
 RealD MobiusEOFAFermion<Impl>::Mdag(const FermionField& psi, FermionField& chi)
 {
-  FermionField Din(psi._grid);
+  FermionField Din(psi.Grid());
 
   this->DW(psi, Din, DaggerYes);
   this->MeooeDag5D(Din, chi);

lib/qcd/action/fermion/MobiusEOFAFermioncache.cc

@@ -41,7 +41,7 @@ void MobiusEOFAFermion<Impl>::M5D(const FermionField &psi, const FermionField &p
 				  std::vector<Coeff_t> &lower, std::vector<Coeff_t> &diag, std::vector<Coeff_t> &upper)
 {
   int Ls = this->Ls;
-  GridBase *grid = psi._grid;
+  GridBase *grid = psi.Grid();
 
   assert(phi.Checkerboard() == psi.Checkerboard());
   chi.Checkerboard() = psi.Checkerboard();
@@ -82,7 +82,7 @@ void MobiusEOFAFermion<Impl>::M5D_shift(const FermionField &psi, const FermionFi
 {
   int Ls = this->Ls;
   int shift_s = (this->pm == 1) ? (Ls-1) : 0; // s-component modified by shift operator
-  GridBase *grid = psi._grid;
+  GridBase *grid = psi.Grid();
 
   assert(phi.Checkerboard() == psi.Checkerboard());
   chi.Checkerboard() = psi.Checkerboard();
@@ -124,7 +124,7 @@ void MobiusEOFAFermion<Impl>::M5Ddag(const FermionField &psi, const FermionField
 				     std::vector<Coeff_t> &lower, std::vector<Coeff_t> &diag, std::vector<Coeff_t> &upper)
 {
   int Ls = this->Ls;
-  GridBase *grid = psi._grid;
+  GridBase *grid = psi.Grid();
 
   assert(phi.Checkerboard() == psi.Checkerboard());
   chi.Checkerboard() = psi.Checkerboard();
@@ -165,7 +165,7 @@ void MobiusEOFAFermion<Impl>::M5Ddag_shift(const FermionField &psi, const Fermio
 {
   int Ls = this->Ls;
   int shift_s = (this->pm == 1) ? (Ls-1) : 0; // s-component modified by shift operator
-  GridBase *grid = psi._grid;
+  GridBase *grid = psi.Grid();
 
   assert(phi.Checkerboard() == psi.Checkerboard());
   chi.Checkerboard() = psi.Checkerboard();
@@ -208,7 +208,7 @@ void MobiusEOFAFermion<Impl>::MooeeInv(const FermionField &psi, FermionField &ch
 {
   if(this->shift != 0.0){ MooeeInv_shift(psi,chi); return; }
 
-  GridBase *grid = psi._grid;
+  GridBase *grid = psi.Grid();
   int Ls = this->Ls;
 
   chi.Checkerboard() = psi.Checkerboard();
@@ -253,7 +253,7 @@ void MobiusEOFAFermion<Impl>::MooeeInv(const FermionField &psi, FermionField &ch
 template<class Impl>
 void MobiusEOFAFermion<Impl>::MooeeInv_shift(const FermionField &psi, FermionField &chi)
 {
-  GridBase *grid = psi._grid;
+  GridBase *grid = psi.Grid();
   int Ls = this->Ls;
 
   chi.Checkerboard() = psi.Checkerboard();
@@ -310,7 +310,7 @@ void MobiusEOFAFermion<Impl>::MooeeInvDag(const FermionField &psi, FermionField
 {
   if(this->shift != 0.0){ MooeeInvDag_shift(psi,chi); return; }
 
-  GridBase *grid = psi._grid;
+  GridBase *grid = psi.Grid();
   int Ls = this->Ls;
 
   chi.Checkerboard() = psi.Checkerboard();
@@ -355,7 +355,7 @@ void MobiusEOFAFermion<Impl>::MooeeInvDag(const FermionField &psi, FermionField
 template<class Impl>
 void MobiusEOFAFermion<Impl>::MooeeInvDag_shift(const FermionField &psi, FermionField &chi)
 {
-  GridBase *grid = psi._grid;
+  GridBase *grid = psi.Grid();
   int Ls = this->Ls;
 
   chi.Checkerboard() = psi.Checkerboard();

lib/qcd/action/fermion/MobiusEOFAFermiondense.cc

@@ -67,8 +67,8 @@ template<class Impl>
 void MobiusEOFAFermion<Impl>::MooeeInternal(const FermionField& psi, FermionField& chi, int dag, int inv)
 {
   int Ls = this->Ls;
-  int LLs = psi._grid->_rdimensions[0];
+  int LLs = psi.Grid()->_rdimensions[0];
-  int vol = psi._grid->oSites()/LLs;
+  int vol = psi.Grid()->oSites()/LLs;
 
   int pm      = this->pm;
   RealD shift = this->shift;

lib/qcd/action/fermion/MobiusEOFAFermionssp.cc

@@ -165,7 +165,7 @@ void MobiusEOFAFermion<Impl>::MooeeInv_shift(const FermionField& psi, FermionFie
   chi.Checkerboard() = psi.Checkerboard();
   int Ls = this->Ls;
 
-  FermionField tmp(psi._grid);
+  FermionField tmp(psi.Grid());
 
   // Apply (L^{\prime})^{-1}
   axpby_ssp(chi, one, psi, czero, psi, 0, 0);      // chi[0]=psi[0]
@@ -237,7 +237,7 @@ void MobiusEOFAFermion<Impl>::MooeeInvDag_shift(const FermionField& psi, Fermion
   chi.Checkerboard() = psi.Checkerboard();
   int Ls = this->Ls;
 
-  FermionField tmp(psi._grid);
+  FermionField tmp(psi.Grid());
 
   // Apply (U^{\prime})^{-dagger} and accumulate (MooeeInvDag_shift_lc)_{j} \psi_{j} in tmp[0]
   axpby_ssp(chi, one, psi, czero, psi, 0, 0);      // chi[0]=psi[0]

lib/qcd/action/fermion/MobiusEOFAFermionvec.cc

@@ -66,7 +66,7 @@ template<class Impl>
 void MobiusEOFAFermion<Impl>::M5D(const FermionField& psi, const FermionField& phi,
 				  FermionField& chi, std::vector<Coeff_t>& lower, std::vector<Coeff_t>& diag, std::vector<Coeff_t>& upper)
 {
-  GridBase* grid  = psi._grid;
+  GridBase* grid  = psi.Grid();
   int Ls          = this->Ls;
   int LLs         = grid->_rdimensions[0];
   const int nsimd = Simd::Nsimd();
@@ -226,7 +226,7 @@ void MobiusEOFAFermion<Impl>::M5D_shift(const FermionField& psi, const FermionFi
 
 #else
 
-  GridBase* grid  = psi._grid;
+  GridBase* grid  = psi.Grid();
   int Ls          = this->Ls;
   int LLs         = grid->_rdimensions[0];
   const int nsimd = Simd::Nsimd();
@@ -392,7 +392,7 @@ template<class Impl>
 void MobiusEOFAFermion<Impl>::M5Ddag(const FermionField& psi, const FermionField& phi,
 				     FermionField& chi, std::vector<Coeff_t>& lower, std::vector<Coeff_t>& diag, std::vector<Coeff_t>& upper)
 {
-  GridBase* grid = psi._grid;
+  GridBase* grid = psi.Grid();
   int Ls  = this->Ls;
   int LLs = grid->_rdimensions[0];
   int nsimd = Simd::Nsimd();
@@ -549,7 +549,7 @@ void MobiusEOFAFermion<Impl>::M5Ddag_shift(const FermionField& psi, const Fermio
 
 #else
 
-  GridBase* grid = psi._grid;
+  GridBase* grid = psi.Grid();
   int Ls  = this->Ls;
   int LLs = grid->_rdimensions[0];
   int nsimd = Simd::Nsimd();
@@ -910,8 +910,8 @@ template<class Impl>
 void MobiusEOFAFermion<Impl>::MooeeInternal(const FermionField& psi, FermionField& chi, int dag, int inv)
 {
   int Ls  = this->Ls;
-  int LLs = psi._grid->_rdimensions[0];
+  int LLs = psi.Grid()->_rdimensions[0];
-  int vol = psi._grid->oSites()/LLs;
+  int vol = psi.Grid()->oSites()/LLs;
 
   chi.Checkerboard() = psi.Checkerboard();
 

lib/qcd/action/fermion/PartialFractionFermion5D.cc

@@ -105,7 +105,7 @@ void   PartialFractionFermion5D<Impl>::MooeeInv_internal(const FermionField &psi
   int sign = dag ? (-1) : 1;
   int Ls = this->Ls;
 
-  FermionField tmp(psi._grid);
+  FermionField tmp(psi.Grid());
       
   ///////////////////////////////////////////////////////////////////////////////////////
   //Linv
@@ -164,7 +164,7 @@ void   PartialFractionFermion5D<Impl>::MooeeInv_internal(const FermionField &psi
 template<class Impl>
 void   PartialFractionFermion5D<Impl>::M_internal(const FermionField &psi, FermionField &chi,int dag)
 {
-  FermionField D(psi._grid);
+  FermionField D(psi.Grid());
   
   int Ls = this->Ls;
   int sign = dag ? (-1) : 1;
@@ -303,7 +303,7 @@ void PartialFractionFermion5D<Impl>::MDeriv  (GaugeField &mat,const FermionField
 {
   int Ls = this->Ls;
 
-  FermionField D(V._grid);
+  FermionField D(V.Grid());
 
   int nblock=(Ls-1)/2;
   for(int b=0;b<nblock;b++){
@@ -320,7 +320,7 @@ void PartialFractionFermion5D<Impl>::MoeDeriv(GaugeField &mat,const FermionField
 {
   int Ls = this->Ls;
 
-  FermionField D(V._grid);
+  FermionField D(V.Grid());
 
   int nblock=(Ls-1)/2;
   for(int b=0;b<nblock;b++){
@@ -337,7 +337,7 @@ void PartialFractionFermion5D<Impl>::MeoDeriv(GaugeField &mat,const FermionField
 {
   int Ls = this->Ls;
 
-  FermionField D(V._grid);
+  FermionField D(V.Grid());
 
   int nblock=(Ls-1)/2;
   for(int b=0;b<nblock;b++){

lib/qcd/action/fermion/SchurDiagTwoKappa.h

@@ -50,7 +50,7 @@ public:
 
   template<typename vobj>
   void sscale(const Lattice<vobj>& in, Lattice<vobj>& out, Coeff_t* s) {
-    GridBase *grid=out._grid;
+    GridBase *grid=out.Grid();
     out.Checkerboard() = in.Checkerboard();
     assert(grid->_simd_layout[0] == 1); // should be fine for ZMobius for now
     int Ls = grid->_rdimensions[0];
@@ -81,7 +81,7 @@ public:
   SchurDiagTwoKappaOperator (Matrix &Mat): _S(Mat), _Mat(Mat) {};
 
   virtual  RealD Mpc      (const Field &in, Field &out) {
-    Field tmp(in._grid);
+    Field tmp(in.Grid());
 
     _S.MInv(in,out);
     _Mat.Mpc(out,tmp);
@@ -89,7 +89,7 @@ public:
 
   }
   virtual  RealD MpcDag   (const Field &in, Field &out){
-    Field tmp(in._grid);
+    Field tmp(in.Grid());
 
     _S.MDag(in,out);
     _Mat.MpcDag(out,tmp);

lib/qcd/action/fermion/WilsonCompressor.h

@@ -343,7 +343,7 @@ public:
     this->_grid->StencilBarrier();
     this->mpi3synctime_g+=usecond();
 
