Class BinOp

java.lang.Object

Expr

BinOp

public class BinOp
extends Expr

Field Summary

Fields

Modifier and Type	Field	Description
static final List<Pair<String,BinaryOperator<Double>>>	OP_FUNCS
static final List<String>	OPS

Fields inherited from class Expr

PUNCTUATION

Method Summary

Modifier and Type	Method	Description
boolean	equals(Object that)
Value	eval()	Evaluate a given Expr.
int	hashCode()
static BinOp	parse(Scanner s, String punctuation)
String	toString()	Return a String representation of this Expr.

Methods inherited from class Expr

parse, parse

Methods inherited from class java.lang.Object

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

Field Details

OP_FUNCS

public static final List<Pair<String,BinaryOperator<Double>>> OP_FUNCS

OPS

public static final List<String> OPS

Method Details

toString

public String toString()

Description copied from class: Expr

Return a String representation of this Expr. The result will be something which can be passed into 'parse(String)' to get the same Expr back. That is, toString and parse are inverses of each other.

Specified by:

toString in class Expr

Returns:

a String representation of this Expr.

parse

public static BinOp parse(Scanner s,
 String punctuation)

eval

public Value eval()

Description copied from class: Expr

Evaluate a given Expr.

Specified by:

eval in class Expr

Returns:

the Value this Expr evaluates to. (In X0, all values are numbers (doubles), but in X3 that will change, which is why we have pre-emptively made the return type 'Value'.)

equals

public boolean equals(Object that)

Overrides:

equals in class Object

hashCode

public int hashCode()

Overrides:

hashCode in class Object