function () {
                    var curly, index = parserInput.i;

                    if (parserInput.currentChar() === '@' && (curly = parserInput.$re(/^@\{([\w-]+)\}/))) {
                        return new(tree.Variable)('@' + curly[1], index, fileInfo);
                    }
                }
function () {
                    var curly, index = parserInput.i;

                    if (parserInput.currentChar() === '@' && (curly = parserInput.$re(/^@\{([\w-]+)\}/))) {
                        return new(tree.Variable)('@' + curly[1], index, fileInfo);
                    }
                }
function ( ) { var curly , index = parserInput . i ; if ( parserInput . currentChar ( ) === '@' && ( curly = parserInput . $re ( / ^@\{([\w-]+)\} / ) ) ) { return new ( tree . Variable ) ( '@' + curly [ 1 ] , index , fileInfo ) ; } }
A variable entity using the protective {} e.g. @{var}
A variable entity using the protective {} e . g .