/// <summary>
/// Expand this datastore value access into a list of value access expressions
/// on scalar and multivector values
/// </summary>
/// <returns></returns>
public IEnumerable <AstDatastoreValueAccess> ExpandStructures()
{
return
(AssociatedValueAccess
.ExpandStructures()
.Select(item => new AstDatastoreValueAccess(item)));
}
/// <summary>
/// If this value access is a multivector this selects components belonging to the given subspace
/// into a new value access of the same multivector type
/// </summary>
/// <param name="grade"></param>
/// <param name="indexList"></param>
/// <returns></returns>
public AstDatastoreValueAccess SelectMultivectorComponents(int grade, IEnumerable <int> indexList)
{
if (IsFullMultivector)
{
var frame = TypeAsFrameMultivector.ParentFrame;
if (frame.IsValidGrade(grade) == false)
{
return(null);
}
var idsList = frame.BasisBladeIDsOfGrade(grade, indexList);
return
(AssociatedValueAccess
.Duplicate()
.Append(
ValueAccessStepByKeyList <int> .Create(
AssociatedValueAccess.ExpressionType,
idsList
)
)
.ToAstDatastoreValueAccess());
}
if (IsPartialMultivector)
{
var frame = TypeAsFrameMultivector.ParentFrame;
if (frame.IsValidGrade(grade) == false)
{
return(null);
}
var idsList = frame.BasisBladeIDsOfGrade(grade, indexList);
var oldIdsList = AssociatedValueAccess.GetBasisBladeIdsList();
var newIdsList = idsList.Where(id => oldIdsList.Contains(id)).ToArray();
if (newIdsList.Length == 0)
{
return(null);
}
return
(AssociatedValueAccess
.DuplicateExceptLast()
.Append(
ValueAccessStepByKeyList <int> .Create(
AssociatedValueAccess.ExpressionType,
newIdsList
)
)
.ToAstDatastoreValueAccess());
}
return(null);
}
/// <summary>
/// If this value access is on a partial multivector coefficients list, split this value access into
/// two parts: A value access on the multivector type and a list of basis blades
/// </summary>
/// <returns></returns>
public Tuple <AstDatastoreValueAccess, List <AstFrameBasisBlade> > SplitAs_PartialMultivector()
{
var idsList = AssociatedValueAccess.GetBasisBladeIdsList();
if (idsList == null)
{
return(null);
}
var frame = AssociatedValueAccess.LastAccessStep.AccessStepType.GetFrame();
var newValueAccess = AssociatedValueAccess.DuplicateExceptLast();
return(new Tuple <AstDatastoreValueAccess, List <AstFrameBasisBlade> >(
new AstDatastoreValueAccess(newValueAccess),
idsList.Select(id => new AstFrameBasisBlade(frame, id)).ToList()
));
}
/// <summary>
/// If this value access is on a multivector coefficient, split this value access into two parts:
/// A value access on the multivector type and a basis blade
/// </summary>
/// <returns></returns>
public Tuple <AstDatastoreValueAccess, AstFrameBasisBlade> SplitAs_MultivectorCoefficient()
{
var id = AssociatedValueAccess.GetBasisBladeId();
if (id < 0)
{
return(null);
}
var frame = AssociatedValueAccess.LastAccessStep.AccessStepType.GetFrame();
var newValueAccess = AssociatedValueAccess.DuplicateExceptLast();
return(new Tuple <AstDatastoreValueAccess, AstFrameBasisBlade>(
new AstDatastoreValueAccess(newValueAccess),
new AstFrameBasisBlade(frame, id)
));
}
public override string ToString()
{
return(AssociatedValueAccess.GetName());
}
/// <summary>
/// If this value access is on a multivector partial coefficients access,
/// get the basis blades IDs of the coefficients
/// </summary>
/// <returns></returns>
public List <int> GetBasisBladeIDsList()
{
var idsList = AssociatedValueAccess.GetBasisBladeIdsList();
return(idsList == null ? null : new List <int>(idsList));
}
/// <summary>
/// If this value access is on a multivector coefficient, get the ID of the basis blade
/// </summary>
/// <returns></returns>
public int GetBasisBladeId()
{
return(AssociatedValueAccess.GetBasisBladeId());
}
