LELAttribute.h

The Lattice Expression Language letter classes provide expression objects. There is ancilliary information or attributes associated with these objects:

Scalar or lattice (i.e. array) or region.
In case of an array, is it a reduced array. I.e. is it an array that has to be calculated beforehand (e.g. partialMax). A scalar is always reduced.
Shape and tile shape of a lattice. This can be undefined.
Is the lattice masked?
Optionally coordinates of the lattice.

Two attribute objects can be combined mirroring the combination of two expressions (like the addition of two lattices). Regions cannot be combined.

Member Description

LELAttribute()

Default constructor sets it as a scalar.

LELAttribute(Bool isMasked, const IPosition& shape, const IPosition& tileShape, const LELCoordinates& coordinates, Bool isReduced = False)

Constructor sets it as lattice with given attributes. An empty shape indicates that the shape is not known.

explicit LELAttribute(uInt regionNdim)

Constructor sets it as a region with given attributes.

LELAttribute(const LELAttribute& attr)

Copy constructor (copy semantics)

LELAttribute(const LELAttribute& attrLeft, const LELAttribute& attrRight, Bool matchAxes = True)

Constructor that combines the two attributes given. An array can be combined with a scalar. If matchAxes is True and if two arrays are given, the shapes and coordinates have to match exactly, otherwise one can be a subset of the other (and LEL will auto-extend).