Ancillary information for the LEL letter classes. More...

#include <LELAttribute.h>

Public Member Functions
	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.
	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.
	~LELAttribute ()
	Destructor.
LELAttribute &	operator= (const LELAttribute &other)
	Assignment (copy semantics)
Bool	isScalar () const
	Is expression a scalar?
Bool	isReduced () const
	Is expression a reduced array? A scalar is always reduced.
Bool	isRegion () const
	Is expression a region?
Bool	isMasked () const
	Is the expression result masked?
const IPosition &	shape () const
	What is the shape of the expression?
const IPosition &	tileShape () const
	What is the tile shape of the expression?
const LELCoordinates &	coordinates () const
	What are the coordinates of the expression?
Int	compareCoord (const LELAttribute &other) const
	Compare the coordinates and shapes to see if this is a subset of other.
Private Attributes
Bool	isScalar_p
Bool	isReduced_p
Bool	isRegion_p
Bool	isMasked_p
IPosition	shape_p
IPosition	tileShape_p
LELCoordinates	coords_p

Detailed Description

Ancillary information for the LEL letter classes.

Intended use:

Internal

Review Status

Date Reviewed:: yyyy/mm/dd

Prerequisite

Etymology

Holds attribute information for the Lattice Expression Language letter classes.

Synopsis

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.

Definition at line 80 of file LELAttribute.h.

Constructor & Destructor Documentation

casa::LELAttribute::LELAttribute ( )

Default constructor sets it as a scalar.

casa::LELAttribute::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.

casa::LELAttribute::LELAttribute ( uInt regionNdim ) [explicit]

Constructor sets it as a region with given attributes.

casa::LELAttribute::LELAttribute ( const LELAttribute & attr )

Copy constructor (copy semantics)

casa::LELAttribute::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).

casa::LELAttribute::~LELAttribute ( )

Destructor.