-    assert(source._grid==this->_grid);
+    assert(source.Grid()==this->_grid);
     this->halogtime-=usecond();
     
     this->u_comm_offset=0;

lib/qcd/action/fermion/WilsonFermion.cc

@@ -66,7 +66,7 @@ WilsonFermion<Impl>::WilsonFermion(GaugeField &_Umu, GridCartesian &Fgrid,
 
 template <class Impl>
 void WilsonFermion<Impl>::ImportGauge(const GaugeField &_Umu) {
-  GaugeField HUmu(_Umu._grid);
+  GaugeField HUmu(_Umu.Grid());
   HUmu = _Umu * (-0.5);
   Impl::DoubleStore(GaugeGrid(), Umu, HUmu);
   pickCheckerboard(Even, UmuEven, Umu);
@@ -141,7 +141,7 @@ void WilsonFermion<Impl>::MomentumSpacePropagator(FermionField &out, const Fermi
   typedef Lattice<iSinglet<vector_type> > LatComplex;
   
   // what type LatticeComplex 
-  conformable(_grid,out._grid);
+  conformable(_grid,out.Grid());
   
   Gamma::Algebra Gmu [] = {
     Gamma::Algebra::GammaX,
@@ -200,8 +200,8 @@ void WilsonFermion<Impl>::DerivInternal(StencilImpl &st, DoubledGaugeField &U,
 
   Compressor compressor(dag);
 
-  FermionField Btilde(B._grid);
+  FermionField Btilde(B.Grid());
-  FermionField Atilde(B._grid);
+  FermionField Atilde(B.Grid());
   Atilde = A;
 
   st.HaloExchange(B, compressor);
@@ -216,7 +216,7 @@ void WilsonFermion<Impl>::DerivInternal(StencilImpl &st, DoubledGaugeField &U,
     ////////////////////////
     // Call the single hop
     ////////////////////////
-    parallel_for (int sss = 0; sss < B._grid->oSites(); sss++) {
+    parallel_for (int sss = 0; sss < B.Grid()->oSites(); sss++) {
       Kernels::DhopDirK(st, U, st.CommBuf(), sss, sss, B, Btilde, mu, gamma);
     }
 
@@ -229,9 +229,9 @@ void WilsonFermion<Impl>::DerivInternal(StencilImpl &st, DoubledGaugeField &U,
 
 template <class Impl>
 void WilsonFermion<Impl>::DhopDeriv(GaugeField &mat, const FermionField &U, const FermionField &V, int dag) {
-  conformable(U._grid, _grid);
+  conformable(U.Grid(), _grid);
-  conformable(U._grid, V._grid);
+  conformable(U.Grid(), V.Grid());
-  conformable(U._grid, mat._grid);
+  conformable(U.Grid(), mat.Grid());
 
   mat.Checkerboard() = U.Checkerboard();
 
@@ -240,9 +240,9 @@ void WilsonFermion<Impl>::DhopDeriv(GaugeField &mat, const FermionField &U, cons
 
 template <class Impl>
 void WilsonFermion<Impl>::DhopDerivOE(GaugeField &mat, const FermionField &U, const FermionField &V, int dag) {
-  conformable(U._grid, _cbgrid);
+  conformable(U.Grid(), _cbgrid);
-  conformable(U._grid, V._grid);
+  conformable(U.Grid(), V.Grid());
-  //conformable(U._grid, mat._grid); not general, leaving as a comment (Guido)
+  //conformable(U.Grid(), mat.Grid()); not general, leaving as a comment (Guido)
   // Motivation: look at the SchurDiff operator
   
   assert(V.Checkerboard() == Even);
@@ -254,9 +254,9 @@ void WilsonFermion<Impl>::DhopDerivOE(GaugeField &mat, const FermionField &U, co
 
 template <class Impl>
 void WilsonFermion<Impl>::DhopDerivEO(GaugeField &mat, const FermionField &U, const FermionField &V, int dag) {
-  conformable(U._grid, _cbgrid);
+  conformable(U.Grid(), _cbgrid);
-  conformable(U._grid, V._grid);
+  conformable(U.Grid(), V.Grid());
-  //conformable(U._grid, mat._grid);
+  //conformable(U.Grid(), mat.Grid());
 
   assert(V.Checkerboard() == Odd);
   assert(U.Checkerboard() == Even);
@@ -267,8 +267,8 @@ void WilsonFermion<Impl>::DhopDerivEO(GaugeField &mat, const FermionField &U, co
 
 template <class Impl>
 void WilsonFermion<Impl>::Dhop(const FermionField &in, FermionField &out, int dag) {
-  conformable(in._grid, _grid);  // verifies full grid
+  conformable(in.Grid(), _grid);  // verifies full grid
-  conformable(in._grid, out._grid);
+  conformable(in.Grid(), out.Grid());
 
   out.Checkerboard() = in.Checkerboard();
 
@@ -277,8 +277,8 @@ void WilsonFermion<Impl>::Dhop(const FermionField &in, FermionField &out, int da
 
 template <class Impl>
 void WilsonFermion<Impl>::DhopOE(const FermionField &in, FermionField &out, int dag) {
-  conformable(in._grid, _cbgrid);    // verifies half grid
+  conformable(in.Grid(), _cbgrid);    // verifies half grid
-  conformable(in._grid, out._grid);  // drops the cb check
+  conformable(in.Grid(), out.Grid());  // drops the cb check
 
   assert(in.Checkerboard() == Even);
   out.Checkerboard() = Odd;
@@ -288,8 +288,8 @@ void WilsonFermion<Impl>::DhopOE(const FermionField &in, FermionField &out, int
 
 template <class Impl>
 void WilsonFermion<Impl>::DhopEO(const FermionField &in, FermionField &out,int dag) {
-  conformable(in._grid, _cbgrid);    // verifies half grid
+  conformable(in.Grid(), _cbgrid);    // verifies half grid
-  conformable(in._grid, out._grid);  // drops the cb check
+  conformable(in.Grid(), out.Grid());  // drops the cb check
 
   assert(in.Checkerboard() == Odd);
   out.Checkerboard() = Even;
@@ -317,7 +317,7 @@ void WilsonFermion<Impl>::DhopDirDisp(const FermionField &in, FermionField &out,
 
   Stencil.HaloExchange(in, compressor);
 
-  parallel_for (int sss = 0; sss < in._grid->oSites(); sss++) {
+  parallel_for (int sss = 0; sss < in.Grid()->oSites(); sss++) {
     Kernels::DhopDirK(Stencil, Umu, Stencil.CommBuf(), sss, sss, in, out, dirdisp, gamma);
   }
 };
@@ -333,11 +333,11 @@ void WilsonFermion<Impl>::DhopInternal(StencilImpl &st, LebesgueOrder &lo,
   st.HaloExchange(in, compressor);
 
   if (dag == DaggerYes) {
-    parallel_for (int sss = 0; sss < in._grid->oSites(); sss++) {
+    parallel_for (int sss = 0; sss < in.Grid()->oSites(); sss++) {
       Kernels::DhopSiteDag(st, lo, U, st.CommBuf(), sss, sss, 1, 1, in, out);
     }
   } else {
-    parallel_for (int sss = 0; sss < in._grid->oSites(); sss++) {
+    parallel_for (int sss = 0; sss < in.Grid()->oSites(); sss++) {
       Kernels::DhopSite(st, lo, U, st.CommBuf(), sss, sss, 1, 1, in, out);
     }
   }
@@ -356,9 +356,9 @@ void WilsonFermion<Impl>::ContractConservedCurrent(PropagatorField &q_in_1,
                                                    unsigned int mu)
 {
   Gamma g5(Gamma::Algebra::Gamma5);
-  conformable(_grid, q_in_1._grid);
+  conformable(_grid, q_in_1.Grid());
-  conformable(_grid, q_in_2._grid);
+  conformable(_grid, q_in_2.Grid());
-  conformable(_grid, q_out._grid);
+  conformable(_grid, q_out.Grid());
   PropagatorField tmp1(_grid), tmp2(_grid);
   q_out = zero;
 
@@ -366,7 +366,7 @@ void WilsonFermion<Impl>::ContractConservedCurrent(PropagatorField &q_in_1,
   // Inefficient comms method but not performance critical.
   tmp1 = Cshift(q_in_1, mu, 1);
   tmp2 = Cshift(q_in_2, mu, 1);
-  parallel_for (unsigned int sU = 0; sU < Umu._grid->oSites(); ++sU)
+  parallel_for (unsigned int sU = 0; sU < Umu.Grid()->oSites(); ++sU)
     {
       Kernels::ContractConservedCurrentSiteFwd(tmp1[sU],
 					       q_in_2[sU],
@@ -388,8 +388,8 @@ void WilsonFermion<Impl>::SeqConservedCurrent(PropagatorField &q_in,
                                               unsigned int tmin, 
                                               unsigned int tmax)
 {
-  conformable(_grid, q_in._grid);
+  conformable(_grid, q_in.Grid());
-  conformable(_grid, q_out._grid);
+  conformable(_grid, q_out.Grid());
   Lattice<iSinglet<Simd>> ph(_grid), coor(_grid);
   Complex i(0.0,1.0);
   PropagatorField tmpFwd(_grid), tmpBwd(_grid), tmp(_grid);
@@ -415,7 +415,7 @@ void WilsonFermion<Impl>::SeqConservedCurrent(PropagatorField &q_in,
   tmp = ph*q_in;
   tmpBwd = Cshift(tmp, mu, -1);
 
-  parallel_for (unsigned int sU = 0; sU < Umu._grid->oSites(); ++sU)
+  parallel_for (unsigned int sU = 0; sU < Umu.Grid()->oSites(); ++sU)
     {
       // Compute the sequential conserved current insertion only if our simd
       // object contains a timeslice we need.

lib/qcd/action/fermion/WilsonFermion5D.cc

@@ -219,7 +219,7 @@ void WilsonFermion5D<Impl>::ZeroCounters(void) {
 template<class Impl>
 void WilsonFermion5D<Impl>::ImportGauge(const GaugeField &_Umu)
 {
-  GaugeField HUmu(_Umu._grid);
+  GaugeField HUmu(_Umu.Grid());
   HUmu = _Umu*(-0.5);
   Impl::DoubleStore(GaugeGrid(),Umu,HUmu);
   pickCheckerboard(Even,UmuEven,Umu);
@@ -244,7 +244,7 @@ void WilsonFermion5D<Impl>::DhopDir(const FermionField &in, FermionField &out,in
   assert(dirdisp<=7);
   assert(dirdisp>=0);
 
-  parallel_for(int ss=0;ss<Umu._grid->oSites();ss++){
+  parallel_for(int ss=0;ss<Umu.Grid()->oSites();ss++){
     for(int s=0;s<Ls;s++){
       int sU=ss;
       int sF = s+Ls*sU; 
@@ -264,20 +264,20 @@ void WilsonFermion5D<Impl>::DerivInternal(StencilImpl & st,
   DerivCalls++;
   assert((dag==DaggerNo) ||(dag==DaggerYes));
 
-  conformable(st._grid,A._grid);
+  conformable(st.Grid(),A.Grid());
-  conformable(st._grid,B._grid);
+  conformable(st.Grid(),B.Grid());
 
   Compressor compressor(dag);
   
-  FermionField Btilde(B._grid);
+  FermionField Btilde(B.Grid());
-  FermionField Atilde(B._grid);
+  FermionField Atilde(B.Grid());
 
   DerivCommTime-=usecond();
   st.HaloExchange(B,compressor);
   DerivCommTime+=usecond();
 
   Atilde=A;
-  int LLs = B._grid->_rdimensions[0];
+  int LLs = B.Grid()->_rdimensions[0];
 
 
   DerivComputeTime-=usecond();
@@ -293,13 +293,13 @@ void WilsonFermion5D<Impl>::DerivInternal(StencilImpl & st,
     ////////////////////////
 
     DerivDhopComputeTime -= usecond();
-    parallel_for (int sss = 0; sss < U._grid->oSites(); sss++) {
+    parallel_for (int sss = 0; sss < U.Grid()->oSites(); sss++) {
       for (int s = 0; s < Ls; s++) {
         int sU = sss;
         int sF = s + Ls * sU;
 
