Record Class BinOp

java.lang.Object

java.lang.Record

BinOp

All Implemented Interfaces:

Expr

record BinOp(String op, Expr left, Expr right)
extends Record
implements Expr

Our internal representation of a BinOp in the OG0 language.

Field Summary

Fields

Modifier and Type	Field	Description
(package private) static final String	END_TOKEN
static final List<Pair<String,BinaryOperator<Double>>>	OP_FUNCS
static final List<String>	OPS
(package private) static final String	START_TOKEN

Fields inherited from interface Expr

PUNCTUATION

Constructor Summary

Constructors

Constructor	Description
BinOp(String op, Expr left, Expr right)	Creates an instance of a BinOp record class.

Method Summary

Modifier and Type	Method	Description
(package private) static void	dbg(String fmt, Object... args)
final boolean	equals(Object o)	Indicates whether some other object is "equal to" this one.
Value	eval()	Evaluate a given Expr.
(package private) static Value	evalBinOp(String op, double l, double r)	Evaluate E's `op` w/ `l` and `r`
final int	hashCode()	Returns a hash code value for this object.
Expr	left()	Returns the value of the left record component.
String	op()	Returns the value of the op record component.
static BinOp	parse(Scanner s, String punctuation)	“@Override” Expr.parse(java.lang.String)
Expr	right()	Returns the value of the right 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

END_TOKEN

static final String END_TOKEN

See Also:

• Constant Field Values

OP_FUNCS

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

OPS

public static final List<String> OPS

Constructor Details

BinOp

BinOp(String op,
 Expr left,
 Expr right)

Creates an instance of a BinOp record class.

Parameters:

op - the value for the op record component

left - the value for the left record component

right - the value for the right 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 BinOp 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'.)

evalBinOp

static Value evalBinOp(String op,
 double l,
 double r)

Evaluate E's `op` w/ `l` and `r`

dbg

static void dbg(String fmt,
 Object... args)

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.

op

public String op()

Returns the value of the op record component.

Returns:

the value of the op record component

left

public Expr left()

Returns the value of the left record component.

Returns:

the value of the left record component

right

public Expr right()

Returns the value of the right record component.

Returns:

the value of the right record component