lib/parser.js
function() {
    this.expect('unless');
    this.state.push('conditional');
    this.cond = true;
    var node = new nodes.If(this.expression(), true);
    this.cond = false;
    node.block = this.block(node, false);
    this.state.pop();
    return node;
  }
function() {
    this.expect('unless');
    this.state.push('conditional');
    this.cond = true;
    var node = new nodes.If(this.expression(), true);
    this.cond = false;
    node.block = this.block(node, false);
    this.state.pop();
    return node;
  }
function ( ) { this . expect ( 'unless' ) ; this . state . push ( 'conditional' ) ; this . cond = true ; var node = new nodes . If ( this . expression ( ) , true ) ; this . cond = false ; node . block = this . block ( node , false ) ; this . state . pop ( ) ; return node ; }
unless expression block
unless expression block