casacore::TableExprNodeBinary Class Reference

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

#include <ExprNodeRep.h>

Inheritance diagram for casacore::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 void	getAggrNodes (vector< TableExprNodeRep * > &aggr)
	Get the nodes representing an aggregate function.
virtual void	getColumnNodes (vector< TableExprNodeRep * > &cols)
	Get the nodes representing a table column.
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, Bool adaptDataType=True)
	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)
	Make the units equal.
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 553 of file ExprNodeRep.h.

Constructor & Destructor Documentation

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

Constructor.

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

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

Destructor.

Member Function Documentation

void casacore::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 casacore::TableExprNodeRep.

Reimplemented in casacore::TableExprNodeINInt.

static TableExprNodeRep* casacore::TableExprNodeBinary::fillNode	(	TableExprNodeBinary *	thisNode,
		TableExprNodeRep *	left,
		TableExprNodeRep *	right,
		Bool	convertConstType,
		Bool	adaptDataType = `True`
	)			`[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. The operand data types can be adapted as needed.

virtual void casacore::TableExprNodeBinary::getAggrNodes ( vector< TableExprNodeRep * > & aggr ) [virtual]

Get the nodes representing an aggregate function.

Reimplemented in casacore::TableExprAggrNodeArray, casacore::TableExprFuncNodeArray, and casacore::TableExprUDFNodeArray.

virtual void casacore::TableExprNodeBinary::getColumnNodes ( vector< TableExprNodeRep * > & cols ) [virtual]

Get the nodes representing a table column.

Reimplemented in casacore::TableExprNodeColumn, casacore::TableExprFuncNodeArray, casacore::TableExprNodeArrayColumn, and casacore::TableExprUDFNodeArray.

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

Check the data types and get the common one.

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

Get the child nodes.

Definition at line 604 of file ExprNodeRep.h.

References lnode_p.

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

Definition at line 606 of file ExprNodeRep.h.

References rnode_p.

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