[antlr-interest] Exclusion rule

[Liviu U]

I would like to have a rule that matches a C# block but ignores everything
inside
something like:

block  '{'  anything '}' ....

I tried to use the syntax i saw in token definition... ~X to match anything
except X. The problem is that the recursion never stops even with a simple
input text
if i have nested blocks.
Any clue?

grammar Test2;

options
{
  backtrack=true;
}

tokens
{
  TK_BLOCK;
}

prog
    :     (ID | block)*;

block
    :    '{'  (   block | (  ~( '}' )   )*   ) *   '}';


WS     :     (' '|'\r' | '\n' | '\t' )+ {skip();};
ID     :     'a'..'z'|'A'..'Z';
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