Package org.qdl_lang.expressions

Class ANode2

java.lang.Object

org.qdl_lang.expressions.ExpressionImpl

org.qdl_lang.expressions.ANode2

All Implemented Interfaces:

Serializable, ExpressionNode, ExpressionInterface, HasResultInterface, Statement

public class ANode2
extends ExpressionImpl

Very much improved way to handle assignments. Use this

Created by Jeff Gaynor
on 6/3/21 at 5:10 AM

See Also:

Serialized Form

Field Summary

Fields

Modifier and Type	Field	Description
static int	leftAssignmentType
static int	rightAssignmentType

Fields inherited from class org.qdl_lang.expressions.ExpressionImpl

arguments, result, valence

Fields inherited from interface org.qdl_lang.statements.ExpressionInterface

ALL_INDICES_NODE, ALT_IF_NODE, ASSIGNMENT_NODE, AXIS_RESTRICTION_NODE, CLOSED_SLICE_NODE, COMPARISON_DYAD_NODE, CONSTANT_NODE, DYAD_NODE, DYADIC_FUNCTION_REFERENCE_NODE, EXPRESSION_STEM_NODE, EXPRESSION_STEM2_NODE, FUNCTION_REFERENCE_NODE, LAMBDA_DEFINITION_NODE, LIST_NODE, MODULE_NODE, MONAD_NODE, NILAD_NODE, OPEN_SLICE_NODE, PARENTHESIZED_NODE, PARSE_EXPRESSION_BLOCK_NODE, PARSE_STATEMENT_BLOCK_NODE, POLYAD_NODE, QDL_NULL_NODE, SELECT_NODE, SET_NODE, STEM_ENTRY_NODE, STEM_EXTRACTION_NODE, STEM_NODE, UNKNOWN_NODE, VARIABLE_NODE

Constructor Summary

Constructors

Constructor	Description
ANode2(TokenPosition tokenPosition)

Method Summary

Modifier and Type	Method	Description
QDLValue	evaluate(State state)
int	getAssignmentType()
ExpressionInterface	getLeftArg()
int	getNodeType()	QDL is not strongly typed but Java is, so each node type should have a unique integer and conditionals should use that, not the instanceof operator.
String	getOp()
ExpressionInterface	getRightArg()
TokenPosition	getTokenPosition()
boolean	hasLeftArg()
boolean	hasRightArg()
boolean	hasTokenPosition()
ExpressionInterface	makeCopy()
protected QDLStem	resultToStem()	if the RHS is a stem, return it.
void	setLeftArg(ExpressionInterface leftArg)
void	setOp(String op)
void	setRightArg(ExpressionInterface rightArg)
void	setTokenPosition(TokenPosition tokenPosition)	Set the location of this token from the parser.
protected void	setValueFromSWRI(ExpressionInterface swri, Object value, Object i, State state)
String	toString()

Methods inherited from class org.qdl_lang.expressions.ExpressionImpl

addArgument, evalArg, evalLastArg, evaluatedArgs, getAlias, getArgAt, getArgCount, getArguments, getEvaluatedArgs, getLastArg, getOperatorType, getResult, getResultType, getSourceCode, hasAlias, hasEvaluatedArgs, isEvaluated, isSizeQuery, setAlias, setArguments, setEvaluated, setEvaluatedArgs, setOperatorType, setResult, setResult, setSizeQuery, setSourceCode

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait

Field Detail

leftAssignmentType

public static final int leftAssignmentType

See Also:

Constant Field Values

rightAssignmentType

public static final int rightAssignmentType

See Also:

Constant Field Values

Constructor Detail

ANode2

public ANode2(TokenPosition tokenPosition)

Method Detail

setTokenPosition

public void setTokenPosition(TokenPosition tokenPosition)

Description copied from interface: Statement

Set the location of this token from the parser. This is used for error notifications later.

Specified by:

setTokenPosition in interface Statement

Overrides:

setTokenPosition in class ExpressionImpl

getTokenPosition

public TokenPosition getTokenPosition()

Specified by:

getTokenPosition in interface Statement

Overrides:

getTokenPosition in class ExpressionImpl

hasTokenPosition

public boolean hasTokenPosition()

Specified by:

hasTokenPosition in interface Statement

Overrides:

hasTokenPosition in class ExpressionImpl

getOp

public String getOp()

setOp

public void setOp(String op)

getLeftArg

public ExpressionInterface getLeftArg()

setLeftArg

public void setLeftArg(ExpressionInterface leftArg)

getRightArg

public ExpressionInterface getRightArg()

setRightArg

public void setRightArg(ExpressionInterface rightArg)

hasLeftArg

public boolean hasLeftArg()

hasRightArg

public boolean hasRightArg()

evaluate

public QDLValue evaluate(State state)

setValueFromSWRI

protected void setValueFromSWRI(ExpressionInterface swri,
                                Object value,
                                Object i,
                                State state)

resultToStem

protected QDLStem resultToStem()

if the RHS is a stem, return it. If a scalar, return a stem with that has that as the default value.

Returns:

makeCopy

public ExpressionInterface makeCopy()

getAssignmentType

public int getAssignmentType()

toString

public String toString()

Overrides:

toString in class ExpressionImpl

getNodeType

public int getNodeType()

Description copied from interface: ExpressionInterface

QDL is not strongly typed but Java is, so each node type should have a unique integer and conditionals should use that, not the instanceof operator. This allows for efficient programming with switch statements rather than a bevy of conditionals (potentially each of which gets done even if the correct case has been handled).

Returns: