[antlr-interest] expression parser example Expr.g dont work

[Mats Ekberg]

I have stripped the classical expr.g example and when I run it in
ANTLRWorks it dont work.
The input "(1 + 2) * 3 - 4" (with a newline at the end) just recognizes
"( 1 + 2" and the nothing more.
How come?

grammar Expr;

prog:   stat+ ;

stat:   expr NEWLINE 
    |   NEWLINE
    ;

expr
    :   multExpr ( '+' multExpr | '-' multExpr )*
    ;

multExpr 
    :   atom ('*' atom )*
    ; 

atom 
    :   INT 
    |   '(' expr ')'
    ;

INT :   '0'..'9'+ ;
NEWLINE:'\r'? '\n' ;
WS  :   (' '|'\t')+ {skip();} ;
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