-        assert(sF < B._grid->oSites());
+        assert(sF < B.Grid()->oSites());
-        assert(sU < U._grid->oSites());
+        assert(sU < U.Grid()->oSites());
 
         Kernels::DhopDirK(st, U, st.CommBuf(), sF, sU, B, Btilde, mu, gamma);
 
@@ -323,10 +323,10 @@ void WilsonFermion5D<Impl>::DhopDeriv(GaugeField &mat,
                                       const FermionField &B,
                                       int dag)
 {
-  conformable(A._grid,FermionGrid());  
+  conformable(A.Grid(),FermionGrid());  
-  conformable(A._grid,B._grid);
+  conformable(A.Grid(),B.Grid());
 
-  //conformable(GaugeGrid(),mat._grid);// this is not general! leaving as a comment
+  //conformable(GaugeGrid(),mat.Grid());// this is not general! leaving as a comment
 
   mat.Checkerboard() = A.Checkerboard();
 
@@ -339,8 +339,8 @@ void WilsonFermion5D<Impl>::DhopDerivEO(GaugeField &mat,
                                         const FermionField &B,
                                         int dag)
 {
-  conformable(A._grid,FermionRedBlackGrid());
+  conformable(A.Grid(),FermionRedBlackGrid());
-  conformable(A._grid,B._grid);
+  conformable(A.Grid(),B.Grid());
 
   assert(B.Checkerboard()==Odd);
   assert(A.Checkerboard()==Even);
@@ -356,8 +356,8 @@ void WilsonFermion5D<Impl>::DhopDerivOE(GaugeField &mat,
                                         const FermionField &B,
                                         int dag)
 {
-  conformable(A._grid,FermionRedBlackGrid());
+  conformable(A.Grid(),FermionRedBlackGrid());
-  conformable(A._grid,B._grid);
+  conformable(A.Grid(),B.Grid());
 
   assert(B.Checkerboard()==Even);
   assert(A.Checkerboard()==Odd);
@@ -392,8 +392,8 @@ void WilsonFermion5D<Impl>::DhopInternalOverlappedComms(StencilImpl & st, Lebesg
 
   Compressor compressor(dag);
 
-  int LLs = in._grid->_rdimensions[0];
+  int LLs = in.Grid()->_rdimensions[0];
-  int len =  U._grid->oSites();
+  int len =  U.Grid()->oSites();
 
   DhopFaceTime-=usecond();
   st.HaloExchangeOptGather(in,compressor);
@@ -417,7 +417,7 @@ void WilsonFermion5D<Impl>::DhopInternalOverlappedComms(StencilImpl & st, Lebesg
       double start = usecond();
       nthreads -= ncomms;
       int ttid = tid - ncomms;
-      int n = U._grid->oSites();
+      int n = U.Grid()->oSites();
       int chunk = n / nthreads;
       int rem = n % nthreads;
       int myblock, myn;
@@ -492,7 +492,7 @@ void WilsonFermion5D<Impl>::DhopInternalSerialComms(StencilImpl & st, LebesgueOr
   //  assert((dag==DaggerNo) ||(dag==DaggerYes));
   Compressor compressor(dag);
 
-  int LLs = in._grid->_rdimensions[0];
+  int LLs = in.Grid()->_rdimensions[0];
   
   DhopCommTime-=usecond();
   st.HaloExchangeOpt(in,compressor);
@@ -502,13 +502,13 @@ void WilsonFermion5D<Impl>::DhopInternalSerialComms(StencilImpl & st, LebesgueOr
   // Dhop takes the 4d grid from U, and makes a 5d index for fermion
 
   if (dag == DaggerYes) {
-    parallel_for (int ss = 0; ss < U._grid->oSites(); ss++) {
+    parallel_for (int ss = 0; ss < U.Grid()->oSites(); ss++) {
       int sU = ss;
       int sF = LLs * sU;
       Kernels::DhopSiteDag(st,lo,U,st.CommBuf(),sF,sU,LLs,1,in,out);
     }
   } else {
-    parallel_for (int ss = 0; ss < U._grid->oSites(); ss++) {
+    parallel_for (int ss = 0; ss < U.Grid()->oSites(); ss++) {
       int sU = ss;
       int sF = LLs * sU;
       Kernels::DhopSite(st,lo,U,st.CommBuf(),sF,sU,LLs,1,in,out);
@@ -522,8 +522,8 @@ template<class Impl>
 void WilsonFermion5D<Impl>::DhopOE(const FermionField &in, FermionField &out,int dag)
 {
   DhopCalls++;
-  conformable(in._grid,FermionRedBlackGrid());    // verifies half grid
+  conformable(in.Grid(),FermionRedBlackGrid());    // verifies half grid
-  conformable(in._grid,out._grid); // drops the cb check
+  conformable(in.Grid(),out.Grid()); // drops the cb check
 
   assert(in.Checkerboard()==Even);
   out.Checkerboard() = Odd;
@@ -534,8 +534,8 @@ template<class Impl>
 void WilsonFermion5D<Impl>::DhopEO(const FermionField &in, FermionField &out,int dag)
 {
   DhopCalls++;
-  conformable(in._grid,FermionRedBlackGrid());    // verifies half grid
+  conformable(in.Grid(),FermionRedBlackGrid());    // verifies half grid
-  conformable(in._grid,out._grid); // drops the cb check
+  conformable(in.Grid(),out.Grid()); // drops the cb check
 
   assert(in.Checkerboard()==Odd);
   out.Checkerboard() = Even;
@@ -546,8 +546,8 @@ template<class Impl>
 void WilsonFermion5D<Impl>::Dhop(const FermionField &in, FermionField &out,int dag)
 {
   DhopCalls+=2;
-  conformable(in._grid,FermionGrid()); // verifies full grid
+  conformable(in.Grid(),FermionGrid()); // verifies full grid
-  conformable(in._grid,out._grid);
+  conformable(in.Grid(),out.Grid());
 
   out.Checkerboard() = in.Checkerboard();
 
@@ -566,7 +566,7 @@ void WilsonFermion5D<Impl>::MomentumSpacePropagatorHt(FermionField &out,const Fe
 {
   // what type LatticeComplex 
   GridBase *_grid = _FourDimGrid;
-  conformable(_grid,out._grid);
+  conformable(_grid,out.Grid());
   
   typedef typename FermionField::vector_type vector_type;
   typedef typename FermionField::scalar_type ScalComplex;
@@ -651,7 +651,7 @@ void WilsonFermion5D<Impl>::MomentumSpacePropagatorHw(FermionField &out,const Fe
   };
 
   GridBase *_grid = _FourDimGrid;
-  conformable(_grid,out._grid);
+  conformable(_grid,out.Grid());
 
   typedef typename FermionField::vector_type vector_type;
   typedef typename FermionField::scalar_type ScalComplex;
@@ -728,18 +728,18 @@ void WilsonFermion5D<Impl>::ContractConservedCurrent(PropagatorField &q_in_1,
                                                      Current curr_type,
                                                      unsigned int mu)
 {
-  conformable(q_in_1._grid, FermionGrid());
+  conformable(q_in_1.Grid(), FermionGrid());
-  conformable(q_in_1._grid, q_in_2._grid);
+  conformable(q_in_1.Grid(), q_in_2.Grid());
-  conformable(_FourDimGrid, q_out._grid);
+  conformable(_FourDimGrid, q_out.Grid());
   PropagatorField tmp1(FermionGrid()), tmp2(FermionGrid());
-  unsigned int LLs = q_in_1._grid->_rdimensions[0];
+  unsigned int LLs = q_in_1.Grid()->_rdimensions[0];
   q_out = zero;
 
   // Forward, need q1(x + mu, s), q2(x, Ls - 1 - s). Backward, need q1(x, s), 
   // q2(x + mu, Ls - 1 - s). 5D lattice so shift 4D coordinate mu by one.
   tmp1 = Cshift(q_in_1, mu + 1, 1);
   tmp2 = Cshift(q_in_2, mu + 1, 1);
-  parallel_for (unsigned int sU = 0; sU < Umu._grid->oSites(); ++sU)
+  parallel_for (unsigned int sU = 0; sU < Umu.Grid()->oSites(); ++sU)
     {
       unsigned int sF1 = sU * LLs;
       unsigned int sF2 = (sU + 1) * LLs - 1;
@@ -786,14 +786,14 @@ void WilsonFermion5D<Impl>::SeqConservedCurrent(PropagatorField &q_in,
                                                 unsigned int tmin, 
                                                 unsigned int tmax)
 {
-  conformable(q_in._grid, FermionGrid());
+  conformable(q_in.Grid(), FermionGrid());
-  conformable(q_in._grid, q_out._grid);
+  conformable(q_in.Grid(), q_out.Grid());
   Lattice<iSinglet<Simd>> ph(FermionGrid()), coor(FermionGrid());
   PropagatorField tmpFwd(FermionGrid()), tmpBwd(FermionGrid()),
     tmp(FermionGrid());
   Complex i(0.0, 1.0);
   unsigned int tshift = (mu == Tp) ? 1 : 0;
-  unsigned int LLs = q_in._grid->_rdimensions[0];
+  unsigned int LLs = q_in.Grid()->_rdimensions[0];
   unsigned int LLt    = GridDefaultLatt()[Tp];
 
   // Momentum projection.
@@ -817,7 +817,7 @@ void WilsonFermion5D<Impl>::SeqConservedCurrent(PropagatorField &q_in,
   tmp = ph*q_in;
   tmpBwd = Cshift(tmp, mu + 1, -1);
 
-  parallel_for (unsigned int sU = 0; sU < Umu._grid->oSites(); ++sU)
+  parallel_for (unsigned int sU = 0; sU < Umu.Grid()->oSites(); ++sU)
     {
       // Compute the sequential conserved current insertion only if our simd
       // object contains a timeslice we need.

lib/qcd/action/fermion/WilsonKernelsAsmBody.h

@@ -134,7 +134,7 @@
 
   COMPLEX_SIGNS(isigns);
   MASK_REGS;
-  int nmax=U._grid->oSites();
+  int nmax=U.Grid()->oSites();
   for(int site=0;site<Ns;site++) {
 #ifndef EXTERIOR
     int sU =lo.Reorder(ssU);

lib/qcd/action/fermion/WilsonKernelsHand.cc

@@ -92,7 +92,7 @@ Author: paboyle <paboyle@ph.ed.ac.uk>
   g = F;								\
   direction = st._directions[DIR];				\
   distance = st._distances[DIR];				\
-  sl = st._grid->_simd_layout[direction];			\
+  sl = st.Grid()->_simd_layout[direction];			\
   inplace_twist = 0;						\
   if(SE->_around_the_world && this->Params.twists[DIR % 4]){		\
     if(sl == 1){							\

lib/qcd/action/fermion/g5HermitianLinop.h

@@ -45,12 +45,12 @@ public:
     HermOp(in,out);
   }
   void OpDiag (const Field &in, Field &out) {
-    Field tmp(in._grid);
+    Field tmp(in.Grid());
     _Mat.Mdiag(in,tmp);
     G5R5(out,tmp);
   }
   void OpDir  (const Field &in, Field &out,int dir,int disp) {
-    Field tmp(in._grid);
+    Field tmp(in.Grid());
     _Mat.Mdir(in,tmp,dir,disp);
     G5R5(out,tmp);
   }
@@ -67,7 +67,7 @@ public:
     n2=real(dot);
   }
   void HermOp(const Field &in, Field &out){
-    Field tmp(in._grid);
+    Field tmp(in.Grid());
     _Mat.M(in,tmp);
     G5R5(out,tmp);
   }
@@ -87,12 +87,12 @@ public:
     HermOp(in,out);
   }
   void OpDiag (const Field &in, Field &out) {
-    Field tmp(in._grid);
+    Field tmp(in.Grid());
     _Mat.Mdiag(in,tmp);
     out=g5*tmp;
   }
   void OpDir  (const Field &in, Field &out,int dir,int disp) {
-    Field tmp(in._grid);
+    Field tmp(in.Grid());
     _Mat.Mdir(in,tmp,dir,disp);
     out=g5*tmp;
   }
@@ -109,7 +109,7 @@ public:
     n2=real(dot);
   }
   void HermOp(const Field &in, Field &out){
-    Field tmp(in._grid);
+    Field tmp(in.Grid());
     _Mat.M(in,tmp);
     out=g5*tmp;
   }

lib/qcd/action/gauge/GaugeImplTypes.h

@@ -76,7 +76,7 @@ public:
   // Move this elsewhere? FIXME
   static inline void AddLink(Field &U, LinkField &W,
                                   int mu) { // U[mu] += W
-    thread_loop ( (auto ss = 0; ss < U._grid->oSites(); ss++),{
+    thread_loop ( (auto ss = 0; ss < U.Grid()->oSites(); ss++),{
       U[ss]._internal[mu] =
           U[ss]._internal[mu] + W[ss]._internal;
     });
@@ -87,7 +87,7 @@ public:
   // HMC auxiliary functions
   static inline void generate_momenta(Field &P, GridParallelRNG &pRNG) {
     // specific for SU gauge fields
-    LinkField Pmu(P._grid);
+    LinkField Pmu(P.Grid());
     Pmu = zero;
     for (int mu = 0; mu < Nd; mu++) {
       SU<Nrepresentation>::GaussianFundamentalLieAlgebraMatrix(pRNG, Pmu);
@@ -101,7 +101,7 @@ public:
     //static std::chrono::duration<double> diff;
 
     //auto start = std::chrono::high_resolution_clock::now();
-    parallel_for(int ss=0;ss<P._grid->oSites();ss++){
+    parallel_for(int ss=0;ss<P.Grid()->oSites();ss++){
       for (int mu = 0; mu < Nd; mu++) 
         U[ss]._internal[mu] = ProjectOnGroup(Exponentiate(P[ss]._internal[mu], ep, Nexp) * U[ss]._internal[mu]);
     }
@@ -112,7 +112,7 @@ public:
   }
 
   static inline RealD FieldSquareNorm(Field& U){
-    LatticeComplex Hloc(U._grid);
+    LatticeComplex Hloc(U.Grid());
     Hloc = zero;
     for (int mu = 0; mu < Nd; mu++) {
       auto Umu = PeekIndex<LorentzIndex>(U, mu);

lib/qcd/action/gauge/GaugeImplementations.h

@@ -96,7 +96,7 @@ public:
 
   static inline GaugeLinkField
   CovShiftIdentityBackward(const GaugeLinkField &Link, int mu) {
-    GridBase *grid = Link._grid;
+    GridBase *grid = Link.Grid();
     int Lmu = grid->GlobalDimensions()[mu] - 1;
 
     Lattice<iScalar<vInteger>> coor(grid);
@@ -113,7 +113,7 @@ public:
   }
 
   static inline GaugeLinkField ShiftStaple(const GaugeLinkField &Link, int mu) {
-    GridBase *grid = Link._grid;
+    GridBase *grid = Link.Grid();
     int Lmu = grid->GlobalDimensions()[mu] - 1;
 
     Lattice<iScalar<vInteger>> coor(grid);

lib/qcd/action/gauge/Photon.h

@@ -86,10 +86,10 @@ Photon<Gimpl>::Photon(Gauge gauge, ZmScheme zmScheme)
 template<class Gimpl>
 void Photon<Gimpl>::FreePropagator (const GaugeField &in,GaugeField &out)
 {
-  FFT theFFT(in._grid);
+  FFT theFFT(in.Grid());
     
-  GaugeField in_k(in._grid);
+  GaugeField in_k(in.Grid());
-  GaugeField prop_k(in._grid);
+  GaugeField prop_k(in.Grid());
     
   theFFT.FFT_all_dim(in_k,in,FFT::forward);
   MomentumSpacePropagator(prop_k,in_k);
@@ -99,7 +99,7 @@ void Photon<Gimpl>::FreePropagator (const GaugeField &in,GaugeField &out)
 template<class Gimpl>
 void Photon<Gimpl>::invKHatSquared(GaugeLinkField &out)
 {
-  GridBase           *grid = out._grid;
+  GridBase           *grid = out.Grid();
   GaugeLinkField     kmu(grid), one(grid);
   const unsigned int nd    = grid->_ndimension;
   std::vector<int>   &l    = grid->_fdimensions;
@@ -125,7 +125,7 @@ void Photon<Gimpl>::invKHatSquared(GaugeLinkField &out)
 template<class Gimpl>
 void Photon<Gimpl>::zmSub(GaugeLinkField &out)
 {
-  GridBase           *grid = out._grid;
+  GridBase           *grid = out.Grid();
   const unsigned int nd    = grid->_ndimension;
     
   switch (zmScheme_)
@@ -163,7 +163,7 @@ template<class Gimpl>
 void Photon<Gimpl>::MomentumSpacePropagator(const GaugeField &in,
 					    GaugeField &out)
 {
-  GridBase           *grid = out._grid;
+  GridBase           *grid = out.Grid();
   LatticeComplex     k2Inv(grid);
     
   invKHatSquared(k2Inv);
@@ -175,7 +175,7 @@ void Photon<Gimpl>::MomentumSpacePropagator(const GaugeField &in,
 template<class Gimpl>
 void Photon<Gimpl>::StochasticWeight(GaugeLinkField &weight)
 {
-  auto               *grid     = dynamic_cast<GridCartesian *>(weight._grid);
+  auto               *grid     = dynamic_cast<GridCartesian *>(weight.Grid());
   const unsigned int nd        = grid->_ndimension;
   std::vector<int>   latt_size = grid->_fdimensions;
     
@@ -192,7 +192,7 @@ void Photon<Gimpl>::StochasticWeight(GaugeLinkField &weight)
 template<class Gimpl>
 void Photon<Gimpl>::StochasticField(GaugeField &out, GridParallelRNG &rng)
 {
-  auto           *grid = dynamic_cast<GridCartesian *>(out._grid);
+  auto           *grid = dynamic_cast<GridCartesian *>(out.Grid());
   GaugeLinkField weight(grid);
     
   StochasticWeight(weight);
@@ -203,7 +203,7 @@ template<class Gimpl>
 void Photon<Gimpl>::StochasticField(GaugeField &out, GridParallelRNG &rng,
 				    const GaugeLinkField &weight)
 {
-  auto               *grid = dynamic_cast<GridCartesian *>(out._grid);
+  auto               *grid = dynamic_cast<GridCartesian *>(out.Grid());
   const unsigned int nd = grid->_ndimension;
   GaugeLinkField     r(grid);
   GaugeField         aTilde(grid);
@@ -226,7 +226,7 @@ void Photon<Gimpl>::StochasticField(GaugeField &out, GridParallelRNG &rng,
 //    
 //    FeynmanGaugeMomentumSpacePropagator_TL(out,in);
 //    
-//    GridBase *grid = out._grid;
+//    GridBase *grid = out.Grid();
 //    LatticeInteger     coor(grid);
 //    GaugeField zz(grid); zz=zero;
 //    
@@ -243,7 +243,7 @@ void Photon<Gimpl>::StochasticField(GaugeField &out, GridParallelRNG &rng,
 //  {
 //    
 //    // what type LatticeComplex
-//    GridBase *grid = out._grid;
+//    GridBase *grid = out.Grid();
 //    int nd = grid->_ndimension;
 //    
 //    typedef typename GaugeField::vector_type vector_type;

lib/qcd/action/gauge/PlaqPlusRectangleAction.h

@@ -60,7 +60,7 @@ public:
 
 
   virtual RealD S(const GaugeField &U) {
-    RealD vol = U._grid->gSites();
+    RealD vol = U.Grid()->gSites();
 
     RealD plaq = WilsonLoops<Gimpl>::avgPlaquette(U);
     RealD rect = WilsonLoops<Gimpl>::avgRectangle(U);
@@ -76,7 +76,7 @@ public:
     RealD factor_p = c_plaq/RealD(Nc)*0.5;
     RealD factor_r =   c_rect/RealD(Nc)*0.5;
 
-    GridBase *grid = Umu._grid;
+    GridBase *grid = Umu.Grid();
 
     std::vector<GaugeLinkField> U (Nd,grid);
     std::vector<GaugeLinkField> U2(Nd,grid);

lib/qcd/action/gauge/WilsonGaugeAction.h

@@ -59,7 +59,7 @@ public:
 
   virtual RealD S(const GaugeField &U) {
     RealD plaq = WilsonLoops<Gimpl>::avgPlaquette(U);
-    RealD vol = U._grid->gSites();
+    RealD vol = U.Grid()->gSites();
     RealD action = beta * (1.0 - plaq) * (Nd * (Nd - 1.0)) * vol * 0.5;
     return action;
   };
@@ -70,8 +70,8 @@ public:
 
     RealD factor = 0.5 * beta / RealD(Nc);
 
-    //GaugeLinkField Umu(U._grid);
+    //GaugeLinkField Umu(U.Grid());
-    GaugeLinkField dSdU_mu(U._grid);
+    GaugeLinkField dSdU_mu(U.Grid());
     for (int mu = 0; mu < Nd; mu++) {
       //Umu = PeekIndex<LorentzIndex>(U, mu);
 

lib/qcd/action/pseudofermion/EvenOddSchurDifferentiable.h

@@ -57,8 +57,8 @@ public:
     FermionField tmp1(fcbgrid);
     FermionField tmp2(fcbgrid);
 
-    conformable(fcbgrid,U._grid);
+    conformable(fcbgrid,U.Grid());
-    conformable(fcbgrid,V._grid);
+    conformable(fcbgrid,V.Grid());
 
     // Assert the checkerboard?? or code for either
     assert(U.Checkerboard()==Odd);
@@ -68,7 +68,7 @@ public:
     // it is not conformable with the HMC force field
     // Case: Ls vectorised fields
     // INHERIT FROM THE Force field instead
-    GridRedBlackCartesian* forcecb = new GridRedBlackCartesian(Force._grid);
+    GridRedBlackCartesian* forcecb = new GridRedBlackCartesian(Force.Grid());
     GaugeField ForceO(forcecb);
     GaugeField ForceE(forcecb);
 
@@ -102,8 +102,8 @@ public:
     FermionField tmp1(fcbgrid);
     FermionField tmp2(fcbgrid);
 
-    conformable(fcbgrid,U._grid);
+    conformable(fcbgrid,U.Grid());
-    conformable(fcbgrid,V._grid);
+    conformable(fcbgrid,V.Grid());
 
     // Assert the checkerboard?? or code for either
     assert(V.Checkerboard()==Odd);
@@ -112,7 +112,7 @@ public:
     // NOTE Guido: WE DO NOT WANT TO USE THE ucbgrid GRID FOR THE FORCE
     // it is not conformable with the HMC force field
     // INHERIT FROM THE Force field instead
-    GridRedBlackCartesian* forcecb = new GridRedBlackCartesian(Force._grid);
+    GridRedBlackCartesian* forcecb = new GridRedBlackCartesian(Force.Grid());
     GaugeField ForceO(forcecb);
     GaugeField ForceE(forcecb);
 

lib/qcd/action/pseudofermion/TwoFlavourEvenOddRatio.h

@@ -173,7 +173,7 @@ public:
     FermionField  Y(NumOp.FermionRedBlackGrid());
 
     // This assignment is necessary to be compliant with the HMC grids
-    GaugeField force(dSdU._grid);
+    GaugeField force(dSdU.Grid());
 
