TAO interface (#143)

* TAO interface
* Firedrake tests
* OverloadedType / PETSc Vec conversion interface (ported from tlm_adjoint)
* Remove use of _ad_convert_type when defining bounds
* Apply scalar bounds using PETScVecInterface
* Use OptionsManager class from Firedrake, with very minor edits to remove Firedrake specifics

Co-authored-by: Daiane Iglesia Dolci <63597005+Ig-dolci@users.noreply.github.com>

pyadjoint/__init__.py

@@ -21,5 +21,6 @@
 from .optimization.optimization_problem import MinimizationProblem
 from .optimization.ipopt_solver import IPOPTSolver
 from .optimization.rol_solver import ROLSolver
+from .optimization.tao_solver import TAOSolver
 from .optimization.constraints import InequalityConstraint, EqualityConstraint
 from .optimization.moola_problem import MoolaOptimizationProblem

pyadjoint/adjfloat.py

@@ -130,6 +130,12 @@ def _ad_str(self):
         """Return the string of the taped value of this variable."""
         return str(self.block_variable.saved_output)
 
+    def _ad_to_petsc(self, vec=None):
+        raise NotImplementedError("_ad_to_petsc not implemented for AdjFloat.")
+
+    def _ad_from_petsc(self, vec):
+        raise NotImplementedError("_ad_from_petsc not implemented for AdjFloat.")
+
 
 _exp = math.exp
 _log = math.log