Abstract base class for a node having 0, 1, or 2 child nodes. More...

#include <ExprNodeRep.h>

Inheritance diagram for casa::TableExprNodeBinary:

Public Member Functions
	TableExprNodeBinary (NodeDataType, ValueType, OperType, const Table &)
	Constructor.
	TableExprNodeBinary (NodeDataType, const TableExprNodeRep &, OperType)
virtual	~TableExprNodeBinary ()
	Destructor.
virtual void	show (ostream &, uInt indent) const
	Show the expression tree.
virtual Bool	isSingleValue () const
	Does the node result in a single value (for e.g.
virtual void	handleUnits ()
	Handle the units of the children and possibly set the parent's unit.
void	convertConstChild ()
	When one of the children is a constant, convert its data type to that of the other operand.
const TableExprNodeRep *	getLeftChild () const
	Get the child nodes.
const TableExprNodeRep *	getRightChild () const
Static Public Member Functions
static NodeDataType	getDT (NodeDataType leftDtype, NodeDataType rightDype, OperType operType)
	Check the data types and get the common one.
static TableExprNodeRep	getTypes (const TableExprNodeRep &left, const TableExprNodeRep &right, OperType operType)
	Check the data and value types and get the common one.
static TableExprNodeRep *	fillNode (TableExprNodeBinary thisNode, TableExprNodeRep left, TableExprNodeRep *right, Bool convertConstType)
	Link the children to the node and convert the children to constants if needed and possible.
Static Protected Member Functions
static const Unit &	makeEqualUnits (TableExprNodeRep left, TableExprNodeRep &right)

Protected Attributes
TableExprNodeRep *	lnode_p
TableExprNodeRep *	rnode_p

Detailed Description

Abstract base class for a node having 0, 1, or 2 child nodes.

Intended use:

Internal

Review Status

Reviewed By:: UNKNOWN
Date Reviewed:: before2004/08/25

Prerequisite

TableExprNodeRep

Etymology

TableExprNodeBinary is a node in the table expression tree representing a binary node (i.e. having 2 operands).

Synopsis

TableExprNodeBinary is the abstract base class for all nodes in a table expression tree using up to 2 operands. It is used as the base class for the node classes representing operator +, -, etc..

Motivation

This class contains the common functionality for the classes representing a binary (or unary) operator.

Definition at line 502 of file ExprNodeRep.h.

Constructor & Destructor Documentation

casa::TableExprNodeBinary::TableExprNodeBinary	(	NodeDataType	,
		ValueType	,
		OperType	,
		const Table &
	)

Constructor.

casa::TableExprNodeBinary::TableExprNodeBinary	(	NodeDataType	,
		const TableExprNodeRep &	,
		OperType
	)

virtual casa::TableExprNodeBinary::~TableExprNodeBinary ( ) [virtual]

Destructor.

Member Function Documentation

void casa::TableExprNodeBinary::convertConstChild ( ) [virtual]

When one of the children is a constant, convert its data type to that of the other operand.

This avoids that conversions are done for each get.

Reimplemented from casa::TableExprNodeRep.

static TableExprNodeRep* casa::TableExprNodeBinary::fillNode	(	TableExprNodeBinary *	thisNode,
		TableExprNodeRep *	left,
		TableExprNodeRep *	right,
		Bool	convertConstType
	)		`[static]`

Link the children to the node and convert the children to constants if needed and possible.

Also convert the node to constant if possible.

static NodeDataType casa::TableExprNodeBinary::getDT	(	NodeDataType	leftDtype,
		NodeDataType	rightDype,
		OperType	operType
	)		`[static]`

Check the data types and get the common one.

const TableExprNodeRep* casa::TableExprNodeBinary::getLeftChild ( ) const [inline]

Get the child nodes.

Definition at line 548 of file ExprNodeRep.h.

References lnode_p.

const TableExprNodeRep* casa::TableExprNodeBinary::getRightChild ( ) const [inline]

Definition at line 550 of file ExprNodeRep.h.

References rnode_p.

static TableExprNodeRep casa::TableExprNodeBinary::getTypes	(	const TableExprNodeRep &	left,
		const TableExprNodeRep &	right,
		OperType	operType
	)		`[static]`