Package nz.org.riskscape.rl.ast

Class BinaryOperation

java.lang.Object

nz.org.riskscape.rl.ast.BinaryOperation

All Implemented Interfaces:

Expression

public class BinaryOperation
extends Object

Field Summary

Fields

Modifier and Type	Field	Description
static final Map<TokenTypes,TokenTypes>	NORMALIZED_TOKENS
static final List<EnumSet<?>>	PRIORITY

Constructor Summary

Constructors

Constructor	Description
BinaryOperation(Expression lhs, Token operator, Expression rhs)

Method Summary

Modifier and Type	Method	Description
<T, R> R	accept(ExpressionVisitor<T,R> visitor, T data)
protected void	appendSource(StringBuilder appendTo)	Implementers extend this to append their source to the given string builder.
protected boolean	canEqual(Object other)
boolean	equals(Object o)
Optional<Pair<Token,Token>>	getBoundary()
Expression	getLhs()
TokenTypes	getNormalizedOperator()
Token	getOperator()
Expression	getRhs()
int	hashCode()
final String	toSource()
final String	toString()

Methods inherited from class java.lang.Object

clone, finalize, getClass, notify, notifyAll, wait, wait, wait

Methods inherited from interface nz.org.riskscape.rl.ast.Expression

isA

Field Details

NORMALIZED_TOKENS

public static final Map<TokenTypes,TokenTypes> NORMALIZED_TOKENS

PRIORITY

public static final List<EnumSet<?>> PRIORITY

Constructor Details

BinaryOperation

public BinaryOperation(Expression lhs,
 Token operator,
 Expression rhs)

Method Details

appendSource

protected void appendSource(StringBuilder appendTo)

Implementers extend this to append their source to the given string builder. Done via string builder to encourage a more efficient implementation than is possible with concatenating multiple toString calls that typically contruct a string builder anyway.

getNormalizedOperator

public TokenTypes getNormalizedOperator()

Returns:

a 'normalized' TokenTypes for the given operator - it gives the non-keyword version of the operator, e.g. it will return OR instead of KEYWORD_OR

accept

public <T,
R> R accept(ExpressionVisitor<T,R> visitor,
 T data)

getBoundary

public Optional<Pair<Token,Token>> getBoundary()

Returns:

a pair of tokens that represent the start and end of this expression, to be used when giving users information about where errors have occurred. If the expression has been rebuilt then the boundary may be empty or it may be from the original expression. Intended for use in problems to trace errors back to their source.

equals

public boolean equals(Object o)

canEqual

protected boolean canEqual(Object other)

hashCode

public int hashCode()

getLhs

public Expression getLhs()

getOperator

public Token getOperator()

getRhs

public Expression getRhs()

toString

public final String toString()

Overrides:

toString in class Object

Returns:

the source, surrounded by the class name to make it easier to discern from a plane string among other debug output

toSource

public final String toSource()

Specified by:

toSource in interface Expression

Returns:

a normalized version of the AST that can be parsed to be exactly the same AST as this