     //Y=Vdag phi
     //X = (Mdag M)^-1 V^dag phi

lib/qcd/action/scalar/ScalarAction.h

@@ -65,8 +65,8 @@ public:
 
   virtual void deriv(const Field &p,
 		     Field &force) {
-    Field tmp(p._grid);
+    Field tmp(p.Grid());
-    Field p2(p._grid);
+    Field p2(p.Grid());
     ScalarObs<Impl>::phisquared(p2, p);
     tmp = -(Cshift(p, 0, -1) + Cshift(p, 0, 1));
     for (int mu = 1; mu < Nd; mu++) tmp -= Cshift(p, mu, -1) + Cshift(p, mu, 1);

lib/qcd/action/scalar/ScalarImpl.h

@@ -48,7 +48,7 @@ public:
     
   static void MomentumSpacePropagator(Field &out, RealD m)
   {
-    GridBase           *grid = out._grid;
+    GridBase           *grid = out.Grid();
     Field              kmu(grid), one(grid);
     const unsigned int nd    = grid->_ndimension;
     std::vector<int>   &l    = grid->_fdimensions;
@@ -69,8 +69,8 @@ public:
   static void FreePropagator(const Field &in, Field &out,
 			     const Field &momKernel)
   {
-    FFT   fft((GridCartesian *)in._grid);
+    FFT   fft((GridCartesian *)in.Grid());
-    Field inFT(in._grid);
+    Field inFT(in.Grid());
       
     fft.FFT_all_dim(inFT, in, FFT::forward);
     inFT = inFT*momKernel;
@@ -79,7 +79,7 @@ public:
     
   static void FreePropagator(const Field &in, Field &out, RealD m)
   {
-    Field momKernel(in._grid);
+    Field momKernel(in.Grid());
       
     MomentumSpacePropagator(momKernel, m);
     FreePropagator(in, out, momKernel);

lib/qcd/action/scalar/ScalarInteractionAction.h

@@ -74,15 +74,15 @@ public:
   virtual void refresh(const Field &U, GridParallelRNG &pRNG) {}
 
   virtual RealD S(const Field &p) {
-    assert(p._grid->Nd() == Ndim);
+    assert(p.Grid()->Nd() == Ndim);
-    static Stencil phiStencil(p._grid, npoint, 0, directions, displacements);
+    static Stencil phiStencil(p.Grid(), npoint, 0, directions, displacements);
     phiStencil.HaloExchange(p, compressor);
-    Field action(p._grid), pshift(p._grid), phisquared(p._grid);
+    Field action(p.Grid()), pshift(p.Grid()), phisquared(p.Grid());
     phisquared = p*p;
     action = (2.0*Ndim + mass_square)*phisquared - lambda/24.*phisquared*phisquared;
     for (int mu = 0; mu < Ndim; mu++) {
       //  pshift = Cshift(p, mu, +1);  // not efficient, implement with stencils
-      parallel_for (int i = 0; i < p._grid->oSites(); i++) {
+      parallel_for (int i = 0; i < p.Grid()->oSites(); i++) {
 	int permute_type;
 	StencilEntry *SE;
 	vobj temp2;
@@ -110,15 +110,15 @@ public:
   };
 
   virtual void deriv(const Field &p, Field &force) {
-    assert(p._grid->Nd() == Ndim);
+    assert(p.Grid()->Nd() == Ndim);
     force = (2.0*Ndim + mass_square)*p - lambda/12.*p*p*p;
     // move this outside
-    static Stencil phiStencil(p._grid, npoint, 0, directions, displacements);
+    static Stencil phiStencil(p.Grid(), npoint, 0, directions, displacements);
     phiStencil.HaloExchange(p, compressor);
       
     //for (int mu = 0; mu < Nd; mu++) force -= Cshift(p, mu, -1) + Cshift(p, mu, 1);
     for (int point = 0; point < npoint; point++) {
-      parallel_for (int i = 0; i < p._grid->oSites(); i++) {
+      parallel_for (int i = 0; i < p.Grid()->oSites(); i++) {
 	const vobj *temp;
 	vobj temp2;
 	int permute_type;

lib/qcd/hmc/HMC.h

@@ -189,7 +189,7 @@ public:
   void evolve(void) {
     Real DeltaH;
 
-    Field Ucopy(Ucur._grid);
+    Field Ucopy(Ucur.Grid());
 
     Params.print_parameters();
     TheIntegrator.print_actions();

lib/qcd/hmc/integrators/Integrator.h

@@ -98,11 +98,11 @@ protected:
     void operator()(std::vector<Action<FieldType>*> repr_set, Repr& Rep,
                     GF& Mom, GF& U, double ep) {
       for (int a = 0; a < repr_set.size(); ++a) {
-        FieldType forceR(U._grid);
+        FieldType forceR(U.Grid());
         // Implement smearing only for the fundamental representation now
         repr_set.at(a)->deriv(Rep.U, forceR);
         GF force = Rep.RtoFundamentalProject(forceR);  // Ta for the fundamental rep
-        Real force_abs = std::sqrt(norm2(force)/(U._grid->gSites()));
+        Real force_abs = std::sqrt(norm2(force)/(U.Grid()->gSites()));
         std::cout << GridLogIntegrator << "Hirep Force average: " << force_abs << std::endl;
         Mom -= force * ep ;
       }
@@ -114,15 +114,15 @@ protected:
     // Fundamental updates, include smearing
 
     for (int a = 0; a < as[level].actions.size(); ++a) {
-      Field force(U._grid);
+      Field force(U.Grid());
-      conformable(U._grid, Mom._grid);
+      conformable(U.Grid(), Mom.Grid());
       Field& Us = Smearer.get_U(as[level].actions.at(a)->is_smeared);
       as[level].actions.at(a)->deriv(Us, force);  // deriv should NOT include Ta
 
       std::cout << GridLogIntegrator << "Smearing (on/off): " << as[level].actions.at(a)->is_smeared << std::endl;
       if (as[level].actions.at(a)->is_smeared) Smearer.smeared_force(force);
       force = FieldImplementation::projectForce(force); // Ta for gauge fields
-      Real force_abs = std::sqrt(norm2(force)/U._grid->gSites());
+      Real force_abs = std::sqrt(norm2(force)/U.Grid()->gSites());
       std::cout << GridLogIntegrator << "Force average: " << force_abs << std::endl;
       Mom -= force * ep; 
     }
@@ -210,7 +210,7 @@ public:
 
   // Initialization of momenta and actions
   void refresh(Field& U, GridParallelRNG& pRNG) {
-    assert(P._grid == U._grid);
+    assert(P.Grid() == U.Grid());
     std::cout << GridLogIntegrator << "Integrator refresh\n";
 
     FieldImplementation::generate_momenta(P, pRNG);

lib/qcd/hmc/integrators/Integrator_algorithm.h

@@ -226,8 +226,8 @@ public:
   std::string integrator_name(){return "ForceGradient";}
   
   void FG_update_P(Field& U, int level, double fg_dt, double ep) {
-    Field Ufg(U._grid);
+    Field Ufg(U.Grid());
-    Field Pfg(U._grid);
+    Field Pfg(U.Grid());
     Ufg = U;
     Pfg = zero;
     std::cout << GridLogIntegrator << "FG update " << fg_dt << " " << ep

lib/qcd/representations/adjoint.h

@@ -37,12 +37,12 @@ public:
     // T_F is 1/2 for the fundamental representation
     conformable(U, Uin);
     U = zero;
-    LatticeColourMatrix tmp(Uin._grid);
+    LatticeColourMatrix tmp(Uin.Grid());
 
     Vector<typename SU<ncolour>::Matrix> ta(Dimension);
 
     // Debug lines
-    // LatticeMatrix uno(Uin._grid);
+    // LatticeMatrix uno(Uin.Grid());
     // uno = 1.0;
     ////////////////
 
@@ -75,16 +75,16 @@ public:
 
   LatticeGaugeField RtoFundamentalProject(const LatticeField &in,
                                           Real scale = 1.0) const {
-    LatticeGaugeField out(in._grid);
+    LatticeGaugeField out(in.Grid());
     out = zero;
 
     for (int mu = 0; mu < Nd; mu++) {
-      LatticeColourMatrix out_mu(in._grid);  // fundamental representation
+      LatticeColourMatrix out_mu(in.Grid());  // fundamental representation
       LatticeMatrix in_mu = peekLorentz(in, mu);
 
       out_mu = zero;
 
-      typename SU<ncolour>::LatticeAlgebraVector h(in._grid);
+      typename SU<ncolour>::LatticeAlgebraVector h(in.Grid());
       projectOnAlgebra(h, in_mu, double(Nc) * 2.0);  // factor C(r)/C(fund)
       FundamentalLieAlgebraMatrix(h, out_mu);   // apply scale only once
       pokeLorentz(out, out_mu, mu);

lib/qcd/representations/two_index.h

@@ -40,7 +40,7 @@ public:
     // (U)_{(ij)(lk)} = tr [ adj(e^(ij)) U e^(lk) transpose(U) ]
     conformable(U, Uin);
     U = zero;
-    LatticeColourMatrix tmp(Uin._grid);
+    LatticeColourMatrix tmp(Uin.Grid());
 
     Vector<typename SU<ncolour>::Matrix> eij(Dimension);
 
@@ -61,16 +61,16 @@ public:
 
   LatticeGaugeField RtoFundamentalProject(const LatticeField &in,
                                           Real scale = 1.0) const {
-    LatticeGaugeField out(in._grid);
+    LatticeGaugeField out(in.Grid());
     out = zero;
 
     for (int mu = 0; mu < Nd; mu++) {
-      LatticeColourMatrix out_mu(in._grid);  // fundamental representation
+      LatticeColourMatrix out_mu(in.Grid());  // fundamental representation
       LatticeMatrix in_mu = peekLorentz(in, mu);
 
       out_mu = zero;
 
-      typename SU<ncolour>::LatticeAlgebraVector h(in._grid);
+      typename SU<ncolour>::LatticeAlgebraVector h(in.Grid());
       projectOnAlgebra(h, in_mu, double(Nc + 2 * S));  // factor T(r)/T(fund)
       FundamentalLieAlgebraMatrix(h, out_mu);          // apply scale only once
       pokeLorentz(out, out_mu, mu);

lib/qcd/smearing/APEsmearing.h

@@ -63,7 +63,7 @@ public:
 
   ///////////////////////////////////////////////////////////////////////////////
   void smear(GaugeField& u_smr, const GaugeField& U)const{
-    GridBase *grid = U._grid;
+    GridBase *grid = U.Grid();
     GaugeLinkField Cup(grid), tmp_stpl(grid);
     WilsonLoops<Gimpl> WL;
     u_smr = zero;
@@ -93,7 +93,7 @@ public:
     // Computing Sigma_mu, derivative of S[fat links] with respect to the thin links
     // Output SigmaTerm
 
-    GridBase *grid = U._grid;
+    GridBase *grid = U.Grid();
 
     WilsonLoops<Gimpl> WL;
     GaugeLinkField staple(grid), u_tmp(grid);

lib/qcd/smearing/GaugeConfiguration.h

@@ -81,7 +81,7 @@ private:
   //====================================================================
   GaugeField AnalyticSmearedForce(const GaugeField& SigmaKPrime,
                                   const GaugeField& GaugeK) const {
-    GridBase* grid = GaugeK._grid;
+    GridBase* grid = GaugeK.Grid();
     GaugeField C(grid), SigmaK(grid), iLambda(grid);
     GaugeLinkField iLambda_mu(grid);
     GaugeLinkField iQ(grid), e_iQ(grid);
@@ -115,7 +115,7 @@ private:
   void set_iLambda(GaugeLinkField& iLambda, GaugeLinkField& e_iQ,
                    const GaugeLinkField& iQ, const GaugeLinkField& Sigmap,
                    const GaugeLinkField& GaugeK) const {
-    GridBase* grid = iQ._grid;
+    GridBase* grid = iQ.Grid();
     GaugeLinkField iQ2(grid), iQ3(grid), B1(grid), B2(grid), USigmap(grid);
     GaugeLinkField unity(grid);
     unity = 1.0;
@@ -230,7 +230,7 @@ public:
   void smeared_force(GaugeField& SigmaTilde) const {
     if (smearingLevels > 0) {
       GaugeField force = SigmaTilde; // actually = U*SigmaTilde
-      GaugeLinkField tmp_mu(SigmaTilde._grid);
+      GaugeLinkField tmp_mu(SigmaTilde.Grid());
 
       for (int mu = 0; mu < Nd; mu++) {
         // to get just SigmaTilde

lib/qcd/smearing/StoutSmearing.h

@@ -28,8 +28,8 @@ public:
   ~Smear_Stout() {}  // delete SmearBase...
 
