GRAMMARS

Grammar Notation

2.4

BreakStatement:

break

Identifier

opt

 ;

is a convenient abbreviation for:

BreakStatement:

break ;

break

Identifier

 ;

and that:

ForStatement

:

for (

ForInit

opt

 ;

Expression

opt

 ;

ForUpdate

opt

 )

Statement

is a convenient abbreviation for:

ForStatement

:

for ( ;

Expression

opt

 ;

ForUpdate

opt

 )

Statement

for (

ForInit

 ;

Expression

opt

 ;

ForUpdate

opt

 )

Statement

which in turn is an abbreviation for:

ForStatement

:

for ( ; ;

ForUpdate

opt

 )

Statement

for ( ;

Expression

 ;

ForUpdate

opt

 )

Statement

for (

ForInit

 ; ;

ForUpdate

opt

 )

Statement

for (

ForInit

 ;

Expression

 ;

ForUpdate

opt

 )

Statement

which in turn is an abbreviation for:

ForStatement

:

for ( ; ; )

Statement

for ( ; ;

ForUpdate

 )

Statement

for ( ;

Expression

 ; )

Statement

for ( ;

Expression

 ;

ForUpdate

 )

Statement

for (

ForInit

 ; ; )

Statement

for (

ForInit

 ; ;

ForUpdate

 )

Statement

for (

ForInit

 ;

Expression

 ; )

Statement

for (

ForInit

 ;

Expression

 ;

ForUpdate

 )

Statement

so the nonterminal

ForStatement

 actually has eight alternative right hand sides.

A very long right hand side may be continued on a second line by substan 

tially indenting this second line, as in:

ConstructorDeclaration

:

ConstructorModifiers

opt

ConstructorDeclarator

Throws

opt

ConstructorBody

9