Record Class IfZero

java.lang.Object

java.lang.Record

IfZero

All Implemented Interfaces:

Expr

record IfZero(Expr test, Expr thenAns, Expr elseAns)
extends Record
implements Expr

Our internal representation of a IfZero expr in the OG0 language.

Field Summary

Fields

Modifier and Type	Field	Description
(package private) static final String	CONT_TOKEN1
(package private) static final String	CONT_TOKEN3
(package private) static final double	EPSILON
(package private) static final String	START_TOKEN

Fields inherited from interface Expr

PUNCTUATION

Constructor Summary

Constructors

Constructor	Description
IfZero(Expr test, Expr thenAns, Expr elseAns)	Creates an instance of a IfZero record class.

Method Summary

Modifier and Type	Method	Description
Expr	elseAns()	Returns the value of the elseAns record component.
final boolean	equals(Object o)	Indicates whether some other object is "equal to" this one.
Value	eval()	Evaluate a given Expr.
final int	hashCode()	Returns a hash code value for this object.
static IfZero	parse(Scanner s, String punctuation)	“@Override” Expr.parse(java.lang.String)
Expr	test()	Returns the value of the test record component.
Expr	thenAns()	Returns the value of the thenAns record component.
String	toString()	Returns a string representation of this record class.

Methods inherited from class java.lang.Object

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

Field Details

START_TOKEN

static final String START_TOKEN

See Also:

• Constant Field Values

CONT_TOKEN1

static final String CONT_TOKEN1

See Also:

• Constant Field Values

CONT_TOKEN3

static final String CONT_TOKEN3

See Also:

• Constant Field Values

EPSILON

static final double EPSILON

See Also:

• Constant Field Values

Constructor Details

IfZero

IfZero(Expr test,
 Expr thenAns,
 Expr elseAns)

Creates an instance of a IfZero record class.

Parameters:

test - the value for the test record component

thenAns - the value for the thenAns record component

elseAns - the value for the elseAns record component

Method Details

toString

public String toString()

Returns a string representation of this record class. The representation contains the name of the class, followed by the name and value of each of the record components.

Specified by:

toString in interface Expr

Specified by:

toString in class Record

Returns:

a string representation of this object

parse

public static IfZero parse(Scanner s,
 String punctuation)

“@Override” Expr.parse(java.lang.String)

eval

public Value eval()

Description copied from interface: Expr

Evaluate a given Expr.

Specified by:

eval in interface Expr

Returns:

the Value this Expr evaluates to. (In OG0, all values are numbers (doubles), but in OG3 that will change, which is why we have pre-emptively made the return type 'Value'.)

hashCode

public final int hashCode()

Returns a hash code value for this object. The value is derived from the hash code of each of the record components.

Specified by:

hashCode in class Record

Returns:

a hash code value for this object

equals

public final boolean equals(Object o)

Indicates whether some other object is "equal to" this one. The objects are equal if the other object is of the same class and if all the record components are equal. All components in this record class are compared with Objects::equals(Object,Object).

Specified by:

equals in class Record

Parameters:

o - the object with which to compare

Returns:

true if this object is the same as the o argument; false otherwise.

test

public Expr test()

Returns the value of the test record component.

Returns:

the value of the test record component

thenAns

public Expr thenAns()

Returns the value of the thenAns record component.

Returns:

the value of the thenAns record component

elseAns

public Expr elseAns()

Returns the value of the elseAns record component.

Returns:

the value of the elseAns record component