Package org.scijava.parse

Class Operator

java.lang.Object

org.scijava.parse.Token

org.scijava.parse.Operator

All Implemented Interfaces:

java.lang.Comparable<Operator>

Direct Known Subclasses:

Function, Group

public class Operator
extends Token
implements java.lang.Comparable<Operator>

A mathematical operator is a "verb": a special infix (in the case of binary or greater arity) or prefix (in the case of unary) symbol which defines a relation between "nouns" (i.e.: literals and variables).

Author:

Curtis Rueden

Nested Class Summary

Nested Classes

Modifier and Type	Class	Description
static class	Operator.Associativity

Constructor Summary

Constructors

Constructor	Description
Operator(java.lang.String symbol, int arity, Operator.Associativity associativity, double precedence)

Method Summary

Modifier and Type	Method	Description
int	compareTo(Operator that)
int	getArity()	1 for unary, 2 for binary, etc.
Operator.Associativity	getAssociativity()
double	getPrecedence()
Operator	instance()
boolean	isInfix()	True iff the operator is an infix operator (e.g., a-b).
boolean	isLeftAssociative()
boolean	isPostfix()	True iff the operator is a postfix operator (e.g., a').
boolean	isPrefix()	True iff the operator is a prefix operator (e.g., -a).
boolean	isRightAssociative()

Methods inherited from class org.scijava.parse.Token

getToken, toString

Methods inherited from class java.lang.Object

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

Constructor Detail

Operator

public Operator(java.lang.String symbol,
                int arity,
                Operator.Associativity associativity,
                double precedence)

Method Detail

getArity

public int getArity()

1 for unary, 2 for binary, etc.

getAssociativity

public Operator.Associativity getAssociativity()

isLeftAssociative

public boolean isLeftAssociative()

isRightAssociative

public boolean isRightAssociative()

isInfix

public boolean isInfix()

True iff the operator is an infix operator (e.g., a-b).

isPrefix

public boolean isPrefix()

True iff the operator is a prefix operator (e.g., -a).

isPostfix

public boolean isPostfix()

True iff the operator is a postfix operator (e.g., a').

getPrecedence

public double getPrecedence()

instance

public Operator instance()

compareTo

public int compareTo(Operator that)

Specified by:

compareTo in interface java.lang.Comparable<Operator>