IDL specification for the SMG structured multigrid preconditioner from hypre

package hypre {

class stencil {

static stencil NewStencil(in int dim, in int size);

int SetStencilElement(in int index, in array<int> offset);

};

class grid {

static grid NewGrid(in mpi_com com, in int dimension);

int SetGridExtents(inout array<int> lower, array<int> upper);

};

class vector {

static vector NewVector(in mpi_com, in grid g, in stencil s);

int SetVectorBoxValues(/* long argument list omitted */);

};

class matrix { /* matrix member functions omitted */ };

class smg_solver {

int Setup(inout matrix A, inout vector b, inout vector x);

int Solve(inout matrix A, inout vector b, inout vector x);

};

);