   void smear(GaugeField& u_smr, const GaugeField& U) const {
-    GaugeField C(U._grid);
+    GaugeField C(U.Grid());
-    GaugeLinkField tmp(U._grid), iq_mu(U._grid), Umu(U._grid);
+    GaugeLinkField tmp(U.Grid()), iq_mu(U.Grid()), Umu(U.Grid());
 
     std::cout << GridLogDebug << "Stout smearing started\n";
 
@@ -70,7 +70,7 @@ public:
     // the i sign is coming from outside
     // input matrix is anti-hermitian NOT hermitian
 
-    GridBase* grid = iQ._grid;
+    GridBase* grid = iQ.Grid();
     GaugeLinkField unity(grid);
     unity = 1.0;
 
@@ -92,7 +92,7 @@ public:
     Complex one_over_three = 1.0 / 3.0;
     Complex one_over_two = 1.0 / 2.0;
 
-    GridBase* grid = u._grid;
+    GridBase* grid = u.Grid();
     LatticeComplex c0(grid), c1(grid), tmp(grid), c0max(grid), theta(grid);
 
     // sign in c0 from the conventions on the Ta
@@ -111,7 +111,7 @@ public:
 
   void set_fj(LatticeComplex& f0, LatticeComplex& f1, LatticeComplex& f2,
               const LatticeComplex& u, const LatticeComplex& w) const {
-    GridBase* grid = u._grid;
+    GridBase* grid = u.Grid();
     LatticeComplex xi0(grid), u2(grid), w2(grid), cosw(grid);
     LatticeComplex fden(grid);
     LatticeComplex h0(grid), h1(grid), h2(grid);

lib/qcd/smearing/WilsonFlow.h

@@ -85,8 +85,8 @@ public:
 ////////////////////////////////////////////////////////////////////////////////
 template <class Gimpl>
 void WilsonFlow<Gimpl>::evolve_step(typename Gimpl::GaugeField &U) const{
-  GaugeField Z(U._grid);
+  GaugeField Z(U.Grid());
-  GaugeField tmp(U._grid);
+  GaugeField tmp(U.Grid());
   SG.deriv(U, Z);
   Z *= 0.25;                                  // Z0 = 1/4 * F(U)
   Gimpl::update_field(Z, U, -2.0*epsilon);    // U = W1 = exp(ep*Z0)*W0
@@ -108,9 +108,9 @@ void WilsonFlow<Gimpl>::evolve_step_adaptive(typename Gimpl::GaugeField &U, Real
     epsilon = maxTau-taus;
   }
   //std::cout << GridLogMessage << "Integration epsilon : " << epsilon << std::endl;
-  GaugeField Z(U._grid);
+  GaugeField Z(U.Grid());
-  GaugeField Zprime(U._grid);
+  GaugeField Zprime(U.Grid());
-  GaugeField tmp(U._grid), Uprime(U._grid);
+  GaugeField tmp(U.Grid()), Uprime(U.Grid());
   Uprime = U;
   SG.deriv(U, Z);
   Zprime = -Z;
@@ -147,12 +147,12 @@ void WilsonFlow<Gimpl>::evolve_step_adaptive(typename Gimpl::GaugeField &U, Real
 template <class Gimpl>
 RealD WilsonFlow<Gimpl>::energyDensityPlaquette(unsigned int step, const GaugeField& U) const {
   RealD td = tau(step);
-  return 2.0 * td * td * SG.S(U)/U._grid->gSites();
+  return 2.0 * td * td * SG.S(U)/U.Grid()->gSites();
 }
 
 template <class Gimpl>
 RealD WilsonFlow<Gimpl>::energyDensityPlaquette(const GaugeField& U) const {
-  return 2.0 * taus * taus * SG.S(U)/U._grid->gSites();
+  return 2.0 * taus * taus * SG.S(U)/U.Grid()->gSites();
 }
 
 

lib/qcd/utils/CovariantCshift.h

@@ -48,7 +48,7 @@ namespace PeriodicBC {
 									    int mu,
 									    const Lattice<covariant> &field)
   {
-    Lattice<covariant> tmp(field._grid);
+    Lattice<covariant> tmp(field.Grid());
     tmp = adj(Link)*field;
     return Cshift(tmp,mu,-1);// moves towards positive mu
   }
@@ -87,7 +87,7 @@ namespace ConjugateBC {
 									   int mu,
 									   const Lattice<covariant> &field)
   {
-    GridBase * grid = Link._grid;
+    GridBase * grid = Link.Grid();
 
     int Lmu = grid->GlobalDimensions()[mu]-1;
 
@@ -106,7 +106,7 @@ namespace ConjugateBC {
 									    int mu,
 									    const Lattice<covariant> &field)
   {
-    GridBase * grid = field._grid;
+    GridBase * grid = field.Grid();
 
     int Lmu = grid->GlobalDimensions()[mu]-1;
 

lib/qcd/utils/CovariantLaplacian.h

@@ -108,14 +108,14 @@ public:
     //GaugeField herm = in + adj(in);
     //std::cout << "AHermiticity: " << norm2(herm) << std::endl;
 
-    GaugeLinkField tmp(in._grid);
+    GaugeLinkField tmp(in.Grid());
-    GaugeLinkField tmp2(in._grid);
+    GaugeLinkField tmp2(in.Grid());
-    GaugeLinkField sum(in._grid);
+    GaugeLinkField sum(in.Grid());
 
     for (int nu = 0; nu < Nd; nu++) {
       sum = zero;
       GaugeLinkField in_nu = PeekIndex<LorentzIndex>(in, nu);
-      GaugeLinkField out_nu(out._grid);
+      GaugeLinkField out_nu(out.Grid());
       for (int mu = 0; mu < Nd; mu++) {
         tmp = U[mu] * Cshift(in_nu, mu, +1) * adj(U[mu]);
         tmp2 = adj(U[mu]) * in_nu * U[mu];
@@ -131,7 +131,7 @@ public:
     RealD factor = -kappa / (double(4 * Nd));
     
     for (int mu = 0; mu < Nd; mu++){
-      GaugeLinkField der_mu(der._grid);
+      GaugeLinkField der_mu(der.Grid());
       der_mu = zero;
       for (int nu = 0; nu < Nd; nu++){
         GaugeLinkField in_nu = PeekIndex<LorentzIndex>(in, nu);
@@ -150,7 +150,7 @@ public:
     RealD factor = -kappa / (double(4 * Nd));
 
     for (int mu = 0; mu < Nd; mu++) {
-      GaugeLinkField der_mu(der._grid);
+      GaugeLinkField der_mu(der.Grid());
       der_mu = zero;
       for (int nu = 0; nu < Nd; nu++) {
         GaugeLinkField left_nu = PeekIndex<LorentzIndex>(left, nu);
@@ -168,7 +168,7 @@ public:
   }
 
   void MSquareRoot(GaugeField& P){
-    GaugeField Gp(P._grid);
+    GaugeField Gp(P.Grid());
     HermitianLinearOperator<LaplacianAdjointField<Impl>,GaugeField> HermOp(*this);
     ConjugateGradientMultiShift<GaugeField> msCG(param.MaxIter,PowerHalf);
     msCG(HermOp,P,Gp);
@@ -176,7 +176,7 @@ public:
   }
 
   void MInvSquareRoot(GaugeField& P){
-    GaugeField Gp(P._grid);
+    GaugeField Gp(P.Grid());
     HermitianLinearOperator<LaplacianAdjointField<Impl>,GaugeField> HermOp(*this);
     ConjugateGradientMultiShift<GaugeField> msCG(param.MaxIter,PowerInvHalf);
     msCG(HermOp,P,Gp);

lib/qcd/utils/GaugeFix.h

@@ -52,7 +52,7 @@ public:
     }
   }  
   static void SteepestDescentGaugeFix(GaugeLorentz &Umu,Real & alpha,int maxiter,Real Omega_tol, Real Phi_tol,bool Fourier=false) {
-    GridBase *grid = Umu._grid;
+    GridBase *grid = Umu.Grid();
 
     Real org_plaq      =WilsonLoops<Gimpl>::avgPlaquette(Umu);
     Real org_link_trace=WilsonLoops<Gimpl>::linkTrace(Umu); 
@@ -97,7 +97,7 @@ public:
     }
   };
   static Real SteepestDescentStep(std::vector<GaugeMat> &U,Real & alpha, GaugeMat & dmuAmu) {
-    GridBase *grid = U[0]._grid;
+    GridBase *grid = U[0].Grid();
 
     std::vector<GaugeMat> A(Nd,grid);
     GaugeMat g(grid);
@@ -116,7 +116,7 @@ public:
 
   static Real FourierAccelSteepestDescentStep(std::vector<GaugeMat> &U,Real & alpha, GaugeMat & dmuAmu) {
 
-    GridBase *grid = U[0]._grid;
+    GridBase *grid = U[0].Grid();
 
     Real vol = grid->gSites();
 
@@ -179,7 +179,7 @@ public:
   }
 
   static void ExpiAlphaDmuAmu(const std::vector<GaugeMat> &A,GaugeMat &g,Real & alpha, GaugeMat &dmuAmu) {
-    GridBase *grid = g._grid;
+    GridBase *grid = g.Grid();
     Complex cialpha(0.0,-alpha);
     GaugeMat ciadmam(grid);
     DmuAmu(A,dmuAmu);

lib/qcd/utils/LinalgUtils.h

@@ -45,7 +45,7 @@ void axpibg5x(Lattice<vobj> &z,const Lattice<vobj> &x,Coeff a,Coeff b)
   z.Checkerboard() = x.Checkerboard();
   conformable(x,z);
 
-  GridBase *grid=x._grid;
+  GridBase *grid=x.Grid();
 
   Gamma G5(Gamma::Algebra::Gamma5);
   parallel_for(int ss=0;ss<grid->oSites();ss++){
@@ -62,7 +62,7 @@ void axpby_ssp(Lattice<vobj> &z, Coeff a,const Lattice<vobj> &x,Coeff b,const La
   z.Checkerboard() = x.Checkerboard();
   conformable(x,y);
   conformable(x,z);
-  GridBase *grid=x._grid;
+  GridBase *grid=x.Grid();
   int Ls = grid->_rdimensions[0];
   parallel_for(int ss=0;ss<grid->oSites();ss+=Ls){ // adds Ls
     vobj tmp = a*x[ss+s]+b*y[ss+sp];
@@ -76,7 +76,7 @@ void ag5xpby_ssp(Lattice<vobj> &z,Coeff a,const Lattice<vobj> &x,Coeff b,const L
   z.Checkerboard() = x.Checkerboard();
   conformable(x,y);
   conformable(x,z);
-  GridBase *grid=x._grid;
+  GridBase *grid=x.Grid();
   int Ls = grid->_rdimensions[0];
 
