[antlr-interest] NoViableAltException

[Jim Idle]

You need to left factor the common introduction to both lays and  
decide what it us when you hit ';' or don't.

Jim

On Dec 13, 2009, at 11:49, Johannes Bittner  
<johannes.bittner at gmail.com> wrote:

> Hello,
>
> The Java code generated for the following grammar produces a
> NoViableAltException when using "void foo (int a, int b) { foo }" as
> input, i.e. when the second token is "foo", it works otherwise. I
> tried this with antlrworks 1.3.1. Could somebody clearify why this
> happens?
>
> Thanks, Johannes
>
> method
>    : type ID '(' args ')' ';'
>    | type ID '(' args ')' '{' 'foo' '}'
>    ;
>
> type: 'void' | 'int';
> args: arg (',' arg)*;
> arg: 'int' ID;
>
> ID  :   ('a'..'z'|'A'..'Z')+ ;
> INT :   '0'..'9'+ ;
> WS  :   (' '|'\t'|'\r'|'\n')+ {skip();} ;
>
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