Enum Class LexicalUnit

java.lang.Object

java.lang.Enum<LexicalUnit>

LexicalUnit

All Implemented Interfaces:

Serializable, Comparable<LexicalUnit>, Constable

public enum LexicalUnit
extends Enum<LexicalUnit>

A terminal symbol, a.k.a. a letter in the grammar.

Nested Class Summary

Nested classes/interfaces inherited from class java.lang.Enum

Enum.EnumDesc<E extends Enum<E>>

Enum Constant Summary

Enum Constants

Enum Constant	Description
ASSIGN	=
DIVIDE	/
DO	Do
ELSE	Else
END	End
EOS	End Of Stream
EQUAL	==
IF	If
IMPLIES	->
INPUT	Input
IS	Is
LBRACK	{
LPAREN	(
MINUS	-
NUMBER	[Number]
PIPE	|
PLUS	+
PRINT	Print
PROG	Prog
PROGNAME	[ProgName]
RBRACK	}
RPAREN	)
SEMI	;
SMALEQ	<=
SMALLER	<
THEN	The
TIMES	*
VARNAME	[VarName]
WHILE	While

Constructor Summary

Constructors

Modifier	Constructor	Description
private	LexicalUnit()

Method Summary

Modifier and Type	Method	Description
static LexicalUnit	valueOf(String name)	Returns the enum constant of this class with the specified name.
static LexicalUnit[]	values()	Returns an array containing the constants of this enum class, in the order they are declared.

Methods inherited from class java.lang.Enum

clone, compareTo, describeConstable, equals, finalize, getDeclaringClass, hashCode, name, ordinal, toString, valueOf

Methods inherited from class java.lang.Object

getClass, notify, notifyAll, wait, wait, wait

Enum Constant Details

PROGNAME

public static final LexicalUnit PROGNAME

[ProgName]

VARNAME

public static final LexicalUnit VARNAME

[VarName]

NUMBER

public static final LexicalUnit NUMBER

[Number]

PROG

public static final LexicalUnit PROG

Prog

IS

public static final LexicalUnit IS

Is

END

public static final LexicalUnit END

End

SEMI

public static final LexicalUnit SEMI

;

ASSIGN

public static final LexicalUnit ASSIGN

=

LPAREN

public static final LexicalUnit LPAREN

(

RPAREN

public static final LexicalUnit RPAREN

)

MINUS

public static final LexicalUnit MINUS

-

PLUS

public static final LexicalUnit PLUS

+

TIMES

public static final LexicalUnit TIMES

*

DIVIDE

public static final LexicalUnit DIVIDE

/

IF

public static final LexicalUnit IF

If

THEN

public static final LexicalUnit THEN

The

ELSE

public static final LexicalUnit ELSE

Else

LBRACK

public static final LexicalUnit LBRACK

{

RBRACK

public static final LexicalUnit RBRACK

}

IMPLIES

public static final LexicalUnit IMPLIES

->

PIPE

public static final LexicalUnit PIPE

|

EQUAL

public static final LexicalUnit EQUAL

==

SMALEQ

public static final LexicalUnit SMALEQ

<=

SMALLER

public static final LexicalUnit SMALLER

<

WHILE

public static final LexicalUnit WHILE

While

DO

public static final LexicalUnit DO

Do

PRINT

public static final LexicalUnit PRINT

Print

INPUT

public static final LexicalUnit INPUT

Input

EOS

public static final LexicalUnit EOS

End Of Stream

Constructor Details

LexicalUnit

private LexicalUnit()

Method Details

values

public static LexicalUnit[] values()

Returns an array containing the constants of this enum class, in the order they are declared.

Returns:

an array containing the constants of this enum class, in the order they are declared

valueOf

public static LexicalUnit valueOf(String name)

Returns the enum constant of this class with the specified name. The string must match exactly an identifier used to declare an enum constant in this class. (Extraneous whitespace characters are not permitted.)

Parameters:

name - the name of the enum constant to be returned.

Returns:

the enum constant with the specified name

Throws:

IllegalArgumentException - if this enum class has no constant with the specified name

NullPointerException - if the argument is null