Grammar

In the MiniJava grammar, we use the notation N $^{\textstyle *}$, where N is a nonterminal, to mean 0, 1, or more repetitions of N.

Program	$\!\!\!\!\rightarrow\!\!\!\!$	MainClass ClassDecl $^{\textstyle *}$
MainClass	$\!\!\!\!\rightarrow\!\!\!\!$	class id { public static void main ( String [] id )
		{ Statement } }
ClassDecl	$\!\!\!\!\rightarrow\!\!\!\!$	class id { VarDecl $^{\textstyle *}$ MethodDecl $^{\textstyle *}$ }
	$\!\!\!\!\rightarrow\!\!\!\!$	class id extends id { VarDecl $^{\textstyle *}$ MethodDecl $^{\textstyle *}$ }
VarDecl	$\!\!\!\!\rightarrow\!\!\!\!$	Type id ;
MethodDecl	$\!\!\!\!\rightarrow\!\!\!\!$	public Type id ( FormalList )
		{ VarDecl $^{\textstyle *}$ Statement $^{\textstyle *}$ return Exp ; }
FormalList	$\!\!\!\!\rightarrow\!\!\!\!$	Type id FormalRest $^{\textstyle *}$
	$\!\!\!\!\rightarrow\!\!\!\!$
FormalRest	$\!\!\!\!\rightarrow\!\!\!\!$	, Type id
Type	$\!\!\!\!\rightarrow\!\!\!\!$	int []
	$\!\!\!\!\rightarrow\!\!\!\!$	boolean
	$\!\!\!\!\rightarrow\!\!\!\!$	int
	$\!\!\!\!\rightarrow\!\!\!\!$	id
Statement	$\!\!\!\!\rightarrow\!\!\!\!$	{ Statement $^{\textstyle *}$ }
	$\!\!\!\!\rightarrow\!\!\!\!$	if ( Exp ) Statement else Statement
	$\!\!\!\!\rightarrow\!\!\!\!$	while ( Exp ) Statement
	$\!\!\!\!\rightarrow\!\!\!\!$	System.out.println ( Exp ) ;
	$\!\!\!\!\rightarrow\!\!\!\!$	id = Exp ;
	$\!\!\!\!\rightarrow\!\!\!\!$	id [ Exp ] = Exp ;
Exp	$\!\!\!\!\rightarrow\!\!\!\!$	Exp op Exp
	$\!\!\!\!\rightarrow\!\!\!\!$	Exp [ Exp ]
	$\!\!\!\!\rightarrow\!\!\!\!$	Exp . length
	$\!\!\!\!\rightarrow\!\!\!\!$	Exp . id ( ExpList )
	$\!\!\!\!\rightarrow\!\!\!\!$	INTEGER_LITERAL
	$\!\!\!\!\rightarrow\!\!\!\!$	true
	$\!\!\!\!\rightarrow\!\!\!\!$	false
	$\!\!\!\!\rightarrow\!\!\!\!$	id
	$\!\!\!\!\rightarrow\!\!\!\!$	this
	$\!\!\!\!\rightarrow\!\!\!\!$	new int [ Exp ]
	$\!\!\!\!\rightarrow\!\!\!\!$	new id ( )
	$\!\!\!\!\rightarrow\!\!\!\!$	! Exp
	$\!\!\!\!\rightarrow\!\!\!\!$	( Exp )
ExpList	$\!\!\!\!\rightarrow\!\!\!\!$	Exp ExpRest $^{\textstyle *}$
	$\!\!\!\!\rightarrow\!\!\!\!$
ExpRest	$\!\!\!\!\rightarrow\!\!\!\!$	, Exp

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