   Gamma G5(Gamma::Algebra::Gamma5);
@@ -94,7 +94,7 @@ void axpbg5y_ssp(Lattice<vobj> &z,Coeff a,const Lattice<vobj> &x,Coeff b,const L
   z.Checkerboard() = x.Checkerboard();
   conformable(x,y);
   conformable(x,z);
-  GridBase *grid=x._grid;
+  GridBase *grid=x.Grid();
   int Ls = grid->_rdimensions[0];
   Gamma G5(Gamma::Algebra::Gamma5);
   parallel_for(int ss=0;ss<grid->oSites();ss+=Ls){ // adds Ls
@@ -111,7 +111,7 @@ void ag5xpbg5y_ssp(Lattice<vobj> &z,Coeff a,const Lattice<vobj> &x,Coeff b,const
   z.Checkerboard() = x.Checkerboard();
   conformable(x,y);
   conformable(x,z);
-  GridBase *grid=x._grid;
+  GridBase *grid=x.Grid();
   int Ls = grid->_rdimensions[0];
 
   Gamma G5(Gamma::Algebra::Gamma5);
@@ -130,7 +130,7 @@ void axpby_ssp_pminus(Lattice<vobj> &z,Coeff a,const Lattice<vobj> &x,Coeff b,co
   z.Checkerboard() = x.Checkerboard();
   conformable(x,y);
   conformable(x,z);
-  GridBase *grid=x._grid;
+  GridBase *grid=x.Grid();
   int Ls = grid->_rdimensions[0];
   parallel_for(int ss=0;ss<grid->oSites();ss+=Ls){ // adds Ls
     vobj tmp;
@@ -146,7 +146,7 @@ void axpby_ssp_pplus(Lattice<vobj> &z,Coeff a,const Lattice<vobj> &x,Coeff b,con
   z.Checkerboard() = x.Checkerboard();
   conformable(x,y);
   conformable(x,z);
-  GridBase *grid=x._grid;
+  GridBase *grid=x.Grid();
   int Ls = grid->_rdimensions[0];
   parallel_for(int ss=0;ss<grid->oSites();ss+=Ls){ // adds Ls
     vobj tmp;
@@ -159,7 +159,7 @@ void axpby_ssp_pplus(Lattice<vobj> &z,Coeff a,const Lattice<vobj> &x,Coeff b,con
 template<class vobj> 
 void G5R5(Lattice<vobj> &z,const Lattice<vobj> &x)
 {
-  GridBase *grid=x._grid;
+  GridBase *grid=x.Grid();
   z.Checkerboard() = x.Checkerboard();
   conformable(x,z);
   int Ls = grid->_rdimensions[0];

lib/qcd/utils/Metric.h

@@ -107,7 +107,7 @@ public:
     if (1) {
       // Auxiliary momenta
       // do nothing if trivial, so hide in the metric
-      MomentaField AuxMomTemp(Mom._grid);
+      MomentaField AuxMomTemp(Mom.Grid());
       Implementation::generate_momenta(AuxMom, pRNG);
       Implementation::generate_momenta(AuxField, pRNG);
       // Modify the distribution with the metric
@@ -118,10 +118,10 @@ public:
 
   // Correct
   RealD MomentaAction(){
-    MomentaField inv(Mom._grid);
+    MomentaField inv(Mom.Grid());
     inv = zero;
     M.Minv(Mom, inv);
-    LatticeComplex Hloc(Mom._grid);
+    LatticeComplex Hloc(Mom.Grid());
     Hloc = zero;
     for (int mu = 0; mu < Nd; mu++) {
       // This is not very general
@@ -155,8 +155,8 @@ public:
 
     // Compute the derivative of the kinetic term
     // with respect to the gauge field
-    MomentaField MDer(in._grid);
+    MomentaField MDer(in.Grid());
-    MomentaField X(in._grid);
+    MomentaField X(in.Grid());
     X = zero;
     M.Minv(in, X);  // X = G in
     M.MDeriv(X, MDer);  // MDer = U * dS/dU
@@ -168,8 +168,8 @@ public:
     der = zero;
     if (1){
       // Auxiliary fields
-      MomentaField der_temp(der._grid);
+      MomentaField der_temp(der.Grid());
-      MomentaField X(der._grid);
+      MomentaField X(der.Grid());
       X=zero;
       //M.M(AuxMom, X); // X = M Aux
       // Two derivative terms
@@ -200,8 +200,8 @@ public:
 
   void update_auxiliary_fields(RealD ep){
     if (1) {
-      MomentaField tmp(AuxMom._grid);
+      MomentaField tmp(AuxMom.Grid());
-      MomentaField tmp2(AuxMom._grid);
+      MomentaField tmp2(AuxMom.Grid());
       M.M(AuxMom, tmp);
       // M.M(tmp, tmp2);
       AuxField += ep * tmp;  // M^2 AuxMom

lib/qcd/utils/SUn.h

@@ -217,7 +217,7 @@ public:
                          Lattice<iSU2Matrix<vcplx> > &subgroup,
                          const Lattice<iSUnMatrix<vcplx> > &source,
                          int su2_index) {
-    GridBase *grid(source._grid);
+    GridBase *grid(source.Grid());
     conformable(subgroup, source);
     conformable(subgroup, Determinant);
     int i0, i1;
@@ -247,7 +247,7 @@ public:
   template <class vcplx>
   static void su2Insert(const Lattice<iSU2Matrix<vcplx> > &subgroup,
                         Lattice<iSUnMatrix<vcplx> > &dest, int su2_index) {
-    GridBase *grid(dest._grid);
+    GridBase *grid(dest.Grid());
     conformable(subgroup, dest);
     int i0, i1;
     su2SubGroupIndex(i0, i1, su2_index);
@@ -277,7 +277,7 @@ public:
 			       LatticeMatrix &link,
 			       const LatticeMatrix &barestaple,  // multiplied by action coeffs so th
 			       int su2_subgroup, int nheatbath, LatticeInteger &wheremask) {
-    GridBase *grid = link._grid;
+    GridBase *grid = link.Grid();
 
     const RealD twopi = 2.0 * M_PI;
 
@@ -604,7 +604,7 @@ public:
   template <typename LatticeMatrixType>
   static void LieRandomize(GridParallelRNG &pRNG, LatticeMatrixType &out,
                            double scale = 1.0) {
-    GridBase *grid = out._grid;
+    GridBase *grid = out.Grid();
 
     typedef typename LatticeMatrixType::vector_type vector_type;
     typedef typename LatticeMatrixType::scalar_type scalar_type;
@@ -641,7 +641,7 @@ public:
   static void GaussianFundamentalLieAlgebraMatrix(GridParallelRNG &pRNG,
                                                   LatticeMatrix &out,
                                                   Real scale = 1.0) {
-    GridBase *grid = out._grid;
+    GridBase *grid = out.Grid();
     LatticeReal ca(grid);
     LatticeMatrix la(grid);
     Complex ci(0.0, scale);
@@ -661,7 +661,7 @@ public:
                                           LatticeMatrix &out,
                                           Real scale = 1.0) {
     conformable(h, out);
-    GridBase *grid = out._grid;
+    GridBase *grid = out.Grid();
     LatticeMatrix la(grid);
     Matrix ta;
 
@@ -678,8 +678,8 @@ public:
 
   template<typename GaugeField,typename GaugeMat>
   static void GaugeTransform( GaugeField &Umu, GaugeMat &g){
-    GridBase *grid = Umu._grid;
+    GridBase *grid = Umu.Grid();
-    conformable(grid,g._grid);
+    conformable(grid,g.Grid());
 
     GaugeMat U(grid);
     GaugeMat ag(grid); ag = adj(g);
@@ -692,7 +692,7 @@ public:
   }
   template<typename GaugeMat>
   static void GaugeTransform( std::vector<GaugeMat> &U, GaugeMat &g){
-    GridBase *grid = g._grid;
+    GridBase *grid = g.Grid();
     GaugeMat ag(grid); ag = adj(g);
     for(int mu=0;mu<Nd;mu++){
       U[mu] = g*U[mu]*Cshift(ag, mu, 1);
@@ -724,7 +724,7 @@ public:
     typedef iSUnMatrix<vector_type> vMatrixType;
     typedef Lattice<vMatrixType> LatticeMatrixType;
 
-    LatticeMatrixType Umu(out._grid);
+    LatticeMatrixType Umu(out.Grid());
     for (int mu = 0; mu < Nd; mu++) {
       LieRandomize(pRNG, Umu, 1.0);
       PokeIndex<LorentzIndex>(out, Umu, mu);
@@ -736,7 +736,7 @@ public:
     typedef iSUnMatrix<vector_type> vMatrixType;
     typedef Lattice<vMatrixType> LatticeMatrixType;
 
-    LatticeMatrixType Umu(out._grid);
+    LatticeMatrixType Umu(out.Grid());
     for(int mu=0;mu<Nd;mu++){
       LieRandomize(pRNG,Umu,0.01);
       PokeIndex<LorentzIndex>(out,Umu,mu);
@@ -748,7 +748,7 @@ public:
     typedef iSUnMatrix<vector_type> vMatrixType;
     typedef Lattice<vMatrixType> LatticeMatrixType;
 
-    LatticeMatrixType Umu(out._grid);
+    LatticeMatrixType Umu(out.Grid());
     Umu=1.0;
     for(int mu=0;mu<Nd;mu++){
       PokeIndex<LorentzIndex>(out,Umu,mu);
@@ -767,7 +767,7 @@ public:
   static void taExp(const LatticeMatrixType &x, LatticeMatrixType &ex) {
     typedef typename LatticeMatrixType::scalar_type ComplexType;
 
-    LatticeMatrixType xn(x._grid);
+    LatticeMatrixType xn(x.Grid());
     RealD nfac = 1.0;
 
     xn = x;

lib/qcd/utils/SUnAdjoint.h

@@ -114,7 +114,7 @@ public:
 				      const typename SU<ncolour>::LatticeAlgebraVector &h,
 				      LatticeAdjMatrix &out, Real scale = 1.0) {
     conformable(h, out);
-    GridBase *grid = out._grid;
+    GridBase *grid = out.Grid();
     LatticeAdjMatrix la(grid);
     AMatrix iTa;
 

lib/qcd/utils/SUnTwoIndex.h

@@ -199,7 +199,7 @@ public:
 				       const typename SU<ncolour>::LatticeAlgebraVector &h,
 				       LatticeTwoIndexMatrix &out, Real scale = 1.0) {
     conformable(h, out);
-    GridBase *grid = out._grid;
+    GridBase *grid = out.Grid();
     LatticeTwoIndexMatrix la(grid);
     TIMatrix i2indTa;
 

lib/qcd/utils/ScalarObjs.h

@@ -67,7 +67,7 @@ public:
   //////////////////////////////////////////////////
 
   static RealD sumphider(const typename Impl::Field &f) {
-    typename Impl::Field tmp(f._grid);
+    typename Impl::Field tmp(f.Grid());
     tmp = Cshift(f, 0, -1) * f;
     for (int mu = 1; mu < Nd; mu++) {
       tmp += Cshift(f, mu, -1) * f;
@@ -76,13 +76,13 @@ public:
   }
 
   static RealD sumphisquared(const typename Impl::Field &f) {
-    typename Impl::Field tmp(f._grid);
+    typename Impl::Field tmp(f.Grid());
     tmp = f * f;
     return sum(trace(tmp));
   }
 
   static RealD sumphifourth(const typename Impl::Field &f) {
-    typename Impl::Field tmp(f._grid);
+    typename Impl::Field tmp(f.Grid());
     phifourth(tmp, f);
     return sum(trace(tmp));
   }

lib/qcd/utils/WilsonLoops.h

@@ -76,7 +76,7 @@ public:
   static void traceDirPlaquette(ComplexField &plaq,
                                 const std::vector<GaugeMat> &U, const int mu,
                                 const int nu) {
-    GaugeMat sp(U[0]._grid);
+    GaugeMat sp(U[0].Grid());
     dirPlaquette(sp, U, mu, nu);
     plaq = trace(sp);
   }
@@ -85,7 +85,7 @@ public:
   //////////////////////////////////////////////////
   static void sitePlaquette(ComplexField &Plaq,
                             const std::vector<GaugeMat> &U) {
-    ComplexField sitePlaq(U[0]._grid);
+    ComplexField sitePlaq(U[0].Grid());
     Plaq = zero;
     for (int mu = 1; mu < Nd; mu++) {
       for (int nu = 0; nu < mu; nu++) {
@@ -98,13 +98,13 @@ public:
   // sum over all x,y,z,t and over all planes of plaquette
   //////////////////////////////////////////////////
   static RealD sumPlaquette(const GaugeLorentz &Umu) {
-    std::vector<GaugeMat> U(Nd, Umu._grid);
+    std::vector<GaugeMat> U(Nd, Umu.Grid());
     // inefficient here
     for (int mu = 0; mu < Nd; mu++) {
       U[mu] = PeekIndex<LorentzIndex>(Umu, mu);
     }
 
