[antlr-interest] Re: doubt in java grammar,

[micheal_jor <open.zone at virgin.net>]

--- In antlr-interest at yahoogroups.com, "cintyram <cintyram at y...>" 
<cintyram at y...> wrote:
> hi,
>  in the java grammar i found this rule ..
> 
> // conditional test (level 12)
> conditionalExpression
> 	:	logicalOrExpression
> 		( QUESTION^ assignmentExpression COLON! 
conditionalExpression )?
> 	;
> 
> is it not true that (expr)? { s1;} : {s2} ;
> is same as if(expr)
>              {s1;}
>             else
>              {s2;}
> 
> in which case both of them should be statement|blockstatement
> 
> ; also could some one explain why the existing choice was made?

for ( <init> ; <cond> ; <iter> )
{
  // body
}

is also equivalent to:

<init>
while ( <cond> )
{
  // body
  <iter>
}

Do you have any doubt about the FOR or WHILE rules either?  ;-)

Micheal



 

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