Settings are passed as keyword arguments, just like BoomerAMG. The
Precond argument (corresponding to PCGSetPrecond) is handled separately,
and lets you pass another solver directly, instead of the solver
pointer, the setup and solve functions, as in the SetPrecond C function.
Example:
precond = BoomerAMG(; options...)
solver = PCG(; Precond = precond, options...)
This commits contains the solver interface:
A = HYPREMatrix(...)
b = HYPREVector(...)
x = HYPREVector(...)
solver = HYPRESolver(; options...)
solve!(solver, x, A, b)
where the abstract type HYPRESolver is replaced by a concrete solver
implementation (this commit includes the concrete
implementation/wrapping of BoomerAMG <: HYPRESolver).
Solver settings are passed as keyword arguments to the solver
constructor, cf. SetXXX functions in HYPRE.
For example, to create a BoomerAMG solver, and setting the tolerance:
solver = BoomerAMG(Tol = 1e-7)
Keyword argument names correspond directly to the solvers SetXXX
function in HYPRE; passing Tol corresponds to
HYPRE_BoomerAMGSetTol(solver, 1e-7).
Fredrik Ekre