-    ComplexField Plaq(Umu._grid);
+    ComplexField Plaq(Umu.Grid());
 
     sitePlaquette(Plaq, U);
     auto Tp = sum(Plaq);
@@ -118,7 +118,7 @@ public:
   //////////////////////////////////////////////////
   static RealD avgPlaquette(const GaugeLorentz &Umu) {
     RealD sumplaq = sumPlaquette(Umu);
-    double vol = Umu._grid->gSites();
+    double vol = Umu.Grid()->gSites();
     double faces = (1.0 * Nd * (Nd - 1)) / 2.0;
     return sumplaq / vol / faces / Nc; // Nd , Nc dependent... FIXME
   }
@@ -127,9 +127,9 @@ public:
   // average over traced single links
   //////////////////////////////////////////////////
   static RealD linkTrace(const GaugeLorentz &Umu) {
-    std::vector<GaugeMat> U(Nd, Umu._grid);
+    std::vector<GaugeMat> U(Nd, Umu.Grid());
 
-    ComplexField Tr(Umu._grid);
+    ComplexField Tr(Umu.Grid());
     Tr = zero;
     for (int mu = 0; mu < Nd; mu++) {
       U[mu] = PeekIndex<LorentzIndex>(Umu, mu);
@@ -139,7 +139,7 @@ public:
     auto Tp = sum(Tr);
     auto p = TensorRemove(Tp);
 
-    double vol = Umu._grid->gSites();
+    double vol = Umu.Grid()->gSites();
 
     return p.real() / vol / 4.0 / 3.0;
   };
@@ -150,7 +150,7 @@ public:
   static void Staple(GaugeMat &staple, const GaugeLorentz &Umu, int mu,
                      int nu) {
 
-    GridBase *grid = Umu._grid;
+    GridBase *grid = Umu.Grid();
 
     std::vector<GaugeMat> U(Nd, grid);
     for (int d = 0; d < Nd; d++) {
@@ -191,7 +191,7 @@ public:
 
   // For the force term
   static void StapleMult(GaugeMat &staple, const GaugeLorentz &Umu, int mu) {
-    GridBase *grid = Umu._grid;
+    GridBase *grid = Umu.Grid();
     std::vector<GaugeMat> U(Nd, grid);
     for (int d = 0; d < Nd; d++) {
       // this operation is taking too much time
@@ -219,7 +219,7 @@ public:
   //////////////////////////////////////////////////
   static void Staple(GaugeMat &staple, const GaugeLorentz &Umu, int mu) {
 
-    GridBase *grid = Umu._grid;
+    GridBase *grid = Umu.Grid();
 
     std::vector<GaugeMat> U(Nd, grid);
     for (int d = 0; d < Nd; d++) {
@@ -266,7 +266,7 @@ public:
   static void StapleUpper(GaugeMat &staple, const GaugeLorentz &Umu, int mu,
                           int nu) {
     if (nu != mu) {
-      GridBase *grid = Umu._grid;
+      GridBase *grid = Umu.Grid();
 
       std::vector<GaugeMat> U(Nd, grid);
       for (int d = 0; d < Nd; d++) {
@@ -297,7 +297,7 @@ public:
   static void StapleLower(GaugeMat &staple, const GaugeLorentz &Umu, int mu,
                           int nu) {
     if (nu != mu) {
-      GridBase *grid = Umu._grid;
+      GridBase *grid = Umu.Grid();
 
       std::vector<GaugeMat> U(Nd, grid);
       for (int d = 0; d < Nd; d++) {
@@ -329,7 +329,7 @@ public:
     //     |     |     |     |
     //     +--<--+     +--<--+
 
-    GaugeMat Vup(Umu._grid), Vdn(Umu._grid);
+    GaugeMat Vup(Umu.Grid()), Vdn(Umu.Grid());
     StapleUpper(Vup, Umu, mu, nu);
     StapleLower(Vdn, Umu, mu, nu);
     GaugeMat v = Vup - Vdn;
@@ -342,13 +342,13 @@ public:
     // 4d topological charge
     assert(Nd==4);
     // Bx = -iF(y,z), By = -iF(z,y), Bz = -iF(x,y)
-    GaugeMat Bx(U._grid), By(U._grid), Bz(U._grid);
+    GaugeMat Bx(U.Grid()), By(U.Grid()), Bz(U.Grid());
     FieldStrength(Bx, U, Ydir, Zdir);
     FieldStrength(By, U, Zdir, Xdir);
     FieldStrength(Bz, U, Xdir, Ydir);
 
     // Ex = -iF(t,x), Ey = -iF(t,y), Ez = -iF(t,z)
-    GaugeMat Ex(U._grid), Ey(U._grid), Ez(U._grid);
+    GaugeMat Ex(U.Grid()), Ey(U.Grid()), Ez(U.Grid());
     FieldStrength(Ex, U, Tdir, Xdir);
     FieldStrength(Ey, U, Tdir, Ydir);
     FieldStrength(Ez, U, Tdir, Zdir);
@@ -378,13 +378,13 @@ public:
   static void traceDirRectangle(ComplexField &rect,
                                 const std::vector<GaugeMat> &U, const int mu,
                                 const int nu) {
-    GaugeMat sp(U[0]._grid);
+    GaugeMat sp(U[0].Grid());
     dirRectangle(sp, U, mu, nu);
     rect = trace(sp);
   }
   static void siteRectangle(ComplexField &Rect,
                             const std::vector<GaugeMat> &U) {
-    ComplexField siteRect(U[0]._grid);
+    ComplexField siteRect(U[0].Grid());
     Rect = zero;
     for (int mu = 1; mu < Nd; mu++) {
       for (int nu = 0; nu < mu; nu++) {
@@ -398,13 +398,13 @@ public:
   // sum over all x,y,z,t and over all planes of plaquette
   //////////////////////////////////////////////////
   static RealD sumRectangle(const GaugeLorentz &Umu) {
-    std::vector<GaugeMat> U(Nd, Umu._grid);
+    std::vector<GaugeMat> U(Nd, Umu.Grid());
 
     for (int mu = 0; mu < Nd; mu++) {
       U[mu] = PeekIndex<LorentzIndex>(Umu, mu);
     }
 
-    ComplexField Rect(Umu._grid);
+    ComplexField Rect(Umu.Grid());
 
     siteRectangle(Rect, U);
 
@@ -419,7 +419,7 @@ public:
 
     RealD sumrect = sumRectangle(Umu);
 
-    double vol = Umu._grid->gSites();
+    double vol = Umu.Grid()->gSites();
 
     double faces = (1.0 * Nd * (Nd - 1)); // 2 distinct orientations summed
 
@@ -445,7 +445,7 @@ public:
 
     Stap = zero;
 
-    GridBase *grid = U[0]._grid;
+    GridBase *grid = U[0].Grid();
 
     GaugeMat Staple2x1(grid);
     GaugeMat tmp(grid);
@@ -522,7 +522,7 @@ public:
 
   static void RectStapleUnoptimised(GaugeMat &Stap, const GaugeLorentz &Umu,
                                     int mu) {
-    GridBase *grid = Umu._grid;
+    GridBase *grid = Umu.Grid();
 
     std::vector<GaugeMat> U(Nd, grid);
     for (int d = 0; d < Nd; d++) {

lib/stencil/Stencil.h

@@ -82,7 +82,7 @@ void Gather_plane_exchange_table(std::vector<std::pair<int,int> >& table,const L
 {
   assert( (table.size()&0x1)==0);
   int num=table.size()/2;
-  int so  = plane*rhs._grid->_ostride[dimension]; // base offset for start of plane 
+  int so  = plane*rhs.Grid()->_ostride[dimension]; // base offset for start of plane 
   parallel_for(int j=0;j<num;j++){
     compress.CompressExchange(&pointers[0][0],&pointers[1][0],&rhs[0],
 			      j,so+table[2*j].second,so+table[2*j+1].second,type);
@@ -141,8 +141,10 @@ public:
   
   int                               _checkerboard;
   int                               _npoints; // Move to template param?
+protected:
   GridBase *                        _grid;
-  
+public: 
+  GridBase *Grid(void) const { return _grid; }
   // npoints of these
   std::vector<int>                  _directions;
   std::vector<int>                  _distances;
@@ -436,8 +438,8 @@ public:
     _grid->StencilBarrier();// Synch shared memory on a single nodes
     mpi3synctime_g+=usecond();
 
-    // conformable(source._grid,_grid);
+    // conformable(source.Grid(),_grid);
-    assert(source._grid==_grid);
+    assert(source.Grid()==_grid);
     halogtime-=usecond();
     
     u_comm_offset=0;
@@ -864,8 +866,8 @@ public:
     typedef typename cobj::vector_type vector_type;
     typedef typename cobj::scalar_type scalar_type;
     
-    assert(rhs._grid==_grid);
+    assert(rhs.Grid()==_grid);
-    //	  conformable(_grid,rhs._grid);
+    //	  conformable(_grid,rhs.Grid());
     
     int fd              = _grid->_fdimensions[dimension];
     int rd              = _grid->_rdimensions[dimension];
@@ -895,7 +897,7 @@ public:
 	
 	int bytes =  words * compress.CommDatumSize();
 	
-	int so  = sx*rhs._grid->_ostride[dimension]; // base offset for start of plane 
+	int so  = sx*rhs.Grid()->_ostride[dimension]; // base offset for start of plane 
 	if ( !face_table_computed ) {
 	  face_table.resize(face_idx+1);
 	  Gather_plane_table_compute ((GridBase *)_grid,dimension,sx,cbmask,u_comm_offset,face_table[face_idx]);

tests/Test_stencil.cc

@@ -103,7 +103,7 @@ int main(int argc, char ** argv) {
 	Bar = Cshift(Foo,dir,disp);
 
 	// Implement a stencil code that should agree with cshift!
-	for(int i=0;i<Check._grid->oSites();i++){
+	for(int i=0;i<Check.Grid()->oSites();i++){
 	  
 	  int permute_type;
 	  StencilEntry *SE;
@@ -200,7 +200,7 @@ int main(int argc, char ** argv) {
 
 	// Implement a stencil code that should agree with that darn cshift!
 	EStencil.HaloExchange(EFoo,compress);
-	for(int i=0;i<OCheck._grid->oSites();i++){
+	for(int i=0;i<OCheck.Grid()->oSites();i++){
 	  int permute_type;
 	  StencilEntry *SE;
 	  SE = EStencil.GetEntry(permute_type,0,i);
@@ -214,7 +214,7 @@ int main(int argc, char ** argv) {
 	    OCheck[i] = EStencil.CommBuf()[SE->_offset];
 	}
 	OStencil.HaloExchange(OFoo,compress);
-	for(int i=0;i<ECheck._grid->oSites();i++){
+	for(int i=0;i<ECheck.Grid()->oSites();i++){
 	  int permute_type;
 	  StencilEntry *SE;
 	  SE = OStencil.GetEntry(permute_type,0,i);